Support parsing PHP 7.4's arrow functions
This requires PHP 7.4-dev from May 2nd or later. Add various test cases of this working, as well as tests of error tolerance. Fixes #291
This commit is contained in:
Tyson Andre
Родитель
c74eb57ee5
Коммит
2836a80f87
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@ -0,0 +1,48 @@
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<?php
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/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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namespace Microsoft\PhpParser\Node\Expression;
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use Microsoft\PhpParser\FunctionLike;
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use Microsoft\PhpParser\Node;
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use Microsoft\PhpParser\Node\Expression;
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use Microsoft\PhpParser\Node\FunctionHeader;
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use Microsoft\PhpParser\Node\FunctionReturnType;
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use Microsoft\PhpParser\Token;
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class ArrowFunctionCreationExpression extends Expression implements FunctionLike {
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/** @var Token|null */
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public $staticModifier;
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use FunctionHeader, FunctionReturnType;
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/** @var Token `=>` */
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public $arrowToken;
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/** @var Node|Token */
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public $resultExpression;
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const CHILD_NAMES = [
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'staticModifier',
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// FunctionHeader
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'functionKeyword',
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'byRefToken',
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'name',
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'openParen',
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'parameters',
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'closeParen',
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// FunctionReturnType
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'colonToken',
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'questionToken',
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'returnType',
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// body
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'arrowToken',
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'resultExpression',
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];
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}
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@ -10,6 +10,7 @@ use Microsoft\PhpParser\NamespacedNameInterface;
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use Microsoft\PhpParser\NamespacedNameTrait;
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use Microsoft\PhpParser\Node;
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use Microsoft\PhpParser\Node\Expression\AnonymousFunctionCreationExpression;
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use Microsoft\PhpParser\Node\Expression\ArrowFunctionCreationExpression;
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use Microsoft\PhpParser\Node\Expression\CallExpression;
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use Microsoft\PhpParser\Node\Expression\ObjectCreationExpression;
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use Microsoft\PhpParser\ResolvedName;
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@ -180,6 +181,7 @@ class QualifiedName extends Node implements NamespacedNameInterface {
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$this->parent instanceof Node\Expression\MemberAccessExpression || $this->parent instanceof CallExpression ||
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$this->parent instanceof ObjectCreationExpression ||
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$this->parent instanceof Node\Expression\ScopedPropertyAccessExpression || $this->parent instanceof AnonymousFunctionCreationExpression ||
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$this->parent instanceof ArrowFunctionCreationExpression ||
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($this->parent instanceof Node\Expression\BinaryExpression && $this->parent->operator->kind === TokenKind::InstanceOfKeyword)
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);
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}
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@ -19,6 +19,7 @@ use Microsoft\PhpParser\Node\Expression\{
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AnonymousFunctionCreationExpression,
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ArgumentExpression,
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ArrayCreationExpression,
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ArrowFunctionCreationExpression,
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AssignmentExpression,
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BinaryExpression,
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BracedExpression,
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@ -563,7 +564,7 @@ class Parser {
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// function-static-declaration
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case TokenKind::StaticKeyword:
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// Check that this is not an anonymous-function-creation-expression
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if (!$this->lookahead([TokenKind::FunctionKeyword, TokenKind::OpenParenToken, TokenKind::ColonColonToken])) {
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if (!$this->lookahead([TokenKind::FunctionKeyword, TokenKind::FnKeyword, TokenKind::OpenParenToken, TokenKind::ColonColonToken])) {
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return $this->parseFunctionStaticDeclaration($parentNode);
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}
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break;
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@ -899,6 +900,7 @@ class Parser {
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// anonymous-function-creation-expression
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case TokenKind::StaticKeyword:
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case TokenKind::FunctionKeyword:
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case TokenKind::FnKeyword:
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return true;
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}
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return \in_array($token->kind, $this->reservedWordTokens, true);
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@ -978,12 +980,13 @@ class Parser {
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case TokenKind::StaticKeyword:
