--- /dev/null
+{
+ "git": {
+ "sha1": "1ccf058c2ba13fd7eee2154951ac64a84590d886"
+ },
+ "path_in_vcs": ""
+}
\ No newline at end of file
--- /dev/null
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+This project adheres to [Semantic Versioning](https://semver.org).
+
+<!--
+Note: In this file, do not use the hard wrap in the middle of a sentence for compatibility with GitHub comment style markdown rendering.
+-->
+
+## [Unreleased]
+
+## [0.2.9] - 2022-04-26
+
+- Improve compile time of `pin_project!` calls. (#71, thanks @nnethercote)
+
+## [0.2.8] - 2021-12-31
+
+- Fix handling of trailing commas in `PinnedDrop` impl. ([#64](https://github.com/taiki-e/pin-project-lite/pull/64), thanks @Michael-J-Ward)
+
+## [0.2.7] - 2021-06-26
+
+- [Support custom Drop implementation.](https://github.com/taiki-e/pin-project-lite/pull/25) See [#25](https://github.com/taiki-e/pin-project-lite/pull/25) for details.
+
+## [0.2.6] - 2021-03-04
+
+- Support item attributes in any order. ([#57](https://github.com/taiki-e/pin-project-lite/pull/57), thanks @SabrinaJewson)
+
+## [0.2.5] - 2021-03-02
+
+- [Prepare for removal of `safe_packed_borrows` lint.](https://github.com/taiki-e/pin-project-lite/pull/55) See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+## [0.2.4] - 2021-01-11
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- Add `project_replace`. ([#43](https://github.com/taiki-e/pin-project-lite/pull/43), thanks @Marwes)
+
+## [0.2.3] - 2021-01-09
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- [Suppress `clippy::unknown_clippy_lints` lint in generated code.](https://github.com/taiki-e/pin-project-lite/pull/47)
+
+## [0.2.2] - 2021-01-09
+
+**Note:** This release has been yanked.** See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- [Suppress `clippy::ref_option_ref` lint in generated code.](https://github.com/taiki-e/pin-project-lite/pull/45)
+
+## [0.2.1] - 2021-01-05
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- Exclude unneeded files from crates.io.
+
+## [0.2.0] - 2020-11-13
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- [`pin_project!` macro now supports enums.](https://github.com/taiki-e/pin-project-lite/pull/28)
+
+ To use `pin_project!` on enums, you need to name the projection type returned from the method.
+
+ ```rust
+ use pin_project_lite::pin_project;
+ use std::pin::Pin;
+
+ pin_project! {
+ #[project = EnumProj]
+ enum Enum<T, U> {
+ Variant { #[pin] pinned: T, unpinned: U },
+ }
+ }
+
+ impl<T, U> Enum<T, U> {
+ fn method(self: Pin<&mut Self>) {
+ match self.project() {
+ EnumProj::Variant { pinned, unpinned } => {
+ let _: Pin<&mut T> = pinned;
+ let _: &mut U = unpinned;
+ }
+ }
+ }
+ }
+ ```
+
+- [Support naming the projection types.](https://github.com/taiki-e/pin-project-lite/pull/28)
+
+ By passing an attribute with the same name as the method, you can name the projection type returned from the method:
+
+ ```rust
+ use pin_project_lite::pin_project;
+ use std::pin::Pin;
+
+ pin_project! {
+ #[project = StructProj]
+ struct Struct<T> {
+ #[pin]
+ field: T,
+ }
+ }
+
+ fn func<T>(x: Pin<&mut Struct<T>>) {
+ let StructProj { field } = x.project();
+ let _: Pin<&mut T> = field;
+ }
+ ```
+
+## [0.1.12] - 2021-03-02
+
+- [Prepare for removal of `safe_packed_borrows` lint.](https://github.com/taiki-e/pin-project-lite/pull/55) See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+## [0.1.11] - 2020-10-20
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- Suppress `clippy::redundant_pub_crate` lint in generated code.
+
+- Documentation improvements.
+
+## [0.1.10] - 2020-10-01
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- Suppress `drop_bounds` lint, which will be added to rustc in the future. See [taiki-e/pin-project#272](https://github.com/taiki-e/pin-project/issues/272) for more details.
+
+## [0.1.9] - 2020-09-29
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- [Fix trailing comma support in generics.](https://github.com/taiki-e/pin-project-lite/pull/32)
+
+## [0.1.8] - 2020-09-26
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- [Fix compatibility of generated code with `forbid(future_incompatible)`.](https://github.com/taiki-e/pin-project-lite/pull/30)
+
+ Note: This does not guarantee compatibility with `forbid(future_incompatible)` in the future.
+ If rustc adds a new lint, we may not be able to keep this.
+
+## [0.1.7] - 2020-06-04
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- [Support `?Sized` bounds in where clauses.](https://github.com/taiki-e/pin-project-lite/pull/22)
+
+- [Fix lifetime inference error when an associated type is used in fields.](https://github.com/taiki-e/pin-project-lite/pull/20)
+
+- Suppress `clippy::used_underscore_binding` lint in generated code.
+
+- Documentation improvements.
+
+## [0.1.6] - 2020-05-31
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- [Support lifetime bounds in where clauses.](https://github.com/taiki-e/pin-project-lite/pull/18)
+
+- Documentation improvements.
+
+## [0.1.5] - 2020-05-07
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- [Support overwriting the name of `core` crate.](https://github.com/taiki-e/pin-project-lite/pull/14)
+
+## [0.1.4] - 2020-01-20
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- [Support ?Sized bounds in generic parameters.](https://github.com/taiki-e/pin-project-lite/pull/9)
+
+## [0.1.3] - 2020-01-20
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- [Support lifetime bounds in generic parameters.](https://github.com/taiki-e/pin-project-lite/pull/7)
+
+## [0.1.2] - 2020-01-05
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- Support recognizing default generic parameters. ([#6](https://github.com/taiki-e/pin-project-lite/pull/6), thanks @kennytm)
+
+## [0.1.1] - 2019-11-15
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+- [`pin_project!` macro now determines the visibility of the projection type/method is based on the original type.](https://github.com/taiki-e/pin-project-lite/pull/5)
+
+## [0.1.0] - 2019-10-22
+
+**Note:** This release has been yanked. See [#55](https://github.com/taiki-e/pin-project-lite/pull/55) for details.
+
+Initial release
+
+[Unreleased]: https://github.com/taiki-e/pin-project-lite/compare/v0.2.9...HEAD
+[0.2.9]: https://github.com/taiki-e/pin-project-lite/compare/v0.2.8...v0.2.9
+[0.2.8]: https://github.com/taiki-e/pin-project-lite/compare/v0.2.7...v0.2.8
+[0.2.7]: https://github.com/taiki-e/pin-project-lite/compare/v0.2.6...v0.2.7
+[0.2.6]: https://github.com/taiki-e/pin-project-lite/compare/v0.2.5...v0.2.6
+[0.2.5]: https://github.com/taiki-e/pin-project-lite/compare/v0.2.4...v0.2.5
+[0.2.4]: https://github.com/taiki-e/pin-project-lite/compare/v0.2.3...v0.2.4
+[0.2.3]: https://github.com/taiki-e/pin-project-lite/compare/v0.2.2...v0.2.3
+[0.2.2]: https://github.com/taiki-e/pin-project-lite/compare/v0.2.1...v0.2.2
+[0.2.1]: https://github.com/taiki-e/pin-project-lite/compare/v0.2.0...v0.2.1
+[0.2.0]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.11...v0.2.0
+[0.1.12]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.11...v0.1.12
+[0.1.11]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.10...v0.1.11
+[0.1.10]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.9...v0.1.10
+[0.1.9]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.8...v0.1.9
+[0.1.8]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.7...v0.1.8
+[0.1.7]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.6...v0.1.7
+[0.1.6]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.5...v0.1.6
+[0.1.5]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.4...v0.1.5
+[0.1.4]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.3...v0.1.4
+[0.1.3]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.2...v0.1.3
+[0.1.2]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.1...v0.1.2
+[0.1.1]: https://github.com/taiki-e/pin-project-lite/compare/v0.1.0...v0.1.1
+[0.1.0]: https://github.com/taiki-e/pin-project-lite/releases/tag/v0.1.0
--- /dev/null
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+rust-version = "1.37"
+name = "pin-project-lite"
+version = "0.2.9"
+exclude = [
+ "/.*",
+ "/tools",
+]
+description = """
+A lightweight version of pin-project written with declarative macros.
+"""
+keywords = [
+ "pin",
+ "macros",
+]
+categories = [
+ "no-std",
+ "rust-patterns",
+]
+license = "Apache-2.0 OR MIT"
+repository = "https://github.com/taiki-e/pin-project-lite"
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[dev-dependencies.rustversion]
+version = "1"
+
+[dev-dependencies.static_assertions]
+version = "1"
+
+[dev-dependencies.trybuild]
+version = "1.0.49"
--- /dev/null
+[package]
+name = "pin-project-lite"
+version = "0.2.9"
+edition = "2018"
+rust-version = "1.37"
+license = "Apache-2.0 OR MIT"
+repository = "https://github.com/taiki-e/pin-project-lite"
+keywords = ["pin", "macros"]
+categories = ["no-std", "rust-patterns"]
+exclude = ["/.*", "/tools"]
+description = """
+A lightweight version of pin-project written with declarative macros.
+"""
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[workspace]
+members = [
+ "tests/doc",
+ "tests/no-core",
+ "tests/no-std",
+]
+
+[dev-dependencies]
+macrotest = { git = "https://github.com/taiki-e/macrotest.git", rev = "779cfa5" } # https://github.com/eupn/macrotest/pull/69
+rustversion = "1"
+static_assertions = "1"
+trybuild = "1.0.49"
--- /dev/null
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+ 1. Definitions.
+
+ "License" shall mean the terms and conditions for use, reproduction,
+ and distribution as defined by Sections 1 through 9 of this document.
+
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+ the copyright owner that is granting the License.
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+ "You" (or "Your") shall mean an individual or Legal Entity
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+ "Work" shall mean the work of authorship, whether in Source or
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+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
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+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
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+ 6. Trademarks. This License does not grant permission to use the trade
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+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
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+ PARTICULAR PURPOSE. You are solely responsible for determining the
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+ risks associated with Your exercise of permissions under this License.
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+ 8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
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+ 9. Accepting Warranty or Additional Liability. While redistributing
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+ END OF TERMS AND CONDITIONS
--- /dev/null
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
--- /dev/null
+# pin-project-lite
+
+[](https://crates.io/crates/pin-project-lite)
+[](https://docs.rs/pin-project-lite)
+[](#license)
+[](https://www.rust-lang.org)
+[](https://github.com/taiki-e/pin-project-lite/actions)
+
+A lightweight version of [pin-project] written with declarative macros.
+
+## Usage
+
+Add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+pin-project-lite = "0.2"
+```
+
+*Compiler support: requires rustc 1.37+*
+
+## Examples
+
+[`pin_project!`] macro creates a projection type covering all the fields of
+struct.
+
+```rust
+use std::pin::Pin;
+
+use pin_project_lite::pin_project;
+
+pin_project! {
+ struct Struct<T, U> {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ }
+}
+
+impl<T, U> Struct<T, U> {
+ fn method(self: Pin<&mut Self>) {
+ let this = self.project();
+ let _: Pin<&mut T> = this.pinned; // Pinned reference to the field
+ let _: &mut U = this.unpinned; // Normal reference to the field
+ }
+}
+```
+
+To use [`pin_project!`] on enums, you need to name the projection type
+returned from the method.
+
+```rust
+use std::pin::Pin;
+
+use pin_project_lite::pin_project;
+
+pin_project! {
+ #[project = EnumProj]
+ enum Enum<T, U> {
+ Variant { #[pin] pinned: T, unpinned: U },
+ }
+}
+
+impl<T, U> Enum<T, U> {
+ fn method(self: Pin<&mut Self>) {
+ match self.project() {
+ EnumProj::Variant { pinned, unpinned } => {
+ let _: Pin<&mut T> = pinned;
+ let _: &mut U = unpinned;
+ }
+ }
+ }
+}
+```
+
+## [pin-project] vs pin-project-lite
+
+Here are some similarities and differences compared to [pin-project].
+
+### Similar: Safety
+
+pin-project-lite guarantees safety in much the same way as [pin-project].
+Both are completely safe unless you write other unsafe code.
+
+### Different: Minimal design
+
+This library does not tackle as expansive of a range of use cases as
+[pin-project] does. If your use case is not already covered, please use
+[pin-project].
+
+### Different: No proc-macro related dependencies
+
+This is the **only** reason to use this crate. However, **if you already
+have proc-macro related dependencies in your crate's dependency graph, there
+is no benefit from using this crate.** (Note: There is almost no difference
+in the amount of code generated between [pin-project] and pin-project-lite.)
+
+### Different: No useful error messages
+
+This macro does not handle any invalid input. So error messages are not to
+be useful in most cases. If you do need useful error messages, then upon
+error you can pass the same input to [pin-project] to receive a helpful
+description of the compile error.
+
+### Different: No support for custom Unpin implementation
+
+pin-project supports this by [`UnsafeUnpin`][unsafe-unpin] and [`!Unpin`][not-unpin].
+
+### Different: No support for tuple structs and tuple variants
+
+pin-project supports this.
+
+[`pin_project!`]: https://docs.rs/pin-project-lite/0.2/pin_project_lite/macro.pin_project.html
+[not-unpin]: https://docs.rs/pin-project/1/pin_project/attr.pin_project.html#unpin
+[pin-project]: https://github.com/taiki-e/pin-project
+[unsafe-unpin]: https://docs.rs/pin-project/1/pin_project/attr.pin_project.html#unsafeunpin
+
+## License
+
+Licensed under either of [Apache License, Version 2.0](LICENSE-APACHE) or
+[MIT license](LICENSE-MIT) at your option.
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall
+be dual licensed as above, without any additional terms or conditions.
--- /dev/null
+//! A lightweight version of [pin-project] written with declarative macros.
+//!
+//! # Examples
+//!
+//! [`pin_project!`] macro creates a projection type covering all the fields of struct.
+//!
+//! ```rust
+//! use std::pin::Pin;
+//!
+//! use pin_project_lite::pin_project;
+//!
+//! pin_project! {
+//! struct Struct<T, U> {
+//! #[pin]
+//! pinned: T,
+//! unpinned: U,
+//! }
+//! }
+//!
+//! impl<T, U> Struct<T, U> {
+//! fn method(self: Pin<&mut Self>) {
+//! let this = self.project();
+//! let _: Pin<&mut T> = this.pinned; // Pinned reference to the field
+//! let _: &mut U = this.unpinned; // Normal reference to the field
+//! }
+//! }
+//! ```
+//!
+//! To use [`pin_project!`] on enums, you need to name the projection type
+//! returned from the method.
+//!
+//! ```rust
+//! use std::pin::Pin;
+//!
+//! use pin_project_lite::pin_project;
+//!
+//! pin_project! {
+//! #[project = EnumProj]
+//! enum Enum<T, U> {
+//! Variant { #[pin] pinned: T, unpinned: U },
+//! }
+//! }
+//!
+//! impl<T, U> Enum<T, U> {
+//! fn method(self: Pin<&mut Self>) {
+//! match self.project() {
+//! EnumProj::Variant { pinned, unpinned } => {
+//! let _: Pin<&mut T> = pinned;
+//! let _: &mut U = unpinned;
+//! }
+//! }
+//! }
+//! }
+//! ```
+//!
+//! # [pin-project] vs pin-project-lite
+//!
+//! Here are some similarities and differences compared to [pin-project].
+//!
+//! ## Similar: Safety
+//!
+//! pin-project-lite guarantees safety in much the same way as [pin-project].
+//! Both are completely safe unless you write other unsafe code.
+//!
+//! ## Different: Minimal design
+//!
+//! This library does not tackle as expansive of a range of use cases as
+//! [pin-project] does. If your use case is not already covered, please use
+//! [pin-project].
+//!
+//! ## Different: No proc-macro related dependencies
+//!
+//! This is the **only** reason to use this crate. However, **if you already
+//! have proc-macro related dependencies in your crate's dependency graph, there
+//! is no benefit from using this crate.** (Note: There is almost no difference
+//! in the amount of code generated between [pin-project] and pin-project-lite.)
+//!
+//! ## Different: No useful error messages
+//!
+//! This macro does not handle any invalid input. So error messages are not to
+//! be useful in most cases. If you do need useful error messages, then upon
+//! error you can pass the same input to [pin-project] to receive a helpful
+//! description of the compile error.
+//!
+//! ## Different: No support for custom Unpin implementation
+//!
+//! pin-project supports this by [`UnsafeUnpin`][unsafe-unpin] and [`!Unpin`][not-unpin].
+//!
+//! ## Different: No support for tuple structs and tuple variants
+//!
+//! pin-project supports this.
+//!
+//! [not-unpin]: https://docs.rs/pin-project/1/pin_project/attr.pin_project.html#unpin
+//! [pin-project]: https://github.com/taiki-e/pin-project
+//! [unsafe-unpin]: https://docs.rs/pin-project/1/pin_project/attr.pin_project.html#unsafeunpin
+
+#![no_std]
+#![doc(test(
+ no_crate_inject,
+ attr(
+ deny(warnings, rust_2018_idioms, single_use_lifetimes),
+ allow(dead_code, unused_variables)
+ )
+))]
+#![warn(rust_2018_idioms, single_use_lifetimes, unreachable_pub)]
+#![warn(clippy::default_trait_access, clippy::wildcard_imports)]
+
+/// A macro that creates a projection type covering all the fields of struct.
+///
+/// This macro creates a projection type according to the following rules:
+///
+/// - For the field that uses `#[pin]` attribute, makes the pinned reference to the field.
+/// - For the other fields, makes the unpinned reference to the field.
+///
+/// And the following methods are implemented on the original type:
+///
+/// ```rust
+/// # use std::pin::Pin;
+/// # type Projection<'a> = &'a ();
+/// # type ProjectionRef<'a> = &'a ();
+/// # trait Dox {
+/// fn project(self: Pin<&mut Self>) -> Projection<'_>;
+/// fn project_ref(self: Pin<&Self>) -> ProjectionRef<'_>;
+/// # }
+/// ```
+///
+/// By passing an attribute with the same name as the method to the macro,
+/// you can name the projection type returned from the method. This allows you
+/// to use pattern matching on the projected types.
+///
+/// ```rust
+/// # use pin_project_lite::pin_project;
+/// # use std::pin::Pin;
+/// pin_project! {
+/// #[project = EnumProj]
+/// enum Enum<T> {
+/// Variant { #[pin] field: T },
+/// }
+/// }
+///
+/// impl<T> Enum<T> {
+/// fn method(self: Pin<&mut Self>) {
+/// let this: EnumProj<'_, T> = self.project();
+/// match this {
+/// EnumProj::Variant { field } => {
+/// let _: Pin<&mut T> = field;
+/// }
+/// }
+/// }
+/// }
+/// ```
+///
+/// By passing the `#[project_replace = MyProjReplace]` attribute you may create an additional
+/// method which allows the contents of `Pin<&mut Self>` to be replaced while simultaneously moving
+/// out all unpinned fields in `Self`.
