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Fabien Potencier
57 lines
2.7 KiB
PHP
57 lines
2.7 KiB
PHP
<?php
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/*
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* This file is part of Twig.
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*
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* (c) Fabien Potencier
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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use Twig\Environment;
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use Twig\ExpressionParser\ExpressionParserDescriptionInterface;
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use Twig\ExpressionParser\ExpressionParserType;
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use Twig\ExpressionParser\InfixAssociativity;
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use Twig\ExpressionParser\InfixExpressionParserInterface;
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use Twig\Loader\ArrayLoader;
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require_once \dirname(__DIR__).'/vendor/autoload.php';
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$output = fopen(\dirname(__DIR__).'/doc/operators_precedence.rst', 'w');
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$twig = new Environment(new ArrayLoader([]));
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$expressionParsers = [];
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foreach ($twig->getExpressionParsers() as $expressionParser) {
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$expressionParsers[] = $expressionParser;
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}
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fwrite($output, "\n=========== ================ ======= ============= ===========\n");
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fwrite($output, "Precedence Operator Type Associativity Description\n");
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fwrite($output, '=========== ================ ======= ============= ===========');
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usort($expressionParsers, fn ($a, $b) => $b->getPrecedence() <=> $a->getPrecedence());
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$previous = null;
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foreach ($expressionParsers as $expressionParser) {
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$precedence = $expressionParser->getPrecedence();
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$previousPrecedence = $previous ? $previous->getPrecedence() : \PHP_INT_MAX;
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$associativity = $expressionParser instanceof InfixExpressionParserInterface ? (InfixAssociativity::Left === $expressionParser->getAssociativity() ? 'Left' : 'Right') : 'n/a';
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$previousAssociativity = $previous ? ($previous instanceof InfixExpressionParserInterface ? (InfixAssociativity::Left === $previous->getAssociativity() ? 'Left' : 'Right') : 'n/a') : 'n/a';
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if ($previousPrecedence !== $precedence) {
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$previous = null;
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}
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fwrite($output, rtrim(\sprintf("\n%-11s %-16s %-7s %-13s %s\n",
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(!$previous || $previousPrecedence !== $precedence ? $precedence : '').($expressionParser->getPrecedenceChange() ? ' => '.$expressionParser->getPrecedenceChange()->getNewPrecedence() : ''),
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'``'.$expressionParser->getName().'``',
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!$previous || ExpressionParserType::getType($previous) !== ExpressionParserType::getType($expressionParser) ? ExpressionParserType::getType($expressionParser)->value : '',
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!$previous || $previousAssociativity !== $associativity ? $associativity : '',
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$expressionParser instanceof ExpressionParserDescriptionInterface ? $expressionParser->getDescription() : '',
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)));
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$previous = $expressionParser;
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}
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fwrite($output, "\n=========== ================ ======= ============= ===========\n");
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fwrite($output, "\nWhen a precedence will change in the next major version, the new precedence is indicated by the arrow ``=>``.\n");
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fclose($output);
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