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// handle `static::`, `static(`, `new static;`, `instanceof static`
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if (($this->lookahead([TokenKind::ColonColonToken, TokenKind::OpenParenToken])) ||
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(!$this->lookahead(TokenKind::FunctionKeyword))
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(!$this->lookahead([TokenKind::FunctionKeyword, TokenKind::FnKeyword]))
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) {
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return $this->parseQualifiedName($parentNode);
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}
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// Could be `static function` anonymous function creation expression, so flow through
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case TokenKind::FunctionKeyword:
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case TokenKind::FnKeyword:
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return $this->parseAnonymousFunctionCreationExpression($parentNode);
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case TokenKind::TrueReservedWord:
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@ -3326,15 +3329,56 @@ class Parser {
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}
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private function parseAnonymousFunctionCreationExpression($parentNode) {
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$staticModifier = $this->eatOptional1(TokenKind::StaticKeyword);
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if ($this->getCurrentToken()->kind === TokenKind::FnKeyword) {
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return $this->parseArrowFunctionCreationExpression($parentNode, $staticModifier);
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}
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$anonymousFunctionCreationExpression = new AnonymousFunctionCreationExpression();
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$anonymousFunctionCreationExpression->parent = $parentNode;
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$anonymousFunctionCreationExpression->staticModifier = $this->eatOptional1(TokenKind::StaticKeyword);
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$anonymousFunctionCreationExpression->staticModifier = $staticModifier;
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$this->parseFunctionType($anonymousFunctionCreationExpression, false, true);
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return $anonymousFunctionCreationExpression;
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}
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private function parseArrowFunctionCreationExpression($parentNode, $staticModifier) : ArrowFunctionCreationExpression {
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$arrowFunction = new ArrowFunctionCreationExpression();
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$arrowFunction->parent = $parentNode;
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$arrowFunction->staticModifier = $staticModifier;
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$arrowFunction->functionKeyword = $this->eat1(TokenKind::FnKeyword);
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$arrowFunction->byRefToken = $this->eatOptional1(TokenKind::AmpersandToken);
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$arrowFunction->name = $this->eatOptional($this->nameOrKeywordOrReservedWordTokens);
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if (isset($arrowFunction->name)) {
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// Anonymous functions should not have names.
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// This is based on the code for AnonymousFunctionCreationExpression.
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$arrowFunction->name->kind = TokenKind::Name;
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$arrowFunction->name = new SkippedToken($arrowFunction->name); // TODO instead handle this during post-walk
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}
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$arrowFunction->openParen = $this->eat1(TokenKind::OpenParenToken);
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$arrowFunction->parameters = $this->parseDelimitedList(
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DelimitedList\ParameterDeclarationList::class,
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TokenKind::CommaToken,
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$this->isParameterStartFn(),
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$this->parseParameterFn(),
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$arrowFunction);
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$arrowFunction->closeParen = $this->eat1(TokenKind::CloseParenToken);
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if ($this->checkToken(TokenKind::ColonToken)) {
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$arrowFunction->colonToken = $this->eat1(TokenKind::ColonToken);
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$arrowFunction->questionToken = $this->eatOptional1(TokenKind::QuestionToken);
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$arrowFunction->returnType = $this->parseReturnTypeDeclaration($arrowFunction);
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}
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$arrowFunction->arrowToken = $this->eat1(TokenKind::DoubleArrowToken);
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$arrowFunction->resultExpression = $this->parseExpression($arrowFunction);
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return $arrowFunction;
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}
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private function parseAnonymousFunctionUseClause($parentNode) {
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$anonymousFunctionUseClause = new AnonymousFunctionUseClause();
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$anonymousFunctionUseClause->parent = $parentNode;
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@ -6,9 +6,10 @@
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namespace Microsoft\PhpParser;
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// If this predates PHP 7.4, T_COALESCE_EQUAL is unavailable.
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// If this predates PHP 7.4, T_COALESCE_EQUAL and T_FN are unavailable.
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// The replacement value is arbitrary - it just has to be different from other values of token constants.
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define(__NAMESPACE__ . '\T_COALESCE_EQUAL', defined('T_COALESCE_EQUAL') ? constant('T_COALESCE_EQUAL') : 'T_COALESCE_EQUAL');
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define(__NAMESPACE__ . '\T_FN', defined('T_FN') ? constant('T_FN') : 'T_FN');
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/**
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* Tokenizes content using PHP's built-in `token_get_all`, and converts to "lightweight" Token representation.
