Parser::parseVariableReference() - Code Metrics - Inspection of "added php7.1 support" - Youshido/GraphQL - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#153)

by Portey

created 2017-06-20 16:39 UTC

Parser::parseVariableReference() B

↳ Parent: Parser

Complexity

Conditions	5
Paths	3

Size

Total Lines	21
Code Lines	11

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	10
CRAP Score	5.0187

Importance

Changes

Metric	Value
dl	0
loc	21
ccs	10
cts	11
cp	0.9091
rs	8.7624
c	0
b	0
f	0
cc	5
eloc	11
nc	3
nop	0
crap	5.0187

<?php
/*
* This file is a part of graphql-youshido project.
*
* @author Portey Vasil <[email protected]>
* created: 11/23/15 1:22 AM
*/

namespace Youshido\GraphQL\Parser;


use Youshido\GraphQL\Exception\Parser\SyntaxErrorException;
use Youshido\GraphQL\Parser\Ast\Argument;
use Youshido\GraphQL\Parser\Ast\ArgumentValue\InputList;
use Youshido\GraphQL\Parser\Ast\ArgumentValue\InputObject;
use Youshido\GraphQL\Parser\Ast\ArgumentValue\Literal;
use Youshido\GraphQL\Parser\Ast\ArgumentValue\Variable;
use Youshido\GraphQL\Parser\Ast\ArgumentValue\VariableReference;
use Youshido\GraphQL\Parser\Ast\Field;
use Youshido\GraphQL\Parser\Ast\Fragment;
use Youshido\GraphQL\Parser\Ast\FragmentReference;
use Youshido\GraphQL\Parser\Ast\Mutation;
use Youshido\GraphQL\Parser\Ast\Query;
use Youshido\GraphQL\Parser\Ast\TypedFragmentReference;

class Parser extends Tokenizer
{

    /** @var array */
    private $data = [];

    public function parse($source = null)
    {
        $this->init($source);

        while (!$this->end()) {
            $tokenType = $this->peek()->getType();

            switch ($tokenType) {
                case Token::TYPE_LBRACE:
                case Token::TYPE_QUERY:
                    foreach ($this->parseBody() as $query) {
                        $this->data['queries'][] = $query;
                    }

                    break;

                case Token::TYPE_MUTATION:
                    foreach ($this->parseBody(Token::TYPE_MUTATION) as $query) {
                        $this->data['mutations'][] = $query;
                    }

                    break;

                case Token::TYPE_FRAGMENT:
                    $this->data['fragments'][] = $this->parseFragment();

                    break;

                default:
                    throw new SyntaxErrorException('Incorrect request syntax', $this->getLocation());
            }
        }

        return $this->data;
    }

    private function init($source = null)
    {
        $this->initTokenizer($source);

        $this->data = [
            'queries'            => [],
            'mutations'          => [],
            'fragments'          => [],
            'fragmentReferences' => [],
            'variables'          => [],
            'variableReferences' => []
        ];
    }

    protected function parseBody($token = Token::TYPE_QUERY, $highLevel = true)
    {
        $fields = [];

        if ($highLevel && $this->peek()->getType() === $token) {
            $this->lex();
            $this->eat(Token::TYPE_IDENTIFIER);

            if ($this->match(Token::TYPE_LPAREN)) {
                $this->parseVariables();
            }
        }

        $this->lex();

        while (!$this->match(Token::TYPE_RBRACE) && !$this->end()) {
            if ($this->match(Token::TYPE_FRAGMENT_REFERENCE)) {
                $this->lex();

                if ($this->eat(Token::TYPE_ON)) {
                    $fields[] = $this->parseBodyItem(Token::TYPE_TYPED_FRAGMENT, $highLevel);
                } else {
                    $fields[] = $this->parseFragmentReference();
                }
            } else {
                $fields[] = $this->parseBodyItem($token, $highLevel);
            }
        }

