Parser::doGrammar() - Code Metrics - Inspection of "Fixed error for quoted char" - stenin-nikita/PHP-Yacc - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( af3941...7aa8d1 )

by Nikita

created 2018-02-02 19:49 UTC

Parser::doGrammar() F

↳ Parent: Parser

Complexity

Conditions	33
Paths	751

Size

Total Lines	126
Code Lines	98

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	33
eloc	98
nc	751
nop	0
dl	0
loc	126
rs	2.1014
c	0
b	0
f	0

How to fix Long Method Complexity

<?php
/**
 * This file is part of PHP-Yacc package.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
declare(strict_types=1);

namespace PhpYacc\Yacc;

use PhpYacc\Exception\ParseException;
use PhpYacc\Grammar\Context;
use PhpYacc\Grammar\Symbol;
use PhpYacc\Support\Utils;

/**
 * Class Parser.
 */
class Parser
{
    /**
     * @var Context
     */
    protected $context;

    /**
     * @var Lexer
     */
    protected $lexer;

    /**
     * @var MacroSet
     */
    protected $macros;

    /**
     * @var Symbol
     */
    protected $eofToken;

    /**
     * @var Symbol
     */
    protected $errorToken;

    /**
     * @var Symbol
     */
    protected $startPrime;

    /**
     * @var int
     */
    protected $currentPrecedence = 0;

    /**
     * Parser constructor.
     *
     * @param Lexer    $lexer
     * @param MacroSet $macros
     */
    public function __construct(Lexer $lexer, MacroSet $macros)
    {
        $this->lexer = $lexer;
        $this->macros = $macros;
    }

    /**
     * @param string       $code
     * @param Context|null $context
     *
     * @throws ParseException
     * @throws \PhpYacc\Exception\LexingException
     *
     * @return Context
     */
    public function parse(string $code, Context $context = null)
    {
        $this->context = $context ?: new Context();

        $this->lexer->startLexing($code, $this->context->filename);

        $this->doDeclaration();
        $this->doGrammar();

        $this->context->eofToken = $this->eofToken;
        $this->context->errorToken = $this->errorToken;
        $this->context->startPrime = $this->startPrime;

        $this->context->finish();

        return $this->context;
    }

    /**
     * @param array $symbols
     * @param int   $n
     * @param $delm
     * @param array $attribute
     *
     * @throws ParseException
     * @throws \PhpYacc\Exception\LexingException
     *
     * @return string
     */
    protected function copyAction(array $symbols, int $n, $delm, array $attribute): string
    {
        $tokens = [];
        $ct = 0;

        while (($token = $this->lexer->getRawToken())->getValue() !== $delm || $ct > 0) {
            switch ($token->getValue()) {
                case "\0":
                    throw ParseException::unexpected($token, Token::decode($delm));
                case '{':
                    $ct++;
                    break;
                case '}':
                    $ct--;
                    break;
            }
            $tokens[] = $token;
        }

        $expanded = $this->macros->apply($this->context, $symbols, $tokens, $n, $attribute);

        $action = \implode('', \array_map(function (Token $token) {
            return $token->getValue();
        }, $expanded));

        return $action;
    }

    /**
     * @throws ParseException
     * @throws \PhpYacc\Exception\LexingException
     */
    protected function doType()
    {
        $type = $this->getType();
        while (true) {
            if (($token = $this->lexer->getToken())->getValue() === ',') {
                continue;
            }
            if ($token->getType() !== Token::NAME && $token->getValue()[0] !== "'") {
                break;
            }
            $p = $this->context->internSymbol($token->getValue(), false);
            if ($type !== null) {
                $p->type = $type;
            }
        }
        $this->lexer->ungetToken();
    }

    /**
     * @throws ParseException
     * @throws \PhpYacc\Exception\LexingException
     */
    protected function doGrammar()
    {
        $attribute = [];
        $gbuffer = [null];
        $r = new Production('', 0);

