mirror of https://github.com/rust-lang/rust
23 lines
625 B
Rust
23 lines
625 B
Rust
#![feature(try_trait_v2)]
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use std::ops::Try;
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fn main() {
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// error for a `Try` type on a non-`Try` fn
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std::fs::File::open("foo")?; //~ ERROR the `?` operator can only
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// a non-`Try` type on a non-`Try` fn
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()?; //~ ERROR the `?` operator can only be applied to
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//~^ ERROR the `?` operator can only be used in a function that
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// an unrelated use of `Try`
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try_trait_generic::<()>(); //~ ERROR the trait bound
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}
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fn try_trait_generic<T: Try>() -> T {
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// and a non-`Try` object on a `Try` fn.
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()?; //~ ERROR the `?` operator can only be applied to values that implement `Try`
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loop {}
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}
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