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@ -192,6 +193,7 @@ class PhpTokenizer implements TokenStreamProviderInterface {
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T_FINALLY => TokenKind::FinallyKeyword,
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T_FOR => TokenKind::ForKeyword,
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T_FOREACH => TokenKind::ForeachKeyword,
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T_FN => TokenKind::FnKeyword,
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T_FUNCTION => TokenKind::FunctionKeyword,
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T_GLOBAL => TokenKind::GlobalKeyword,
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T_GOTO => TokenKind::GotoKeyword,
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@ -85,6 +85,7 @@ class TokenKind {
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const XorKeyword = 165;
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const YieldKeyword = 166;
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const YieldFromKeyword = 167;
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const FnKeyword = 168;
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const OpenBracketToken = 201;
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const CloseBracketToken = 202;
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@ -43,6 +43,7 @@ class TokenStringMaps {
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"finally" => TokenKind::FinallyKeyword,
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"for" => TokenKind::ForKeyword,
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"foreach" => TokenKind::ForeachKeyword,
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"fn" => TokenKind::FnKeyword,
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"function" => TokenKind::FunctionKeyword,
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"global" => TokenKind::GlobalKeyword,
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"goto" => TokenKind::GotoKeyword,
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@ -0,0 +1,9 @@
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<?php
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$f = fn(array $x) => $x;
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fn(): int => $x;
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fn($x = 42) => yield $x;
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fn(&$x) => $x;
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fn&($x) => $x;
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fn($x, ...$rest) => $rest;
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static fn() => 1;
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$f = static fn() => 2;
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@ -0,0 +1 @@
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[]
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@ -0,0 +1,568 @@
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{
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"SourceFileNode": {
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"statementList": [
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{
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"InlineHtml": {
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"scriptSectionEndTag": null,
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"text": null,
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"scriptSectionStartTag": {
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"kind": "ScriptSectionStartTag",
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"textLength": 6
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}
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}
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},
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{
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"ExpressionStatement": {
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"expression": {
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"AssignmentExpression": {
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"leftOperand": {
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"Variable": {
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"dollar": null,
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"name": {
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"kind": "VariableName",
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"textLength": 2
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}
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}
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},
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"operator": {
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"kind": "EqualsToken",
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"textLength": 1
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},
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"byRef": null,
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"rightOperand": {
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"ArrowFunctionCreationExpression": {
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"staticModifier": null,
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"functionKeyword": {
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"kind": "FnKeyword",
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"textLength": 2
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},
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"byRefToken": null,
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"name": null,
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"openParen": {
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"kind": "OpenParenToken",
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"textLength": 1
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},
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"parameters": {
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"ParameterDeclarationList": {
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"children": [
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{
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"Parameter": {
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"questionToken": null,
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"typeDeclaration": {
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"kind": "ArrayKeyword",
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"textLength": 5
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},
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"byRefToken": null,
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"dotDotDotToken": null,
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"variableName": {
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"kind": "VariableName",
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"textLength": 2
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},
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"equalsToken": null,
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"default": null
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}
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}
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]
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}
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},
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"closeParen": {
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"kind": "CloseParenToken",
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"textLength": 1
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},
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"colonToken": null,
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"questionToken": null,
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"returnType": null,
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"arrowToken": {
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"kind": "DoubleArrowToken",
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"textLength": 2
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},
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"resultExpression": {
