BaseParser::traceDiscard() - Code Metrics - Inspection of "Setup AST lexer & parser" - phpDocumentor/ReflectionDocBlock - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#223)

by Jaap

created 2020-05-20 18:51 UTC

BaseParser::traceDiscard() A

↳ Parent: BaseParser

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	4
rs	10
c	0
b	0
f	0
cc	1
nc	1
nop	1

<?php
/**
 * This file is part of phpDocumentor.
 *
 *  For the full copyright and license information, please view the LICENSE
 *  file that was distributed with this source code.
 *
 *  @link      http://phpdoc.org
 */

declare(strict_types=1);

namespace phpDocumentor\Reflection;

use phpDocumentor\Reflection\Types\Context;
use RangeException;
use RuntimeException;
use function count;
use function implode;
use function sprintf;

abstract class BaseParser
{
    private const SYMBOL_NONE = -1;

    /*
     * The following members will be filled with generated parsing data:
     */

    /** @var int Size of $tokenToSymbol map */
    protected $tokenToSymbolMapSize;
    /** @var int Size of $action table */
    protected $actionTableSize;
    /** @var int Size of $goto table */
    protected $gotoTableSize;

    /** @var int Symbol number signifying an invalid token */
    protected $invalidSymbol;
    /** @var int Symbol number of error recovery token */
    protected $errorSymbol;
    /** @var int Action number signifying default action */
    protected $defaultAction;
    /** @var int Rule number signifying that an unexpected token was encountered */
    protected $unexpectedTokenRule;
    /** @var int states */
    protected $YY2TBLSTATE;
    /** @var int Number of non-leaf states */
    protected $numNonLeafStates;

    /** @var int[] Map of lexer tokens to internal symbols */
    protected $tokenToSymbol;
    /** @var string[] Map of symbols to their names */
    protected $symbolToName;
    /** @var string[] Names of the production rules (only necessary for debugging) */
    protected $productions;

    /**
     * @var int[] Map of states to a displacement into the $action table. The corresponding action for this
     *             state/symbol pair is $action[$actionBase[$state] + $symbol]. If $actionBase[$state] is 0, the
     * action is defaulted, i.e. $actionDefault[$state] should be used instead.
     */
    protected $actionBase;
    /** @var int[] Table of actions. Indexed according to $actionBase comment. */
    protected $action;
    /**
     * @var int[] Table indexed analogously to $action. If $actionCheck[$actionBase[$state] + $symbol] != $symbol
     *             then the action is defaulted, i.e. $actionDefault[$state] should be used instead.
     */
    protected $actionCheck;
    /** @var int[] Map of states to their default action */
    protected $actionDefault;
    /** @var callable[] Semantic action callbacks */
    protected $reduceCallbacks;


    /** @var TypeLexer */
    private $lexer;

    /** @var FqsenResolver */
    protected $fqsenResolver;

    /** @var Context */
    protected $context;

    /** @var Type|Type[]|null Temporary value containing the result of last semantic action (reduction) */
    protected $semValue;

    /** @var Type[] Semantic value stack (contains values of tokens and semantic action results) */
    protected $semStack;

    /**
     * @return void
     */
    //phpcs:ignore SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingNativeTypeHint
    abstract protected function initReduceCallbacks();

    public function __construct()
    {
        $this->lexer = new DocBlockLexer();

        $this->initReduceCallbacks();
    }

    public function parse(string $type)
    {
        $this->lexer->setInput($type);
        $this->lexer->moveNext();

        // Start off in the initial state and keep a stack of previous states
        $state = 0;
        $stateStack = [$state];
        $symbol = self::SYMBOL_NONE;

        // Semantic value stack (contains values of tokens and semantic action results)
        $this->semStack = [];
        $this->semValue = null;

        $stackPos = 0;

        while (true) {
            $this->traceNewState($state, $symbol);
            if ($this->actionBase[$state] === 0) {
                $rule = $this->actionDefault[$state];
            } else {
                if ($symbol === self::SYMBOL_NONE) {
                    $this->lexer->moveNext();
                    $tokenId    = $this->lexer->token['type'] ?? 0;
                    $tokenValue = $this->lexer->token['value'] ?? null;

