INNER CODE UNIT · Rust

get_or_insert_with

fishfolk/bones · framework_crates/bones_asset/src/lib.rs:193

    pub fn get_or_insert_with<F: FnOnce() -> T>(&mut self, f: F) -> &mut T {
        if let Maybe::Unset = self {
            *self = Maybe::Set(f());
        }
        match self {
            Maybe::Set(ref mut v) => v,
            Maybe::Unset => unreachable!(),
        }
    }

    /// Takes the value out of the option, leaving an `Unset` in its place.
    #[inline]
    pub fn take(&mut self) -> Maybe<T> {
        std::mem::replace(self, Maybe::Unset)
    }

    /// Replaces the actual value in the option by the value given in parameter, returning the old value if present.
    #[inline]

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