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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/associated-consts/defaults-cyclic-pass.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/associated-consts/defaults-cyclic-pass.rs')
-rw-r--r-- | src/test/ui/associated-consts/defaults-cyclic-pass.rs | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/test/ui/associated-consts/defaults-cyclic-pass.rs b/src/test/ui/associated-consts/defaults-cyclic-pass.rs new file mode 100644 index 000000000..82105f25f --- /dev/null +++ b/src/test/ui/associated-consts/defaults-cyclic-pass.rs @@ -0,0 +1,36 @@ +// run-pass + +// Cyclic assoc. const defaults don't error unless *used* +trait Tr { + const A: u8 = Self::B; + const B: u8 = Self::A; +} + +// This impl is *allowed* unless its assoc. consts are used, matching the +// behavior without defaults. +impl Tr for () {} + +// Overriding either constant breaks the cycle +impl Tr for u8 { + const A: u8 = 42; +} + +impl Tr for u16 { + const B: u8 = 0; +} + +impl Tr for u32 { + const A: u8 = 100; + const B: u8 = 123; +} + +fn main() { + assert_eq!(<u8 as Tr>::A, 42); + assert_eq!(<u8 as Tr>::B, 42); + + assert_eq!(<u16 as Tr>::A, 0); + assert_eq!(<u16 as Tr>::B, 0); + + assert_eq!(<u32 as Tr>::A, 100); + assert_eq!(<u32 as Tr>::B, 123); +} |