                    // map the lexer token id to the internally used symbols
                    $symbol = $tokenId >= 0 && $tokenId < $this->tokenToSymbolMapSize
                        ? $this->tokenToSymbol[$tokenId]
                        : $this->invalidSymbol;

                    if ($symbol === $this->invalidSymbol) {
                        throw new RangeException(sprintf(
                            'The lexer returned an invalid token (id=%d, value=%s)',
                            $tokenId,
                            $tokenValue
                        ));
                    }

                    $this->traceRead($symbol, $tokenValue);
                }

                $idx = $this->actionBase[$state] + $symbol;
                if ((($idx >= 0 && $idx < $this->actionTableSize && $this->actionCheck[$idx] === $symbol)
                        || ($state < $this->YY2TBLSTATE
                            && ($idx = $this->actionBase[$state + $this->numNonLeafStates] + $symbol) >= 0
                            && $idx < $this->actionTableSize && $this->actionCheck[$idx] === $symbol))
                    && ($action = $this->action[$idx]) !== $this->defaultAction) {
                    if ($action > 0) {
                        /** shift */
                        $this->traceShift($symbol);

                        ++$stackPos;
                        $stateStack[$stackPos] = $state = $action;
                        $this->semStack[$stackPos] = $tokenValue;
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}
                        $symbol = self::SYMBOL_NONE;

                        if ($action < $this->numNonLeafStates) {
                            continue;
                        }

                        /* $yyn >= numNonLeafStates means shift-and-reduce */
                        $rule = $action - $this->numNonLeafStates;
                    } else {
                        $rule = -$action;
                    }
                } else {
                    $rule = $this->actionDefault[$state];
                }
            }

            for (;;) {
                if ($rule === 0) {
                    /* accept */
                    $this->traceAccept();

                    return $this->semValue;
                }

                if ($rule === $this->unexpectedTokenRule) {
                    /* error */
                    $msg = $this->getErrorMessage($symbol, $state);

                    throw new RuntimeException($msg);
                }

                /* reduce */
                $this->traceReduce($rule);
                $this->reduceCallbacks[$rule]($stackPos);

                $stackPos    -= $this->ruleToLength[$rule];
class MyClass { }

$x = new MyClass();
$x->foo = true;
                $nonTerminal = $this->ruleToNonTerminal[$rule];
class MyClass { }

$x = new MyClass();
$x->foo = true;
                $idx         = $this->gotoBase[$nonTerminal] + $stateStack[$stackPos];
class MyClass { }

$x = new MyClass();
$x->foo = true;
                if ($idx >= 0 && $idx < $this->gotoTableSize && $this->gotoCheck[$idx] === $nonTerminal) {
class MyClass { }

$x = new MyClass();
$x->foo = true;
                    $state = $this->goto[$idx];
class MyClass { }

$x = new MyClass();
$x->foo = true;
                } else {
                    $state = $this->gotoDefault[$nonTerminal];
class MyClass { }

$x = new MyClass();
$x->foo = true;
                }

                ++$stackPos;
                $stateStack[$stackPos]     = $state;
                $this->semStack[$stackPos] = $this->semValue;

                if ($state < $this->numNonLeafStates) {
                    break;
                }

                /* >= numNonLeafStates means shift-and-reduce */
                $rule = $state - $this->numNonLeafStates;
            }
        }

        throw new RuntimeException('Reached end of parser loop');
    }

    /**
     * Format error message including expected tokens.
     *
     * @param int $symbol Unexpected symbol
     * @param int $state  State at time of error
     *
     * @return string Formatted error message
     */
    protected function getErrorMessage(int $symbol, int $state) : string
    {
        $expectedString = '';
        if ($expected = $this->getExpectedTokens($state)) {
            $expectedString = ', expecting ' . implode(' or ', $expected);
        }

        return 'Docblock syntax error, unexpected ' . $this->symbolToName[$symbol] . $expectedString;
    }