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"Variable": {
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||||
"dollar": null,
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"name": {
|
||||
"kind": "VariableName",
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||||
"textLength": 2
|
||||
}
|
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}
|
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}
|
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}
|
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}
|
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}
|
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},
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"semicolon": {
|
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"kind": "SemicolonToken",
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"textLength": 1
|
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}
|
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}
|
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},
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{
|
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"ExpressionStatement": {
|
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"expression": {
|
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"ArrowFunctionCreationExpression": {
|
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"staticModifier": null,
|
||||
"functionKeyword": {
|
||||
"kind": "FnKeyword",
|
||||
"textLength": 2
|
||||
},
|
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"byRefToken": null,
|
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"name": null,
|
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"openParen": {
|
||||
"kind": "OpenParenToken",
|
||||
"textLength": 1
|
||||
},
|
||||
"parameters": null,
|
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"closeParen": {
|
||||
"kind": "CloseParenToken",
|
||||
"textLength": 1
|
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},
|
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"colonToken": {
|
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"kind": "ColonToken",
|
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"textLength": 1
|
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},
|
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"questionToken": null,
|
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"returnType": {
|
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"kind": "IntReservedWord",
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"textLength": 3
|
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},
|
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"arrowToken": {
|
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"kind": "DoubleArrowToken",
|
||||
"textLength": 2
|
||||
},
|
||||
"resultExpression": {
|
||||
"Variable": {
|
||||
"dollar": null,
|
||||
"name": {
|
||||
"kind": "VariableName",
|
||||
"textLength": 2
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
},
|
||||
"semicolon": {
|
||||
"kind": "SemicolonToken",
|
||||
"textLength": 1
|
||||
}
|
||||
}
|
||||
},
|
||||
{
|
||||
"ExpressionStatement": {
|
||||
"expression": {
|
||||
"ArrowFunctionCreationExpression": {
|
||||
"staticModifier": null,
|
||||
"functionKeyword": {
|
||||
"kind": "FnKeyword",
|
||||
"textLength": 2
|
||||
},
|
||||
"byRefToken": null,
|
||||
"name": null,
|
||||
"openParen": {
|
||||
"kind": "OpenParenToken",
|
||||
"textLength": 1
|
||||
},
|
||||
"parameters": {
|
||||
"ParameterDeclarationList": {
|
||||
"children": [
|
||||
{
|
||||
"Parameter": {
|
||||
"questionToken": null,
|
||||
"typeDeclaration": null,
|
||||
"byRefToken": null,
|
||||
"dotDotDotToken": null,
|
||||
"variableName": {
|
||||
"kind": "VariableName",
|
||||
"textLength": 2
|
||||
},
|
||||
"equalsToken": {
|
||||
"kind": "EqualsToken",
|
||||
"textLength": 1
|
||||
},
|
||||
"default": {
|
||||
"NumericLiteral": {
|
||||
"children": {
|
||||
"kind": "IntegerLiteralToken",
|
||||
"textLength": 2
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
]
|
||||
}
|
||||
},
|
||||
"closeParen": {
|
||||
"kind": "CloseParenToken",
|
||||
"textLength": 1
|
||||
},
|
||||
"colonToken": null,
|
||||
"questionToken": null,
|
||||
"returnType": null,
|
||||
"arrowToken": {
|
||||
"kind": "DoubleArrowToken",
|
||||
"textLength": 2
|
||||
},
|
||||
"resultExpression": {
|
||||
"YieldExpression": {
|
||||
"yieldOrYieldFromKeyword": {
|
||||
"kind": "YieldKeyword",
|
||||
"textLength": 5
|
||||
},
|
||||
"arrayElement": {
|
||||
"ArrayElement": {
|
||||
"elementKey": null,
|
||||
"arrowToken": null,
|
||||
"byRef": null,
|
||||
"elementValue": {
|
||||
"Variable": {
|
||||
"dollar": null,
|
||||
"name": {
|
||||
"kind": "VariableName",
|
||||
"textLength": 2
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
},
|
||||
"semicolon": {
|
||||
"kind": "SemicolonToken",
|
||||
"textLength": 1
|
||||
}
|
||||
}
|
||||
},
|
||||
{
|
||||
"ExpressionStatement": {
|
||||
"expression": {
|
||||
"ArrowFunctionCreationExpression": {
|
||||
"staticModifier": null,
|
||||
"functionKeyword": {
|
||||
"kind": "FnKeyword",
|
||||
"textLength": 2
|
||||
},
|
||||
"byRefToken": null,
|
||||
"name": null,
|
||||
"openParen": {
|
||||
"kind": "OpenParenToken",
|
||||
"textLength": 1
|
||||
},
|
||||
"parameters": {
|
||||
"ParameterDeclarationList": {
|
||||
"children": [
|
||||
{
|
||||
"Parameter": {
|
||||
"questionToken": null,
|
||||
"typeDeclaration": null,
|
||||
"byRefToken": {
|
||||
"kind": "AmpersandToken",
|
||||
"textLength": 1
|
||||
},
|
||||
"dotDotDotToken": null,
|
||||
"variableName": {
|
||||
"kind": "VariableName",
|
||||
"textLength": 2
|
||||
},
|
||||
"equalsToken": null,
|
||||
"default": null
|
||||
}
|
||||
}
|
||||
]
|
||||
}
|
||||
},
|
||||
"closeParen": {
|
||||
"kind": "CloseParenToken",
|
||||
"textLength": 1
|
||||
},
|
||||
"colonToken": null,
|
||||
"questionToken": null,
|
||||
"returnType": null,
|
||||
"arrowToken": {
|
||||
"kind": "DoubleArrowToken",
|
||||
"textLength": 2
|
||||
},
|
||||
"resultExpression": {
|
||||
"Variable": {
|
||||
"dollar": null,
|
||||
"name": {
|
||||
"kind": "VariableName",
|
||||
"textLength": 2
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
},
|
||||
"semicolon": {
|
||||
"kind": "SemicolonToken",
|
||||
"textLength": 1
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@ -0,0 +1,9 @@
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<?php
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||||
|
|
@ -0,0 +1,56 @@
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|||
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@ -0,0 +1,729 @@
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||||
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|
||||
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||||
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||||
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||||
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||||
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|
||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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|
||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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|
||||
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||||
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||||
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||||
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||||
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|
||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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|
|
@ -0,0 +1,12 @@
|
|||
<?php
|
||||
$fn1 = fn(\stdClass $x) : stdClass => $x;
|
||||
$fn2 = fn(): int => ($x);
|
||||
$fn3 = fn($x = 42) => yield $x;
|
||||
$fn4 = fn(&$x) => $x;
|
||||
$fn5 = fn&(Ns\MyClass $x) : Ns\MyClass => $x;
|
||||
$fn = fn($str) => preg_match($regex, $str, $matches) && ($matches[1] % 7 == 0);
|
||||
$cb = fn() => fn() => $undef;
|
||||
$fn = fn() => call_user_func(function () use ($arg) {
|
||||
var_export($arg);
|
||||
return $arg;
|
||||
});
|
||||
|
|
@ -0,0 +1 @@
|
|||
[]
|
||||
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