+///
+/// ```rust
+/// # use std::pin::Pin;
+/// # type MyProjReplace = ();
+/// # trait Dox {
+/// fn project_replace(self: Pin<&mut Self>, replacement: Self) -> MyProjReplace;
+/// # }
+/// ```
+///
+/// Also, note that the projection types returned by `project` and `project_ref` have
+/// an additional lifetime at the beginning of generics.
+///
+/// ```text
+/// let this: EnumProj<'_, T> = self.project();
+/// ^^
+/// ```
+///
+/// The visibility of the projected types and projection methods is based on the
+/// original type. However, if the visibility of the original type is `pub`, the
+/// visibility of the projected types and the projection methods is downgraded
+/// to `pub(crate)`.
+///
+/// # Safety
+///
+/// `pin_project!` macro guarantees safety in much the same way as [pin-project] crate.
+/// Both are completely safe unless you write other unsafe code.
+///
+/// See [pin-project] crate for more details.
+///
+/// # Examples
+///
+/// ```rust
+/// use std::pin::Pin;
+///
+/// use pin_project_lite::pin_project;
+///
+/// pin_project! {
+/// struct Struct<T, U> {
+/// #[pin]
+/// pinned: T,
+/// unpinned: U,
+/// }
+/// }
+///
+/// impl<T, U> Struct<T, U> {
+/// fn method(self: Pin<&mut Self>) {
+/// let this = self.project();
+/// let _: Pin<&mut T> = this.pinned; // Pinned reference to the field
+/// let _: &mut U = this.unpinned; // Normal reference to the field
+/// }
+/// }
+/// ```
+///
+/// To use `pin_project!` on enums, you need to name the projection type
+/// returned from the method.
+///
+/// ```rust
+/// use std::pin::Pin;
+///
+/// use pin_project_lite::pin_project;
+///
+/// pin_project! {
+/// #[project = EnumProj]
+/// enum Enum<T> {
+/// Struct {
+/// #[pin]
+/// field: T,
+/// },
+/// Unit,
+/// }
+/// }
+///
+/// impl<T> Enum<T> {
+/// fn method(self: Pin<&mut Self>) {
+/// match self.project() {
+/// EnumProj::Struct { field } => {
+/// let _: Pin<&mut T> = field;
+/// }
+/// EnumProj::Unit => {}
+/// }
+/// }
+/// }
+/// ```
+///
+/// If you want to call the `project()` method multiple times or later use the
+/// original [`Pin`] type, it needs to use [`.as_mut()`][`Pin::as_mut`] to avoid
+/// consuming the [`Pin`].
+///
+/// ```rust
+/// use std::pin::Pin;
+///
+/// use pin_project_lite::pin_project;
+///
+/// pin_project! {
+/// struct Struct<T> {
+/// #[pin]
+/// field: T,
+/// }
+/// }
+///
+/// impl<T> Struct<T> {
+/// fn call_project_twice(mut self: Pin<&mut Self>) {
+/// // `project` consumes `self`, so reborrow the `Pin<&mut Self>` via `as_mut`.
+/// self.as_mut().project();
+/// self.as_mut().project();
+/// }
+/// }
+/// ```
+///
+/// # `!Unpin`
+///
+/// If you want to ensure that [`Unpin`] is not implemented, use `#[pin]`
+/// attribute for a [`PhantomPinned`] field.
+///
+/// ```rust
+/// use std::marker::PhantomPinned;
+///
+/// use pin_project_lite::pin_project;
+///
+/// pin_project! {
+/// struct Struct<T> {
+/// field: T,
+/// #[pin] // <------ This `#[pin]` is required to make `Struct` to `!Unpin`.
+/// _pin: PhantomPinned,
+/// }
+/// }
+/// ```
+///
+/// Note that using [`PhantomPinned`] without `#[pin]` attribute has no effect.
+///
+/// [`PhantomPinned`]: core::marker::PhantomPinned
+/// [`Pin::as_mut`]: core::pin::Pin::as_mut
+/// [`Pin`]: core::pin::Pin
+/// [pin-project]: https://github.com/taiki-e/pin-project
+#[macro_export]
+macro_rules! pin_project {
+ ($($tt:tt)*) => {
+ $crate::__pin_project_internal! {
+ [][][][]
+ $($tt)*
+ }
+ };
+}
+
+// limitations:
+// - no support for tuple structs and tuple variant (wontfix).
+// - no support for multiple trait/lifetime bounds.
+// - no support for `Self` in where clauses. (wontfix)
+// - no support for overlapping lifetime names. (wontfix)
+// - no interoperability with other field attributes.
+// - no useful error messages. (wontfix)
+// etc...
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_expand {
+ (
+ [$($proj_mut_ident:ident)?]
+ [$($proj_ref_ident:ident)?]
+ [$($proj_replace_ident:ident)?]
+ [$proj_vis:vis]
+ [$(#[$attrs:meta])* $vis:vis $struct_ty_ident:ident $ident:ident]
+ [$($def_generics:tt)*]
+ [$($impl_generics:tt)*] [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ {
+ $($body_data:tt)*
+ }
+ $(impl $($pinned_drop:tt)*)?
+ ) => {
+ $crate::__pin_project_reconstruct! {
+ [$(#[$attrs])* $vis $struct_ty_ident $ident]
+ [$($def_generics)*] [$($impl_generics)*]
+ [$($ty_generics)*] [$(where $($where_clause)*)?]
+ {
+ $($body_data)*
+ }
+ }
+
+ $crate::__pin_project_make_proj_ty! {
+ [$($proj_mut_ident)?]
+ [$proj_vis $struct_ty_ident $ident]
+ [__pin_project_make_proj_field_mut]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ {
+ $($body_data)*
+ }
+ }
+ $crate::__pin_project_make_proj_ty! {
+ [$($proj_ref_ident)?]
+ [$proj_vis $struct_ty_ident $ident]
+ [__pin_project_make_proj_field_ref]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ {
+ $($body_data)*
+ }
+ }
+ $crate::__pin_project_make_proj_replace_ty! {
+ [$($proj_replace_ident)?]
+ [$proj_vis $struct_ty_ident]
+ [__pin_project_make_proj_field_replace]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ {
+ $($body_data)*
+ }
+ }
+
+ $crate::__pin_project_constant! {
+ [$(#[$attrs])* $vis $struct_ty_ident $ident]
+ [$($proj_mut_ident)?] [$($proj_ref_ident)?] [$($proj_replace_ident)?]
+ [$proj_vis]
+ [$($def_generics)*] [$($impl_generics)*]
+ [$($ty_generics)*] [$(where $($where_clause)*)?]
+ {
+ $($body_data)*
+ }
+ $(impl $($pinned_drop)*)?
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_constant {
+ (
+ [$(#[$attrs:meta])* $vis:vis struct $ident:ident]
+ [$($proj_mut_ident:ident)?] [$($proj_ref_ident:ident)?] [$($proj_replace_ident:ident)?]
+ [$proj_vis:vis]
+ [$($def_generics:tt)*]
+ [$($impl_generics:tt)*] [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ {
+ $(
+ $(#[$pin:ident])?
+ $field_vis:vis $field:ident: $field_ty:ty
+ ),+ $(,)?
+ }
+ $(impl $($pinned_drop:tt)*)?
+ ) => {
+ #[allow(explicit_outlives_requirements)] // https://github.com/rust-lang/rust/issues/60993
+ #[allow(single_use_lifetimes)] // https://github.com/rust-lang/rust/issues/55058
+ // This lint warns of `clippy::*` generated by external macros.
+ // We allow this lint for compatibility with older compilers.
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::redundant_pub_crate)] // This lint warns `pub(crate)` field in private struct.
+ #[allow(clippy::used_underscore_binding)]
+ const _: () = {
+ $crate::__pin_project_make_proj_ty! {
+ [$($proj_mut_ident)? Projection]
+ [$proj_vis struct $ident]
+ [__pin_project_make_proj_field_mut]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ {
+ $(
+ $(#[$pin])?
+ $field_vis $field: $field_ty
+ ),+
+ }
+ }
+ $crate::__pin_project_make_proj_ty! {
+ [$($proj_ref_ident)? ProjectionRef]
+ [$proj_vis struct $ident]
+ [__pin_project_make_proj_field_ref]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ {
+ $(
+ $(#[$pin])?
+ $field_vis $field: $field_ty
+ ),+
+ }
+ }
+
+ impl <$($impl_generics)*> $ident <$($ty_generics)*>
+ $(where
+ $($where_clause)*)?
+ {
+ $crate::__pin_project_struct_make_proj_method! {
+ [$($proj_mut_ident)? Projection]
+ [$proj_vis]
+ [project get_unchecked_mut mut]
+ [$($ty_generics)*]
+ {
+ $(
+ $(#[$pin])?
+ $field_vis $field
+ ),+
+ }
+ }
+ $crate::__pin_project_struct_make_proj_method! {
+ [$($proj_ref_ident)? ProjectionRef]
+ [$proj_vis]
+ [project_ref get_ref]
+ [$($ty_generics)*]
+ {
+ $(
+ $(#[$pin])?
+ $field_vis $field
+ ),+
+ }
+ }
+ $crate::__pin_project_struct_make_proj_replace_method! {
+ [$($proj_replace_ident)?]
+ [$proj_vis]
+ [ProjectionReplace]
+ [$($ty_generics)*]
+ {
+ $(
+ $(#[$pin])?
+ $field_vis $field
+ ),+
+ }
+ }
+ }
+
+ $crate::__pin_project_make_unpin_impl! {
+ [$vis $ident]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ $(
+ $field: $crate::__pin_project_make_unpin_bound!(
+ $(#[$pin])? $field_ty
+ )
+ ),+
+ }
+
+ $crate::__pin_project_make_drop_impl! {
+ [$ident]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ $(impl $($pinned_drop)*)?
+ }
+
+ // Ensure that it's impossible to use pin projections on a #[repr(packed)] struct.
+ //
+ // Taking a reference to a packed field is UB, and applying
+ // `#[forbid(unaligned_references)]` makes sure that doing this is a hard error.
+ //
+ // If the struct ends up having #[repr(packed)] applied somehow,
+ // this will generate an (unfriendly) error message. Under all reasonable
+ // circumstances, we'll detect the #[repr(packed)] attribute, and generate
+ // a much nicer error above.
+ //
+ // See https://github.com/taiki-e/pin-project/pull/34 for more details.
+ //
+ // Note:
+ // - Lint-based tricks aren't perfect, but they're much better than nothing:
+ // https://github.com/taiki-e/pin-project-lite/issues/26
+ //
+ // - Enable both unaligned_references and safe_packed_borrows lints
+ // because unaligned_references lint does not exist in older compilers:
+ // https://github.com/taiki-e/pin-project-lite/pull/55
+ // https://github.com/rust-lang/rust/pull/82525
+ #[forbid(unaligned_references, safe_packed_borrows)]
+ fn __assert_not_repr_packed <$($impl_generics)*> (this: &$ident <$($ty_generics)*>)
+ $(where
+ $($where_clause)*)?
+ {
+ $(
+ let _ = &this.$field;
+ )+
+ }
+ };
+ };
+ (
+ [$(#[$attrs:meta])* $vis:vis enum $ident:ident]
+ [$($proj_mut_ident:ident)?] [$($proj_ref_ident:ident)?] [$($proj_replace_ident:ident)?]
+ [$proj_vis:vis]
+ [$($def_generics:tt)*]
+ [$($impl_generics:tt)*] [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ {
+ $(
+ $(#[$variant_attrs:meta])*
+ $variant:ident $({
+ $(
+ $(#[$pin:ident])?
+ $field:ident: $field_ty:ty
+ ),+ $(,)?
+ })?
+ ),+ $(,)?
+ }
+ $(impl $($pinned_drop:tt)*)?
+ ) => {
+ #[allow(single_use_lifetimes)] // https://github.com/rust-lang/rust/issues/55058
+ // This lint warns of `clippy::*` generated by external macros.
+ // We allow this lint for compatibility with older compilers.
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::used_underscore_binding)]
+ const _: () = {
+ impl <$($impl_generics)*> $ident <$($ty_generics)*>
+ $(where
+ $($where_clause)*)?
+ {
+ $crate::__pin_project_enum_make_proj_method! {
+ [$($proj_mut_ident)?]
+ [$proj_vis]
+ [project get_unchecked_mut mut]
+ [$($ty_generics)*]
+ {
+ $(
+ $variant $({
+ $(
+ $(#[$pin])?
+ $field
+ ),+
+ })?
+ ),+
+ }
+ }
+ $crate::__pin_project_enum_make_proj_method! {
+ [$($proj_ref_ident)?]
+ [$proj_vis]
+ [project_ref get_ref]
+ [$($ty_generics)*]
+ {
+ $(
+ $variant $({
+ $(
+ $(#[$pin])?
+ $field
+ ),+
+ })?
+ ),+
+ }
+ }
+ $crate::__pin_project_enum_make_proj_replace_method! {
+ [$($proj_replace_ident)?]
+ [$proj_vis]
+ [$($ty_generics)*]
+ {
+ $(
+ $variant $({
+ $(
+ $(#[$pin])?
+ $field
+ ),+
+ })?
+ ),+
+ }
+ }
+ }
+
+ $crate::__pin_project_make_unpin_impl! {
+ [$vis $ident]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ $(
+ $variant: ($(
+ $(
+ $crate::__pin_project_make_unpin_bound!(
+ $(#[$pin])? $field_ty
+ )
+ ),+
+ )?)
+ ),+
+ }
+
+ $crate::__pin_project_make_drop_impl! {
+ [$ident]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ $(impl $($pinned_drop)*)?
+ }
+
+ // We don't need to check for '#[repr(packed)]',
+ // since it does not apply to enums.
+ };
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_reconstruct {
+ (
+ [$(#[$attrs:meta])* $vis:vis struct $ident:ident]
+ [$($def_generics:tt)*] [$($impl_generics:tt)*]
+ [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ {
+ $(
+ $(#[$pin:ident])?
+ $field_vis:vis $field:ident: $field_ty:ty
+ ),+ $(,)?
+ }
+ ) => {
+ $(#[$attrs])*
+ $vis struct $ident $($def_generics)*
+ $(where
+ $($where_clause)*)?
+ {
+ $(
+ $field_vis $field: $field_ty
+ ),+
+ }
+ };
+ (
+ [$(#[$attrs:meta])* $vis:vis enum $ident:ident]
+ [$($def_generics:tt)*] [$($impl_generics:tt)*]
+ [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ {
+ $(
+ $(#[$variant_attrs:meta])*
+ $variant:ident $({
+ $(
+ $(#[$pin:ident])?
+ $field:ident: $field_ty:ty
+ ),+ $(,)?
+ })?
+ ),+ $(,)?
+ }
+ ) => {
+ $(#[$attrs])*
+ $vis enum $ident $($def_generics)*
+ $(where
+ $($where_clause)*)?
+ {
+ $(
+ $(#[$variant_attrs])*
+ $variant $({
+ $(
+ $field: $field_ty
+ ),+
+ })?
+ ),+
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_proj_ty {
+ ([] $($field:tt)*) => {};
+ (
+ [$proj_ty_ident:ident $default_ident:ident]
+ [$proj_vis:vis struct $ident:ident]
+ $($field:tt)*
+ ) => {};
+ (
+ [$proj_ty_ident:ident]
+ [$proj_vis:vis struct $ident:ident]
+ [$__pin_project_make_proj_field:ident]
+ [$($impl_generics:tt)*] [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ {
+ $(
+ $(#[$pin:ident])?
+ $field_vis:vis $field:ident: $field_ty:ty
+ ),+ $(,)?
+ }
+ ) => {
+ $crate::__pin_project_make_proj_ty_body! {
+ [$proj_ty_ident]
+ [$proj_vis struct $ident]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ [
+ $(
+ $field_vis $field: $crate::$__pin_project_make_proj_field!(
+ $(#[$pin])? $field_ty
+ )
+ ),+
+ ]
+ }
+ };
+ (
+ [$proj_ty_ident:ident]
+ [$proj_vis:vis enum $ident:ident]
+ [$__pin_project_make_proj_field:ident]
+ [$($impl_generics:tt)*] [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ {
+ $(
+ $(#[$variant_attrs:meta])*
+ $variant:ident $({
+ $(
+ $(#[$pin:ident])?
+ $field:ident: $field_ty:ty
+ ),+ $(,)?
+ })?
+ ),+ $(,)?
+ }
+ ) => {
+ $crate::__pin_project_make_proj_ty_body! {
+ [$proj_ty_ident]
+ [$proj_vis enum $ident]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ [
+ $(
+ $variant $({
+ $(
+ $field: $crate::$__pin_project_make_proj_field!(
+ $(#[$pin])? $field_ty
+ )
+ ),+
+ })?
+ ),+
+ ]
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_proj_ty_body {
+ (
+ [$proj_ty_ident:ident]
+ [$proj_vis:vis $struct_ty_ident:ident $ident:ident]
+ [$($impl_generics:tt)*] [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ [$($body_data:tt)+]
+ ) => {
+ #[allow(dead_code)] // This lint warns unused fields/variants.
+ #[allow(single_use_lifetimes)] // https://github.com/rust-lang/rust/issues/55058
+ // This lint warns of `clippy::*` generated by external macros.
+ // We allow this lint for compatibility with older compilers.
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)] // This lint warns `&mut &mut <ty>`. (only needed for project)
+ #[allow(clippy::redundant_pub_crate)] // This lint warns `pub(crate)` field in private struct.
+ #[allow(clippy::ref_option_ref)] // This lint warns `&Option<&<ty>>`. (only needed for project_ref)
+ #[allow(clippy::type_repetition_in_bounds)] // https://github.com/rust-lang/rust-clippy/issues/4326
+ $proj_vis $struct_ty_ident $proj_ty_ident <'__pin, $($impl_generics)*>
+ where
+ $ident <$($ty_generics)*>: '__pin
+ $(, $($where_clause)*)?
+ {
+ $($body_data)+
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_proj_replace_ty {
+ ([] $($field:tt)*) => {};
+ (
+ [$proj_ty_ident:ident]
+ [$proj_vis:vis struct]
+ [$__pin_project_make_proj_field:ident]
+ [$($impl_generics:tt)*] [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ {
+ $(
+ $(#[$pin:ident])?
+ $field_vis:vis $field:ident: $field_ty:ty
+ ),+ $(,)?
+ }
+ ) => {
+ $crate::__pin_project_make_proj_replace_ty_body! {
+ [$proj_ty_ident]
+ [$proj_vis struct]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ [
+ $(
+ $field_vis $field: $crate::$__pin_project_make_proj_field!(
+ $(#[$pin])? $field_ty
+ )
+ ),+
+ ]
+ }
+ };
+ (
+ [$proj_ty_ident:ident]
+ [$proj_vis:vis enum]
+ [$__pin_project_make_proj_field:ident]
+ [$($impl_generics:tt)*] [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ {
+ $(
+ $(#[$variant_attrs:meta])*
+ $variant:ident $({
+ $(
+ $(#[$pin:ident])?
+ $field:ident: $field_ty:ty
+ ),+ $(,)?
+ })?
