mirror of
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f7bb838601
f0425bc3cb
Improve scope, PHPStan extension types (#2747)
424 lines
20 KiB
PHP
424 lines
20 KiB
PHP
<?php
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declare (strict_types=1);
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namespace PHPStan\PhpDocParser\Parser;
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use PHPStan\PhpDocParser\Ast;
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use PHPStan\PhpDocParser\Ast\Type\IdentifierTypeNode;
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use PHPStan\PhpDocParser\Lexer\Lexer;
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use PHPStan\ShouldNotHappenException;
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use function array_key_exists;
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use function array_values;
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use function count;
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use function trim;
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class PhpDocParser
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{
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private const DISALLOWED_DESCRIPTION_START_TOKENS = [Lexer::TOKEN_UNION, Lexer::TOKEN_INTERSECTION];
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/** @var TypeParser */
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private $typeParser;
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/** @var ConstExprParser */
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private $constantExprParser;
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/** @var bool */
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private $requireWhitespaceBeforeDescription;
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public function __construct(\PHPStan\PhpDocParser\Parser\TypeParser $typeParser, \PHPStan\PhpDocParser\Parser\ConstExprParser $constantExprParser, bool $requireWhitespaceBeforeDescription = \false)
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{
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$this->typeParser = $typeParser;
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$this->constantExprParser = $constantExprParser;
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$this->requireWhitespaceBeforeDescription = $requireWhitespaceBeforeDescription;
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}
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public function parse(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\PhpDocNode
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{
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$tokens->consumeTokenType(Lexer::TOKEN_OPEN_PHPDOC);
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$tokens->tryConsumeTokenType(Lexer::TOKEN_PHPDOC_EOL);
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$children = [];
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if (!$tokens->isCurrentTokenType(Lexer::TOKEN_CLOSE_PHPDOC)) {
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$children[] = $this->parseChild($tokens);
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while ($tokens->tryConsumeTokenType(Lexer::TOKEN_PHPDOC_EOL) && !$tokens->isCurrentTokenType(Lexer::TOKEN_CLOSE_PHPDOC)) {
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$children[] = $this->parseChild($tokens);
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}
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}
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try {
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$tokens->consumeTokenType(Lexer::TOKEN_CLOSE_PHPDOC);
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} catch (\PHPStan\PhpDocParser\Parser\ParserException $e) {
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$name = '';
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if (count($children) > 0) {
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$lastChild = $children[count($children) - 1];
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if ($lastChild instanceof Ast\PhpDoc\PhpDocTagNode) {
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$name = $lastChild->name;
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}
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}
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$tokens->forwardToTheEnd();
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return new Ast\PhpDoc\PhpDocNode([new Ast\PhpDoc\PhpDocTagNode($name, new Ast\PhpDoc\InvalidTagValueNode($e->getMessage(), $e))]);
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}
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return new Ast\PhpDoc\PhpDocNode(array_values($children));
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}
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private function parseChild(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\PhpDocChildNode
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{
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if ($tokens->isCurrentTokenType(Lexer::TOKEN_PHPDOC_TAG)) {
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return $this->parseTag($tokens);
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}
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return $this->parseText($tokens);
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}
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private function parseText(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\PhpDocTextNode
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{
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$text = '';
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while (!$tokens->isCurrentTokenType(Lexer::TOKEN_PHPDOC_EOL)) {
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$text .= $tokens->getSkippedHorizontalWhiteSpaceIfAny() . $tokens->joinUntil(Lexer::TOKEN_PHPDOC_EOL, Lexer::TOKEN_CLOSE_PHPDOC, Lexer::TOKEN_END);
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if (!$tokens->isCurrentTokenType(Lexer::TOKEN_PHPDOC_EOL)) {
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break;
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}
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$tokens->pushSavePoint();
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$tokens->next();
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if ($tokens->isCurrentTokenType(Lexer::TOKEN_PHPDOC_TAG, Lexer::TOKEN_PHPDOC_EOL, Lexer::TOKEN_CLOSE_PHPDOC, Lexer::TOKEN_END)) {
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$tokens->rollback();
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break;
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}
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$tokens->dropSavePoint();
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$text .= "\n";
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}
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return new Ast\PhpDoc\PhpDocTextNode(trim($text, " \t"));
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}
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public function parseTag(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\PhpDocTagNode
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{
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$tag = $tokens->currentTokenValue();
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$tokens->next();
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$value = $this->parseTagValue($tokens, $tag);
