mirror of https://github.com/rust-lang/rust.git
28 lines
469 B
Rust
28 lines
469 B
Rust
// check-pass
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pub trait ResultExt {
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type Ok;
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fn err_eprint_and_ignore(self) -> Option<Self::Ok>;
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}
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impl<O, E> ResultExt for std::result::Result<O, E>
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where
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E: std::error::Error,
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{
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type Ok = O;
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fn err_eprint_and_ignore(self) -> Option<O>
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where
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Self: ,
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{
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match self {
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Err(e) => {
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eprintln!("{}", e);
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None
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}
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Ok(o) => Some(o),
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}
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}
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}
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fn main() {}
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