12 lines
312 B
Rust
12 lines
312 B
Rust
use anyhow::Result;
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pub trait Traverse<T, U> {
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fn traverse(self, f: impl FnOnce(T) -> Result<U>) -> Result<Option<U>>;
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}
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impl<T, U> Traverse<T, U> for Option<T> {
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fn traverse(self, f: impl FnOnce(T) -> Result<U>) -> Result<Option<U>> {
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self.map_or(Ok(None), |value| f(value).map(Some))
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}
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}
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