        $r->body = [$this->startPrime];
        $this->context->addGram($r);

        $token = $this->lexer->getToken();

        while ($token->getType() !== Token::MARK && $token->getType() !== Token::EOF) {
            if ($token->getType() === Token::NAME) {
                if ($this->lexer->peek()->getValue()[0] === '@') {
                    $attribute[0] = $token->getValue();
                    $this->lexer->getToken();
                    $token = $this->lexer->getToken();
                } else {
                    $attribute[0] = null;
                }
                $gbuffer[0] = $this->context->internSymbol($token->getValue(), false);
                $attribute[1] = null;
                if ($gbuffer[0]->isterminal) {
                    throw new \RuntimeException("Nonterminal symbol expected: $token");
                } elseif (($tmp = $this->lexer->getToken())->getType() !== Token::COLON) {
                    throw new \RuntimeException("':' expected, $tmp found");
                }
                if ($this->context->startSymbol === null) {
                    $this->context->startSymbol = $gbuffer[0];
                }
            } elseif ($token->getValue()[0] === '|') {
                if (!$gbuffer[0]) {
                    throw new \RuntimeException("Syntax Error, unexpected $token");
                }
                $attribute[1] = null;
            } elseif ($token->getType() === Token::BEGININC) {
                $this->doCopy();
                $token = $this->lexer->getToken();
                continue;
            } else {
                throw new \RuntimeException("Syntax Error Unexpected $token");
            }

            $lastTerm = $this->startPrime;
            $action = null;
            $pos = 0;
            $i = 1;
            while (true) {
                $token = $this->lexer->getToken();

                if ($token->getValue()[0] === '=') {
                    $pos = $token->getLine();
                    if (($token = $this->lexer->getToken())->getValue()[0] === '{') {
                        $pos = $token->getLine();
                        $action = $this->copyAction($gbuffer, $i - 1, '}', $attribute);
                    } else {
                        $this->lexer->ungetToken();
                        $action = $this->copyAction($gbuffer, $i - 1, ';', $attribute);
                    }
                } elseif ($token->getValue()[0] === '{') {
                    $pos = $token->getLine();
                    $action = $this->copyAction($gbuffer, $i - 1, '}', $attribute);
                } elseif ($token->getType() === Token::PRECTOK) {
                    $lastTerm = $this->context->internSymbol($this->lexer->getToken()->getValue(), false);
                } elseif ($token->getType() === Token::NAME && $this->lexer->peek()->getType() === Token::COLON) {
                    break;
                } elseif ($token->getType() === Token::NAME && $this->lexer->peek()->getValue()[0] === '@') {
                    $attribute[$i] = $token->getValue();
                    $this->lexer->getToken();
                } elseif ($token->getType() === Token::NAME || $token->getType() === Token::STRING) {
                    if ($action) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
                        $g = $this->context->genNonTerminal();
                        $r = new Production($action, $pos);
                        $r->body = [$g];
                        $gbuffer[$i++] = $g;
                        $attribute[$i] = null;
                        $r->link = $r->body[0]->value;
                        $g->value = $this->context->addGram($r);
                    }
                    $gbuffer[$i++] = $w = $this->context->internSymbol($token->getValue(), false);
                    $attribute[$i] = null;
                    if ($w->isterminal) {
                        $lastTerm = $w;
                    }
                    $action = null;
                } else {
                    break;
                }
            }
            if (!$action) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
                if ($i > 1 && $gbuffer[0]->type !== null && $gbuffer[0]->type !== $gbuffer[1]->type) {
                    throw new ParseException('Stack types are different');
                }
            }
            $r = new Production($action, $pos);

            $r->body = \array_slice($gbuffer, 0, $i);
            $r->precedence = $lastTerm->precedence;
            $r->associativity = $lastTerm->associativity & Symbol::MASK;
            $r->link = $r->body[0]->value;
            $gbuffer[0]->value = $this->context->addGram($r);

            if ($token->getType() === Token::SEMICOLON) {
                $token = $this->lexer->getToken();
            }
        }