+ ),+ $(,)?
+ }
+ ) => {
+ $crate::__pin_project_make_proj_replace_ty_body! {
+ [$proj_ty_ident]
+ [$proj_vis enum]
+ [$($impl_generics)*] [$($ty_generics)*] [$(where $($where_clause)*)?]
+ [
+ $(
+ $variant $({
+ $(
+ $field: $crate::$__pin_project_make_proj_field!(
+ $(#[$pin])? $field_ty
+ )
+ ),+
+ })?
+ ),+
+ ]
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_proj_replace_ty_body {
+ (
+ [$proj_ty_ident:ident]
+ [$proj_vis:vis $struct_ty_ident:ident]
+ [$($impl_generics:tt)*] [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ [$($body_data:tt)+]
+ ) => {
+ #[allow(dead_code)] // This lint warns unused fields/variants.
+ #[allow(single_use_lifetimes)] // https://github.com/rust-lang/rust/issues/55058
+ #[allow(clippy::mut_mut)] // This lint warns `&mut &mut <ty>`. (only needed for project)
+ #[allow(clippy::redundant_pub_crate)] // This lint warns `pub(crate)` field in private struct.
+ #[allow(clippy::type_repetition_in_bounds)] // https://github.com/rust-lang/rust-clippy/issues/4326
+ $proj_vis $struct_ty_ident $proj_ty_ident <$($impl_generics)*>
+ where
+ $($($where_clause)*)?
+ {
+ $($body_data)+
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_proj_replace_block {
+ (
+ [$($proj_path:tt)+]
+ {
+ $(
+ $(#[$pin:ident])?
+ $field_vis:vis $field:ident
+ ),+
+ }
+ ) => {
+ let result = $($proj_path)* {
+ $(
+ $field: $crate::__pin_project_make_replace_field_proj!(
+ $(#[$pin])? $field
+ )
+ ),+
+ };
+
+ {
+ ( $(
+ $crate::__pin_project_make_unsafe_drop_in_place_guard!(
+ $(#[$pin])? $field
+ ),
+ )* );
+ }
+
+ result
+ };
+ ([$($proj_path:tt)+]) => { $($proj_path)* };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_struct_make_proj_method {
+ ([] $($variant:tt)*) => {};
+ (
+ [$proj_ty_ident:ident $_ignored_default_arg:ident]
+ [$proj_vis:vis]
+ [$method_ident:ident $get_method:ident $($mut:ident)?]
+ [$($ty_generics:tt)*]
+ $($variant:tt)*
+ ) => {
+ $crate::__pin_project_struct_make_proj_method! {
+ [$proj_ty_ident]
+ [$proj_vis]
+ [$method_ident $get_method $($mut)?]
+ [$($ty_generics)*]
+ $($variant)*
+ }
+ };
+ (
+ [$proj_ty_ident:ident]
+ [$proj_vis:vis]
+ [$method_ident:ident $get_method:ident $($mut:ident)?]
+ [$($ty_generics:tt)*]
+ {
+ $(
+ $(#[$pin:ident])?
+ $field_vis:vis $field:ident
+ ),+
+ }
+ ) => {
+ $proj_vis fn $method_ident<'__pin>(
+ self: $crate::__private::Pin<&'__pin $($mut)? Self>,
+ ) -> $proj_ty_ident <'__pin, $($ty_generics)*> {
+ unsafe {
+ let Self { $($field),* } = self.$get_method();
+ $proj_ty_ident {
+ $(
+ $field: $crate::__pin_project_make_unsafe_field_proj!(
+ $(#[$pin])? $field
+ )
+ ),+
+ }
+ }
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_struct_make_proj_replace_method {
+ ([] $($field:tt)*) => {};
+ (
+ [$proj_ty_ident:ident]
+ [$proj_vis:vis]
+ [$_proj_ty_ident:ident]
+ [$($ty_generics:tt)*]
+ {
+ $(
+ $(#[$pin:ident])?
+ $field_vis:vis $field:ident
+ ),+
+ }
+ ) => {
+ $proj_vis fn project_replace(
+ self: $crate::__private::Pin<&mut Self>,
+ replacement: Self,
+ ) -> $proj_ty_ident <$($ty_generics)*> {
+ unsafe {
+ let __self_ptr: *mut Self = self.get_unchecked_mut();
+
+ // Destructors will run in reverse order, so next create a guard to overwrite
+ // `self` with the replacement value without calling destructors.
+ let __guard = $crate::__private::UnsafeOverwriteGuard::new(__self_ptr, replacement);
+
+ let Self { $($field),* } = &mut *__self_ptr;
+
+ $crate::__pin_project_make_proj_replace_block! {
+ [$proj_ty_ident]
+ {
+ $(
+ $(#[$pin])?
+ $field
+ ),+
+ }
+ }
+ }
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_enum_make_proj_method {
+ ([] $($variant:tt)*) => {};
+ (
+ [$proj_ty_ident:ident]
+ [$proj_vis:vis]
+ [$method_ident:ident $get_method:ident $($mut:ident)?]
+ [$($ty_generics:tt)*]
+ {
+ $(
+ $variant:ident $({
+ $(
+ $(#[$pin:ident])?
+ $field:ident
+ ),+
+ })?
+ ),+
+ }
+ ) => {
+ $proj_vis fn $method_ident<'__pin>(
+ self: $crate::__private::Pin<&'__pin $($mut)? Self>,
+ ) -> $proj_ty_ident <'__pin, $($ty_generics)*> {
+ unsafe {
+ match self.$get_method() {
+ $(
+ Self::$variant $({
+ $($field),+
+ })? => {
+ $proj_ty_ident::$variant $({
+ $(
+ $field: $crate::__pin_project_make_unsafe_field_proj!(
+ $(#[$pin])? $field
+ )
+ ),+
+ })?
+ }
+ ),+
+ }
+ }
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_enum_make_proj_replace_method {
+ ([] $($field:tt)*) => {};
+ (
+ [$proj_ty_ident:ident]
+ [$proj_vis:vis]
+ [$($ty_generics:tt)*]
+ {
+ $(
+ $variant:ident $({
+ $(
+ $(#[$pin:ident])?
+ $field:ident
+ ),+
+ })?
+ ),+
+ }
+ ) => {
+ $proj_vis fn project_replace(
+ self: $crate::__private::Pin<&mut Self>,
+ replacement: Self,
+ ) -> $proj_ty_ident <$($ty_generics)*> {
+ unsafe {
+ let __self_ptr: *mut Self = self.get_unchecked_mut();
+
+ // Destructors will run in reverse order, so next create a guard to overwrite
+ // `self` with the replacement value without calling destructors.
+ let __guard = $crate::__private::UnsafeOverwriteGuard::new(__self_ptr, replacement);
+
+ match &mut *__self_ptr {
+ $(
+ Self::$variant $({
+ $($field),+
+ })? => {
+ $crate::__pin_project_make_proj_replace_block! {
+ [$proj_ty_ident :: $variant]
+ $({
+ $(
+ $(#[$pin])?
+ $field
+ ),+
+ })?
+ }
+ }
+ ),+
+ }
+ }
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_unpin_impl {
+ (
+ [$vis:vis $ident:ident]
+ [$($impl_generics:tt)*] [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ $($field:tt)*
+ ) => {
+ // Automatically create the appropriate conditional `Unpin` implementation.
+ //
+ // Basically this is equivalent to the following code:
+ // ```rust
+ // impl<T, U> Unpin for Struct<T, U> where T: Unpin {}
+ // ```
+ //
+ // However, if struct is public and there is a private type field,
+ // this would cause an E0446 (private type in public interface).
+ //
+ // When RFC 2145 is implemented (rust-lang/rust#48054),
+ // this will become a lint, rather then a hard error.
+ //
+ // As a workaround for this, we generate a new struct, containing all of the pinned
+ // fields from our #[pin_project] type. This struct is declared within
+ // a function, which makes it impossible to be named by user code.
+ // This guarantees that it will use the default auto-trait impl for Unpin -
+ // that is, it will implement Unpin iff all of its fields implement Unpin.
+ // This type can be safely declared as 'public', satisfying the privacy
+ // checker without actually allowing user code to access it.
+ //
+ // This allows users to apply the #[pin_project] attribute to types
+ // regardless of the privacy of the types of their fields.
+ //
+ // See also https://github.com/taiki-e/pin-project/pull/53.
+ #[allow(non_snake_case)]
+ $vis struct __Origin <'__pin, $($impl_generics)*>
+ $(where
+ $($where_clause)*)?
+ {
+ __dummy_lifetime: $crate::__private::PhantomData<&'__pin ()>,
+ $($field)*
+ }
+ impl <'__pin, $($impl_generics)*> $crate::__private::Unpin for $ident <$($ty_generics)*>
+ where
+ __Origin <'__pin, $($ty_generics)*>: $crate::__private::Unpin
+ $(, $($where_clause)*)?
+ {
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_drop_impl {
+ (
+ [$_ident:ident]
+ [$($_impl_generics:tt)*] [$($_ty_generics:tt)*] [$(where $($_where_clause:tt)*)?]
+ impl $(<
+ $( $lifetime:lifetime $(: $lifetime_bound:lifetime)? ),* $(,)?
+ $( $generics:ident
+ $(: $generics_bound:path)?
+ $(: ?$generics_unsized_bound:path)?
+ $(: $generics_lifetime_bound:lifetime)?
+ ),*
+ >)? PinnedDrop for $self_ty:ty
+ $(where
+ $( $where_clause_ty:ty
+ $(: $where_clause_bound:path)?
+ $(: ?$where_clause_unsized_bound:path)?
+ $(: $where_clause_lifetime_bound:lifetime)?
+ ),* $(,)?
+ )?
+ {
+ fn drop($($arg:ident)+: Pin<&mut Self>) {
+ $($tt:tt)*
+ }
+ }
+ ) => {
+ impl $(<
+ $( $lifetime $(: $lifetime_bound)? ,)*
+ $( $generics
+ $(: $generics_bound)?
+ $(: ?$generics_unsized_bound)?
+ $(: $generics_lifetime_bound)?
+ ),*
+ >)? $crate::__private::Drop for $self_ty
+ $(where
+ $( $where_clause_ty
+ $(: $where_clause_bound)?
+ $(: ?$where_clause_unsized_bound)?
+ $(: $where_clause_lifetime_bound)?
+ ),*
+ )?
+ {
+ fn drop(&mut self) {
+ // Implementing `__DropInner::__drop_inner` is safe, but calling it is not safe.
+ // This is because destructors can be called multiple times in safe code and
+ // [double dropping is unsound](https://github.com/rust-lang/rust/pull/62360).
+ //
+ // `__drop_inner` is defined as a safe method, but this is fine since
+ // `__drop_inner` is not accessible by the users and we call `__drop_inner` only
+ // once.
+ //
+ // Users can implement [`Drop`] safely using `pin_project!` and can drop a
+ // type that implements `PinnedDrop` using the [`drop`] function safely.
+ fn __drop_inner $(<
+ $( $lifetime $(: $lifetime_bound)? ,)*
+ $( $generics
+ $(: $generics_bound)?
+ $(: ?$generics_unsized_bound)?
+ $(: $generics_lifetime_bound)?
+ ),*
+ >)? (
+ $($arg)+: $crate::__private::Pin<&mut $self_ty>,
+ )
+ $(where
+ $( $where_clause_ty
+ $(: $where_clause_bound)?
+ $(: ?$where_clause_unsized_bound)?
+ $(: $where_clause_lifetime_bound)?
+ ),*
+ )?
+ {
+ // A dummy `__drop_inner` function to prevent users call outer `__drop_inner`.
+ fn __drop_inner() {}
+ $($tt)*
+ }
+
+ // Safety - we're in 'drop', so we know that 'self' will
+ // never move again.
+ let pinned_self: $crate::__private::Pin<&mut Self>
+ = unsafe { $crate::__private::Pin::new_unchecked(self) };
+ // We call `__drop_inner` only once. Since `__DropInner::__drop_inner`
+ // is not accessible by the users, it is never called again.
+ __drop_inner(pinned_self);
+ }
+ }
+ };
+ (
+ [$ident:ident]
+ [$($impl_generics:tt)*] [$($ty_generics:tt)*] [$(where $($where_clause:tt)*)?]
+ ) => {
+ // Ensure that struct does not implement `Drop`.
+ //
+ // There are two possible cases:
+ // 1. The user type does not implement Drop. In this case,
+ // the first blanked impl will not apply to it. This code
+ // will compile, as there is only one impl of MustNotImplDrop for the user type
+ // 2. The user type does impl Drop. This will make the blanket impl applicable,
+ // which will then conflict with the explicit MustNotImplDrop impl below.
+ // This will result in a compilation error, which is exactly what we want.
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: $crate::__private::Drop> MustNotImplDrop for T {}
+ impl <$($impl_generics)*> MustNotImplDrop for $ident <$($ty_generics)*>
+ $(where
+ $($where_clause)*)?
+ {
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_unpin_bound {
+ (#[pin] $field_ty:ty) => {
+ $field_ty
+ };
+ ($field_ty:ty) => {
+ $crate::__private::AlwaysUnpin<$field_ty>
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_unsafe_field_proj {
+ (#[pin] $field:ident) => {
+ $crate::__private::Pin::new_unchecked($field)
+ };
+ ($field:ident) => {
+ $field
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_replace_field_proj {
+ (#[pin] $field:ident) => {
+ $crate::__private::PhantomData
+ };
+ ($field:ident) => {
+ $crate::__private::ptr::read($field)
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_unsafe_drop_in_place_guard {
+ (#[pin] $field:ident) => {
+ $crate::__private::UnsafeDropInPlaceGuard::new($field)
+ };
+ ($field:ident) => {
+ ()
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_proj_field_mut {
+ (#[pin] $field_ty:ty) => {
+ $crate::__private::Pin<&'__pin mut ($field_ty)>
+ };
+ ($field_ty:ty) => {
+ &'__pin mut ($field_ty)
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_proj_field_ref {
+ (#[pin] $field_ty:ty) => {
+ $crate::__private::Pin<&'__pin ($field_ty)>
+ };
+ ($field_ty:ty) => {
+ &'__pin ($field_ty)
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_make_proj_field_replace {
+ (#[pin] $field_ty:ty) => {
+ $crate::__private::PhantomData<$field_ty>
+ };
+ ($field_ty:ty) => {
+ $field_ty
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_internal {
+ // parsing proj_mut_ident
+ (
+ []
+ [$($proj_ref_ident:ident)?]
+ [$($proj_replace_ident:ident)?]
+ [$($attrs:tt)*]
+
+ #[project = $proj_mut_ident:ident]
+ $($tt:tt)*
+ ) => {
+ $crate::__pin_project_internal! {
+ [$proj_mut_ident]
+ [$($proj_ref_ident)?]
+ [$($proj_replace_ident)?]
+ [$($attrs)*]
+ $($tt)*
+ }
+ };
+ // parsing proj_ref_ident
+ (
+ [$($proj_mut_ident:ident)?]
+ []
+ [$($proj_replace_ident:ident)?]
+ [$($attrs:tt)*]
+
+ #[project_ref = $proj_ref_ident:ident]
+ $($tt:tt)*
+ ) => {
+ $crate::__pin_project_internal! {
+ [$($proj_mut_ident)?]
+ [$proj_ref_ident]
+ [$($proj_replace_ident)?]
+ [$($attrs)*]
+ $($tt)*
+ }
+ };
+ // parsing proj_replace_ident
+ (
+ [$($proj_mut_ident:ident)?]
+ [$($proj_ref_ident:ident)?]
+ []
+ [$($attrs:tt)*]
+
+ #[project_replace = $proj_replace_ident:ident]
+ $($tt:tt)*
+ ) => {
+ $crate::__pin_project_internal! {
+ [$($proj_mut_ident)?]
+ [$($proj_ref_ident)?]
+ [$proj_replace_ident]
+ [$($attrs)*]
+ $($tt)*
+ }
+ };
+ // this is actually part of a recursive step that picks off a single non-`pin_project_lite` attribute
+ // there could be more to parse
+ (
+ [$($proj_mut_ident:ident)?]
+ [$($proj_ref_ident:ident)?]
+ [$($proj_replace_ident:ident)?]
+ [$($attrs:tt)*]
+
+ #[$($attr:tt)*]
+ $($tt:tt)*
+ ) => {
+ $crate::__pin_project_internal! {
+ [$($proj_mut_ident)?]
+ [$($proj_ref_ident)?]
+ [$($proj_replace_ident)?]
+ [$($attrs)* #[$($attr)*]]
+ $($tt)*
+ }
+ };
+ // now determine visibility
+ // if public, downgrade
+ (
+ [$($proj_mut_ident:ident)?]
+ [$($proj_ref_ident:ident)?]
+ [$($proj_replace_ident:ident)?]
+ [$($attrs:tt)*]
+ pub $struct_ty_ident:ident $ident:ident
+ $($tt:tt)*
+ ) => {
+ $crate::__pin_project_parse_generics! {
+ [$($proj_mut_ident)?]
+ [$($proj_ref_ident)?]
+ [$($proj_replace_ident)?]
+ [$($attrs)*]
+ [pub $struct_ty_ident $ident pub(crate)]
+ $($tt)*
+ }
+ };
+ (
+ [$($proj_mut_ident:ident)?]
+ [$($proj_ref_ident:ident)?]
+ [$($proj_replace_ident:ident)?]
+ [$($attrs:tt)*]
+ $vis:vis $struct_ty_ident:ident $ident:ident
+ $($tt:tt)*
+ ) => {
+ $crate::__pin_project_parse_generics! {
+ [$($proj_mut_ident)?]
+ [$($proj_ref_ident)?]
+ [$($proj_replace_ident)?]
+ [$($attrs)*]
+ [$vis $struct_ty_ident $ident $vis]
+ $($tt)*
+ }
+ };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __pin_project_parse_generics {
+ (
+ [$($proj_mut_ident:ident)?]
+ [$($proj_ref_ident:ident)?]
+ [$($proj_replace_ident:ident)?]
+ [$($attrs:tt)*]
+ [$vis:vis $struct_ty_ident:ident $ident:ident $proj_ty_vis:vis]
+ $(<
+ $( $lifetime:lifetime $(: $lifetime_bound:lifetime)? ),* $(,)?
+ $( $generics:ident
+ $(: $generics_bound:path)?
+ $(: ?$generics_unsized_bound:path)?
+ $(: $generics_lifetime_bound:lifetime)?
+ $(= $generics_default:ty)?
+ ),* $(,)?
+ >)?
+ $(where
+ $( $where_clause_ty:ty
+ $(: $where_clause_bound:path)?
+ $(: ?$where_clause_unsized_bound:path)?
+ $(: $where_clause_lifetime_bound:lifetime)?
+ ),* $(,)?
+ )?
+ {
+ $($body_data:tt)*
+ }
+ $(impl $($pinned_drop:tt)*)?
+ ) => {
+ $crate::__pin_project_expand! {
+ [$($proj_mut_ident)?]
+ [$($proj_ref_ident)?]
+ [$($proj_replace_ident)?]