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return new Ast\PhpDoc\PhpDocTagNode($tag, $value);
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}
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public function parseTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens, string $tag) : Ast\PhpDoc\PhpDocTagValueNode
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{
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try {
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$tokens->pushSavePoint();
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switch ($tag) {
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case '@param':
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case '@phpstan-param':
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case '@psalm-param':
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$tagValue = $this->parseParamTagValue($tokens);
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break;
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case '@var':
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case '@phpstan-var':
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case '@psalm-var':
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$tagValue = $this->parseVarTagValue($tokens);
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break;
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case '@return':
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case '@phpstan-return':
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case '@psalm-return':
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$tagValue = $this->parseReturnTagValue($tokens);
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break;
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case '@throws':
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case '@phpstan-throws':
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$tagValue = $this->parseThrowsTagValue($tokens);
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break;
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case '@mixin':
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$tagValue = $this->parseMixinTagValue($tokens);
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break;
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case '@deprecated':
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$tagValue = $this->parseDeprecatedTagValue($tokens);
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break;
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case '@property':
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case '@property-read':
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case '@property-write':
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case '@phpstan-property':
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case '@phpstan-property-read':
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case '@phpstan-property-write':
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case '@psalm-property':
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case '@psalm-property-read':
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case '@psalm-property-write':
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$tagValue = $this->parsePropertyTagValue($tokens);
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break;
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case '@method':
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case '@phpstan-method':
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case '@psalm-method':
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$tagValue = $this->parseMethodTagValue($tokens);
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break;
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case '@template':
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case '@phpstan-template':
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case '@psalm-template':
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case '@template-covariant':
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case '@phpstan-template-covariant':
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case '@psalm-template-covariant':
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case '@template-contravariant':
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case '@phpstan-template-contravariant':
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case '@psalm-template-contravariant':
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$tagValue = $this->parseTemplateTagValue($tokens);
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break;
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case '@extends':
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case '@phpstan-extends':
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case '@template-extends':
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$tagValue = $this->parseExtendsTagValue('@extends', $tokens);
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break;
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case '@implements':
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case '@phpstan-implements':
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case '@template-implements':
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$tagValue = $this->parseExtendsTagValue('@implements', $tokens);
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break;
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case '@use':
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case '@phpstan-use':
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case '@template-use':
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$tagValue = $this->parseExtendsTagValue('@use', $tokens);
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break;
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case '@phpstan-type':
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case '@psalm-type':
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$tagValue = $this->parseTypeAliasTagValue($tokens);
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break;
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case '@phpstan-import-type':
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case '@psalm-import-type':
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$tagValue = $this->parseTypeAliasImportTagValue($tokens);
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break;
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case '@phpstan-assert':
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case '@phpstan-assert-if-true':
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case '@phpstan-assert-if-false':
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case '@psalm-assert':
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case '@psalm-assert-if-true':
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case '@psalm-assert-if-false':
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$tagValue = $this->parseAssertTagValue($tokens);
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break;
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default:
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$tagValue = new Ast\PhpDoc\GenericTagValueNode($this->parseOptionalDescription($tokens));
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break;
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}
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$tokens->dropSavePoint();
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} catch (\PHPStan\PhpDocParser\Parser\ParserException $e) {