        $this->context->gram(0)->body[] = $this->context->startSymbol;
        $this->startPrime->value = null;
        foreach ($this->context->nonterminals as $key => $symbol) {
            if ($symbol === $this->startPrime) {
                continue;
            }
            if (($j = $symbol->value) === null) {
                throw new ParseException("Nonterminal {$symbol->name} used but not defined");
            }
            $k = null;
            while ($j) {
                $w = $j->link;
                $j->link = $k;
                $k = $j;
                $j = $w;
            }
            $symbol->value = $k;
        }
    }

    /**
     * @throws ParseException
     * @throws \PhpYacc\Exception\LexingException
     */
    protected function doDeclaration()
    {
        $this->eofToken = $this->context->internSymbol('EOF', true);
        $this->eofToken->value = 0;
        $this->errorToken = $this->context->internSymbol('error', true);
        $this->startPrime = $this->context->internSymbol("\$start", false);

        while (($token = $this->lexer->getToken())->getType() !== Token::MARK) {
            switch ($token->getType()) {
                case Token::TOKEN:
                case Token::RIGHT:
                case Token::LEFT:
                case Token::NONASSOC:
                    $this->doToken($token);
                    break;

                case Token::BEGININC:
                    $this->doCopy();
                    break;

                case Token::UNION:
                    $this->doUnion();
                    $this->context->unioned = true;
                    break;

                case Token::TYPE:
                    $this->doType();
                    break;

                case Token::EXPECT:
                    $token = $this->lexer->getToken();
                    if ($token->getType() === Token::NUMBER) {
                        $this->context->expected = (int) $token->getValue();
                    } else {
                        throw ParseException::unexpected($token, Token::NUMBER);
                    }
                    break;

                case Token::START:
                    $token = $this->lexer->getToken();
                    $this->context->startSymbol = $this->context->internSymbol($token->getValue(), false);
                    break;

                case Token::PURE_PARSER:
                    $this->context->pureFlag = true;
                    break;

                case Token::EOF:
                    throw new ParseException('No grammar given');
                default:
                    throw new ParseException("Syntax error, unexpected {$token->getValue()}");
            }
        }

        $base = 256;
        foreach ($this->context->terminals as $terminal) {
            if ($terminal === $this->context->eofToken) {
                continue;
            }
            if ($terminal->value < 0) {
                $terminal->value = $base++;
            }
        }
    }

    /**
     * @param Token $tag
     *
     * @throws ParseException
     * @throws \PhpYacc\Exception\LexingException
     */
    protected function doToken(Token $tag)
    {
        $preIncr = 0;
        $type = $this->getType();
        $token = $this->lexer->getToken();

        while ($token->getType() === Token::NAME || $token->getType() === Token::STRING) {
            $p = $this->context->internSymbol($token->getValue(), true);

            if ($p->name[0] === "'") {

                $p->value = Utils::characterValue(\mb_substr($p->name, 1, -1));
            }

            if ($type) {
                $p->type = $type;
            }

            switch ($tag->getType()) {
                case Token::LEFT:
                    $p->associativity |= Symbol::LEFT;
                    break;
                case Token::RIGHT:
                    $p->associativity |= Symbol::RIGHT;
                    break;
                case Token::NONASSOC:
                    $p->associativity |= Symbol::NON;
                    break;
            }

            if ($tag->getType() !== Token::TOKEN) {
                $p->precedence = $this->currentPrecedence;
                $preIncr = 1;
            }

            $token = $this->lexer->getToken();
            if ($token->getType() === Token::NUMBER) {
                if ($p->value === null) {
                    $p->value = (int) $token->getValue();
                } else {
                    throw new ParseException(sprintf('Unexpected Token::NUMBER as %s already has a value', $p->name));
                }
                $token = $this->lexer->getToken();
            }

            if ($token->getType() === Token::COMMA) {
                $token = $this->lexer->getToken();
            }
        }

