w_result

This Rust crate defines WResult, a result type that carries warnings.

Sometimes it may be possible for an operation to proceed despite encountering errors. In these cases it's useful to notify the caller about these errors in case they need to act on them. For this, functions can return a WResult.

enum WResult<T, W, E> {
    WOk(T, Vec<W>),
    WErr(e),
}

WResult is similar to Result except that the ok variant carries a vector of warnings alongside it's value. The advantages over just using Result<(T, Vec<W>), E> are

• Clarity.
• Some WResult methods will automatically accumulate warnings from multiple WResults (See for example and and the FromIterator<WResult<..>> impl).
• WResult<T, W, E> comes with methods to convert it to a Result<T, E> by discarding or or logging the warnings or treating them as errors.