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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/traits/inheritance/repeated-supertrait-ambig.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 '')
-rw-r--r-- | src/test/ui/traits/inheritance/repeated-supertrait-ambig.rs | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/test/ui/traits/inheritance/repeated-supertrait-ambig.rs b/src/test/ui/traits/inheritance/repeated-supertrait-ambig.rs new file mode 100644 index 000000000..727897d20 --- /dev/null +++ b/src/test/ui/traits/inheritance/repeated-supertrait-ambig.rs @@ -0,0 +1,43 @@ +// Test a case of a trait which extends the same supertrait twice, but +// with difference type parameters. Test then that when we don't give +// enough information to pick between these, no selection is made. In +// this particular case, the two choices are i64/u64 -- so when we use +// an integer literal, we wind up falling this literal back to i32. +// See also `run-pass/trait-repeated-supertrait.rs`. + +trait CompareTo<T> { + fn same_as(&self, t: T) -> bool; +} + +trait CompareToInts : CompareTo<i64> + CompareTo<u64> { +} + +impl CompareTo<i64> for i64 { + fn same_as(&self, t: i64) -> bool { *self == t } +} + +impl CompareTo<u64> for i64 { + fn same_as(&self, t: u64) -> bool { *self == (t as i64) } +} + +impl CompareToInts for i64 { } + +fn with_obj(c: &dyn CompareToInts) -> bool { + c.same_as(22) //~ ERROR `dyn CompareToInts: CompareTo<i32>` is not satisfied +} + +fn with_trait<C:CompareToInts>(c: &C) -> bool { + c.same_as(22) //~ ERROR `C: CompareTo<i32>` is not satisfied +} + +fn with_ufcs1<C:CompareToInts>(c: &C) -> bool { + <dyn CompareToInts>::same_as(c, 22) //~ ERROR `dyn CompareToInts: CompareTo<i32>` is not satisfi +} + +fn with_ufcs2<C:CompareToInts>(c: &C) -> bool { + CompareTo::same_as(c, 22) //~ ERROR `C: CompareTo<i32>` is not satisfied +} + +fn main() { + assert_eq!(22_i64.same_as(22), true); //~ ERROR `i64: CompareTo<i32>` is not satisfied +} |