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$tokens->rollback();
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$tagValue = new Ast\PhpDoc\InvalidTagValueNode($this->parseOptionalDescription($tokens), $e);
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}
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return $tagValue;
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}
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/**
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* @return Ast\PhpDoc\ParamTagValueNode|Ast\PhpDoc\TypelessParamTagValueNode
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*/
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private function parseParamTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\PhpDocTagValueNode
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{
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if ($tokens->isCurrentTokenType(Lexer::TOKEN_REFERENCE) || $tokens->isCurrentTokenType(Lexer::TOKEN_VARIADIC) || $tokens->isCurrentTokenType(Lexer::TOKEN_VARIABLE)) {
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$type = null;
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} else {
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$type = $this->typeParser->parse($tokens);
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}
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$isReference = $tokens->tryConsumeTokenType(Lexer::TOKEN_REFERENCE);
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$isVariadic = $tokens->tryConsumeTokenType(Lexer::TOKEN_VARIADIC);
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$parameterName = $this->parseRequiredVariableName($tokens);
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$description = $this->parseOptionalDescription($tokens);
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if ($type !== null) {
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return new Ast\PhpDoc\ParamTagValueNode($type, $isVariadic, $parameterName, $description, $isReference);
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}
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return new Ast\PhpDoc\TypelessParamTagValueNode($isVariadic, $parameterName, $description, $isReference);
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}
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private function parseVarTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\VarTagValueNode
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{
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$type = $this->typeParser->parse($tokens);
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$variableName = $this->parseOptionalVariableName($tokens);
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$description = $this->parseOptionalDescription($tokens, $variableName === '');
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return new Ast\PhpDoc\VarTagValueNode($type, $variableName, $description);
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}
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private function parseReturnTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\ReturnTagValueNode
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{
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$type = $this->typeParser->parse($tokens);
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$description = $this->parseOptionalDescription($tokens, \true);
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return new Ast\PhpDoc\ReturnTagValueNode($type, $description);
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}
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private function parseThrowsTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\ThrowsTagValueNode
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{
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$type = $this->typeParser->parse($tokens);
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$description = $this->parseOptionalDescription($tokens, \true);
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return new Ast\PhpDoc\ThrowsTagValueNode($type, $description);
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}
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private function parseMixinTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\MixinTagValueNode
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{
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$type = $this->typeParser->parse($tokens);
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$description = $this->parseOptionalDescription($tokens, \true);
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return new Ast\PhpDoc\MixinTagValueNode($type, $description);
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}
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private function parseDeprecatedTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\DeprecatedTagValueNode
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{
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$description = $this->parseOptionalDescription($tokens);
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return new Ast\PhpDoc\DeprecatedTagValueNode($description);
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}
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private function parsePropertyTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\PropertyTagValueNode
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{
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$type = $this->typeParser->parse($tokens);
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$parameterName = $this->parseRequiredVariableName($tokens);
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$description = $this->parseOptionalDescription($tokens);
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return new Ast\PhpDoc\PropertyTagValueNode($type, $parameterName, $description);
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}
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private function parseMethodTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\MethodTagValueNode
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{
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$isStatic = $tokens->tryConsumeTokenValue('static');
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$returnTypeOrMethodName = $this->typeParser->parse($tokens);
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if ($tokens->isCurrentTokenType(Lexer::TOKEN_IDENTIFIER)) {
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$returnType = $returnTypeOrMethodName;
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$methodName = $tokens->currentTokenValue();
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$tokens->next();
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} elseif ($returnTypeOrMethodName instanceof Ast\Type\IdentifierTypeNode) {
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$returnType = $isStatic ? new Ast\Type\IdentifierTypeNode('static') : null;
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$methodName = $returnTypeOrMethodName->name;
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$isStatic = \false;
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} else {
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$tokens->consumeTokenType(Lexer::TOKEN_IDENTIFIER);
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// will throw exception
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exit;
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}