        $this->expect(Token::TYPE_RBRACE);

        return $fields;
    }

    protected function parseVariables()
    {
        $this->eat(Token::TYPE_LPAREN);

        while (!$this->match(Token::TYPE_RPAREN) && !$this->end()) {
            $variableToken = $this->eat(Token::TYPE_VARIABLE);
            $nameToken     = $this->eatIdentifierToken();
            $this->eat(Token::TYPE_COLON);

            $isArray              = false;
            $arrayElementNullable = true;

            if ($this->match(Token::TYPE_LSQUARE_BRACE)) {
                $isArray = true;

                $this->eat(Token::TYPE_LSQUARE_BRACE);
                $type = $this->eatIdentifierToken()->getData();

                if ($this->match(Token::TYPE_REQUIRED)) {
                    $arrayElementNullable = false;
                    $this->eat(Token::TYPE_REQUIRED);
                }

                $this->eat(Token::TYPE_RSQUARE_BRACE);
            } else {
                $type = $this->eatIdentifierToken()->getData();
            }

            $required = false;
            if ($this->match(Token::TYPE_REQUIRED)) {
                $required = true;
                $this->eat(Token::TYPE_REQUIRED);
            }

             $variable = new Variable(
                $nameToken->getData(),
                $type,
                $required,
                $isArray,
                new Location($variableToken->getLine(), $variableToken->getColumn()),
                $arrayElementNullable
            );

            if ($this->match(Token::TYPE_EQUAL)) {
                $this->eat(Token::TYPE_EQUAL);
                $variable->setDefaultValue($this->parseValue());
            }

            $this->data['variables'][] = $variable;
        }

        $this->expect(Token::TYPE_RPAREN);
    }

    protected function expectMulti($types)
    {
        if ($this->matchMulti($types)) {
            return $this->lex();
        }

        throw $this->createUnexpectedException($this->peek());
    }

    protected function parseVariableReference()
    {
        $startToken = $this->expectMulti([Token::TYPE_VARIABLE]);

        if ($this->match(Token::TYPE_NUMBER) || $this->match(Token::TYPE_IDENTIFIER) || $this->match(Token::TYPE_QUERY)) {
            $name = $this->lex()->getData();

            $variable = $this->findVariable($name);
            if ($variable) {
                $variable->setUsed(true);
            }

            $variableReference = new VariableReference($name, $variable, new Location($startToken->getLine(), $startToken->getColumn()));

            $this->data['variableReferences'][] = $variableReference;

            return $variableReference;
        }

        throw $this->createUnexpectedException($this->peek());
    }

    protected function findVariable($name)
    {
        foreach ($this->data['variables'] as $variable) {
            /** @var $variable Variable */
            if ($variable->getName() == $name) {
                return $variable;
            }
        }

        return null;
    }

    protected function parseFragmentReference()
    {
        $nameToken         = $this->eatIdentifierToken();
        $fragmentReference = new FragmentReference($nameToken->getData(), new Location($nameToken->getLine(), $nameToken->getColumn()));

        $this->data['fragmentReferences'][] = $fragmentReference;

        return $fragmentReference;
    }

    protected function eatIdentifierToken()
    {
        return $this->expectMulti([
            Token::TYPE_IDENTIFIER,
            Token::TYPE_MUTATION,
            Token::TYPE_QUERY,
            Token::TYPE_FRAGMENT,
        ]);
    }

    protected function parseBodyItem($type = Token::TYPE_QUERY, $highLevel = true)
    {
        $nameToken = $this->eatIdentifierToken();
        $alias     = null;

        if ($this->eat(Token::TYPE_COLON)) {
            $alias     = $nameToken->getData();
            $nameToken = $this->eatIdentifierToken();
        }

