INNER CODE UNIT · Rust

get_or_insert

fishfolk/bones · framework_crates/bones_asset/src/lib.rs:181

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

    /// Inserts a value computed from `f` into the option if it is `Unset`, then returns a mutable reference to the contained value.
    #[inline]
    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,

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