Function GetAssignmentTarget

internal/ast/utilities.go:184–226

Returns the BinaryExpression, PrefixUnaryExpression, PostfixUnaryExpression, or ForInOrOfStatement that references the given node as an assignment target

(node *Node)

// Returns the BinaryExpression, PrefixUnaryExpression, PostfixUnaryExpression, or ForInOrOfStatement that references
// the given node as an assignment target
func GetAssignmentTarget(node *Node) *Node {
	for {
		parent := node.Parent
		switch parent.Kind {
		case KindBinaryExpression:
			if IsAssignmentOperator(parent.AsBinaryExpression().OperatorToken.Kind) && parent.AsBinaryExpression().Left == node {
				return parent
			}
			return nil
		case KindPrefixUnaryExpression:
			if parent.AsPrefixUnaryExpression().Operator == KindPlusPlusToken || parent.AsPrefixUnaryExpression().Operator == KindMinusMinusToken {
				return parent
			}
			return nil
		case KindPostfixUnaryExpression:
			if parent.AsPostfixUnaryExpression().Operator == KindPlusPlusToken || parent.AsPostfixUnaryExpression().Operator == KindMinusMinusToken {
				return parent
			}
			return nil
		case KindForInStatement, KindForOfStatement:
			if parent.Initializer() == node {
				return parent
			}
			return nil
		case KindParenthesizedExpression, KindArrayLiteralExpression, KindSpreadElement, KindNonNullExpression:
			node = parent
		case KindSpreadAssignment:
			node = parent.Parent
		case KindShorthandPropertyAssignment:
			if parent.AsShorthandPropertyAssignment().Name() != node {
				return nil
			}
			node = parent.Parent
		case KindPropertyAssignment:
			if parent.AsPropertyAssignment().Name() == node {
				return nil
			}
			node = parent.Parent
		default:
			return nil
		}
	}
}

func IsLogicalBinaryOperator(token Kind) bool {
	return token == KindBarBarToken || token == KindAmpersandAmpersandToken