Function findIdentities

expr/node.go:372–400

(node Node, l IdentityNodes)

	return findIdentities(node, in)
}
func findIdentities(node Node, l IdentityNodes) IdentityNodes {
	switch n := node.(type) {
	case *IdentityNode:
		l = append(l, n)
	case *BinaryNode:
		for _, arg := range n.Args {
			l = findIdentities(arg, l)
		}
	case *BooleanNode:
		for _, arg := range n.Args {
			l = findIdentities(arg, l)
		}
	case *UnaryNode:
		l = findIdentities(n.Arg, l)
	case *TriNode:
		for _, arg := range n.Args {
			l = findIdentities(arg, l)
		}
	case *ArrayNode:
		for _, arg := range n.Args {
			l = findIdentities(arg, l)
		}
	case *FuncNode:
		for _, arg := range n.Args {
			l = findIdentities(arg, l)
		}
	}
	return l
}

// FilterSpecialIdentities given a list of identities, filter out
// special identities such as "null", "*", "match_all"