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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/specialization/specialization-translate-projections.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/specialization/specialization-translate-projections.rs')
-rw-r--r-- | src/test/ui/specialization/specialization-translate-projections.rs | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/test/ui/specialization/specialization-translate-projections.rs b/src/test/ui/specialization/specialization-translate-projections.rs new file mode 100644 index 000000000..92ea9e2b8 --- /dev/null +++ b/src/test/ui/specialization/specialization-translate-projections.rs @@ -0,0 +1,33 @@ +// run-pass + +// Ensure that provided items are inherited properly even when impls vary in +// type parameters *and* rely on projections. + +#![feature(specialization)] //~ WARN the feature `specialization` is incomplete + +use std::convert::Into; + +trait Trait { + fn to_u8(&self) -> u8; +} +trait WithAssoc { + type Item; + fn to_item(&self) -> Self::Item; +} + +impl<T, U> Trait for T where T: WithAssoc<Item=U>, U: Into<u8> { + fn to_u8(&self) -> u8 { + self.to_item().into() + } +} + +impl WithAssoc for u8 { + type Item = u8; + fn to_item(&self) -> u8 { *self } +} + +impl Trait for u8 {} + +fn main() { + assert!(3u8.to_u8() == 3u8); +} |