Method insert

cranelift/entity/src/map.rs:115–117

Insert the given key-value pair, returning the old value if it exists.

(&mut self, k: K, v: V)

    /// Insert the given key-value pair, returning the old value if it exists.
    pub fn insert(&mut self, k: K, v: V) -> Option<V> {
        self.try_insert(k, v).panic_on_oom()
    }

    /// Like `insert` but returns an error on allocation failure.
    pub fn try_insert(&mut self, k: K, v: V) -> Result<Option<V>, OutOfMemory> {