29 lines
482 B
Rust
29 lines
482 B
Rust
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// check-pass
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// compile-flags: -Ztrait-solver=next
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use std::error::Error;
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fn main() -> Result<(), Box<dyn Error>> {
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let x: i32 = parse()?;
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Ok(())
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}
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trait Parse {}
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impl Parse for i32 {}
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#[derive(Debug)]
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struct ParseError;
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impl std::fmt::Display for ParseError {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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write!(f, "ParseError")
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}
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}
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impl Error for ParseError {}
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fn parse<T: Parse>() -> Result<T, ParseError> {
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todo!()
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}
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