Function flat_map_modify

src/expr/src/relation/canonicalize.rs:198–205

Applies a flat_map on a Vec, and overwrites the vec with the result.

(v: &mut Vec<T>, f: F)

/// Applies a flat_map on a Vec, and overwrites the vec with the result.
fn flat_map_modify<T, I, F>(v: &mut Vec<T>, f: F)
where
    F: FnMut(T) -> I,
    I: IntoIterator<Item = T>,
{
    let mut xx = v.drain(..).flat_map(f).collect();
    v.append(&mut xx);
}

/// Canonicalize predicates of a filter.
///