PDepend\Source\Language\PHP\AbstractPHPParser::parseStringExpressions PHP Метод

    private function parseStringExpressions(ASTNode $node, $stopToken)
    {
        while (($tokenType = $this->tokenizer->peek()) != Tokenizer::T_EOF) {
            switch ($tokenType) {
                case $stopToken:
                    break 2;
                case Tokens::T_BACKSLASH:
                    $node->addChild($this->parseEscapedAstLiteralString());
                    break;
                case Tokens::T_DOLLAR:
                    $node->addChild($this->parseCompoundVariableOrLiteral());
                    break;
                case Tokens::T_VARIABLE:
                    $node->addChild($this->parseVariable());
                    break;
                case Tokens::T_CURLY_BRACE_OPEN:
                    $node->addChild($this->parseCompoundExpressionOrLiteral());
                    break;
                default:
                    $node->addChild($this->parseLiteral());
                    break;
            }
        }
        return $node;
    }