9 lines
317 B
Rust
9 lines
317 B
Rust
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/// Processes `iter` returning the last successful result or the first error.
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pub fn fold_ok<X, I, R, E, F>(iter: I, mut func: F) -> Result<R, E>
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where I: Iterator<Item = X>,
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R: Default,
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F: FnMut(X) -> Result<R, E>
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{
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iter.fold(Ok(R::default()), |acc, item| acc.and_then(|_| func(item)))
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}
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