+ [$proj_ty_vis]
+ [$($attrs)* $vis $struct_ty_ident $ident]
+ [$(<
+ $( $lifetime $(: $lifetime_bound)? ,)*
+ $( $generics
+ $(: $generics_bound)?
+ $(: ?$generics_unsized_bound)?
+ $(: $generics_lifetime_bound)?
+ $(= $generics_default)?
+ ),*
+ >)?]
+ [$(
+ $( $lifetime $(: $lifetime_bound)? ,)*
+ $( $generics
+ $(: $generics_bound)?
+ $(: ?$generics_unsized_bound)?
+ $(: $generics_lifetime_bound)?
+ ),*
+ )?]
+ [$( $( $lifetime ,)* $( $generics ),* )?]
+ [$(where $( $where_clause_ty
+ $(: $where_clause_bound)?
+ $(: ?$where_clause_unsized_bound)?
+ $(: $where_clause_lifetime_bound)?
+ ),* )?]
+ {
+ $($body_data)*
+ }
+ $(impl $($pinned_drop)*)?
+ }
+ };
+}
+
+#[doc(hidden)]
+pub mod __private {
+ use core::mem::ManuallyDrop;
+ #[doc(hidden)]
+ pub use core::{
+ marker::{PhantomData, Unpin},
+ ops::Drop,
+ pin::Pin,
+ ptr,
+ };
+
+ // This is an internal helper struct used by `pin_project!`.
+ #[doc(hidden)]
+ pub struct AlwaysUnpin<T: ?Sized>(PhantomData<T>);
+
+ impl<T: ?Sized> Unpin for AlwaysUnpin<T> {}
+
+ // This is an internal helper used to ensure a value is dropped.
+ #[doc(hidden)]
+ pub struct UnsafeDropInPlaceGuard<T: ?Sized>(*mut T);
+
+ impl<T: ?Sized> UnsafeDropInPlaceGuard<T> {
+ #[doc(hidden)]
+ pub unsafe fn new(ptr: *mut T) -> Self {
+ Self(ptr)
+ }
+ }
+
+ impl<T: ?Sized> Drop for UnsafeDropInPlaceGuard<T> {
+ fn drop(&mut self) {
+ unsafe {
+ ptr::drop_in_place(self.0);
+ }
+ }
+ }
+
+ // This is an internal helper used to ensure a value is overwritten without
+ // its destructor being called.
+ #[doc(hidden)]
+ pub struct UnsafeOverwriteGuard<T> {
+ target: *mut T,
+ value: ManuallyDrop<T>,
+ }
+
+ impl<T> UnsafeOverwriteGuard<T> {
+ #[doc(hidden)]
+ pub unsafe fn new(target: *mut T, value: T) -> Self {
+ Self { target, value: ManuallyDrop::new(value) }
+ }
+ }
+
+ impl<T> Drop for UnsafeOverwriteGuard<T> {
+ fn drop(&mut self) {
+ unsafe {
+ ptr::write(self.target, ptr::read(&*self.value));
+ }
+ }
+ }
+}
--- /dev/null
+# Tests
+
+Many of the tests in this repository are based on [pin-project's tests](https://github.com/taiki-e/pin-project/tree/HEAD/tests).
+
+To run all tests, run the following command:
+
+```sh
+cargo +nightly test --all
+```
+
+## UI tests (`ui`, `compiletest.rs`)
+
+This checks errors detected by the macro or the Rust compiler in the resulting
+expanded code.
+
+To run this test, run the following command:
+
+```sh
+cargo +nightly test --test compiletest
+```
+
+Locally, this test updates the files in the `ui` directory if there are
+changes to the generated code. If there are any changes to the files in the
+`ui` directory after running the test, please commit them.
+
+See also [`trybuild` documentation](https://docs.rs/trybuild).
+
+## Expansion tests (`expand`, `expandtest.rs`)
+
+Similar to ui tests, but instead of checking the compiler output, this checks
+the code generated by macros.
+
+See pin-project's [examples](https://github.com/taiki-e/pin-project/tree/HEAD/examples)
+for descriptions of what the generated code does, and why it needs to be generated.
+
+To run this test, run the following command:
+
+```sh
+cargo +nightly test --test expandtest
+```
+
+Locally, this test updates the files in the `expand` directory if there are
+changes to the generated code. If there are any changes to the files in the
+`expand` directory after running the test, please commit them.
+
+See also [`macrotest` documentation](https://docs.rs/macrotest).
--- /dev/null
+#![allow(dead_code, unused_macros)]
+
+macro_rules! assert_unpin {
+ ($ty:ty) => {
+ static_assertions::assert_impl_all!($ty: Unpin);
+ };
+}
+macro_rules! assert_not_unpin {
+ ($ty:ty) => {
+ static_assertions::assert_not_impl_all!($ty: Unpin);
+ };
+}
--- /dev/null
+#![cfg(not(miri))]
+#![warn(rust_2018_idioms, single_use_lifetimes)]
+
+use std::env;
+
+#[rustversion::attr(not(nightly), ignore)]
+#[test]
+fn ui() {
+ if env::var_os("CI").is_none() {
+ env::set_var("TRYBUILD", "overwrite");
+ }
+
+ let t = trybuild::TestCases::new();
+ t.compile_fail("tests/ui/**/*.rs");
+}
--- /dev/null
+#![warn(rust_2018_idioms, single_use_lifetimes)]
+
+// Refs: https://doc.rust-lang.org/reference/destructors.html
+
+use std::{cell::Cell, panic, pin::Pin, thread};
+
+use pin_project_lite::pin_project;
+
+struct D<'a>(&'a Cell<usize>, usize);
+
+impl Drop for D<'_> {
+ fn drop(&mut self) {
+ if !thread::panicking() {
+ let old = self.0.replace(self.1);
+ assert_eq!(old, self.1 - 1);
+ }
+ }
+}
+
+pin_project! {
+#[project = StructPinnedProj]
+#[project_ref = StructPinnedProjRef]
+#[project_replace = StructPinnedProjReplace]
+struct StructPinned<'a> {
+ #[pin]
+ f1: D<'a>,
+ #[pin]
+ f2: D<'a>,
+}
+}
+
+pin_project! {
+#[project = StructUnpinnedProj]
+#[project_ref = StructUnpinnedProjRef]
+#[project_replace = StructUnpinnedProjReplace]
+struct StructUnpinned<'a> {
+ f1: D<'a>,
+ f2: D<'a>,
+}
+}
+
+pin_project! {
+#[project_replace = EnumProjReplace]
+enum Enum<'a> {
+ #[allow(dead_code)] // false positive that fixed in Rust 1.38
+ StructPinned {
+ #[pin]
+ f1: D<'a>,
+ #[pin]
+ f2: D<'a>,
+ },
+ #[allow(dead_code)] // false positive that fixed in Rust 1.38
+ StructUnpinned {
+ f1: D<'a>,
+ f2: D<'a>,
+ },
+}
+}
+
+#[test]
+fn struct_pinned() {
+ {
+ let c = Cell::new(0);
+ let _x = StructPinned { f1: D(&c, 1), f2: D(&c, 2) };
+ }
+ {
+ let c = Cell::new(0);
+ let mut x = StructPinned { f1: D(&c, 1), f2: D(&c, 2) };
+ let y = Pin::new(&mut x);
+ let _z = y.project_replace(StructPinned { f1: D(&c, 3), f2: D(&c, 4) });
+ }
+}
+
+#[test]
+fn struct_unpinned() {
+ {
+ let c = Cell::new(0);
+ let _x = StructUnpinned { f1: D(&c, 1), f2: D(&c, 2) };
+ }
+ {
+ let c = Cell::new(0);
+ let mut x = StructUnpinned { f1: D(&c, 1), f2: D(&c, 2) };
+ let y = Pin::new(&mut x);
+ let _z = y.project_replace(StructUnpinned { f1: D(&c, 3), f2: D(&c, 4) });
+ }
+}
+
+#[test]
+fn enum_struct() {
+ {
+ let c = Cell::new(0);
+ let _x = Enum::StructPinned { f1: D(&c, 1), f2: D(&c, 2) };
+ }
+ {
+ let c = Cell::new(0);
+ let mut x = Enum::StructPinned { f1: D(&c, 1), f2: D(&c, 2) };
+ let y = Pin::new(&mut x);
+ let _z = y.project_replace(Enum::StructPinned { f1: D(&c, 3), f2: D(&c, 4) });
+ }
+
+ {
+ let c = Cell::new(0);
+ let _x = Enum::StructUnpinned { f1: D(&c, 1), f2: D(&c, 2) };
+ }
+ {
+ let c = Cell::new(0);
+ let mut x = Enum::StructUnpinned { f1: D(&c, 1), f2: D(&c, 2) };
+ let y = Pin::new(&mut x);
+ let _z = y.project_replace(Enum::StructUnpinned { f1: D(&c, 3), f2: D(&c, 4) });
+ }
+}
+
+// https://github.com/rust-lang/rust/issues/47949
+// https://github.com/taiki-e/pin-project/pull/194#discussion_r419098111
+#[allow(clippy::many_single_char_names)]
+#[test]
+fn project_replace_panic() {
+ pin_project! {
+ #[project_replace = SProjReplace]
+ struct S<T, U> {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ }
+ }
+
+ struct D<'a>(&'a mut bool, bool);
+ impl Drop for D<'_> {
+ fn drop(&mut self) {
+ *self.0 = true;
+ if self.1 {
+ panic!();
+ }
+ }
+ }
+
+ let (mut a, mut b, mut c, mut d) = (false, false, false, false);
+ let res = panic::catch_unwind(panic::AssertUnwindSafe(|| {
+ let mut x = S { pinned: D(&mut a, true), unpinned: D(&mut b, false) };
+ let _y = Pin::new(&mut x)
+ .project_replace(S { pinned: D(&mut c, false), unpinned: D(&mut d, false) });
+ // Previous `x.pinned` was dropped and panicked when `project_replace` is
+ // called, so this is unreachable.
+ unreachable!();
+ }));
+ assert!(res.is_err());
+ assert!(a);
+ assert!(b);
+ assert!(c);
+ assert!(d);
+
+ let (mut a, mut b, mut c, mut d) = (false, false, false, false);
+ let res = panic::catch_unwind(panic::AssertUnwindSafe(|| {
+ let mut x = S { pinned: D(&mut a, false), unpinned: D(&mut b, true) };
+ {
+ let _y = Pin::new(&mut x)
+ .project_replace(S { pinned: D(&mut c, false), unpinned: D(&mut d, false) });
+ // `_y` (previous `x.unpinned`) live to the end of this scope, so
+ // this is not unreachable.
+ // unreachable!();
+ }
+ unreachable!();
+ }));
+ assert!(res.is_err());
+ assert!(a);
+ assert!(b);
+ assert!(c);
+ assert!(d);
+}
--- /dev/null
+use pin_project_lite::pin_project;
+enum Enum<T, U> {
+ Struct { pinned: T, unpinned: U },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+enum EnumProj<'__pin, T, U>
+where
+ Enum<T, U>: '__pin,
+{
+ Struct {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned: &'__pin mut (U),
+ },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+enum EnumProjRef<'__pin, T, U>
+where
+ Enum<T, U>: '__pin,
+{
+ Struct {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned: &'__pin (U),
+ },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+enum EnumProjReplace<T, U> {
+ Struct {
+ pinned: ::pin_project_lite::__private::PhantomData<T>,
+ unpinned: U,
+ },
+ Unit,
+}
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ impl<T, U> Enum<T, U> {
+ fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> EnumProj<'__pin, T, U> {
+ unsafe {
+ match self.get_unchecked_mut() {
+ Self::Struct { pinned, unpinned } => EnumProj::Struct {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ },
+ Self::Unit => EnumProj::Unit,
+ }
+ }
+ }
+ fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> EnumProjRef<'__pin, T, U> {
+ unsafe {
+ match self.get_ref() {
+ Self::Struct { pinned, unpinned } => EnumProjRef::Struct {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ },
+ Self::Unit => EnumProjRef::Unit,
+ }
+ }
+ }
+ fn project_replace(
+ self: ::pin_project_lite::__private::Pin<&mut Self>,
+ replacement: Self,
+ ) -> EnumProjReplace<T, U> {
+ unsafe {
+ let __self_ptr: *mut Self = self.get_unchecked_mut();
+ let __guard = ::pin_project_lite::__private::UnsafeOverwriteGuard::new(
+ __self_ptr,
+ replacement,
+ );
+ match &mut *__self_ptr {
+ Self::Struct { pinned, unpinned } => {
+ let result = EnumProjReplace::Struct {
+ pinned: ::pin_project_lite::__private::PhantomData,
+ unpinned: ::pin_project_lite::__private::ptr::read(unpinned),
+ };
+ {
+ (
+ ::pin_project_lite::__private::UnsafeDropInPlaceGuard::new(pinned),
+ (),
+ );
+ }
+ result
+ }
+ Self::Unit => EnumProjReplace::Unit,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ Struct: (T, ::pin_project_lite::__private::AlwaysUnpin<U>),
+ Unit: (),
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Enum<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Enum<T, U> {}
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ #[project_replace = EnumProjReplace]
+ enum Enum<T, U> {
+ Struct {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ },
+ Unit,
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+struct Struct<T, U> {
+ pinned: T,
+ unpinned: U,
+}
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ struct Projection<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned: &'__pin mut (U),
+ }
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ struct ProjectionRef<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned: &'__pin (U),
+ }
+ impl<T, U> Struct<T, U> {
+ fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> Projection<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_unchecked_mut();
+ Projection {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> ProjectionRef<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_ref();
+ ProjectionRef {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ pinned: T,
+ unpinned: ::pin_project_lite::__private::AlwaysUnpin<U>,
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Struct<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Struct<T, U> {}
+ #[forbid(unaligned_references, safe_packed_borrows)]
+ fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+ let _ = &this.pinned;
+ let _ = &this.unpinned;
+ }
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ struct Struct<T, U> {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+enum Enum<T, U> {
+ Struct {
+ pinned1: T,
+ pinned2: T,
+ unpinned1: U,
+ unpinned2: U,
+ },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+enum EnumProjReplace<T, U> {
+ Struct {
+ pinned1: ::pin_project_lite::__private::PhantomData<T>,
+ pinned2: ::pin_project_lite::__private::PhantomData<T>,
+ unpinned1: U,
+ unpinned2: U,
+ },
+ Unit,
+}
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ impl<T, U> Enum<T, U> {
+ fn project_replace(
+ self: ::pin_project_lite::__private::Pin<&mut Self>,
+ replacement: Self,
+ ) -> EnumProjReplace<T, U> {
+ unsafe {
+ let __self_ptr: *mut Self = self.get_unchecked_mut();
+ let __guard = ::pin_project_lite::__private::UnsafeOverwriteGuard::new(
+ __self_ptr,
+ replacement,
+ );
+ match &mut *__self_ptr {
+ Self::Struct {
+ pinned1,
+ pinned2,
+ unpinned1,
+ unpinned2,
+ } => {
+ let result = EnumProjReplace::Struct {
+ pinned1: ::pin_project_lite::__private::PhantomData,
+ pinned2: ::pin_project_lite::__private::PhantomData,
+ unpinned1: ::pin_project_lite::__private::ptr::read(unpinned1),
+ unpinned2: ::pin_project_lite::__private::ptr::read(unpinned2),
+ };
+ {
+ (
+ ::pin_project_lite::__private::UnsafeDropInPlaceGuard::new(pinned1),
+ ::pin_project_lite::__private::UnsafeDropInPlaceGuard::new(pinned2),
+ (),
+ (),
+ );
+ }
+ result
+ }
+ Self::Unit => EnumProjReplace::Unit,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ Struct: (
+ T,
+ T,
+ ::pin_project_lite::__private::AlwaysUnpin<U>,
+ ::pin_project_lite::__private::AlwaysUnpin<U>,
+ ),
+ Unit: (),
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Enum<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Enum<T, U> {}
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+#[project_replace = EnumProjReplace]
+enum Enum<T, U> {
+ Struct {
+ #[pin]
+ pinned1: T,
+ #[pin]
+ pinned2: T,
+ unpinned1: U,
+ unpinned2: U,
+ },
+ Unit,
+}
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+struct Struct<T, U> {
+ pinned1: T,
+ pinned2: T,
+ unpinned1: U,
+ unpinned2: U,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+struct StructProjReplace<T, U> {
+ pinned1: ::pin_project_lite::__private::PhantomData<T>,
+ pinned2: ::pin_project_lite::__private::PhantomData<T>,
+ unpinned1: U,
+ unpinned2: U,
+}
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ struct Projection<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pinned1: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ pinned2: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned1: &'__pin mut (U),
+ unpinned2: &'__pin mut (U),
+ }
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ struct ProjectionRef<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pinned1: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ pinned2: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned1: &'__pin (U),
+ unpinned2: &'__pin (U),
+ }
+ impl<T, U> Struct<T, U> {
+ fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> Projection<'__pin, T, U> {
+ unsafe {
+ let Self {
+ pinned1,
+ pinned2,
+ unpinned1,
+ unpinned2,
+ } = self.get_unchecked_mut();
+ Projection {
+ pinned1: ::pin_project_lite::__private::Pin::new_unchecked(pinned1),
+ pinned2: ::pin_project_lite::__private::Pin::new_unchecked(pinned2),
+ unpinned1: unpinned1,
+ unpinned2: unpinned2,
+ }
+ }
+ }
+ fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> ProjectionRef<'__pin, T, U> {
+ unsafe {
+ let Self {
+ pinned1,
+ pinned2,
+ unpinned1,
+ unpinned2,
+ } = self.get_ref();
+ ProjectionRef {
+ pinned1: ::pin_project_lite::__private::Pin::new_unchecked(pinned1),
+ pinned2: ::pin_project_lite::__private::Pin::new_unchecked(pinned2),
+ unpinned1: unpinned1,
+ unpinned2: unpinned2,
+ }
+ }
+ }
+ fn project_replace(
+ self: ::pin_project_lite::__private::Pin<&mut Self>,
+ replacement: Self,
+ ) -> StructProjReplace<T, U> {
+ unsafe {
+ let __self_ptr: *mut Self = self.get_unchecked_mut();
+ let __guard = ::pin_project_lite::__private::UnsafeOverwriteGuard::new(
+ __self_ptr,
+ replacement,
+ );
+ let Self {
+ pinned1,
+ pinned2,
+ unpinned1,
+ unpinned2,
+ } = &mut *__self_ptr;
+ let result = StructProjReplace {
+ pinned1: ::pin_project_lite::__private::PhantomData,
+ pinned2: ::pin_project_lite::__private::PhantomData,
+ unpinned1: ::pin_project_lite::__private::ptr::read(unpinned1),
+ unpinned2: ::pin_project_lite::__private::ptr::read(unpinned2),
+ };
+ {
+ (
+ ::pin_project_lite::__private::UnsafeDropInPlaceGuard::new(pinned1),
+ ::pin_project_lite::__private::UnsafeDropInPlaceGuard::new(pinned2),
+ (),
+ (),
+ );
+ }
+ result
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ pinned1: T,
+ pinned2: T,
+ unpinned1: ::pin_project_lite::__private::AlwaysUnpin<U>,
+ unpinned2: ::pin_project_lite::__private::AlwaysUnpin<U>,
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Struct<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Struct<T, U> {}
+ #[forbid(unaligned_references, safe_packed_borrows)]
+ fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+ let _ = &this.pinned1;
+ let _ = &this.pinned2;
+ let _ = &this.unpinned1;
+ let _ = &this.unpinned2;
+ }
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+#[project_replace = StructProjReplace]
+struct Struct<T, U> {
+ #[pin]
+ pinned1: T,
+ #[pin]
+ pinned2: T,
+ unpinned1: U,
+ unpinned2: U,
+}
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+enum Enum<T, U> {
+ Struct { pinned: T, unpinned: U },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+enum EnumProj<'__pin, T, U>
+where
+ Enum<T, U>: '__pin,
+{
+ Struct {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned: &'__pin mut (U),
+ },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+enum EnumProjRef<'__pin, T, U>
+where
+ Enum<T, U>: '__pin,
+{
+ Struct {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned: &'__pin (U),
+ },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+enum EnumProjReplace<T, U> {
+ Struct {
+ pinned: ::pin_project_lite::__private::PhantomData<T>,
+ unpinned: U,
+ },
+ Unit,
+}
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ impl<T, U> Enum<T, U> {
+ fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> EnumProj<'__pin, T, U> {
+ unsafe {
+ match self.get_unchecked_mut() {
+ Self::Struct { pinned, unpinned } => EnumProj::Struct {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ },
+ Self::Unit => EnumProj::Unit,
+ }
+ }
+ }
+ fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> EnumProjRef<'__pin, T, U> {
+ unsafe {
+ match self.get_ref() {
+ Self::Struct { pinned, unpinned } => EnumProjRef::Struct {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ },
+ Self::Unit => EnumProjRef::Unit,
+ }
+ }
+ }
+ fn project_replace(
+ self: ::pin_project_lite::__private::Pin<&mut Self>,
+ replacement: Self,
+ ) -> EnumProjReplace<T, U> {
+ unsafe {
+ let __self_ptr: *mut Self = self.get_unchecked_mut();
+ let __guard = ::pin_project_lite::__private::UnsafeOverwriteGuard::new(
+ __self_ptr,
+ replacement,
+ );
+ match &mut *__self_ptr {
+ Self::Struct { pinned, unpinned } => {
+ let result = EnumProjReplace::Struct {
+ pinned: ::pin_project_lite::__private::PhantomData,
+ unpinned: ::pin_project_lite::__private::ptr::read(unpinned),
+ };
+ {
+ (
+ ::pin_project_lite::__private::UnsafeDropInPlaceGuard::new(pinned),
+ (),
+ );
+ }
+ result
+ }
+ Self::Unit => EnumProjReplace::Unit,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ Struct: (T, ::pin_project_lite::__private::AlwaysUnpin<U>),
+ Unit: (),
