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20 lines
645 B
Rust
20 lines
645 B
Rust
use std::fmt::Debug;
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use super::Result;
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pub trait MapExpect<'a, T> {
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/// Calls expect(msg) on the mapped Result value. This is similar to
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/// map(Result::unwrap) but composes an expect call and message without
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/// requiring a closure.
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fn map_expect(self, msg: &'a str) -> T;
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}
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impl<'a, T, E: Debug> MapExpect<'a, Option<T>> for Option<Result<T, E>> {
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#[inline]
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fn map_expect(self, msg: &'a str) -> Option<T> { self.map(|result| result.expect(msg)) }
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}
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impl<'a, T, E: Debug> MapExpect<'a, Result<T, E>> for Result<Option<T>, E> {
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#[inline]
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fn map_expect(self, msg: &'a str) -> Result<T, E> { self.map(|result| result.expect(msg)) }
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}
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