        $this->lexer->ungetToken();
        $this->currentPrecedence += $preIncr;
    }

    /**
     * @throws ParseException
     * @throws \PhpYacc\Exception\LexingException
     *
     * @return null|Symbol
     */
    protected function getType()
    {
        $token = $this->lexer->getToken();

        if ($token->getValue()[0] !== '<') {
            $this->lexer->ungetToken();

            return null;
        }

        $ct = 1;
        $p = '';
        $token = $this->lexer->getToken();

        while (true) {
            switch ($token->getValue()[0]) {
                case "\n":
                case "\0":
                    throw ParseException::unexpected($token, '>');
                case '<':
                    $ct++;
                    break;
                case '>':
                    $ct--;
                    break;
            }

            if ($ct === 0) {
                break;
            }

            $p .= $token->getValue();
            $token = $this->lexer->getRawToken();
        }
        $this->context->unioned = true;

        return $this->context->intern($p);
    }

    /**
     * @return void
     */
    protected function doCopy()
    {
        // TODO
    }

    protected function doUnion()
    {
        // TODO
    }
}


1		<?php
2		/**
3		* This file is part of PHP-Yacc package.
4		*
5		* For the full copyright and license information, please view the LICENSE
6		* file that was distributed with this source code.
7		*/
8		declare(strict_types=1);
9
10		namespace PhpYacc\Yacc;
11
12		use PhpYacc\Exception\ParseException;
13		use PhpYacc\Grammar\Context;
14		use PhpYacc\Grammar\Symbol;
15		use PhpYacc\Support\Utils;
16
17		/**
18		* Class Parser.
19		*/
20		class Parser
21		{
22		/**
23		* @var Context
24		*/
25		protected $context;
26
27		/**
28		* @var Lexer
29		*/
30		protected $lexer;
31
32		/**
33		* @var MacroSet
34		*/
35		protected $macros;
36
37		/**
38		* @var Symbol
39		*/
40		protected $eofToken;
41
42		/**
43		* @var Symbol
44		*/
45		protected $errorToken;
46
47		/**
48		* @var Symbol
49		*/
50		protected $startPrime;
51
52		/**
53		* @var int
54		*/
55		protected $currentPrecedence = 0;
56
57		/**
58		* Parser constructor.
59		*
60		* @param Lexer $lexer
61		* @param MacroSet $macros
62		*/
63		public function __construct(Lexer $lexer, MacroSet $macros)
64		{
65		$this->lexer = $lexer;
66		$this->macros = $macros;
67		}
68
69		/**
70		* @param string $code
71		* @param Context\|null $context
72		*
73		* @throws ParseException
74		* @throws \PhpYacc\Exception\LexingException
75		*
76		* @return Context
77		*/
78		public function parse(string $code, Context $context = null)
79		{
80		$this->context = $context ?: new Context();
81
82		$this->lexer->startLexing($code, $this->context->filename);
83
84		$this->doDeclaration();
85		$this->doGrammar();
86
87		$this->context->eofToken = $this->eofToken;
88		$this->context->errorToken = $this->errorToken;
89		$this->context->startPrime = $this->startPrime;
90
91		$this->context->finish();
92
93		return $this->context;
94		}
95
96		/**
97		* @param array $symbols
98		* @param int $n
99		* @param $delm
100		* @param array $attribute
101		*
102		* @throws ParseException
103		* @throws \PhpYacc\Exception\LexingException
104		*
105		* @return string
106		*/
107		protected function copyAction(array $symbols, int $n, $delm, array $attribute): string
108		{
109		$tokens = [];
110		$ct = 0;
111
112		while (($token = $this->lexer->getRawToken())->getValue() !== $delm \|\| $ct > 0) {