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Enum<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Enum<T, U> {}
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ #[project_replace = EnumProjReplace]
+ enum Enum<T, U> {
+ Struct {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ },
+ Unit,
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+enum Enum<T, U> {
+ Struct { pinned: T, unpinned: U },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+enum EnumProj<'__pin, T, U>
+where
+ Enum<T, U>: '__pin,
+{
+ Struct {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned: &'__pin mut (U),
+ },
+ Unit,
+}
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ impl<T, U> Enum<T, U> {
+ fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> EnumProj<'__pin, T, U> {
+ unsafe {
+ match self.get_unchecked_mut() {
+ Self::Struct { pinned, unpinned } => EnumProj::Struct {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ },
+ Self::Unit => EnumProj::Unit,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ Struct: (T, ::pin_project_lite::__private::AlwaysUnpin<U>),
+ Unit: (),
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Enum<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Enum<T, U> {}
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ #[project = EnumProj]
+ enum Enum<T, U> {
+ Struct {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ },
+ Unit,
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+enum Enum<T, U> {
+ Struct { pinned: T, unpinned: U },
+ Unit,
+}
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ impl<T, U> Enum<T, U> {}
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ Struct: (T, ::pin_project_lite::__private::AlwaysUnpin<U>),
+ Unit: (),
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Enum<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Enum<T, U> {}
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ enum Enum<T, U> {
+ Struct {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ },
+ Unit,
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+enum Enum<T, U> {
+ Struct { pinned: T, unpinned: U },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+enum EnumProjRef<'__pin, T, U>
+where
+ Enum<T, U>: '__pin,
+{
+ Struct {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned: &'__pin (U),
+ },
+ Unit,
+}
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ impl<T, U> Enum<T, U> {
+ fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> EnumProjRef<'__pin, T, U> {
+ unsafe {
+ match self.get_ref() {
+ Self::Struct { pinned, unpinned } => EnumProjRef::Struct {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ },
+ Self::Unit => EnumProjRef::Unit,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ Struct: (T, ::pin_project_lite::__private::AlwaysUnpin<U>),
+ Unit: (),
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Enum<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Enum<T, U> {}
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ #[project_ref = EnumProjRef]
+ enum Enum<T, U> {
+ Struct {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ },
+ Unit,
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+struct Struct<T, U> {
+ pinned: T,
+ unpinned: U,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+struct StructProj<'__pin, T, U>
+where
+ Struct<T, U>: '__pin,
+{
+ pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned: &'__pin mut (U),
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+struct StructProjRef<'__pin, T, U>
+where
+ Struct<T, U>: '__pin,
+{
+ pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned: &'__pin (U),
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::type_repetition_in_bounds)]
+struct StructProjReplace<T, U> {
+ pinned: ::pin_project_lite::__private::PhantomData<T>,
+ unpinned: U,
+}
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ impl<T, U> Struct<T, U> {
+ fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> StructProj<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_unchecked_mut();
+ StructProj {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> StructProjRef<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_ref();
+ StructProjRef {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ fn project_replace(
+ self: ::pin_project_lite::__private::Pin<&mut Self>,
+ replacement: Self,
+ ) -> StructProjReplace<T, U> {
+ unsafe {
+ let __self_ptr: *mut Self = self.get_unchecked_mut();
+ let __guard = ::pin_project_lite::__private::UnsafeOverwriteGuard::new(
+ __self_ptr,
+ replacement,
+ );
+ let Self { pinned, unpinned } = &mut *__self_ptr;
+ let result = StructProjReplace {
+ pinned: ::pin_project_lite::__private::PhantomData,
+ unpinned: ::pin_project_lite::__private::ptr::read(unpinned),
+ };
+ {
+ (
+ ::pin_project_lite::__private::UnsafeDropInPlaceGuard::new(pinned),
+ (),
+ );
+ }
+ result
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ pinned: T,
+ unpinned: ::pin_project_lite::__private::AlwaysUnpin<U>,
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Struct<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Struct<T, U> {}
+ #[forbid(unaligned_references, safe_packed_borrows)]
+ fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+ let _ = &this.pinned;
+ let _ = &this.unpinned;
+ }
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ #[project = StructProj]
+ #[project_ref = StructProjRef]
+ #[project_replace = StructProjReplace]
+ struct Struct<T, U> {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+struct Struct<T, U> {
+ pinned: T,
+ unpinned: U,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+struct StructProj<'__pin, T, U>
+where
+ Struct<T, U>: '__pin,
+{
+ pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned: &'__pin mut (U),
+}
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ struct ProjectionRef<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned: &'__pin (U),
+ }
+ impl<T, U> Struct<T, U> {
+ fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> StructProj<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_unchecked_mut();
+ StructProj {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> ProjectionRef<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_ref();
+ ProjectionRef {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ pinned: T,
+ unpinned: ::pin_project_lite::__private::AlwaysUnpin<U>,
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Struct<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Struct<T, U> {}
+ #[forbid(unaligned_references, safe_packed_borrows)]
+ fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+ let _ = &this.pinned;
+ let _ = &this.unpinned;
+ }
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ #[project = StructProj]
+ struct Struct<T, U> {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+struct Struct<T, U> {
+ pinned: T,
+ unpinned: U,
+}
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ struct Projection<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned: &'__pin mut (U),
+ }
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ struct ProjectionRef<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned: &'__pin (U),
+ }
+ impl<T, U> Struct<T, U> {
+ fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> Projection<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_unchecked_mut();
+ Projection {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> ProjectionRef<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_ref();
+ ProjectionRef {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ pinned: T,
+ unpinned: ::pin_project_lite::__private::AlwaysUnpin<U>,
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Struct<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Struct<T, U> {}
+ #[forbid(unaligned_references, safe_packed_borrows)]
+ fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+ let _ = &this.pinned;
+ let _ = &this.unpinned;
+ }
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ struct Struct<T, U> {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+struct Struct<T, U> {
+ pinned: T,
+ unpinned: U,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+struct StructProjRef<'__pin, T, U>
+where
+ Struct<T, U>: '__pin,
+{
+ pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned: &'__pin (U),
+}
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ struct Projection<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned: &'__pin mut (U),
+ }
+ impl<T, U> Struct<T, U> {
+ fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> Projection<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_unchecked_mut();
+ Projection {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> StructProjRef<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_ref();
+ StructProjRef {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ pinned: T,
+ unpinned: ::pin_project_lite::__private::AlwaysUnpin<U>,
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Struct<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Struct<T, U> {}
+ #[forbid(unaligned_references, safe_packed_borrows)]
+ fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+ let _ = &this.pinned;
+ let _ = &this.unpinned;
+ }
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ #[project_ref = StructProjRef]
+ struct Struct<T, U> {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+use std::pin::Pin;
+enum Enum<T, U> {
+ Struct { pinned: T, unpinned: U },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+enum EnumProj<'__pin, T, U>
+where
+ Enum<T, U>: '__pin,
+{
+ Struct {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned: &'__pin mut (U),
+ },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+enum EnumProjRef<'__pin, T, U>
+where
+ Enum<T, U>: '__pin,
+{
+ Struct {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned: &'__pin (U),
+ },
+ Unit,
+}
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ impl<T, U> Enum<T, U> {
+ fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> EnumProj<'__pin, T, U> {
+ unsafe {
+ match self.get_unchecked_mut() {
+ Self::Struct { pinned, unpinned } => EnumProj::Struct {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ },
+ Self::Unit => EnumProj::Unit,
+ }
+ }
+ }
+ fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> EnumProjRef<'__pin, T, U> {
+ unsafe {
+ match self.get_ref() {
+ Self::Struct { pinned, unpinned } => EnumProjRef::Struct {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ },
+ Self::Unit => EnumProjRef::Unit,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ Struct: (T, ::pin_project_lite::__private::AlwaysUnpin<U>),
+ Unit: (),
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Enum<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ impl<T, U> ::pin_project_lite::__private::Drop for Enum<T, U> {
+ fn drop(&mut self) {
+ fn __drop_inner<T, U>(this: ::pin_project_lite::__private::Pin<&mut Enum<T, U>>) {
+ fn __drop_inner() {}
+ let _ = this;
+ }
+ let pinned_self: ::pin_project_lite::__private::Pin<&mut Self> =
+ unsafe { ::pin_project_lite::__private::Pin::new_unchecked(self) };
+ __drop_inner(pinned_self);
+ }
+ }
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+use std::pin::Pin;
+
+pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ enum Enum<T, U> {
+ Struct {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ },
+ Unit,
+ }
+ impl<T, U> PinnedDrop for Enum<T, U> {
+ fn drop(this: Pin<&mut Self>) {
+ let _ = this;
+ }
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+use std::pin::Pin;
+struct Struct<T, U> {
+ pinned: T,
+ unpinned: U,
+}
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ struct Projection<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned: &'__pin mut (U),
+ }
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ struct ProjectionRef<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned: &'__pin (U),
+ }
+ impl<T, U> Struct<T, U> {
+ fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> Projection<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_unchecked_mut();
+ Projection {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> ProjectionRef<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_ref();
+ ProjectionRef {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ pinned: T,
+ unpinned: ::pin_project_lite::__private::AlwaysUnpin<U>,
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Struct<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ impl<T, U> ::pin_project_lite::__private::Drop for Struct<T, U> {
+ fn drop(&mut self) {
+ fn __drop_inner<T, U>(this: ::pin_project_lite::__private::Pin<&mut Struct<T, U>>) {
+ fn __drop_inner() {}
+ let _ = this;
+ }
+ let pinned_self: ::pin_project_lite::__private::Pin<&mut Self> =
+ unsafe { ::pin_project_lite::__private::Pin::new_unchecked(self) };
+ __drop_inner(pinned_self);
+ }
+ }
+ #[forbid(unaligned_references, safe_packed_borrows)]
+ fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+ let _ = &this.pinned;
+ let _ = &this.unpinned;
+ }
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+use std::pin::Pin;
+
+pin_project! {
+ struct Struct<T, U> {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ }
+ impl<T, U> PinnedDrop for Struct<T, U> {
+ fn drop(this: Pin<&mut Self>) {
+ let _ = this;
+ }
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+pub enum Enum<T, U> {
+ Struct { pinned: T, unpinned: U },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+pub(crate) enum EnumProj<'__pin, T, U>
+where
+ Enum<T, U>: '__pin,
+{
+ Struct {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ unpinned: &'__pin mut (U),
+ },
+ Unit,
+}
+#[allow(dead_code)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::mut_mut)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::ref_option_ref)]
+#[allow(clippy::type_repetition_in_bounds)]
+pub(crate) enum EnumProjRef<'__pin, T, U>
+where
+ Enum<T, U>: '__pin,
+{
+ Struct {
+ pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ unpinned: &'__pin (U),
+ },
+ Unit,
+}
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ impl<T, U> Enum<T, U> {
+ pub(crate) fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> EnumProj<'__pin, T, U> {
+ unsafe {
+ match self.get_unchecked_mut() {
+ Self::Struct { pinned, unpinned } => EnumProj::Struct {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ },
+ Self::Unit => EnumProj::Unit,
+ }
+ }
+ }
+ pub(crate) fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> EnumProjRef<'__pin, T, U> {
+ unsafe {
+ match self.get_ref() {
+ Self::Struct { pinned, unpinned } => EnumProjRef::Struct {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ },
+ Self::Unit => EnumProjRef::Unit,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ pub struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ Struct: (T, ::pin_project_lite::__private::AlwaysUnpin<U>),
+ Unit: (),
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Enum<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Enum<T, U> {}
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ pub enum Enum<T, U> {
+ Struct {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ },
+ Unit,
+ }
+}
+
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+pub struct Struct<T, U> {
+ pub pinned: T,
+ pub unpinned: U,
+}
+#[allow(explicit_outlives_requirements)]
+#[allow(single_use_lifetimes)]
+#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::redundant_pub_crate)]
+#[allow(clippy::used_underscore_binding)]
+const _: () = {
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ pub(crate) struct Projection<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pub pinned: ::pin_project_lite::__private::Pin<&'__pin mut (T)>,
+ pub unpinned: &'__pin mut (U),
+ }
+ #[allow(dead_code)]
+ #[allow(single_use_lifetimes)]
+ #[allow(clippy::unknown_clippy_lints)]
+ #[allow(clippy::mut_mut)]
+ #[allow(clippy::redundant_pub_crate)]
+ #[allow(clippy::ref_option_ref)]
+ #[allow(clippy::type_repetition_in_bounds)]
+ pub(crate) struct ProjectionRef<'__pin, T, U>
+ where
+ Struct<T, U>: '__pin,
+ {
+ pub pinned: ::pin_project_lite::__private::Pin<&'__pin (T)>,
+ pub unpinned: &'__pin (U),
+ }
+ impl<T, U> Struct<T, U> {
+ pub(crate) fn project<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin mut Self>,
+ ) -> Projection<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_unchecked_mut();
+ Projection {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ pub(crate) fn project_ref<'__pin>(
+ self: ::pin_project_lite::__private::Pin<&'__pin Self>,
+ ) -> ProjectionRef<'__pin, T, U> {
+ unsafe {
+ let Self { pinned, unpinned } = self.get_ref();
+ ProjectionRef {
+ pinned: ::pin_project_lite::__private::Pin::new_unchecked(pinned),
+ unpinned: unpinned,
+ }
+ }
+ }
+ }
+ #[allow(non_snake_case)]
+ pub struct __Origin<'__pin, T, U> {
+ __dummy_lifetime: ::pin_project_lite::__private::PhantomData<&'__pin ()>,
+ pinned: T,
+ unpinned: ::pin_project_lite::__private::AlwaysUnpin<U>,
+ }
+ impl<'__pin, T, U> ::pin_project_lite::__private::Unpin for Struct<T, U> where
+ __Origin<'__pin, T, U>: ::pin_project_lite::__private::Unpin
+ {
+ }
+ trait MustNotImplDrop {}
+ #[allow(clippy::drop_bounds, drop_bounds)]
+ impl<T: ::pin_project_lite::__private::Drop> MustNotImplDrop for T {}
+ impl<T, U> MustNotImplDrop for Struct<T, U> {}
+ #[forbid(unaligned_references, safe_packed_borrows)]
+ fn __assert_not_repr_packed<T, U>(this: &Struct<T, U>) {
+ let _ = &this.pinned;
+ let _ = &this.unpinned;
+ }
+};
+fn main() {}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ pub struct Struct<T, U> {
+ #[pin]
+ pub pinned: T,
+ pub unpinned: U,
+ }
+}
+
+fn main() {}
--- /dev/null
+#![cfg(not(miri))]
+#![warn(rust_2018_idioms, single_use_lifetimes)]
+
+use std::{
+ env,
+ process::{Command, ExitStatus, Stdio},
+};
+
+const PATH: &str = "tests/expand/**/*.rs";
+
+#[rustversion::attr(not(nightly), ignore)]
+#[test]
+fn expandtest() {
+ let is_ci = env::var_os("CI").is_some();
+ let cargo = &*env::var("CARGO").unwrap_or_else(|_| "cargo".into());
+ if !has_command(&[cargo, "expand"]) || !has_command(&[cargo, "fmt"]) {
+ if is_ci {
+ panic!("expandtest requires rustfmt and cargo-expand");
+ }
+ return;
+ }
+
+ let args = &["--all-features"];
+ if is_ci {
+ macrotest::expand_without_refresh_args(PATH, args);
+ } else {
+ env::set_var("MACROTEST", "overwrite");
+ macrotest::expand_args(PATH, args);
+ }
+}
+
+fn has_command(command: &[&str]) -> bool {
+ Command::new(command[0])
+ .args(&command[1..])
+ .arg("--version")
+ .stdin(Stdio::null())
+ .stdout(Stdio::null())
+ .stderr(Stdio::null())
+ .status()
+ .as_ref()
+ .map(ExitStatus::success)
+ .unwrap_or(false)
+}
--- /dev/null
+// default pin_project! is completely safe.
+
+::pin_project_lite::pin_project! {
+ #[derive(Debug)]
+ pub struct DefaultStruct<T, U> {
+ #[pin]
+ pub pinned: T,
+ pub unpinned: U,
+ }
+}
+
+::pin_project_lite::pin_project! {
+ #[project = DefaultStructProj]
+ #[project_ref = DefaultStructProjRef]
+ #[derive(Debug)]
+ pub struct DefaultStructNamed<T, U> {
+ #[pin]
+ pub pinned: T,
+ pub unpinned: U,
+ }
+}
+
+::pin_project_lite::pin_project! {
+ #[project = DefaultEnumProj]
+ #[project_ref = DefaultEnumProjRef]
+ #[derive(Debug)]
+ pub enum DefaultEnum<T, U> {
+ Struct {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ },
+ Unit,
+ }
+}
--- /dev/null
+// Check interoperability with rustc and clippy lints.
