mirror of https://github.com/rust-lang/rust
21 lines
497 B
Rust
21 lines
497 B
Rust
//@ run-pass
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#![allow(unused_imports)]
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// Test a regression found when building compiler. The `produce()`
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// error type `T` winds up getting unified with result of `x.parse()`;
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// the type of the closure given to `unwrap_or_else` needs to be
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// inferred to `usize`.
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use std::num::ParseIntError;
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fn produce<T>() -> Result<&'static str, T> {
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Ok("22")
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}
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fn main() {
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let x: usize = produce()
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.and_then(|x| x.parse())
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.unwrap_or_else(|_| panic!());
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println!("{}", x);
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}
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