Function fmt_fn

crates/codegen/src/util.rs:38–46

Turns a closure `f: Fn(&mut Formatter) -> Result` into `fmt::Display`.

(f: impl Fn(&mut Formatter) -> Result)

/// Turns a closure `f: Fn(&mut Formatter) -> Result` into `fmt::Display`.
pub(super) fn fmt_fn(f: impl Fn(&mut Formatter) -> Result) -> impl Display {
    struct FDisplay<F>(F);
    impl<F: Fn(&mut Formatter) -> Result> Display for FDisplay<F> {
        fn fmt(&self, f: &mut Formatter<'_>) -> Result {
            (self.0)(f)
        }
    }
    FDisplay(f)
}

pub(super) fn collect_case<'a>(case: Case, segs: impl Iterator<Item = &'a Identifier>) -> String {
    segs.map(|s| s.deref().to_case(case)).join(case.delim())