When supporting calls to super traits we need to allow lookups based on
the super traits as specified on the TraitReferences.
Fixes #1555
gcc/rust/ChangeLog:
* typecheck/rust-hir-trait-ref.h (lookup_trait_item): Add lookup
in super_trait.
gcc/testsuite/ChangeLog:
* rust/compile/torture/issue-1555.rs: New test.
return true;
}
}
+
+ // lookup super traits
+ for (const auto &super_trait : super_traits)
+ {
+ bool found = super_trait->lookup_trait_item (ident, ref);
+ if (found)
+ return true;
+ }
+
return false;
}
if (ident.compare (item.get_identifier ()) == 0)
return &item;
}
+
+ // lookup super traits
+ for (const auto &super_trait : super_traits)
+ {
+ const TraitItemReference *res
+ = super_trait->lookup_trait_item (ident, type);
+ if (!res->is_error ())
+ return res;
+ }
+
return &TraitItemReference::error_node ();
}
--- /dev/null
+extern "C" {
+ fn printf(s: *const i8, ...);
+}
+
+struct Foo(i32);
+trait Bar {
+ fn baz(&self);
+}
+
+trait Baz: Bar {
+ fn qux(&self);
+}
+
+impl Bar for Foo {
+ fn baz(&self) {
+ unsafe {
+ let a = "baz %i\n\0";
+ let b = a as *const str;
+ let c = b as *const i8;
+
+ printf(c, self.0);
+ }
+ }
+}
+
+impl Baz for Foo {
+ fn qux(&self) {
+ unsafe {
+ let a = "qux %i\n\0";
+ let b = a as *const str;
+ let c = b as *const i8;
+
+ printf(c, self.0);
+ }
+ }
+}
+
+fn static_dispatch<T: Baz>(t: &T) {
+ t.baz();
+ t.qux();
+}
+
+pub fn main() {
+ let a;
+ a = &Foo(123);
+
+ static_dispatch(a);
+}