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$parameters = [];
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$tokens->consumeTokenType(Lexer::TOKEN_OPEN_PARENTHESES);
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if (!$tokens->isCurrentTokenType(Lexer::TOKEN_CLOSE_PARENTHESES)) {
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$parameters[] = $this->parseMethodTagValueParameter($tokens);
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while ($tokens->tryConsumeTokenType(Lexer::TOKEN_COMMA)) {
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$parameters[] = $this->parseMethodTagValueParameter($tokens);
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}
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}
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$tokens->consumeTokenType(Lexer::TOKEN_CLOSE_PARENTHESES);
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$description = $this->parseOptionalDescription($tokens);
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return new Ast\PhpDoc\MethodTagValueNode($isStatic, $returnType, $methodName, $parameters, $description);
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}
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private function parseMethodTagValueParameter(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\MethodTagValueParameterNode
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{
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switch ($tokens->currentTokenType()) {
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case Lexer::TOKEN_IDENTIFIER:
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case Lexer::TOKEN_OPEN_PARENTHESES:
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case Lexer::TOKEN_NULLABLE:
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$parameterType = $this->typeParser->parse($tokens);
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break;
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default:
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$parameterType = null;
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}
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$isReference = $tokens->tryConsumeTokenType(Lexer::TOKEN_REFERENCE);
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$isVariadic = $tokens->tryConsumeTokenType(Lexer::TOKEN_VARIADIC);
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$parameterName = $tokens->currentTokenValue();
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$tokens->consumeTokenType(Lexer::TOKEN_VARIABLE);
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if ($tokens->tryConsumeTokenType(Lexer::TOKEN_EQUAL)) {
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$defaultValue = $this->constantExprParser->parse($tokens);
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} else {
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$defaultValue = null;
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}
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return new Ast\PhpDoc\MethodTagValueParameterNode($parameterType, $isReference, $isVariadic, $parameterName, $defaultValue);
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}
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private function parseTemplateTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\TemplateTagValueNode
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{
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$name = $tokens->currentTokenValue();
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$tokens->consumeTokenType(Lexer::TOKEN_IDENTIFIER);
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if ($tokens->tryConsumeTokenValue('of') || $tokens->tryConsumeTokenValue('as')) {
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$bound = $this->typeParser->parse($tokens);
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} else {
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$bound = null;
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}
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$description = $this->parseOptionalDescription($tokens);
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return new Ast\PhpDoc\TemplateTagValueNode($name, $bound, $description);
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}
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private function parseExtendsTagValue(string $tagName, \PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\PhpDocTagValueNode
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{
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$baseType = new IdentifierTypeNode($tokens->currentTokenValue());
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$tokens->consumeTokenType(Lexer::TOKEN_IDENTIFIER);
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$type = $this->typeParser->parseGeneric($tokens, $baseType);
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$description = $this->parseOptionalDescription($tokens);
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switch ($tagName) {
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case '@extends':
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return new Ast\PhpDoc\ExtendsTagValueNode($type, $description);
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case '@implements':
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return new Ast\PhpDoc\ImplementsTagValueNode($type, $description);
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case '@use':
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return new Ast\PhpDoc\UsesTagValueNode($type, $description);
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}
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throw new ShouldNotHappenException();
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}
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private function parseTypeAliasTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\TypeAliasTagValueNode
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{
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$alias = $tokens->currentTokenValue();
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$tokens->consumeTokenType(Lexer::TOKEN_IDENTIFIER);
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// support psalm-type syntax
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$tokens->tryConsumeTokenType(Lexer::TOKEN_EQUAL);
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$type = $this->typeParser->parse($tokens);
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return new Ast\PhpDoc\TypeAliasTagValueNode($alias, $type);
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}
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private function parseTypeAliasImportTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\TypeAliasImportTagValueNode
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{
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$importedAlias = $tokens->currentTokenValue();
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$tokens->consumeTokenType(Lexer::TOKEN_IDENTIFIER);
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$tokens->consumeTokenValue(Lexer::TOKEN_IDENTIFIER, 'from');
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$importedFrom = $tokens->currentTokenValue();
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$tokens->consumeTokenType(Lexer::TOKEN_IDENTIFIER);
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$importedAs = null;
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if ($tokens->tryConsumeTokenValue('as')) {