+
+#![forbid(unsafe_code)]
+// for old compilers
+#![allow(unknown_lints)]
+#![warn(nonstandard_style, rust_2018_idioms, unused)]
+// Note: This does not guarantee compatibility with forbidding these lints in the future.
+// If rustc adds a new lint, we may not be able to keep this.
+#![forbid(future_incompatible, rust_2018_compatibility, rust_2021_compatibility)]
+// lints forbidden as a part of future_incompatible, rust_2018_compatibility, and rust_2021_compatibility are not included in the list below.
+// elided_lifetimes_in_paths, explicit_outlives_requirements, unused_extern_crates: as a part of rust_2018_idioms
+// unsafe_op_in_unsafe_fn: requires Rust 1.52. and, we don't generate unsafe fn.
+// non_exhaustive_omitted_patterns: unstable
+// unstable_features: no way to generate #![feature(..)] by macros, expect for unstable inner attribute. and this lint is deprecated: https://doc.rust-lang.org/rustc/lints/listing/allowed-by-default.html#unstable-features
+// unused_crate_dependencies, must_not_suspend: unrelated
+// unsafe_code: checked in forbid_unsafe module
+#![warn(
+ box_pointers,
+ deprecated_in_future,
+ fuzzy_provenance_casts,
+ lossy_provenance_casts,
+ macro_use_extern_crate,
+ meta_variable_misuse,
+ missing_abi,
+ missing_copy_implementations,
+ missing_debug_implementations,
+ missing_docs,
+ non_ascii_idents,
+ noop_method_call,
+ single_use_lifetimes,
+ trivial_casts,
+ trivial_numeric_casts,
+ unreachable_pub,
+ unused_import_braces,
+ unused_lifetimes,
+ unused_qualifications,
+ unused_results,
+ variant_size_differences
+)]
+#![warn(clippy::all, clippy::pedantic, clippy::nursery, clippy::restriction)]
+#![allow(clippy::blanket_clippy_restriction_lints)] // this is a test, so enable all restriction lints intentionally.
+#![allow(clippy::exhaustive_structs, clippy::exhaustive_enums, clippy::single_char_lifetime_names)] // TODO
+
+pub mod basic {
+ include!("include/basic.rs");
+}
+
+pub mod box_pointers {
+ use pin_project_lite::pin_project;
+
+ pin_project! {
+ #[derive(Debug)]
+ pub struct Struct {
+ #[pin]
+ pub p: Box<isize>,
+ pub u: Box<isize>,
+ }
+ }
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ #[derive(Debug)]
+ pub enum Enum {
+ Struct {
+ #[pin]
+ p: Box<isize>,
+ u: Box<isize>,
+ },
+ Unit,
+ }
+ }
+}
+
+pub mod explicit_outlives_requirements {
+ use pin_project_lite::pin_project;
+
+ pin_project! {
+ #[derive(Debug)]
+ pub struct Struct<'a, T, U>
+ where
+ T: ?Sized,
+ U: ?Sized,
+ {
+ #[pin]
+ pub pinned: &'a mut T,
+ pub unpinned: &'a mut U,
+ }
+ }
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ #[derive(Debug)]
+ pub enum Enum<'a, T, U>
+ where
+ T: ?Sized,
+ U: ?Sized,
+ {
+ Struct {
+ #[pin]
+ pinned: &'a mut T,
+ unpinned: &'a mut U,
+ },
+ Unit,
+ }
+ }
+}
+
+pub mod variant_size_differences {
+ use pin_project_lite::pin_project;
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ #[allow(missing_debug_implementations, missing_copy_implementations)] // https://github.com/rust-lang/rust/pull/74060
+ #[allow(variant_size_differences)] // for the type itself
+ #[allow(clippy::large_enum_variant)] // for the type itself
+ pub enum Enum {
+ V1 { f: u8 },
+ V2 { f: [u8; 1024] },
+ }
+ }
+}
+
+pub mod clippy_mut_mut {
+ use pin_project_lite::pin_project;
+
+ pin_project! {
+ #[derive(Debug)]
+ pub struct Struct<'a, T, U> {
+ #[pin]
+ pub pinned: &'a mut T,
+ pub unpinned: &'a mut U,
+ }
+ }
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ #[derive(Debug)]
+ pub enum Enum<'a, T, U> {
+ Struct {
+ #[pin]
+ pinned: &'a mut T,
+ unpinned: &'a mut U,
+ },
+ Unit,
+ }
+ }
+}
+
+#[allow(unreachable_pub)]
+mod clippy_redundant_pub_crate {
+ use pin_project_lite::pin_project;
+
+ pin_project! {
+ #[derive(Debug)]
+ pub struct Struct<T, U> {
+ #[pin]
+ pub pinned: T,
+ pub unpinned: U,
+ }
+ }
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ #[derive(Debug)]
+ pub enum Enum<T, U> {
+ Struct {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ },
+ Unit,
+ }
+ }
+}
+
+#[allow(clippy::use_self)]
+pub mod clippy_type_repetition_in_bounds {
+ use pin_project_lite::pin_project;
+
+ pin_project! {
+ #[derive(Debug)]
+ pub struct Struct<T, U>
+ where
+ Struct<T, U>: Sized,
+ {
+ #[pin]
+ pub pinned: T,
+ pub unpinned: U,
+ }
+ }
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ #[derive(Debug)]
+ pub enum Enum<T, U>
+ where
+ Enum<T, U>: Sized,
+ {
+ Struct {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ },
+ Unit,
+ }
+ }
+}
+
+pub mod clippy_used_underscore_binding {
+ use pin_project_lite::pin_project;
+
+ pin_project! {
+ #[derive(Debug)]
+ pub struct Struct<T, U> {
+ #[pin]
+ pub _pinned: T,
+ pub _unpinned: U,
+ }
+ }
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ #[derive(Debug)]
+ pub enum Enum<T, U> {
+ Struct {
+ #[pin]
+ _pinned: T,
+ _unpinned: U,
+ },
+ }
+ }
+}
+
+pub mod clippy_ref_option_ref {
+ use pin_project_lite::pin_project;
+
+ pin_project! {
+ pub struct Struct<'a> {
+ #[pin]
+ pub _pinned: Option<&'a ()>,
+ pub _unpinned: Option<&'a ()>,
+ }
+ }
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ pub enum Enum<'a> {
+ Struct {
+ #[pin]
+ _pinned: Option<&'a ()>,
+ _unpinned: Option<&'a ()>,
+ },
+ }
+ }
+}
--- /dev/null
+#![warn(rust_2018_idioms, single_use_lifetimes)]
+#![allow(dead_code)]
+
+#[macro_use]
+mod auxiliary;
+
+pub mod default {
+ use std::marker::PhantomPinned;
+
+ use pin_project_lite::pin_project;
+
+ struct Inner<T> {
+ f: T,
+ }
+
+ assert_unpin!(Inner<()>);
+ assert_not_unpin!(Inner<PhantomPinned>);
+
+ pin_project! {
+ struct Struct<T, U> {
+ #[pin]
+ f1: Inner<T>,
+ f2: U,
+ }
+ }
+
+ assert_unpin!(Struct<(), ()>);
+ assert_unpin!(Struct<(), PhantomPinned>);
+ assert_not_unpin!(Struct<PhantomPinned, ()>);
+ assert_not_unpin!(Struct<PhantomPinned, PhantomPinned>);
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ enum Enum<T, U> {
+ V1 {
+ #[pin]
+ f1: Inner<T>,
+ f2: U,
+ },
+ }
+ }
+
+ assert_unpin!(Enum<(), ()>);
+ assert_unpin!(Enum<(), PhantomPinned>);
+ assert_not_unpin!(Enum<PhantomPinned, ()>);
+ assert_not_unpin!(Enum<PhantomPinned, PhantomPinned>);
+
+ pin_project! {
+ struct TrivialBounds {
+ #[pin]
+ f: PhantomPinned,
+ }
+ }
+
+ assert_not_unpin!(TrivialBounds);
+
+ pin_project! {
+ struct PinRef<'a, T, U> {
+ #[pin]
+ f1: &'a mut Inner<T>,
+ f2: U,
+ }
+ }
+
+ assert_unpin!(PinRef<'_, PhantomPinned, PhantomPinned>);
+}
--- /dev/null
+#![warn(rust_2018_idioms, single_use_lifetimes)]
+#![allow(dead_code)]
+
+#[macro_use]
+mod auxiliary;
+
+use core::{
+ marker::{PhantomData, PhantomPinned},
+ pin::Pin,
+};
+
+use pin_project_lite::pin_project;
+
+#[test]
+fn projection() {
+ pin_project! {
+ #[project = StructProj]
+ #[project_ref = StructProjRef]
+ #[project_replace = StructProjReplace]
+ #[derive(Default)]
+ struct Struct<T, U> {
+ #[pin]
+ f1: T,
+ f2: U,
+ }
+ }
+
+ let mut s = Struct { f1: 1, f2: 2 };
+ let mut s_orig = Pin::new(&mut s);
+ let s = s_orig.as_mut().project();
+
+ let _: Pin<&mut i32> = s.f1;
+ assert_eq!(*s.f1, 1);
+ let _: &mut i32 = s.f2;
+ assert_eq!(*s.f2, 2);
+
+ assert_eq!(s_orig.as_ref().f1, 1);
+ assert_eq!(s_orig.as_ref().f2, 2);
+
+ let mut s = Struct { f1: 1, f2: 2 };
+ let mut s = Pin::new(&mut s);
+ {
+ let StructProj { f1, f2 } = s.as_mut().project();
+ let _: Pin<&mut i32> = f1;
+ let _: &mut i32 = f2;
+ }
+ {
+ let StructProjRef { f1, f2 } = s.as_ref().project_ref();
+ let _: Pin<&i32> = f1;
+ let _: &i32 = f2;
+ }
+
+ {
+ let StructProjReplace { f1: PhantomData, f2 } =
+ s.as_mut().project_replace(Struct::default());
+ assert_eq!(f2, 2);
+ let StructProj { f1, f2 } = s.project();
+ assert_eq!(*f1, 0);
+ assert_eq!(*f2, 0);
+ }
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ #[project_replace = EnumProjReplace]
+ #[derive(Eq, PartialEq, Debug)]
+ enum Enum<C, D> {
+ Struct {
+ #[pin]
+ f1: C,
+ f2: D,
+ },
+ Unit,
+ }
+ }
+
+ let mut e = Enum::Struct { f1: 1, f2: 2 };
+ let mut e = Pin::new(&mut e);
+
+ match e.as_mut().project() {
+ EnumProj::Struct { f1, f2 } => {
+ let _: Pin<&mut i32> = f1;
+ assert_eq!(*f1, 1);
+ let _: &mut i32 = f2;
+ assert_eq!(*f2, 2);
+ }
+ EnumProj::Unit => unreachable!(),
+ }
+
+ assert_eq!(&*e, &Enum::Struct { f1: 1, f2: 2 });
+
+ if let EnumProj::Struct { f1, f2 } = e.as_mut().project() {
+ let _: Pin<&mut i32> = f1;
+ assert_eq!(*f1, 1);
+ let _: &mut i32 = f2;
+ assert_eq!(*f2, 2);
+ }
+
+ if let EnumProjReplace::Struct { f1: PhantomData, f2 } = e.as_mut().project_replace(Enum::Unit)
+ {
+ assert_eq!(f2, 2);
+ }
+}
+
+#[test]
+fn enum_project_set() {
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ #[derive(Eq, PartialEq, Debug)]
+ enum Enum {
+ V1 { #[pin] f: u8 },
+ V2 { f: bool },
+ }
+ }
+
+ let mut e = Enum::V1 { f: 25 };
+ let mut e_orig = Pin::new(&mut e);
+ let e_proj = e_orig.as_mut().project();
+
+ match e_proj {
+ EnumProj::V1 { f } => {
+ let new_e = Enum::V2 { f: f.as_ref().get_ref() == &25 };
+ e_orig.set(new_e);
+ }
+ EnumProj::V2 { .. } => unreachable!(),
+ }
+
+ assert_eq!(e, Enum::V2 { f: true });
+}
+
+#[test]
+fn where_clause() {
+ pin_project! {
+ struct Struct<T>
+ where
+ T: Copy,
+ {
+ f: T,
+ }
+ }
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ enum Enum<T>
+ where
+ T: Copy,
+ {
+ V { f: T },
+ }
+ }
+}
+
+#[test]
+fn where_clause_and_associated_type_field() {
+ pin_project! {
+ struct Struct1<I>
+ where
+ I: Iterator,
+ {
+ #[pin]
+ f1: I,
+ f2: I::Item,
+ }
+ }
+
+ pin_project! {
+ struct Struct2<I, J>
+ where
+ I: Iterator<Item = J>,
+ {
+ #[pin]
+ f1: I,
+ f2: J,
+ }
+ }
+
+ pin_project! {
+ pub struct Struct3<T>
+ where
+ T: 'static,
+ {
+ f: T,
+ }
+ }
+
+ trait Static: 'static {}
+
+ impl<T> Static for Struct3<T> {}
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ enum Enum<I>
+ where
+ I: Iterator,
+ {
+ V1 { #[pin] f: I },
+ V2 { f: I::Item },
+ }
+ }
+}
+
+#[test]
+fn derive_copy() {
+ pin_project! {
+ #[derive(Clone, Copy)]
+ struct Struct<T> {
+ f: T,
+ }
+ }
+
+ fn is_copy<T: Copy>() {}
+
+ is_copy::<Struct<u8>>();
+}
+
+#[test]
+fn move_out() {
+ struct NotCopy;
+
+ pin_project! {
+ struct Struct {
+ f: NotCopy,
+ }
+ }
+
+ let x = Struct { f: NotCopy };
+ let _val: NotCopy = x.f;
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ enum Enum {
+ V { f: NotCopy },
+ }
+ }
+
+ let x = Enum::V { f: NotCopy };
+ #[allow(clippy::infallible_destructuring_match)]
+ let _val: NotCopy = match x {
+ Enum::V { f } => f,
+ };
+}
+
+#[test]
+fn trait_bounds_on_type_generics() {
+ pin_project! {
+ pub struct Struct1<'a, T: ?Sized> {
+ f: &'a mut T,
+ }
+ }
+
+ pin_project! {
+ pub struct Struct2<'a, T: ::core::fmt::Debug> {
+ f: &'a mut T,
+ }
+ }
+
+ pin_project! {
+ pub struct Struct3<'a, T: core::fmt::Debug> {
+ f: &'a mut T,
+ }
+ }
+
+ // pin_project! {
+ // pub struct Struct4<'a, T: core::fmt::Debug + core::fmt::Display> {
+ // f: &'a mut T,
+ // }
+ // }
+
+ // pin_project! {
+ // pub struct Struct5<'a, T: core::fmt::Debug + ?Sized> {
+ // f: &'a mut T,
+ // }
+ // }
+
+ pin_project! {
+ pub struct Struct6<'a, T: core::fmt::Debug = [u8; 16]> {
+ f: &'a mut T,
+ }
+ }
+
+ let _: Struct6<'_> = Struct6 { f: &mut [0_u8; 16] };
+
+ pin_project! {
+ pub struct Struct7<T: 'static> {
+ f: T,
+ }
+ }
+
+ trait Static: 'static {}
+
+ impl<T> Static for Struct7<T> {}
+
+ pin_project! {
+ pub struct Struct8<'a, 'b: 'a> {
+ f1: &'a u8,
+ f2: &'b u8,
+ }
+ }
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ enum Enum<'a, T: ?Sized> {
+ V { f: &'a mut T },
+ }
+ }
+}
+
+#[test]
+fn private_type_in_public_type() {
+ pin_project! {
+ pub struct PublicStruct<T> {
+ #[pin]
+ inner: PrivateStruct<T>,
+ }
+ }
+
+ struct PrivateStruct<T>(T);
+}
+
+#[allow(clippy::needless_lifetimes)]
+#[test]
+fn lifetime_project() {
+ pin_project! {
+ struct Struct1<T, U> {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ }
+ }
+
+ pin_project! {
+ struct Struct2<'a, T, U> {
+ #[pin]
+ pinned: &'a T,
+ unpinned: U,
+ }
+ }
+
+ pin_project! {
+ #[project = EnumProj]
+ #[project_ref = EnumProjRef]
+ enum Enum<T, U> {
+ V {
+ #[pin]
+ pinned: T,
+ unpinned: U,
+ },
+ }
+ }
+
+ impl<T, U> Struct1<T, U> {
+ fn get_pin_ref<'a>(self: Pin<&'a Self>) -> Pin<&'a T> {
+ self.project_ref().pinned
+ }
+ fn get_pin_mut<'a>(self: Pin<&'a mut Self>) -> Pin<&'a mut T> {
+ self.project().pinned
+ }
+ fn get_pin_ref_elided(self: Pin<&Self>) -> Pin<&T> {
+ self.project_ref().pinned
+ }
+ fn get_pin_mut_elided(self: Pin<&mut Self>) -> Pin<&mut T> {
+ self.project().pinned
+ }
+ }
+
+ impl<'b, T, U> Struct2<'b, T, U> {
+ fn get_pin_ref<'a>(self: Pin<&'a Self>) -> Pin<&'a &'b T> {
+ self.project_ref().pinned
+ }
+ fn get_pin_mut<'a>(self: Pin<&'a mut Self>) -> Pin<&'a mut &'b T> {
+ self.project().pinned
+ }
+ fn get_pin_ref_elided(self: Pin<&Self>) -> Pin<&&'b T> {
+ self.project_ref().pinned
+ }
+ fn get_pin_mut_elided(self: Pin<&mut Self>) -> Pin<&mut &'b T> {
+ self.project().pinned
+ }
+ }
+
+ impl<T, U> Enum<T, U> {
+ fn get_pin_ref<'a>(self: Pin<&'a Self>) -> Pin<&'a T> {
+ match self.project_ref() {
+ EnumProjRef::V { pinned, .. } => pinned,
+ }
+ }
+ fn get_pin_mut<'a>(self: Pin<&'a mut Self>) -> Pin<&'a mut T> {
+ match self.project() {
+ EnumProj::V { pinned, .. } => pinned,
+ }
+ }
+ fn get_pin_ref_elided(self: Pin<&Self>) -> Pin<&T> {
+ match self.project_ref() {
+ EnumProjRef::V { pinned, .. } => pinned,
+ }
+ }
+ fn get_pin_mut_elided(self: Pin<&mut Self>) -> Pin<&mut T> {
+ match self.project() {
+ EnumProj::V { pinned, .. } => pinned,
+ }
+ }
+ }
+}
+
+mod visibility {
+ use pin_project_lite::pin_project;
+
+ pin_project! {
+ pub(crate) struct S {
+ pub f: u8,
+ }
+ }
+}
+
+#[test]
+fn visibility() {
+ let mut x = visibility::S { f: 0 };
+ let x = Pin::new(&mut x);
+ let y = x.as_ref().project_ref();
+ let _: &u8 = y.f;
+ let y = x.project();
+ let _: &mut u8 = y.f;
+}
+
+#[test]
+fn trivial_bounds() {
+ pin_project! {
+ pub struct NoGenerics {
+ #[pin]
+ f: PhantomPinned,
+ }
+ }
+
+ assert_not_unpin!(NoGenerics);
+}
+
+#[test]
+fn dst() {
+ pin_project! {
+ pub struct Struct1<T: ?Sized> {
+ f: T,
+ }
+ }
+
+ let mut x = Struct1 { f: 0_u8 };
+ let x: Pin<&mut Struct1<dyn core::fmt::Debug>> = Pin::new(&mut x as _);
+ let _: &mut (dyn core::fmt::Debug) = x.project().f;
+
+ pin_project! {
+ pub struct Struct2<T: ?Sized> {
+ #[pin]
+ f: T,
+ }
+ }
+
+ let mut x = Struct2 { f: 0_u8 };
+ let x: Pin<&mut Struct2<dyn core::fmt::Debug + Unpin>> = Pin::new(&mut x as _);
+ let _: Pin<&mut (dyn core::fmt::Debug + Unpin)> = x.project().f;
+
+ pin_project! {
+ struct Struct3<T>
+ where
+ T: ?Sized,
+ {
+ f: T,
+ }
+ }
+
+ pin_project! {
+ struct Struct4<T>
+ where
+ T: ?Sized,
+ {
+ #[pin]
+ f: T,
+ }
+ }
+
+ pin_project! {
+ struct Struct11<'a, T: ?Sized, U: ?Sized> {
+ f1: &'a mut T,
+ f2: U,
+ }
+ }
+}
+
+#[test]
+fn dyn_type() {
+ pin_project! {
+ struct Struct1 {
+ f: dyn core::fmt::Debug,
+ }
+ }
+
+ pin_project! {
+ struct Struct2 {
+ #[pin]
+ f: dyn core::fmt::Debug,
+ }
+ }
+
+ pin_project! {
+ struct Struct3 {
+ f: dyn core::fmt::Debug + Send,
+ }
+ }
+
+ pin_project! {
+ struct Struct4 {
+ #[pin]
+ f: dyn core::fmt::Debug + Send,
+ }
+ }
+}
+
+#[test]
+fn no_infer_outlives() {
+ trait Trait<X> {
+ type Y;
+ }
+
+ struct Struct1<A>(A);
+
+ impl<X, T> Trait<X> for Struct1<T> {
+ type Y = Option<T>;
+ }
+
+ pin_project! {
+ struct Struct2<A, B> {
+ _f: <Struct1<A> as Trait<B>>::Y,
+ }
+ }
+}
+
+// https://github.com/taiki-e/pin-project-lite/issues/31
+#[test]
+fn trailing_comma() {
+ pub trait T {}
+
+ pin_project! {
+ pub struct S1<
+ A: T,
+ B: T,
+ > {
+ f: (A, B),
+ }
+ }
+
+ pin_project! {
+ pub struct S2<
+ A,
+ B,
+ >
+ where
+ A: T,
+ B: T,
+ {
+ f: (A, B),
+ }
+ }
+
+ pin_project! {
+ #[allow(explicit_outlives_requirements)]
+ pub struct S3<
+ 'a,
+ A: 'a,
+ B: 'a,
+ > {
+ f: &'a (A, B),
+ }
+ }
+
+ // pin_project! {
+ // pub struct S4<