113		switch ($token->getValue()) {
114		case "\0":
115		throw ParseException::unexpected($token, Token::decode($delm));
116		case '{':
117		$ct++;
118		break;
119		case '}':
120		$ct--;
121		break;
122		}
123		$tokens[] = $token;
124		}
125
126		$expanded = $this->macros->apply($this->context, $symbols, $tokens, $n, $attribute);
127
128		$action = \implode('', \array_map(function (Token $token) {
129		return $token->getValue();
130		}, $expanded));
131
132		return $action;
133		}
134
135		/**
136		* @throws ParseException
137		* @throws \PhpYacc\Exception\LexingException
138		*/
139		protected function doType()
140		{
141		$type = $this->getType();
142		while (true) {
143		if (($token = $this->lexer->getToken())->getValue() === ',') {
144		continue;
145		}
146		if ($token->getType() !== Token::NAME && $token->getValue()[0] !== "'") {
147		break;
148		}
149		$p = $this->context->internSymbol($token->getValue(), false);
150		if ($type !== null) {
151		$p->type = $type;
152		}
153		}
154		$this->lexer->ungetToken();
155		}
156
157		/**
158		* @throws ParseException
159		* @throws \PhpYacc\Exception\LexingException
160		*/
161		protected function doGrammar()
162		{
163		$attribute = [];
164		$gbuffer = [null];
165		$r = new Production('', 0);
166
167		$r->body = [$this->startPrime];
168		$this->context->addGram($r);
169
170		$token = $this->lexer->getToken();
171
172		while ($token->getType() !== Token::MARK && $token->getType() !== Token::EOF) {
173		if ($token->getType() === Token::NAME) {
174		if ($this->lexer->peek()->getValue()[0] === '@') {
175		$attribute[0] = $token->getValue();
176		$this->lexer->getToken();
177		$token = $this->lexer->getToken();
178		} else {
179		$attribute[0] = null;
180		}
181		$gbuffer[0] = $this->context->internSymbol($token->getValue(), false);
182		$attribute[1] = null;
183		if ($gbuffer[0]->isterminal) {
184		throw new \RuntimeException("Nonterminal symbol expected: $token");
185		} elseif (($tmp = $this->lexer->getToken())->getType() !== Token::COLON) {
186		throw new \RuntimeException("':' expected, $tmp found");
187		}
188		if ($this->context->startSymbol === null) {
189		$this->context->startSymbol = $gbuffer[0];
190		}
191		} elseif ($token->getValue()[0] === '\|') {
192		if (!$gbuffer[0]) {
193		throw new \RuntimeException("Syntax Error, unexpected $token");
194		}
195		$attribute[1] = null;
196		} elseif ($token->getType() === Token::BEGININC) {
197		$this->doCopy();
198		$token = $this->lexer->getToken();
199		continue;
200		} else {
201		throw new \RuntimeException("Syntax Error Unexpected $token");
202		}
203
204		$lastTerm = $this->startPrime;
205		$action = null;
206		$pos = 0;
207		$i = 1;
208		while (true) {
209		$token = $this->lexer->getToken();
210
211		if ($token->getValue()[0] === '=') {
212		$pos = $token->getLine();
213		if (($token = $this->lexer->getToken())->getValue()[0] === '{') {
214		$pos = $token->getLine();
215		$action = $this->copyAction($gbuffer, $i - 1, '}', $attribute);
216		} else {
217		$this->lexer->ungetToken();
218		$action = $this->copyAction($gbuffer, $i - 1, ';', $attribute);
219		}
220		} elseif ($token->getValue()[0] === '{') {
221		$pos = $token->getLine();
222		$action = $this->copyAction($gbuffer, $i - 1, '}', $attribute);
223		} elseif ($token->getType() === Token::PRECTOK) {
224		$lastTerm = $this->context->internSymbol($this->lexer->getToken()->getValue(), false);
225		} elseif ($token->getType() === Token::NAME && $this->lexer->peek()->getType() === Token::COLON) {
