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