    /**
     * Get limited number of expected tokens in given state.
     *
     * @param int $state State
     *
     * @return string[] Expected tokens. If too many, an empty array is returned.
     */
    protected function getExpectedTokens(int $state) : array
    {
        $expected = [];

        $base = $this->actionBase[$state];
        foreach ($this->symbolToName as $symbol => $name) {
            $idx = $base + $symbol;
            if ($idx < 0 || $idx >= $this->actionTableSize || ($this->actionCheck[$idx] !== $symbol
                    && $state >= $this->YY2TBLSTATE)
                || (isset($this->actionBase[$state + $this->numNonLeafStates]) &&
                    $idx = $this->actionBase[$state + $this->numNonLeafStates] + $symbol) < 0
                || $idx >= $this->actionTableSize ||
                (isset($this->actionCheck[$idx]) && $this->actionCheck[$idx] !== $symbol)
            ) {
                continue;
            }

            if (
                (isset($this->action[$idx]) &&
                    (
                        $this->action[$idx] === $this->unexpectedTokenRule
                        || $this->action[$idx] === $this->defaultAction
                    )
                )
                || $symbol === $this->errorSymbol
            ) {
                continue;
            }

            if (count($expected) === 4) {
                /* Too many expected tokens */
                return [];
            }

            $expected[] = $name;
        }

        return $expected;
    }

    protected function traceNewState($state, $symbol) : void
    {
        echo '% State ' . $state
            . ', Lookahead ' . ($symbol === self::SYMBOL_NONE ? '--none--' : $this->symbolToName[$symbol]) . "\n";
    }

    protected function traceRead($symbol, $value) : void
    {
        echo '% Reading ' . $this->symbolToName[$symbol] . " with value " . $value . "\n";
    }

    protected function traceShift($symbol) : void
    {
        echo '% Shift ' . $this->symbolToName[$symbol] . "\n";
    }

    protected function traceAccept() : void
    {
        echo "% Accepted.\n";
    }

    protected function traceReduce($n) : void
    {
        echo '% Reduce by (' . $n . ') ' . $this->productions[$n] . "\n";
    }

    protected function tracePop($state) : void
    {
        echo '% Recovering, uncovered state ' . $state . "\n";
    }

    protected function traceDiscard($symbol) : void
    {
        echo '% Discard ' . $this->symbolToName[$symbol] . "\n";
    }
}