226		break;
227		} elseif ($token->getType() === Token::NAME && $this->lexer->peek()->getValue()[0] === '@') {
228		$attribute[$i] = $token->getValue();
229		$this->lexer->getToken();
230		} elseif ($token->getType() === Token::NAME \|\| $token->getType() === Token::STRING) {
231		if ($action) {
		0 ignored issues – show Bug Best Practice introduced 2017-12-27 06:59 UTC by Report Bug Copy Issue Report The expression `$action` of type `null\|string` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
232		$g = $this->context->genNonTerminal();
233		$r = new Production($action, $pos);
234		$r->body = [$g];
235		$gbuffer[$i++] = $g;
236		$attribute[$i] = null;
237		$r->link = $r->body[0]->value;
238		$g->value = $this->context->addGram($r);
239		}
240		$gbuffer[$i++] = $w = $this->context->internSymbol($token->getValue(), false);
241		$attribute[$i] = null;
242		if ($w->isterminal) {
243		$lastTerm = $w;
244		}
245		$action = null;
246		} else {
247		break;
248		}
249		}
250		if (!$action) {
		0 ignored issues – show Bug Best Practice introduced 2017-12-27 06:59 UTC by Report Bug Copy Issue Report The expression `$action` of type `null\|string` is loosely compared to `false`; this is ambiguous if the string can be empty. You might want to explicitly use `=== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
251		if ($i > 1 && $gbuffer[0]->type !== null && $gbuffer[0]->type !== $gbuffer[1]->type) {
252		throw new ParseException('Stack types are different');
253		}
254		}
255		$r = new Production($action, $pos);
256
257		$r->body = \array_slice($gbuffer, 0, $i);
258		$r->precedence = $lastTerm->precedence;
259		$r->associativity = $lastTerm->associativity & Symbol::MASK;
260		$r->link = $r->body[0]->value;
261		$gbuffer[0]->value = $this->context->addGram($r);
262
263		if ($token->getType() === Token::SEMICOLON) {
264		$token = $this->lexer->getToken();
265		}
266		}
267
268		$this->context->gram(0)->body[] = $this->context->startSymbol;
269		$this->startPrime->value = null;
270		foreach ($this->context->nonterminals as $key => $symbol) {
271		if ($symbol === $this->startPrime) {
272		continue;
273		}
274		if (($j = $symbol->value) === null) {
275		throw new ParseException("Nonterminal {$symbol->name} used but not defined");
276		}
277		$k = null;
278		while ($j) {
279		$w = $j->link;
280		$j->link = $k;
281		$k = $j;
282		$j = $w;
283		}
284		$symbol->value = $k;
285		}
286		}
287
288		/**
289		* @throws ParseException
290		* @throws \PhpYacc\Exception\LexingException
291		*/
292		protected function doDeclaration()
293		{
294		$this->eofToken = $this->context->internSymbol('EOF', true);
295		$this->eofToken->value = 0;
296		$this->errorToken = $this->context->internSymbol('error', true);
297		$this->startPrime = $this->context->internSymbol("\$start", false);
298
299		while (($token = $this->lexer->getToken())->getType() !== Token::MARK) {
300		switch ($token->getType()) {
301		case Token::TOKEN:
302		case Token::RIGHT:
303		case Token::LEFT:
304		case Token::NONASSOC:
305		$this->doToken($token);
306		break;
307
308		case Token::BEGININC:
309		$this->doCopy();
310		break;
311
312		case Token::UNION:
313		$this->doUnion();
314		$this->context->unioned = true;
315		break;
316
317		case Token::TYPE:
318		$this->doType();
319		break;
320
321		case Token::EXPECT:
322		$token = $this->lexer->getToken();
323		if ($token->getType() === Token::NUMBER) {
324		$this->context->expected = (int) $token->getValue();
325		} else {