+ // 'a,
+ // 'b: 'a, // <-----
+ // > {
+ // f: &'a &'b (),
+ // }
+ // }
+}
+
+#[test]
+fn attrs() {
+ pin_project! {
+ /// dox1
+ #[derive(Clone)]
+ #[project = StructProj]
+ #[project_ref = StructProjRef]
+ /// dox2
+ #[derive(Debug)]
+ /// dox3
+ struct Struct {
+ // TODO
+ // /// dox4
+ f: ()
+ }
+ }
+
+ pin_project! {
+ #[project = Enum1Proj]
+ #[project_ref = Enum1ProjRef]
+ enum Enum1 {
+ #[cfg(not(any()))]
+ V {
+ f: ()
+ },
+ }
+ }
+
+ pin_project! {
+ /// dox1
+ #[derive(Clone)]
+ #[project = Enum2Proj]
+ #[project_ref = Enum2ProjRef]
+ /// dox2
+ #[derive(Debug)]
+ /// dox3
+ enum Enum2 {
+ /// dox4
+ V1 {
+ // TODO
+ // /// dox5
+ f: ()
+ },
+ /// dox6
+ V2,
+ }
+ }
+}
+
+#[test]
+fn pinned_drop() {
+ pin_project! {
+ pub struct Struct1<'a> {
+ was_dropped: &'a mut bool,
+ #[pin]
+ field: u8,
+ }
+ impl PinnedDrop for Struct1<'_> {
+ fn drop(this: Pin<&mut Self>) {
+ **this.project().was_dropped = true;
+ }
+ }
+ }
+
+ let mut was_dropped = false;
+ drop(Struct1 { was_dropped: &mut was_dropped, field: 42 });
+ assert!(was_dropped);
+
+ pin_project! {
+ pub struct Struct2<'a> {
+ was_dropped: &'a mut bool,
+ #[pin]
+ field: u8,
+ }
+ impl PinnedDrop for Struct2<'_> {
+ fn drop(mut this: Pin<&mut Self>) {
+ **this.as_mut().project().was_dropped = true;
+ }
+ }
+ }
+
+ trait Service<Request> {
+ type Error;
+ }
+
+ pin_project! {
+ struct Struct3<'a, T, Request>
+ where
+ T: Service<Request>,
+ T::Error: std::error::Error,
+ {
+ was_dropped: &'a mut bool,
+ #[pin]
+ field: T,
+ req: Request,
+ }
+
+ impl<T, Request> PinnedDrop for Struct3<'_, T, Request>
+ where
+ T: Service<Request>,
+ T::Error: std::error::Error,
+ {
+ fn drop(mut this: Pin<&mut Self>) {
+ **this.as_mut().project().was_dropped = true;
+ }
+ }
+ }
+}
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! { //~ ERROR E0119
+ struct Foo<T, U> {
+ #[pin]
+ future: T,
+ field: U,
+ }
+}
+
+impl<T, U> Drop for Foo<T, U> {
+ fn drop(&mut self) {}
+}
+
+fn main() {}
--- /dev/null
+error[E0119]: conflicting implementations of trait `_::MustNotImplDrop` for type `Foo<_, _>`
+ --> tests/ui/pin_project/conflict-drop.rs:3:1
+ |
+3 | / pin_project! { //~ ERROR E0119
+4 | | struct Foo<T, U> {
+5 | | #[pin]
+6 | | future: T,
+7 | | field: U,
+8 | | }
+9 | | }
+ | | ^
+ | | |
+ | |_first implementation here
+ | conflicting implementation for `Foo<_, _>`
+ |
+ = note: this error originates in the macro `$crate::__pin_project_make_drop_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
--- /dev/null
+use pin_project_lite::pin_project;
+
+// The same implementation.
+
+pin_project! { //~ ERROR E0119
+ struct Foo<T, U> {
+ #[pin]
+ future: T,
+ field: U,
+ }
+}
+
+// conflicting implementations
+impl<T, U> Unpin for Foo<T, U> where T: Unpin {} // Conditional Unpin impl
+
+// The implementation that under different conditions.
+
+pin_project! { //~ ERROR E0119
+ struct Bar<T, U> {
+ #[pin]
+ future: T,
+ field: U,
+ }
+}
+
+// conflicting implementations
+impl<T, U> Unpin for Bar<T, U> {} // Non-conditional Unpin impl
+
+pin_project! { //~ ERROR E0119
+ struct Baz<T, U> {
+ #[pin]
+ future: T,
+ field: U,
+ }
+}
+
+// conflicting implementations
+impl<T: Unpin, U: Unpin> Unpin for Baz<T, U> {} // Conditional Unpin impl
+
+fn main() {}
--- /dev/null
+error[E0119]: conflicting implementations of trait `std::marker::Unpin` for type `Foo<_, _>`
+ --> tests/ui/pin_project/conflict-unpin.rs:5:1
+ |
+5 | / pin_project! { //~ ERROR E0119
+6 | | struct Foo<T, U> {
+7 | | #[pin]
+8 | | future: T,
+9 | | field: U,
+10 | | }
+11 | | }
+ | |_^ conflicting implementation for `Foo<_, _>`
+...
+14 | impl<T, U> Unpin for Foo<T, U> where T: Unpin {} // Conditional Unpin impl
+ | --------------------------------------------- first implementation here
+ |
+ = note: this error originates in the macro `$crate::__pin_project_make_unpin_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0119]: conflicting implementations of trait `std::marker::Unpin` for type `Bar<_, _>`
+ --> tests/ui/pin_project/conflict-unpin.rs:18:1
+ |
+18 | / pin_project! { //~ ERROR E0119
+19 | | struct Bar<T, U> {
+20 | | #[pin]
+21 | | future: T,
+22 | | field: U,
+23 | | }
+24 | | }
+ | |_^ conflicting implementation for `Bar<_, _>`
+...
+27 | impl<T, U> Unpin for Bar<T, U> {} // Non-conditional Unpin impl
+ | ------------------------------ first implementation here
+ |
+ = note: this error originates in the macro `$crate::__pin_project_make_unpin_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0119]: conflicting implementations of trait `std::marker::Unpin` for type `Baz<_, _>`
+ --> tests/ui/pin_project/conflict-unpin.rs:29:1
+ |
+29 | / pin_project! { //~ ERROR E0119
+30 | | struct Baz<T, U> {
+31 | | #[pin]
+32 | | future: T,
+33 | | field: U,
+34 | | }
+35 | | }
+ | |_^ conflicting implementation for `Baz<_, _>`
+...
+38 | impl<T: Unpin, U: Unpin> Unpin for Baz<T, U> {} // Conditional Unpin impl
+ | -------------------------------------------- first implementation here
+ |
+ = note: this error originates in the macro `$crate::__pin_project_make_unpin_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ struct Generics1<T: 'static : Sized> { //~ ERROR no rules expected the token `:`
+ field: T,
+ }
+}
+
+pin_project! {
+ struct Generics2<T: 'static : ?Sized> { //~ ERROR no rules expected the token `:`
+ field: T,
+ }
+}
+
+pin_project! {
+ struct Generics3<T: Sized : 'static> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+ field: T,
+ }
+}
+
+pin_project! {
+ struct Generics4<T: ?Sized : 'static> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+ field: T,
+ }
+}
+
+pin_project! {
+ struct Generics5<T: Sized : ?Sized> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+ field: T,
+ }
+}
+
+pin_project! {
+ struct Generics6<T: ?Sized : Sized> { //~ ERROR no rules expected the token `Sized`
+ field: T,
+ }
+}
+
+pin_project! {
+ struct WhereClause1<T>
+ where
+ T: 'static : Sized //~ ERROR no rules expected the token `:`
+ {
+ field: T,
+ }
+}
+
+pin_project! {
+ struct WhereClause2<T>
+ where
+ T: 'static : ?Sized //~ ERROR no rules expected the token `:`
+ {
+ field: T,
+ }
+}
+
+pin_project! {
+ struct WhereClause3<T>
+ where
+ T: Sized : 'static //~ ERROR expected `where`, or `{` after struct name, found `:`
+ {
+ field: T,
+ }
+}
+
+pin_project! {
+ struct WhereClause4<T>
+ where
+ T: ?Sized : 'static //~ ERROR expected `where`, or `{` after struct name, found `:`
+ {
+ field: T,
+ }
+}
+
+pin_project! {
+ struct WhereClause5<T>
+ where
+ T: Sized : ?Sized //~ ERROR expected `where`, or `{` after struct name, found `:`
+ {
+ field: T,
+ }
+}
+
+pin_project! {
+ struct WhereClause6<T>
+ where
+ T: ?Sized : Sized //~ ERROR no rules expected the token `Sized`
+ {
+ field: T,
+ }
+}
+
+fn main() {}
--- /dev/null
+error: no rules expected the token `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:4:33
+ |
+4 | struct Generics1<T: 'static : Sized> { //~ ERROR no rules expected the token `:`
+ | ^ no rules expected this token in macro call
+
+error: no rules expected the token `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:10:33
+ |
+10 | struct Generics2<T: 'static : ?Sized> { //~ ERROR no rules expected the token `:`
+ | ^ no rules expected this token in macro call
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:15:1
+ |
+15 | / pin_project! {
+16 | | struct Generics3<T: Sized : 'static> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+17 | | field: T,
+18 | | }
+19 | | }
+ | | ^
+ | | |
+ | | expected one of `+`, `,`, `=`, or `>`
+ | |_unexpected token
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:15:1
+ |
+15 | / pin_project! {
+16 | | struct Generics3<T: Sized : 'static> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+17 | | field: T,
+18 | | }
+19 | | }
+ | | ^
+ | | |
+ | |_expected one of `+`, `,`, `=`, or `>`
+ | unexpected token
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:15:1
+ |
+15 | / pin_project! {
+16 | | struct Generics3<T: Sized : 'static> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+17 | | field: T,
+18 | | }
+19 | | }
+ | | ^
+ | | |
+ | | expected one of `+`, `,`, `=`, or `>`
+ | |_unexpected token
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:15:1
+ |
+15 | / pin_project! {
+16 | | struct Generics3<T: Sized : 'static> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+17 | | field: T,
+18 | | }
+19 | | }
+ | | ^
+ | | |
+ | | expected one of `+`, `,`, `=`, or `>`
+ | |_unexpected token
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:21:1
+ |
+21 | / pin_project! {
+22 | | struct Generics4<T: ?Sized : 'static> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+23 | | field: T,
+24 | | }
+25 | | }
+ | | ^
+ | | |
+ | | expected one of `+`, `,`, `=`, or `>`
+ | |_unexpected token
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:21:1
+ |
+21 | / pin_project! {
+22 | | struct Generics4<T: ?Sized : 'static> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+23 | | field: T,
+24 | | }
+25 | | }
+ | | ^
+ | | |
+ | |_expected one of `+`, `,`, `=`, or `>`
+ | unexpected token
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:21:1
+ |
+21 | / pin_project! {
+22 | | struct Generics4<T: ?Sized : 'static> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+23 | | field: T,
+24 | | }
+25 | | }
+ | | ^
+ | | |
+ | | expected one of `+`, `,`, `=`, or `>`
+ | |_unexpected token
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:21:1
+ |
+21 | / pin_project! {
+22 | | struct Generics4<T: ?Sized : 'static> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+23 | | field: T,
+24 | | }
+25 | | }
+ | | ^
+ | | |
+ | | expected one of `+`, `,`, `=`, or `>`
+ | |_unexpected token
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:27:1
+ |
+27 | / pin_project! {
+28 | | struct Generics5<T: Sized : ?Sized> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+29 | | field: T,
+30 | | }
+31 | | }
+ | | ^
+ | | |
+ | | expected one of `+`, `,`, `=`, or `>`
+ | |_unexpected token
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:27:1
+ |
+27 | / pin_project! {
+28 | | struct Generics5<T: Sized : ?Sized> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+29 | | field: T,
+30 | | }
+31 | | }
+ | | ^
+ | | |
+ | |_expected one of `+`, `,`, `=`, or `>`
+ | unexpected token
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:27:1
+ |
+27 | / pin_project! {
+28 | | struct Generics5<T: Sized : ?Sized> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+29 | | field: T,
+30 | | }
+31 | | }
+ | | ^
+ | | |
+ | | expected one of `+`, `,`, `=`, or `>`
+ | |_unexpected token
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, `=`, or `>`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:27:1
+ |
+27 | / pin_project! {
+28 | | struct Generics5<T: Sized : ?Sized> { //~ ERROR expected one of `+`, `,`, `=`, or `>`, found `:`
+29 | | field: T,
+30 | | }
+31 | | }
+ | | ^
+ | | |
+ | | expected one of `+`, `,`, `=`, or `>`
+ | |_unexpected token
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: no rules expected the token `Sized`
+ --> tests/ui/pin_project/invalid-bounds.rs:34:34
+ |
+34 | struct Generics6<T: ?Sized : Sized> { //~ ERROR no rules expected the token `Sized`
+ | ^^^^^ no rules expected this token in macro call
+
+error: no rules expected the token `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:42:20
+ |
+42 | T: 'static : Sized //~ ERROR no rules expected the token `:`
+ | ^ no rules expected this token in macro call
+
+error: no rules expected the token `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:51:20
+ |
+51 | T: 'static : ?Sized //~ ERROR no rules expected the token `:`
+ | ^ no rules expected this token in macro call
+
+error: expected `{` after struct name, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:57:1
+ |
+57 | / pin_project! {
+58 | | struct WhereClause3<T>
+59 | | where
+60 | | T: Sized : 'static //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+63 | | }
+64 | | }
+ | | ^
+ | | |
+ | |_expected `{` after struct name
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, or `{`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:57:1
+ |
+57 | / pin_project! {
+58 | | struct WhereClause3<T>
+59 | | where
+60 | | T: Sized : 'static //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+63 | | }
+64 | | }
+ | | ^
+ | | |
+ | |_expected one of `+`, `,`, or `{`
+ | unexpected token
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected `{` after struct name, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:57:1
+ |
+57 | / pin_project! {
+58 | | struct WhereClause3<T>
+59 | | where
+60 | | T: Sized : 'static //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+63 | | }
+64 | | }
+ | | ^
+ | | |
+ | |_expected `{` after struct name
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected `{` after struct name, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:57:1
+ |
+57 | / pin_project! {
+58 | | struct WhereClause3<T>
+59 | | where
+60 | | T: Sized : 'static //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+63 | | }
+64 | | }
+ | | ^
+ | | |
+ | |_expected `{` after struct name
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected `{` after struct name, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:66:1
+ |
+66 | / pin_project! {
+67 | | struct WhereClause4<T>
+68 | | where
+69 | | T: ?Sized : 'static //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+72 | | }
+73 | | }
+ | | ^
+ | | |
+ | |_expected `{` after struct name
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, or `{`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:66:1
+ |
+66 | / pin_project! {
+67 | | struct WhereClause4<T>
+68 | | where
+69 | | T: ?Sized : 'static //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+72 | | }
+73 | | }
+ | | ^
+ | | |
+ | |_expected one of `+`, `,`, or `{`
+ | unexpected token
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected `{` after struct name, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:66:1
+ |
+66 | / pin_project! {
+67 | | struct WhereClause4<T>
+68 | | where
+69 | | T: ?Sized : 'static //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+72 | | }
+73 | | }
+ | | ^
+ | | |
+ | |_expected `{` after struct name
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected `{` after struct name, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:66:1
+ |
+66 | / pin_project! {
+67 | | struct WhereClause4<T>
+68 | | where
+69 | | T: ?Sized : 'static //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+72 | | }
+73 | | }
+ | | ^
+ | | |
+ | |_expected `{` after struct name
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected `{` after struct name, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:75:1
+ |
+75 | / pin_project! {
+76 | | struct WhereClause5<T>
+77 | | where
+78 | | T: Sized : ?Sized //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+81 | | }
+82 | | }
+ | | ^
+ | | |
+ | |_expected `{` after struct name
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected one of `+`, `,`, or `{`, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:75:1
+ |
+75 | / pin_project! {
+76 | | struct WhereClause5<T>
+77 | | where
+78 | | T: Sized : ?Sized //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+81 | | }
+82 | | }
+ | | ^
+ | | |
+ | |_expected one of `+`, `,`, or `{`
+ | unexpected token
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected `{` after struct name, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:75:1
+ |
+75 | / pin_project! {
+76 | | struct WhereClause5<T>
+77 | | where
+78 | | T: Sized : ?Sized //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+81 | | }
+82 | | }
+ | | ^
+ | | |
+ | |_expected `{` after struct name
