Файл: upload/core/vendor/twig/twig/src/Node/Expression/NullCoalesceExpression.php
Строк: 121
<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace TwigNodeExpression;
use TwigCompiler;
use TwigNodeEmptyNode;
use TwigNodeExpressionBinaryAndBinary;
use TwigNodeExpressionBinaryNullCoalesceBinary;
use TwigNodeExpressionTestDefinedTest;
use TwigNodeExpressionTestNullTest;
use TwigNodeExpressionUnaryNotUnary;
use TwigNodeExpressionVariableContextVariable;
use TwigNodeNode;
use TwigTwigTest;
class NullCoalesceExpression extends ConditionalExpression
{
/**
* @param AbstractExpression $left
* @param AbstractExpression $right
*/
public function __construct(Node $left, Node $right, int $lineno)
{
trigger_deprecation('twig/twig', '3.17', sprintf('"%s" is deprecated; use "%s" instead.', __CLASS__, NullCoalesceBinary::class));
if (!$left instanceof AbstractExpression) {
trigger_deprecation('twig/twig', '3.15', 'Not passing a "%s" instance to the "left" argument of "%s" is deprecated ("%s" given).', AbstractExpression::class, static::class, $left::class);
}
if (!$right instanceof AbstractExpression) {
trigger_deprecation('twig/twig', '3.15', 'Not passing a "%s" instance to the "right" argument of "%s" is deprecated ("%s" given).', AbstractExpression::class, static::class, $right::class);
}
$test = new DefinedTest(clone $left, new TwigTest('defined'), new EmptyNode(), $left->getTemplateLine());
// for "block()", we don't need the null test as the return value is always a string
if (!$left instanceof BlockReferenceExpression) {
$test = new AndBinary(
$test,
new NotUnary(new NullTest($left, new TwigTest('null'), new EmptyNode(), $left->getTemplateLine()), $left->getTemplateLine()),
$left->getTemplateLine()
);
}
parent::__construct($test, $left, $right, $lineno);
}
public function compile(Compiler $compiler): void
{
/*
* This optimizes only one case. PHP 7 also supports more complex expressions
* that can return null. So, for instance, if log is defined, log("foo") ?? "..." works,
* but log($a["foo"]) ?? "..." does not if $a["foo"] is not defined. More advanced
* cases might be implemented as an optimizer node visitor, but has not been done
* as benefits are probably not worth the added complexity.
*/
if ($this->getNode('expr2') instanceof ContextVariable) {
$this->getNode('expr2')->setAttribute('always_defined', true);
$compiler
->raw('((')
->subcompile($this->getNode('expr2'))
->raw(') ?? (')
->subcompile($this->getNode('expr3'))
->raw('))')
;
} else {
parent::compile($compiler);
}
}
}