        $bodyLocation = new Location($nameToken->getLine(), $nameToken->getColumn());
        $arguments    = $this->match(Token::TYPE_LPAREN) ? $this->parseArgumentList() : [];

        if ($this->match(Token::TYPE_LBRACE)) {
            $fields = $this->parseBody($type == Token::TYPE_TYPED_FRAGMENT ? Token::TYPE_QUERY : $type, false);

            if (!$fields) {

                throw $this->createUnexpectedTokenTypeException($this->lookAhead->getType());
            }

            if ($type == Token::TYPE_QUERY) {

                return new Query($nameToken->getData(), $alias, $arguments, $fields, $bodyLocation);
            } elseif ($type == Token::TYPE_TYPED_FRAGMENT) {
                return new TypedFragmentReference($nameToken->getData(), $fields, $bodyLocation);
            } else {
                return new Mutation($nameToken->getData(), $alias, $arguments, $fields, $bodyLocation);
            }
        } else {

            if ($highLevel && $type == Token::TYPE_MUTATION) {
                return new Mutation($nameToken->getData(), $alias, $arguments, [], $bodyLocation);
            } elseif ($highLevel && $type == Token::TYPE_QUERY) {
                return new Query($nameToken->getData(), $alias, $arguments, [], $bodyLocation);
            }

            return new Field($nameToken->getData(), $alias, $arguments, $bodyLocation);
        }
    }

    protected function parseArgumentList()
    {
        $args  = [];

        $this->expect(Token::TYPE_LPAREN);

        while (!$this->match(Token::TYPE_RPAREN) && !$this->end()) {
            $args[] = $this->parseArgument();
        }

        $this->expect(Token::TYPE_RPAREN);

        return $args;
    }

    protected function parseArgument()
    {
        $nameToken = $this->eatIdentifierToken();
        $this->expect(Token::TYPE_COLON);
        $value = $this->parseValue();

        return new Argument($nameToken->getData(), $value, new Location($nameToken->getLine(), $nameToken->getColumn()));
/**
 * @return array|string
 */
function returnsDifferentValues($x) {
    if ($x) {
        return 'foo';
    }

    return array();
}

$x = returnsDifferentValues($y);
if (is_array($x)) {
    // $x is an array.
}
    }

    /**
     * @return array|InputList|InputObject|Literal|VariableReference
     *
     * @throws SyntaxErrorException
     */
    protected function parseValue()
    {
        switch ($this->lookAhead->getType()) {
            case Token::TYPE_LSQUARE_BRACE:
                return $this->parseList();

            case Token::TYPE_LBRACE:
                return $this->parseObject();

            case Token::TYPE_VARIABLE:
                return $this->parseVariableReference();

            case Token::TYPE_NUMBER:
            case Token::TYPE_STRING:
            case Token::TYPE_IDENTIFIER:
            case Token::TYPE_NULL:
            case Token::TYPE_TRUE:
            case Token::TYPE_FALSE:
                $token = $this->lex();

                return new Literal($token->getData(), new Location($token->getLine(), $token->getColumn()));
        }

        throw $this->createUnexpectedException($this->lookAhead);
    }

    protected function parseList($createType = true)
    {
        $startToken = $this->eat(Token::TYPE_LSQUARE_BRACE);

        $list = [];
        while (!$this->match(Token::TYPE_RSQUARE_BRACE) && !$this->end()) {
            $list[] = $this->parseListValue();
        }

        $this->expect(Token::TYPE_RSQUARE_BRACE);

        return $createType ? new InputList($list, new Location($startToken->getLine(), $startToken->getColumn())) : $list;
    }

    protected function parseListValue()
    {
        switch ($this->lookAhead->getType()) {
            case Token::TYPE_NUMBER:
            case Token::TYPE_STRING:
            case Token::TYPE_TRUE:
            case Token::TYPE_FALSE:
            case Token::TYPE_NULL:
            case Token::TYPE_IDENTIFIER:
                return $this->expect($this->lookAhead->getType())->getData();

            case Token::TYPE_VARIABLE:
                return $this->parseVariableReference();

            case Token::TYPE_LBRACE:
                return $this->parseObject(true);

            case Token::TYPE_LSQUARE_BRACE:
                return $this->parseList(false);
        }

        throw new SyntaxErrorException('Can\'t parse argument', $this->getLocation());
    }

    protected function parseObject($createType = true)
    {
        $startToken = $this->eat(Token::TYPE_LBRACE);