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$importedAs = $tokens->currentTokenValue();
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$tokens->consumeTokenType(Lexer::TOKEN_IDENTIFIER);
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}
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return new Ast\PhpDoc\TypeAliasImportTagValueNode($importedAlias, new IdentifierTypeNode($importedFrom), $importedAs);
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}
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/**
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* @return Ast\PhpDoc\AssertTagValueNode|Ast\PhpDoc\AssertTagPropertyValueNode|Ast\PhpDoc\AssertTagMethodValueNode
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*/
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private function parseAssertTagValue(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : Ast\PhpDoc\PhpDocTagValueNode
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{
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$isNegated = $tokens->tryConsumeTokenType(Lexer::TOKEN_NEGATED);
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$type = $this->typeParser->parse($tokens);
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$parameter = $this->parseAssertParameter($tokens);
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$description = $this->parseOptionalDescription($tokens);
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if (array_key_exists('method', $parameter)) {
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return new Ast\PhpDoc\AssertTagMethodValueNode($type, $parameter['parameter'], $parameter['method'], $isNegated, $description);
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} elseif (array_key_exists('property', $parameter)) {
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return new Ast\PhpDoc\AssertTagPropertyValueNode($type, $parameter['parameter'], $parameter['property'], $isNegated, $description);
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}
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return new Ast\PhpDoc\AssertTagValueNode($type, $parameter['parameter'], $isNegated, $description);
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}
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/**
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* @return array{parameter: string}|array{parameter: string, property: string}|array{parameter: string, method: string}
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*/
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private function parseAssertParameter(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : array
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{
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if ($tokens->isCurrentTokenType(Lexer::TOKEN_THIS_VARIABLE)) {
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$parameter = '$this';
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$requirePropertyOrMethod = \true;
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$tokens->next();
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} else {
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$parameter = $tokens->currentTokenValue();
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$requirePropertyOrMethod = \false;
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$tokens->consumeTokenType(Lexer::TOKEN_VARIABLE);
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}
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if ($requirePropertyOrMethod || $tokens->isCurrentTokenType(Lexer::TOKEN_ARROW)) {
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$tokens->consumeTokenType(Lexer::TOKEN_ARROW);
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$propertyOrMethod = $tokens->currentTokenValue();
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$tokens->consumeTokenType(Lexer::TOKEN_IDENTIFIER);
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if ($tokens->tryConsumeTokenType(Lexer::TOKEN_OPEN_PARENTHESES)) {
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$tokens->consumeTokenType(Lexer::TOKEN_CLOSE_PARENTHESES);
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return ['parameter' => $parameter, 'method' => $propertyOrMethod];
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}
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return ['parameter' => $parameter, 'property' => $propertyOrMethod];
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}
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return ['parameter' => $parameter];
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}
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private function parseOptionalVariableName(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : string
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{
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if ($tokens->isCurrentTokenType(Lexer::TOKEN_VARIABLE)) {
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$parameterName = $tokens->currentTokenValue();
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$tokens->next();
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} elseif ($tokens->isCurrentTokenType(Lexer::TOKEN_THIS_VARIABLE)) {
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$parameterName = '$this';
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$tokens->next();
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} else {
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$parameterName = '';
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}
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return $parameterName;
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}
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private function parseRequiredVariableName(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens) : string
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{
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$parameterName = $tokens->currentTokenValue();
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$tokens->consumeTokenType(Lexer::TOKEN_VARIABLE);
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return $parameterName;
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}
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private function parseOptionalDescription(\PHPStan\PhpDocParser\Parser\TokenIterator $tokens, bool $limitStartToken = \false) : string
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{
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if ($limitStartToken) {
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foreach (self::DISALLOWED_DESCRIPTION_START_TOKENS as $disallowedStartToken) {
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if (!$tokens->isCurrentTokenType($disallowedStartToken)) {
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continue;
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}
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$tokens->consumeTokenType(Lexer::TOKEN_OTHER);
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// will throw exception
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}
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if ($this->requireWhitespaceBeforeDescription && !$tokens->isCurrentTokenType(Lexer::TOKEN_PHPDOC_EOL, Lexer::TOKEN_CLOSE_PHPDOC, Lexer::TOKEN_END) && !$tokens->isPrecededByHorizontalWhitespace()) {
|
|
$tokens->consumeTokenType(Lexer::TOKEN_HORIZONTAL_WS);
|
|
// will throw exception
|
|
}
|
|
}
|
|
return $this->parseText($tokens)->text;
|
|
}
|
|
}
|