1			<?php
2			/**
3			* This file is part of phpDocumentor.
4			*
5			* For the full copyright and license information, please view the LICENSE
6			* file that was distributed with this source code.
7			*
8			* @link http://phpdoc.org
9			*/
10
11			declare(strict_types=1);
12
13			namespace phpDocumentor\Reflection;
14
15			use phpDocumentor\Reflection\Types\Context;
16			use RangeException;
17			use RuntimeException;
18			use function count;
19			use function implode;
20			use function sprintf;
21
22			abstract class BaseParser
23			{
24			private const SYMBOL_NONE = -1;
25
26			/*
27			* The following members will be filled with generated parsing data:
28			*/
29
30			/** @var int Size of $tokenToSymbol map */
31			protected $tokenToSymbolMapSize;
32			/** @var int Size of $action table */
33			protected $actionTableSize;
34			/** @var int Size of $goto table */
35			protected $gotoTableSize;
36
37			/** @var int Symbol number signifying an invalid token */
38			protected $invalidSymbol;
39			/** @var int Symbol number of error recovery token */
40			protected $errorSymbol;
41			/** @var int Action number signifying default action */
42			protected $defaultAction;
43			/** @var int Rule number signifying that an unexpected token was encountered */
44			protected $unexpectedTokenRule;
45			/** @var int states */
46			protected $YY2TBLSTATE;
47			/** @var int Number of non-leaf states */
48			protected $numNonLeafStates;
49
50			/** @var int[] Map of lexer tokens to internal symbols */
51			protected $tokenToSymbol;
52			/** @var string[] Map of symbols to their names */
53			protected $symbolToName;
54			/** @var string[] Names of the production rules (only necessary for debugging) */
55			protected $productions;
56
57			/**
58			* @var int[] Map of states to a displacement into the $action table. The corresponding action for this
59			* state/symbol pair is $action[$actionBase[$state] + $symbol]. If $actionBase[$state] is 0, the
60			* action is defaulted, i.e. $actionDefault[$state] should be used instead.
61			*/
62			protected $actionBase;
63			/** @var int[] Table of actions. Indexed according to $actionBase comment. */
64			protected $action;
65			/**
66			* @var int[] Table indexed analogously to $action. If $actionCheck[$actionBase[$state] + $symbol] != $symbol
67			* then the action is defaulted, i.e. $actionDefault[$state] should be used instead.
68			*/
69			protected $actionCheck;
70			/** @var int[] Map of states to their default action */
71			protected $actionDefault;
72			/** @var callable[] Semantic action callbacks */
73			protected $reduceCallbacks;
74
75
76			/** @var TypeLexer */
77			private $lexer;
78
79			/** @var FqsenResolver */
80			protected $fqsenResolver;
81
82			/** @var Context */
83			protected $context;
84
85			/** @var Type\|Type[]\|null Temporary value containing the result of last semantic action (reduction) */
86			protected $semValue;
87
88			/** @var Type[] Semantic value stack (contains values of tokens and semantic action results) */
89			protected $semStack;
90
91			/**
92			* @return void
93			*/
94			//phpcs:ignore SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingNativeTypeHint
95			abstract protected function initReduceCallbacks();
96
97			public function __construct()
98			{
99			$this->lexer = new DocBlockLexer();
			0 ignored issues – show Documentation Bug introduced 2020-05-20 18:58 UTC by Report Bug Copy Issue Report It seems like `new \phpDocumentor\Reflection\DocBlockLexer()` of type `object<phpDocumentor\Reflection\DocBlockLexer>` is incompatible with the declared type `object<phpDocumentor\Reflection\TypeLexer>` of property `$lexer`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
100			$this->initReduceCallbacks();
101			}
102
103			public function parse(string $type)
104			{
105			$this->lexer->setInput($type);
106			$this->lexer->moveNext();
107
108			// Start off in the initial state and keep a stack of previous states
109			$state = 0;
110			$stateStack = [$state];
111			$symbol = self::SYMBOL_NONE;
112
113			// Semantic value stack (contains values of tokens and semantic action results)
114			$this->semStack = [];
115			$this->semValue = null;
116
117			$stackPos = 0;
118
119			while (true) {
120			$this->traceNewState($state, $symbol);
121			if ($this->actionBase[$state] === 0) {
122			$rule = $this->actionDefault[$state];
123			} else {
124			if ($symbol === self::SYMBOL_NONE) {
125			$this->lexer->moveNext();
126			$tokenId = $this->lexer->token['type'] ?? 0;
127			$tokenValue = $this->lexer->token['value'] ?? null;
128
129			// map the lexer token id to the internally used symbols
130			$symbol = $tokenId >= 0 && $tokenId < $this->tokenToSymbolMapSize