        $object = [];
        while (!$this->match(Token::TYPE_RBRACE) && !$this->end()) {
            $key = $this->expectMulti([Token::TYPE_STRING, Token::TYPE_IDENTIFIER])->getData();
            $this->expect(Token::TYPE_COLON);
            $value = $this->parseListValue();

            $object[$key] = $value;
        }

        $this->eat(Token::TYPE_RBRACE);

        return $createType ? new InputObject($object, new Location($startToken->getLine(), $startToken->getColumn())) : $object;
    }

    protected function parseFragment()
    {
        $this->lex();
        $nameToken = $this->eatIdentifierToken();

        $this->eat(Token::TYPE_ON);

        $model  = $this->eatIdentifierToken();
        $fields = $this->parseBody(Token::TYPE_QUERY, false);

        return new Fragment($nameToken->getData(), $model->getData(), $fields, new Location($nameToken->getLine(), $nameToken->getColumn()));
    }

    protected function eat($type)
    {
        if ($this->match($type)) {
            return $this->lex();
        }

        return null;
    }

    protected function eatMulti($types)
    {
        if ($this->matchMulti($types)) {
            return $this->lex();
        }

        return null;
    }

    protected function matchMulti($types)
    {
        foreach ($types as $type) {
            if ($this->peek()->getType() == $type) {
                return true;
            }
        }

