src/parselets/expr/MemberAccessParselet.php
<?php
/**
* Quack Compiler and toolkit
* Copyright (C) 2015-2017 Quack and CONTRIBUTORS
*
* This file is part of Quack.
*
* Quack is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Quack is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Quack. If not, see <http://www.gnu.org/licenses/>.
*/
namespace QuackCompiler\Parselets\Expr;
use \QuackCompiler\Parser\Precedence;
use \QuackCompiler\Parser\Grammar;
use \QuackCompiler\Parser\SyntaxError;
use \QuackCompiler\Ast\Expr\Expr;
use \QuackCompiler\Ast\Expr\TernaryExpr;
use \QuackCompiler\Ast\Expr\NameExpr;
use \QuackCompiler\Ast\Expr\OperatorExpr;
use \QuackCompiler\Lexer\Token;
use \QuackCompiler\Lexer\Tag;
use \QuackCompiler\Parselets\InfixParselet;
class MemberAccessParselet implements InfixParselet
{
public function parse($grammar, $left, Token $token)
{
$right = null;
if ($grammar->reader->consumeIf('&(')) {
$next = $grammar->reader->lookahead;
$grammar->reader->consume();
$name = isset($next->lexeme)
? $next->lexeme
: $next->getTag();
$grammar->reader->match(')');
$right = "&($name)";
} else {
$right = $grammar->name_parser->_identifier();
}
return new OperatorExpr($left, $token->getTag(), $right);
}
public function getPrecedence()
{
return Precedence::MEMBER_ACCESS;
}
}