131			? $this->tokenToSymbol[$tokenId]
132			: $this->invalidSymbol;
133
134			if ($symbol === $this->invalidSymbol) {
135			throw new RangeException(sprintf(
136			'The lexer returned an invalid token (id=%d, value=%s)',
137			$tokenId,
138			$tokenValue
139			));
140			}
141
142			$this->traceRead($symbol, $tokenValue);
143			}
144
145			$idx = $this->actionBase[$state] + $symbol;
146			if ((($idx >= 0 && $idx < $this->actionTableSize && $this->actionCheck[$idx] === $symbol)
147			\|\| ($state < $this->YY2TBLSTATE
148			&& ($idx = $this->actionBase[$state + $this->numNonLeafStates] + $symbol) >= 0
149			&& $idx < $this->actionTableSize && $this->actionCheck[$idx] === $symbol))
150			&& ($action = $this->action[$idx]) !== $this->defaultAction) {
151			if ($action > 0) {
152			/** shift */
153			$this->traceShift($symbol);
154
155			++$stackPos;
156			$stateStack[$stackPos] = $state = $action;
157			$this->semStack[$stackPos] = $tokenValue;
			0 ignored issues – show Bug introduced 2020-05-20 18:58 UTC by Report Bug Copy Issue Report The variable `$tokenValue` does not seem to be defined for all execution paths leading up to this point. If you define a variable conditionally, it can happen that it is not defined for all execution paths. Let’s take a look at an example: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } // $x is potentially undefined here. echo $x; } In the above example, the variable `$x` is defined if you pass “foo” or “bar” as argument for `$a`. However, since the `switch` statement has no default case statement, if you pass any other value, the variable `$x` would be undefined. Available Fixes Check for existence of the variable explicitly: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } if (isset($x)) { // Make sure it's always set. echo $x; } } Define a default value for the variable: function myFunction($a) { $x = ''; // Set a default which gets overridden for certain paths. switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } echo $x; } Add a value for the missing path: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; // We add support for the missing case. default: $x = ''; break; } echo $x; } Loading history...
158			$symbol = self::SYMBOL_NONE;
159
160			if ($action < $this->numNonLeafStates) {
161			continue;
162			}
163
164			/* $yyn >= numNonLeafStates means shift-and-reduce */
165			$rule = $action - $this->numNonLeafStates;
166			} else {
167			$rule = -$action;
168			}
169			} else {
170			$rule = $this->actionDefault[$state];
171			}
172			}
173
174			for (;;) {
175			if ($rule === 0) {
176			/* accept */
177			$this->traceAccept();
178
179			return $this->semValue;
180			}
181
182			if ($rule === $this->unexpectedTokenRule) {
183			/* error */
184			$msg = $this->getErrorMessage($symbol, $state);
185
186			throw new RuntimeException($msg);
187			}
188
189			/* reduce */
190			$this->traceReduce($rule);
191			$this->reduceCallbacks[$rule]($stackPos);
192
193			$stackPos -= $this->ruleToLength[$rule];
			0 ignored issues – show Bug introduced 2020-05-20 18:58 UTC by Report Bug Copy Issue Report The property `ruleToLength` does not exist. Did you maybe forget to declare it? In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code: class MyClass { } $x = new MyClass(); $x->foo = true; Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: class MyClass { public $foo; } $x = new MyClass(); $x->foo = true; Loading history...
194			$nonTerminal = $this->ruleToNonTerminal[$rule];
			0 ignored issues – show Bug introduced 2020-05-20 18:58 UTC by Report Bug Copy Issue Report The property `ruleToNonTerminal` does not exist. Did you maybe forget to declare it? In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code: class MyClass { } $x = new MyClass(); $x->foo = true; Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: class MyClass { public $foo; } $x = new MyClass(); $x->foo = true; Loading history...
195			$idx = $this->gotoBase[$nonTerminal] + $stateStack[$stackPos];
			0 ignored issues – show Bug introduced 2020-05-20 18:58 UTC by Report Bug Copy Issue Report The property `gotoBase` does not exist. Did you maybe forget to declare it? In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code: class MyClass { } $x = new MyClass(); $x->foo = true; Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: class MyClass { public $foo; } $x = new MyClass(); $x->foo = true; Loading history...
196			if ($idx >= 0 && $idx < $this->gotoTableSize && $this->gotoCheck[$idx] === $nonTerminal) {