        return false;
    }
}


1			<?php
2			/*
3			* This file is a part of graphql-youshido project.
4			*
5			* @author Portey Vasil <[email protected]>
6			* created: 11/23/15 1:22 AM
7			*/
8
9			namespace Youshido\GraphQL\Parser;
10
11
12			use Youshido\GraphQL\Exception\Parser\SyntaxErrorException;
13			use Youshido\GraphQL\Parser\Ast\Argument;
14			use Youshido\GraphQL\Parser\Ast\ArgumentValue\InputList;
15			use Youshido\GraphQL\Parser\Ast\ArgumentValue\InputObject;
16			use Youshido\GraphQL\Parser\Ast\ArgumentValue\Literal;
17			use Youshido\GraphQL\Parser\Ast\ArgumentValue\Variable;
18			use Youshido\GraphQL\Parser\Ast\ArgumentValue\VariableReference;
19			use Youshido\GraphQL\Parser\Ast\Field;
20			use Youshido\GraphQL\Parser\Ast\Fragment;
21			use Youshido\GraphQL\Parser\Ast\FragmentReference;
22			use Youshido\GraphQL\Parser\Ast\Mutation;
23			use Youshido\GraphQL\Parser\Ast\Query;
24			use Youshido\GraphQL\Parser\Ast\TypedFragmentReference;
25
26			class Parser extends Tokenizer
27			{
28
29			/** @var array */
30			private $data = [];
31
32	98		public function parse($source = null)
33			{
34	98		$this->init($source);
35
36	98		while (!$this->end()) {
37	97		$tokenType = $this->peek()->getType();
38
39			switch ($tokenType) {
40	97		case Token::TYPE_LBRACE:
41	46		case Token::TYPE_QUERY:
42	79		foreach ($this->parseBody() as $query) {
43	72		$this->data['queries'][] = $query;
44			}
45
46	75		break;
47
48	26		case Token::TYPE_MUTATION:
49	17		foreach ($this->parseBody(Token::TYPE_MUTATION) as $query) {
50	12		$this->data['mutations'][] = $query;
51			}
52
53	12		break;
54
55	9		case Token::TYPE_FRAGMENT:
56	8		$this->data['fragments'][] = $this->parseFragment();
57
58	8		break;
59
60			default:
61	1		throw new SyntaxErrorException('Incorrect request syntax', $this->getLocation());
62			}
63			}
64
65	88		return $this->data;
66			}
67
68	98		private function init($source = null)
69			{
70	98		$this->initTokenizer($source);
71
72	98		$this->data = [
73			'queries' => [],
74			'mutations' => [],
75			'fragments' => [],
76			'fragmentReferences' => [],
77			'variables' => [],
78			'variableReferences' => []
79			];
80	98		}
81
82	96		protected function parseBody($token = Token::TYPE_QUERY, $highLevel = true)
83			{
84	96		$fields = [];
85
86	96		if ($highLevel && $this->peek()->getType() === $token) {
87	42		$this->lex();
88	42		$this->eat(Token::TYPE_IDENTIFIER);
89
90	42		if ($this->match(Token::TYPE_LPAREN)) {
91	13		$this->parseVariables();
92			}
93			}
94
95	96		$this->lex();
96
97	96		while (!$this->match(Token::TYPE_RBRACE) && !$this->end()) {
98	93		if ($this->match(Token::TYPE_FRAGMENT_REFERENCE)) {
99	10		$this->lex();
100
101	10		if ($this->eat(Token::TYPE_ON)) {
102	3		$fields[] = $this->parseBodyItem(Token::TYPE_TYPED_FRAGMENT, $highLevel);
103			} else {
104	10		$fields[] = $this->parseFragmentReference();
105			}
106			} else {
107	93		$fields[] = $this->parseBodyItem($token, $highLevel);
108			}
109			}
110
111	88		$this->expect(Token::TYPE_RBRACE);
112
113	88		return $fields;
114			}
115
116	13		protected function parseVariables()
117			{
118	13		$this->eat(Token::TYPE_LPAREN);
119
120	13		while (!$this->match(Token::TYPE_RPAREN) && !$this->end()) {
121	13		$variableToken = $this->eat(Token::TYPE_VARIABLE);
122	13		$nameToken = $this->eatIdentifierToken();
123	13		$this->eat(Token::TYPE_COLON);
124
125	13		$isArray = false;
126	13		$arrayElementNullable = true;
127
128	13		if ($this->match(Token::TYPE_LSQUARE_BRACE)) {
129	3		$isArray = true;
130
131	3		$this->eat(Token::TYPE_LSQUARE_BRACE);
132	3		$type = $this->eatIdentifierToken()->getData();
133
134	3		if ($this->match(Token::TYPE_REQUIRED)) {
135	2		$arrayElementNullable = false;
136	2		$this->eat(Token::TYPE_REQUIRED);
137			}
138
139	3		$this->eat(Token::TYPE_RSQUARE_BRACE);
140			} else {
141	12		$type = $this->eatIdentifierToken()->getData();
142			}
143
144	13		$required = false;
145	13		if ($this->match(Token::TYPE_REQUIRED)) {
146	2		$required = true;
147	2		$this->eat(Token::TYPE_REQUIRED);
148			}
149
150	13		$variable = new Variable(
151	13		$nameToken->getData(),
152			$type,
153			$required,
154			$isArray,
155	13		new Location($variableToken->getLine(), $variableToken->getColumn()),
156	13		$arrayElementNullable
157			);
158
159	13		if ($this->match(Token::TYPE_EQUAL)) {
160	1		$this->eat(Token::TYPE_EQUAL);
161	1		$variable->setDefaultValue($this->parseValue());
