diff options
Diffstat (limited to 'tests/ui/dst/issue-90528-unsizing-suggestion-2.rs')
-rw-r--r-- | tests/ui/dst/issue-90528-unsizing-suggestion-2.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/ui/dst/issue-90528-unsizing-suggestion-2.rs b/tests/ui/dst/issue-90528-unsizing-suggestion-2.rs new file mode 100644 index 000000000..f2762ad42 --- /dev/null +++ b/tests/ui/dst/issue-90528-unsizing-suggestion-2.rs @@ -0,0 +1,28 @@ +// Issue #90528: provide helpful suggestions when a trait bound is unsatisfied +// due to a missed unsizing coercion. +// +// This test exercises array variables and a trait implemented on immmutable slices. + +trait Read {} + +impl Read for &[u8] {} + +fn wants_read(_: impl Read) {} + +fn main() { + let x = [0u8]; + wants_read(x); + //~^ ERROR the trait bound `[u8; 1]: Read` is not satisfied + wants_read(&x); + //~^ ERROR the trait bound `&[u8; 1]: Read` is not satisfied + wants_read(&x[..]); + + let x = &[0u8]; + wants_read(x); + //~^ ERROR the trait bound `&[u8; 1]: Read` is not satisfied + wants_read(&x); + //~^ ERROR the trait bound `&&[u8; 1]: Read` is not satisfied + wants_read(*x); + //~^ ERROR the trait bound `[u8; 1]: Read` is not satisfied + wants_read(&x[..]); +} |