			0 ignored issues – show Bug introduced 2020-05-20 18:58 UTC by Report Bug Copy Issue Report The property `gotoCheck` does not exist. Did you maybe forget to declare it? In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code: class MyClass { } $x = new MyClass(); $x->foo = true; Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: class MyClass { public $foo; } $x = new MyClass(); $x->foo = true; Loading history...
197			$state = $this->goto[$idx];
			0 ignored issues – show Bug introduced 2020-05-20 18:58 UTC by Report Bug Copy Issue Report The property `goto` does not exist. Did you maybe forget to declare it? In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code: class MyClass { } $x = new MyClass(); $x->foo = true; Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: class MyClass { public $foo; } $x = new MyClass(); $x->foo = true; Loading history...
198			} else {
199			$state = $this->gotoDefault[$nonTerminal];
			0 ignored issues – show Bug introduced 2020-05-20 18:58 UTC by Report Bug Copy Issue Report The property `gotoDefault` does not exist. Did you maybe forget to declare it? In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code: class MyClass { } $x = new MyClass(); $x->foo = true; Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: class MyClass { public $foo; } $x = new MyClass(); $x->foo = true; Loading history...
200			}
201
202			++$stackPos;
203			$stateStack[$stackPos] = $state;
204			$this->semStack[$stackPos] = $this->semValue;
205
206			if ($state < $this->numNonLeafStates) {
207			break;
208			}
209
210			/* >= numNonLeafStates means shift-and-reduce */
211			$rule = $state - $this->numNonLeafStates;
212			}
213			}
214
215			throw new RuntimeException('Reached end of parser loop');
216			}
217
218			/**
219			* Format error message including expected tokens.
220			*
221			* @param int $symbol Unexpected symbol
222			* @param int $state State at time of error
223			*
224			* @return string Formatted error message
225			*/
226			protected function getErrorMessage(int $symbol, int $state) : string
227			{
228			$expectedString = '';
229			if ($expected = $this->getExpectedTokens($state)) {
230			$expectedString = ', expecting ' . implode(' or ', $expected);
231			}
232
233			return 'Docblock syntax error, unexpected ' . $this->symbolToName[$symbol] . $expectedString;
234			}
235
236			/**
237			* Get limited number of expected tokens in given state.
238			*
239			* @param int $state State
240			*
241			* @return string[] Expected tokens. If too many, an empty array is returned.
242			*/
243			protected function getExpectedTokens(int $state) : array
244			{
245			$expected = [];
246
247			$base = $this->actionBase[$state];
248			foreach ($this->symbolToName as $symbol => $name) {
249			$idx = $base + $symbol;
250			if ($idx < 0 \|\| $idx >= $this->actionTableSize \|\| ($this->actionCheck[$idx] !== $symbol
251			&& $state >= $this->YY2TBLSTATE)
252			\|\| (isset($this->actionBase[$state + $this->numNonLeafStates]) &&
253			$idx = $this->actionBase[$state + $this->numNonLeafStates] + $symbol) < 0
254			\|\| $idx >= $this->actionTableSize \|\|
255			(isset($this->actionCheck[$idx]) && $this->actionCheck[$idx] !== $symbol)
256			) {
257			continue;
258			}
259
260			if (
261			(isset($this->action[$idx]) &&
262			(
263			$this->action[$idx] === $this->unexpectedTokenRule
264			\|\| $this->action[$idx] === $this->defaultAction
265			)
266			)
267			\|\| $symbol === $this->errorSymbol
268			) {
269			continue;
270			}
271
272			if (count($expected) === 4) {
273			/* Too many expected tokens */
274			return [];
275			}
276
277			$expected[] = $name;
278			}
279
280			return $expected;
281			}
282
283			protected function traceNewState($state, $symbol) : void
284			{
285			echo '% State ' . $state
286			. ', Lookahead ' . ($symbol === self::SYMBOL_NONE ? '--none--' : $this->symbolToName[$symbol]) . "\n";
287			}
288
289			protected function traceRead($symbol, $value) : void
290			{
291			echo '% Reading ' . $this->symbolToName[$symbol] . " with value " . $value . "\n";
292			}
293
294			protected function traceShift($symbol) : void
295			{
296			echo '% Shift ' . $this->symbolToName[$symbol] . "\n";
297			}
298
299			protected function traceAccept() : void
300			{
301			echo "% Accepted.\n";
302			}
303
304			protected function traceReduce($n) : void
305			{
306			echo '% Reduce by (' . $n . ') ' . $this->productions[$n] . "\n";
307			}
308
309			protected function tracePop($state) : void
310			{
311			echo '% Recovering, uncovered state ' . $state . "\n";
312			}
313
314			protected function traceDiscard($symbol) : void
315			{
316			echo '% Discard ' . $this->symbolToName[$symbol] . "\n";
317			}
318			}
319

phpDocumentor / ReflectionDocBlock

Pull Request — master (#223)

BaseParser::traceDiscard() A

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