27 lines
532 B
Rust
27 lines
532 B
Rust
// run-pass
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#![allow(non_upper_case_globals)]
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#![allow(dead_code)]
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// `expr?` expands to:
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//
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// match expr {
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// Ok(val) => val,
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// Err(err) => return Err(From::from(err)),
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// }
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//
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// This test verifies that the expansion is hygienic, i.e., it's not affected by other `val` and
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// `err` bindings that may be in scope.
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use std::num::ParseIntError;
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fn main() {
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assert_eq!(parse(), Ok(1));
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}
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fn parse() -> Result<i32, ParseIntError> {
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const val: char = 'a';
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const err: char = 'b';
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Ok("1".parse::<i32>()?)
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}
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