326		throw ParseException::unexpected($token, Token::NUMBER);
327		}
328		break;
329
330		case Token::START:
331		$token = $this->lexer->getToken();
332		$this->context->startSymbol = $this->context->internSymbol($token->getValue(), false);
333		break;
334
335		case Token::PURE_PARSER:
336		$this->context->pureFlag = true;
337		break;
338
339		case Token::EOF:
340		throw new ParseException('No grammar given');
341		default:
342		throw new ParseException("Syntax error, unexpected {$token->getValue()}");
343		}
344		}
345
346		$base = 256;
347		foreach ($this->context->terminals as $terminal) {
348		if ($terminal === $this->context->eofToken) {
349		continue;
350		}
351		if ($terminal->value < 0) {
352		$terminal->value = $base++;
353		}
354		}
355		}
356
357		/**
358		* @param Token $tag
359		*
360		* @throws ParseException
361		* @throws \PhpYacc\Exception\LexingException
362		*/
363		protected function doToken(Token $tag)
364		{
365		$preIncr = 0;
366		$type = $this->getType();
367		$token = $this->lexer->getToken();
368
369		while ($token->getType() === Token::NAME \|\| $token->getType() === Token::STRING) {
370		$p = $this->context->internSymbol($token->getValue(), true);
371
372	View Code Duplication	if ($p->name[0] === "'") {
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373		$p->value = Utils::characterValue(\mb_substr($p->name, 1, -1));
374		}
375
376		if ($type) {
377		$p->type = $type;
378		}
379
380		switch ($tag->getType()) {
381		case Token::LEFT:
382		$p->associativity \|= Symbol::LEFT;
383		break;
384		case Token::RIGHT:
385		$p->associativity \|= Symbol::RIGHT;
386		break;
387		case Token::NONASSOC:
388		$p->associativity \|= Symbol::NON;
389		break;
390		}
391
392		if ($tag->getType() !== Token::TOKEN) {
393		$p->precedence = $this->currentPrecedence;
394		$preIncr = 1;
395		}
396
397		$token = $this->lexer->getToken();
398		if ($token->getType() === Token::NUMBER) {
399		if ($p->value === null) {
400		$p->value = (int) $token->getValue();
401		} else {
402		throw new ParseException(sprintf('Unexpected Token::NUMBER as %s already has a value', $p->name));
403		}
404		$token = $this->lexer->getToken();
405		}
406
407		if ($token->getType() === Token::COMMA) {
408		$token = $this->lexer->getToken();
409		}
410		}
411
412		$this->lexer->ungetToken();
413		$this->currentPrecedence += $preIncr;
414		}
415
416		/**
417		* @throws ParseException
418		* @throws \PhpYacc\Exception\LexingException
419		*
420		* @return null\|Symbol
421		*/
422		protected function getType()
423		{
424		$token = $this->lexer->getToken();
425
426		if ($token->getValue()[0] !== '<') {
427		$this->lexer->ungetToken();
428
429		return null;
430		}
431
432		$ct = 1;
433		$p = '';
434		$token = $this->lexer->getToken();
435
436		while (true) {
437		switch ($token->getValue()[0]) {
438		case "\n":
439		case "\0":
440		throw ParseException::unexpected($token, '>');
441		case '<':
442		$ct++;
443		break;
444		case '>':
445		$ct--;
446		break;
447		}
448
449		if ($ct === 0) {
450		break;
451		}
452
453		$p .= $token->getValue();
454		$token = $this->lexer->getRawToken();
455		}
456		$this->context->unioned = true;
457
458		return $this->context->intern($p);
459		}
460
461		/**
462		* @return void
463		*/
464		protected function doCopy()
465		{
466		// TODO
467		}
468
469		protected function doUnion()
470		{
471		// TODO
472		}
473		}
474

stenin-nikita / PHP-Yacc

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Parser::doGrammar() F

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