Function inlineRecordExprSpreads

compiler/optimizer/optimizer.go:456–481

inlineRecordExprSpreads transforms "{...{a}}" to "{a}".

(v any)

// inlineRecordExprSpreads transforms "{...{a}}" to "{a}".
func inlineRecordExprSpreads(v any) {
	walkT(reflect.ValueOf(v), func(r *dag.RecordExpr) *dag.RecordExpr {
		for i := range r.Elems {
			s, ok := r.Elems[i].(*dag.Spread)
			if !ok {
				continue
			}
			r2, ok := s.Expr.(*dag.RecordExpr)
			if !ok {
				continue
			}
			r.Elems = slices.Concat(r.Elems[:i], r2.Elems, r.Elems[i+1:])
		}
		// dedupe elems from spreads
		m := map[string]struct{}{}
		for i := len(r.Elems) - 1; i >= 0; i-- {
			if f, ok := r.Elems[i].(*dag.Field); ok {
				if _, ok := m[f.Name]; ok {
					r.Elems = slices.Delete(r.Elems, i, i+1)
				}
				m[f.Name] = struct{}{}
			}
		}
		return r
	})
}

func joinFilterPullup(seq dag.Seq) dag.Seq {
	seq = mergeFilters(seq)