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected `{` after struct name, found `:`
+ --> tests/ui/pin_project/invalid-bounds.rs:75:1
+ |
+75 | / pin_project! {
+76 | | struct WhereClause5<T>
+77 | | where
+78 | | T: Sized : ?Sized //~ ERROR expected `where`, or `{` after struct name, found `:`
+... |
+81 | | }
+82 | | }
+ | | ^
+ | | |
+ | |_expected `{` after struct name
+ | in this macro invocation
+ |
+ = note: this error originates in the macro `$crate::__pin_project_parse_generics` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: no rules expected the token `Sized`
+ --> tests/ui/pin_project/invalid-bounds.rs:87:21
+ |
+87 | T: ?Sized : Sized //~ ERROR no rules expected the token `Sized`
+ | ^^^^^ no rules expected this token in macro call
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ struct A<T> {
+ #[pin()] //~ ERROR no rules expected the token `(`
+ pinned: T,
+ }
+}
+
+pin_project! {
+ #[pin] //~ ERROR cannot find attribute `pin` in this scope
+ struct B<T> {
+ pinned: T,
+ }
+}
+
+pin_project! {
+ struct C<T> {
+ #[pin]
+ #[pin] //~ ERROR no rules expected the token `#`
+ pinned: T,
+ }
+}
+
+fn main() {}
--- /dev/null
+error: no rules expected the token `struct`
+ --> tests/ui/pin_project/invalid.rs:3:1
+ |
+3 | / pin_project! {
+4 | | struct A<T> {
+5 | | #[pin()] //~ ERROR no rules expected the token `(`
+6 | | pinned: T,
+7 | | }
+8 | | }
+ | |_^ no rules expected this token in macro call
+ |
+ = note: this error originates in the macro `$crate::__pin_project_expand` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: no rules expected the token `struct`
+ --> tests/ui/pin_project/invalid.rs:3:1
+ |
+3 | / pin_project! {
+4 | | struct A<T> {
+5 | | #[pin()] //~ ERROR no rules expected the token `(`
+6 | | pinned: T,
+7 | | }
+8 | | }
+ | |_^ no rules expected this token in macro call
+ |
+ = note: this error originates in the macro `$crate::__pin_project_expand` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: no rules expected the token `struct`
+ --> tests/ui/pin_project/invalid.rs:17:1
+ |
+17 | / pin_project! {
+18 | | struct C<T> {
+19 | | #[pin]
+20 | | #[pin] //~ ERROR no rules expected the token `#`
+21 | | pinned: T,
+22 | | }
+23 | | }
+ | |_^ no rules expected this token in macro call
+ |
+ = note: this error originates in the macro `$crate::__pin_project_expand` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: no rules expected the token `struct`
+ --> tests/ui/pin_project/invalid.rs:17:1
+ |
+17 | / pin_project! {
+18 | | struct C<T> {
+19 | | #[pin]
+20 | | #[pin] //~ ERROR no rules expected the token `#`
+21 | | pinned: T,
+22 | | }
+23 | | }
+ | |_^ no rules expected this token in macro call
+ |
+ = note: this error originates in the macro `$crate::__pin_project_expand` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: cannot find attribute `pin` in this scope
+ --> tests/ui/pin_project/invalid.rs:11:7
+ |
+11 | #[pin] //~ ERROR cannot find attribute `pin` in this scope
+ | ^^^
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! { //~ ERROR E0263,E0496
+ pub struct Foo<'__pin, T> {
+ #[pin]
+ field: &'__pin mut T,
+ }
+}
+
+fn main() {}
--- /dev/null
+error[E0263]: lifetime name `'__pin` declared twice in the same scope
+ --> tests/ui/pin_project/overlapping_lifetime_names.rs:4:20
+ |
+3 | / pin_project! { //~ ERROR E0263,E0496
+4 | | pub struct Foo<'__pin, T> {
+ | | ^^^^^^ declared twice
+5 | | #[pin]
+6 | | field: &'__pin mut T,
+7 | | }
+8 | | }
+ | |_- previous declaration here
+
+error[E0263]: lifetime name `'__pin` declared twice in the same scope
+ --> tests/ui/pin_project/overlapping_lifetime_names.rs:4:20
+ |
+3 | / pin_project! { //~ ERROR E0263,E0496
+4 | | pub struct Foo<'__pin, T> {
+ | | ^^^^^^ declared twice
+5 | | #[pin]
+6 | | field: &'__pin mut T,
+7 | | }
+8 | | }
+ | |_- previous declaration here
+
+error[E0263]: lifetime name `'__pin` declared twice in the same scope
+ --> tests/ui/pin_project/overlapping_lifetime_names.rs:4:20
+ |
+3 | / pin_project! { //~ ERROR E0263,E0496
+4 | | pub struct Foo<'__pin, T> {
+ | | ^^^^^^ declared twice
+5 | | #[pin]
+6 | | field: &'__pin mut T,
+7 | | }
+8 | | }
+ | |_- previous declaration here
+
+error[E0496]: lifetime name `'__pin` shadows a lifetime name that is already in scope
+ --> tests/ui/pin_project/overlapping_lifetime_names.rs:3:1
+ |
+3 | / pin_project! { //~ ERROR E0263,E0496
+4 | | pub struct Foo<'__pin, T> {
+ | | ------ first declared here
+5 | | #[pin]
+6 | | field: &'__pin mut T,
+7 | | }
+8 | | }
+ | |_^ lifetime `'__pin` already in scope
+ |
+ = note: this error originates in the macro `$crate::__pin_project_struct_make_proj_method` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0496]: lifetime name `'__pin` shadows a lifetime name that is already in scope
+ --> tests/ui/pin_project/overlapping_lifetime_names.rs:3:1
+ |
+3 | / pin_project! { //~ ERROR E0263,E0496
+4 | | pub struct Foo<'__pin, T> {
+ | | ------ first declared here
+5 | | #[pin]
+6 | | field: &'__pin mut T,
+7 | | }
+8 | | }
+ | |_^ lifetime `'__pin` already in scope
+ |
+ = note: this error originates in the macro `$crate::__pin_project_struct_make_proj_method` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0263]: lifetime name `'__pin` declared twice in the same scope
+ --> tests/ui/pin_project/overlapping_lifetime_names.rs:4:20
+ |
+3 | / pin_project! { //~ ERROR E0263,E0496
+4 | | pub struct Foo<'__pin, T> {
+ | | ^^^^^^ declared twice
+5 | | #[pin]
+6 | | field: &'__pin mut T,
+7 | | }
+8 | | }
+ | |_- previous declaration here
--- /dev/null
+use std::marker::PhantomPinned;
+
+use pin_project_lite::pin_project;
+
+pin_project! {
+ struct Foo<T> {
+ #[pin]
+ inner: T,
+ }
+}
+
+struct __Origin {}
+
+impl Unpin for __Origin {}
+
+fn is_unpin<T: Unpin>() {}
+
+fn main() {
+ is_unpin::<Foo<PhantomPinned>>(); //~ ERROR E0277
+}
--- /dev/null
+error[E0277]: `PhantomPinned` cannot be unpinned
+ --> tests/ui/pin_project/overlapping_unpin_struct.rs:19:5
+ |
+19 | is_unpin::<Foo<PhantomPinned>>(); //~ ERROR E0277
+ | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ within `_::__Origin<'_, PhantomPinned>`, the trait `Unpin` is not implemented for `PhantomPinned`
+ |
+ = note: consider using `Box::pin`
+note: required because it appears within the type `_::__Origin<'_, PhantomPinned>`
+ --> tests/ui/pin_project/overlapping_unpin_struct.rs:5:1
+ |
+5 | / pin_project! {
+6 | | struct Foo<T> {
+7 | | #[pin]
+8 | | inner: T,
+9 | | }
+10 | | }
+ | |_^
+note: required because of the requirements on the impl of `Unpin` for `Foo<PhantomPinned>`
+ --> tests/ui/pin_project/overlapping_unpin_struct.rs:5:1
+ |
+5 | / pin_project! {
+6 | | struct Foo<T> {
+7 | | #[pin]
+8 | | inner: T,
+9 | | }
+10 | | }
+ | |_^
+note: required by a bound in `is_unpin`
+ --> tests/ui/pin_project/overlapping_unpin_struct.rs:16:16
+ |
+16 | fn is_unpin<T: Unpin>() {}
+ | ^^^^^ required by this bound in `is_unpin`
+ = note: this error originates in the macro `$crate::__pin_project_make_unpin_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
--- /dev/null
+#![allow(unaligned_references)]
+
+use pin_project_lite::pin_project;
+
+pin_project! { //~ ERROR reference to packed field is unaligned
+ #[repr(packed, C)]
+ struct Packed {
+ #[pin]
+ field: u16,
+ }
+}
+
+pin_project! { //~ ERROR reference to packed field is unaligned
+ #[repr(packed(2))]
+ struct PackedN {
+ #[pin]
+ field: u32,
+ }
+}
+
+fn main() {}
--- /dev/null
+error: reference to packed field is unaligned
+ --> tests/ui/pin_project/packed.rs:5:1
+ |
+5 | / pin_project! { //~ ERROR reference to packed field is unaligned
+6 | | #[repr(packed, C)]
+7 | | struct Packed {
+8 | | #[pin]
+9 | | field: u16,
+10 | | }
+11 | | }
+ | |_^
+ |
+note: the lint level is defined here
+ --> tests/ui/pin_project/packed.rs:5:1
+ |
+5 | / pin_project! { //~ ERROR reference to packed field is unaligned
+6 | | #[repr(packed, C)]
+7 | | struct Packed {
+8 | | #[pin]
+9 | | field: u16,
+10 | | }
+11 | | }
+ | |_^
+ = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+ = note: for more information, see issue #82523 <https://github.com/rust-lang/rust/issues/82523>
+ = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
+ = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
+ = note: this error originates in the macro `$crate::__pin_project_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: reference to packed field is unaligned
+ --> tests/ui/pin_project/packed.rs:13:1
+ |
+13 | / pin_project! { //~ ERROR reference to packed field is unaligned
+14 | | #[repr(packed(2))]
+15 | | struct PackedN {
+16 | | #[pin]
+17 | | field: u32,
+18 | | }
+19 | | }
+ | |_^
+ |
+note: the lint level is defined here
+ --> tests/ui/pin_project/packed.rs:13:1
+ |
+13 | / pin_project! { //~ ERROR reference to packed field is unaligned
+14 | | #[repr(packed(2))]
+15 | | struct PackedN {
+16 | | #[pin]
+17 | | field: u32,
+18 | | }
+19 | | }
+ | |_^
+ = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+ = note: for more information, see issue #82523 <https://github.com/rust-lang/rust/issues/82523>
+ = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
+ = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)
+ = note: this error originates in the macro `$crate::__pin_project_constant` (in Nightly builds, run with -Z macro-backtrace for more info)
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ struct Foo {
+ #[pin]
+ inner: u8,
+ }
+}
+
+impl Unpin for __Origin {} //~ ERROR E0412,E0321
+
+fn main() {}
--- /dev/null
+error[E0412]: cannot find type `__Origin` in this scope
+ --> tests/ui/pin_project/unpin_sneaky.rs:10:16
+ |
+10 | impl Unpin for __Origin {} //~ ERROR E0412,E0321
+ | ^^^^^^^^ not found in this scope
+
+error[E0321]: cross-crate traits with a default impl, like `Unpin`, can only be implemented for a struct/enum type, not `[type error]`
+ --> tests/ui/pin_project/unpin_sneaky.rs:10:1
+ |
+10 | impl Unpin for __Origin {} //~ ERROR E0412,E0321
+ | ^^^^^^^^^^^^^^^^^^^^^^^ can't implement cross-crate trait with a default impl for non-struct/enum type
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ struct Struct1 {} //~ ERROR no rules expected the token `}`
+}
+
+pin_project! {
+ struct Struct2(); //~ ERROR no rules expected the token `(`
+}
+
+pin_project! {
+ struct Struct3; //~ ERROR no rules expected the token `;`
+}
+
+pin_project! {
+ enum Enum { //~ ERROR no rules expected the token `enum`
+ A(u8)
+ }
+}
+
+pin_project! {
+ union Union { //~ ERROR no rules expected the token `union`
+ x: u8,
+ }
+}
+
+fn main() {}
--- /dev/null
+error: no rules expected the token `}`
+ --> tests/ui/pin_project/unsupported.rs:3:1
+ |
+3 | / pin_project! {
+4 | | struct Struct1 {} //~ ERROR no rules expected the token `}`
+5 | | }
+ | |_^ no rules expected this token in macro call
+ |
+ = note: this error originates in the macro `$crate::__pin_project_expand` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: no rules expected the token `}`
+ --> tests/ui/pin_project/unsupported.rs:3:1
+ |
+3 | / pin_project! {
+4 | | struct Struct1 {} //~ ERROR no rules expected the token `}`
+5 | | }
+ | |_^ no rules expected this token in macro call
+ |
+ = note: this error originates in the macro `$crate::__pin_project_expand` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: no rules expected the token `(`
+ --> tests/ui/pin_project/unsupported.rs:8:19
+ |
+8 | struct Struct2(); //~ ERROR no rules expected the token `(`
+ | ^ no rules expected this token in macro call
+
+error: no rules expected the token `;`
+ --> tests/ui/pin_project/unsupported.rs:12:19
+ |
+12 | struct Struct3; //~ ERROR no rules expected the token `;`
+ | ^ no rules expected this token in macro call
+
+error: no rules expected the token `enum`
+ --> tests/ui/pin_project/unsupported.rs:15:1
+ |
+15 | / pin_project! {
+16 | | enum Enum { //~ ERROR no rules expected the token `enum`
+17 | | A(u8)
+18 | | }
+19 | | }
+ | |_^ no rules expected this token in macro call
+ |
+ = note: this error originates in the macro `$crate::__pin_project_expand` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: no rules expected the token `enum`
+ --> tests/ui/pin_project/unsupported.rs:15:1
+ |
+15 | / pin_project! {
+16 | | enum Enum { //~ ERROR no rules expected the token `enum`
+17 | | A(u8)
+18 | | }
+19 | | }
+ | |_^ no rules expected this token in macro call
+ |
+ = note: this error originates in the macro `$crate::__pin_project_expand` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: no rules expected the token `union`
+ --> tests/ui/pin_project/unsupported.rs:21:1
+ |
+21 | / pin_project! {
+22 | | union Union { //~ ERROR no rules expected the token `union`
+23 | | x: u8,
+24 | | }
+25 | | }
+ | |_^ no rules expected this token in macro call
+ |
+ = note: this error originates in the macro `$crate::__pin_project_expand` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: no rules expected the token `union`
+ --> tests/ui/pin_project/unsupported.rs:21:1
+ |
+21 | / pin_project! {
+22 | | union Union { //~ ERROR no rules expected the token `union`
+23 | | x: u8,
+24 | | }
+25 | | }
+ | |_^ no rules expected this token in macro call
+ |
+ = note: this error originates in the macro `$crate::__pin_project_expand` (in Nightly builds, run with -Z macro-backtrace for more info)
--- /dev/null
+use pin_project_lite::pin_project;
+
+pin_project! {
+ pub struct S {
+ #[pin]
+ field: u8,
+ }
+ impl PinnedDrop for S {
+ fn drop(this: Pin<&mut Self>) {
+ __drop_inner(this);
+ }
+ }
+}
+
+fn main() {
+ let _x = S { field: 0 };
+}
--- /dev/null
+error[E0061]: this function takes 0 arguments but 1 argument was supplied
+ --> tests/ui/pinned_drop/call-drop-inner.rs:10:13
+ |
+10 | __drop_inner(this);
+ | ^^^^^^^^^^^^ ---- argument unexpected
+ |
+note: function defined here
+ --> tests/ui/pinned_drop/call-drop-inner.rs:3:1
+ |
+3 | / pin_project! {
+4 | | pub struct S {
+5 | | #[pin]
+6 | | field: u8,
+... |
+12 | | }
+13 | | }
+ | |_^
+ = note: this error originates in the macro `$crate::__pin_project_make_drop_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
+help: remove the extra argument
+ |
+10 | __drop_inner();
+ | ~~~~~~~~~~~~~~
--- /dev/null
+use pin_project_lite::pin_project;
+
+// In `Drop` impl, the implementor must specify the same requirement as type definition.
+
+struct DropImpl<T> {
+ f: T,
+}
+
+impl<T: Unpin> Drop for DropImpl<T> {
+ //~^ ERROR E0367
+ fn drop(&mut self) {}
+}
+
+pin_project! {
+ //~^ ERROR E0367
+ struct PinnedDropImpl<T> {
+ #[pin]
+ f: T,
+ }
+
+ impl<T: Unpin> PinnedDrop for PinnedDropImpl<T> {
+ fn drop(_this: Pin<&mut Self>) {}
+ }
+}
+
+fn main() {}
--- /dev/null
+error[E0367]: `Drop` impl requires `T: Unpin` but the struct it is implemented for does not
+ --> tests/ui/pinned_drop/conditional-drop-impl.rs:9:9
+ |
+9 | impl<T: Unpin> Drop for DropImpl<T> {
+ | ^^^^^
+ |
+note: the implementor must specify the same requirement
+ --> tests/ui/pinned_drop/conditional-drop-impl.rs:5:1
+ |
+5 | / struct DropImpl<T> {
+6 | | f: T,
+7 | | }
+ | |_^
+
+error[E0367]: `Drop` impl requires `T: Unpin` but the struct it is implemented for does not
+ --> tests/ui/pinned_drop/conditional-drop-impl.rs:14:1
+ |
+14 | / pin_project! {
+15 | | //~^ ERROR E0367
+16 | | struct PinnedDropImpl<T> {
+17 | | #[pin]
+... |
+23 | | }
+24 | | }
+ | |_^
+ |
+note: the implementor must specify the same requirement
+ --> tests/ui/pinned_drop/conditional-drop-impl.rs:14:1
+ |
+14 | / pin_project! {
+15 | | //~^ ERROR E0367
+16 | | struct PinnedDropImpl<T> {
+17 | | #[pin]
+... |
+23 | | }
+24 | | }
+ | |_^
+ = note: this error originates in the macro `$crate::__pin_project_make_drop_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
projects / platform / upstream / rust-pin-project-lite.git / commitdiff