+++ /dev/null
-//===- llvm/ADT/StringViewExtras.h - Useful string_view functions C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-///
-/// \file
-/// This file contains some functions that are useful when dealing with
-/// string_views.
-///
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_ADT_STRINGVIEWEXTRAS_H
-#define LLVM_ADT_STRINGVIEWEXTRAS_H
-
-#include <string_view>
-
-namespace llvm {
-
-// FIXME: std::string_view::starts_with is not available until C++20. Once LLVM
-// is upgraded to C++20, remove this header and users.
-
-inline constexpr bool starts_with(std::string_view self, char C) {
- return !self.empty() && self.front() == C;
-}
-inline constexpr bool starts_with(std::string_view haystack,
- std::string_view needle) {
- return haystack.substr(0, needle.size()) == needle;
-}
-
-} // end namespace llvm
-
-#endif // LLVM_ADT_STRINGVIEWEXTRAS_H
+++ /dev/null
-//===- StringExtrasTest.cpp - Unit tests for String extras ----------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/StringViewExtras.h"
-#include "llvm/Support/raw_ostream.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-#include <string_view>
-
-using namespace llvm;
-
-TEST(StringViewExtrasTest, starts_with) {
- std::string haystack = "hello world";
- EXPECT_TRUE(llvm::starts_with(haystack, 'h'));
- EXPECT_FALSE(llvm::starts_with(haystack, '\0'));
- EXPECT_TRUE(llvm::starts_with(haystack, "hello"));
- // TODO: should this differ from \0?
- EXPECT_TRUE(llvm::starts_with(haystack, ""));
-
- std::string empty;
- EXPECT_FALSE(llvm::starts_with(empty, 'h'));
- EXPECT_FALSE(llvm::starts_with(empty, '\0'));
- EXPECT_FALSE(llvm::starts_with(empty, "hello"));
- // TODO: should this differ from \0?
- EXPECT_TRUE(llvm::starts_with(empty, ""));
-}