My Rust Snippets

samples.rs

// https://stackoverflow.com/questions/25576748/how-to-compare-enum-without-pattern-matching

macro_rules! matches(
    ($e:expr, $p:pat) => (
        match $e {
            $p => true,
            _ => false
        }
    )
);

... filter(|f| matches!(f, Some::Enum)