<?php

namespace App\Doctrine\Functions;

use Doctrine\ORM\Query\AST\Functions\FunctionNode;
use Doctrine\ORM\Query\Lexer;
use Doctrine\ORM\Query\Parser;
use Doctrine\ORM\Query\SqlWalker;

class Sin extends FunctionNode
{
    public $arithmeticExpression;

    public function getSql(SqlWalker $sqlWalker)
    {
        return 'SIN(' . $sqlWalker->walkArithmeticExpression($this->arithmeticExpression) . ')';
    }

    public function parse(Parser $parser)
    {
        $parser->match(Lexer::T_IDENTIFIER);
        $parser->match(Lexer::T_OPEN_PARENTHESIS);
        $this->arithmeticExpression = $parser->ArithmeticExpression();
        $parser->match(Lexer::T_CLOSE_PARENTHESIS);
    }
}