Method push

crates/environ/src/component/dfg.rs:573–581

Inserts the `value` specified into this set, returning either a fresh key `K` if this value hasn't been seen before or otherwise returning the previous `K` used to represent value. Note that this should only be used for component model items where the creation of `value` is not side-effectful.

(&mut self, value: V)

    /// Note that this should only be used for component model items where the
    /// creation of `value` is not side-effectful.
    pub fn push(&mut self, value: V) -> K
    where
        V: Hash + Eq + Clone,
    {
        *self
            .intern_map
            .entry(value.clone())
            .or_insert_with(|| self.key_map.push(value))
    }

    /// Returns an iterator of all the values contained within this set.
    pub fn iter(&self) -> impl Iterator<Item = (K, &V)> {