mirror of https://github.com/rust-lang/rust
29 lines
801 B
Rust
29 lines
801 B
Rust
// Issue #90528: provide helpful suggestions when a trait bound is unsatisfied
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// due to a missed unsizing coercion.
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//
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// This test exercises array variables and a trait implemented on immmutable slices.
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trait Read {}
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impl Read for &[u8] {}
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fn wants_read(_: impl Read) {}
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fn main() {
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let x = [0u8];
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wants_read(x);
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//~^ ERROR the trait bound `[u8; 1]: Read` is not satisfied
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wants_read(&x);
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//~^ ERROR the trait bound `&[u8; 1]: Read` is not satisfied
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wants_read(&x[..]);
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let x = &[0u8];
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wants_read(x);
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//~^ ERROR the trait bound `&[u8; 1]: Read` is not satisfied
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wants_read(&x);
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//~^ ERROR the trait bound `&&[u8; 1]: Read` is not satisfied
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wants_read(*x);
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//~^ ERROR the trait bound `[u8; 1]: Read` is not satisfied
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wants_read(&x[..]);
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}
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