162			}
163
164	13		$this->data['variables'][] = $variable;
165			}
166
167	13		$this->expect(Token::TYPE_RPAREN);
168	13		}
169
170	93		protected function expectMulti($types)
171			{
172	93		if ($this->matchMulti($types)) {
173	93		return $this->lex();
174			}
175
176	2		throw $this->createUnexpectedException($this->peek());
177			}
178
179	12		protected function parseVariableReference()
180			{
181	12		$startToken = $this->expectMulti([Token::TYPE_VARIABLE]);
182
183	12		if ($this->match(Token::TYPE_NUMBER) \|\| $this->match(Token::TYPE_IDENTIFIER) \|\| $this->match(Token::TYPE_QUERY)) {
184	12		$name = $this->lex()->getData();
185
186	12		$variable = $this->findVariable($name);
187	12		if ($variable) {
188	12		$variable->setUsed(true);
189			}
190
191	12		$variableReference = new VariableReference($name, $variable, new Location($startToken->getLine(), $startToken->getColumn()));
192
193	12		$this->data['variableReferences'][] = $variableReference;
194
195	12		return $variableReference;
196			}
197
198			throw $this->createUnexpectedException($this->peek());
199			}
200
201	12		protected function findVariable($name)
202			{
203	12		foreach ($this->data['variables'] as $variable) {
204			/** @var $variable Variable */
205	12		if ($variable->getName() == $name) {
206	12		return $variable;
207			}
208			}
209
210			return null;
211			}
212
213	8		protected function parseFragmentReference()
214			{
215	8		$nameToken = $this->eatIdentifierToken();
216	8		$fragmentReference = new FragmentReference($nameToken->getData(), new Location($nameToken->getLine(), $nameToken->getColumn()));
217
218	8		$this->data['fragmentReferences'][] = $fragmentReference;
219
220	8		return $fragmentReference;
221			}
222
223	93		protected function eatIdentifierToken()
224			{
225	93		return $this->expectMulti([
226	93		Token::TYPE_IDENTIFIER,
227	93		Token::TYPE_MUTATION,
228	93		Token::TYPE_QUERY,
229	93		Token::TYPE_FRAGMENT,
230			]);
231			}
232
233	93		protected function parseBodyItem($type = Token::TYPE_QUERY, $highLevel = true)
234			{
235	93		$nameToken = $this->eatIdentifierToken();
236	93		$alias = null;
237
238	93		if ($this->eat(Token::TYPE_COLON)) {
239	17		$alias = $nameToken->getData();
240	17		$nameToken = $this->eatIdentifierToken();
241			}
242
243	93		$bodyLocation = new Location($nameToken->getLine(), $nameToken->getColumn());
244	93		$arguments = $this->match(Token::TYPE_LPAREN) ? $this->parseArgumentList() : [];
245
246	86		if ($this->match(Token::TYPE_LBRACE)) {
247	57		$fields = $this->parseBody($type == Token::TYPE_TYPED_FRAGMENT ? Token::TYPE_QUERY : $type, false);
248
249	56		if (!$fields) {
			0 ignored issues – show Bug Best Practice introduced 2016-11-01 14:21 UTC by Report Bug Copy Issue Report The expression `$fields` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
250	3		throw $this->createUnexpectedTokenTypeException($this->lookAhead->getType());
251			}
252
253	55	View Code Duplication	if ($type == Token::TYPE_QUERY) {
			0 ignored issues – show Duplication introduced 2016-05-21 01:18 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
254	53		return new Query($nameToken->getData(), $alias, $arguments, $fields, $bodyLocation);
255	6		} elseif ($type == Token::TYPE_TYPED_FRAGMENT) {
256	3		return new TypedFragmentReference($nameToken->getData(), $fields, $bodyLocation);
257			} else {
258	3		return new Mutation($nameToken->getData(), $alias, $arguments, $fields, $bodyLocation);
259			}
260		View Code Duplication	} else {
			0 ignored issues – show Duplication introduced 2016-05-21 01:18 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
261	84		if ($highLevel && $type == Token::TYPE_MUTATION) {
262	10		return new Mutation($nameToken->getData(), $alias, $arguments, [], $bodyLocation);
263	75		} elseif ($highLevel && $type == Token::TYPE_QUERY) {
264	24		return new Query($nameToken->getData(), $alias, $arguments, [], $bodyLocation);
265			}
266
267	55		return new Field($nameToken->getData(), $alias, $arguments, $bodyLocation);
268			}
269			}
270
271	56		protected function parseArgumentList()
272			{
273	56		$args = [];
274
275	56		$this->expect(Token::TYPE_LPAREN);
276
277	56		while (!$this->match(Token::TYPE_RPAREN) && !$this->end()) {
278	56		$args[] = $this->parseArgument();
279			}
280
281	50		$this->expect(Token::TYPE_RPAREN);
282
283	49		return $args;
284			}
285
286	56		protected function parseArgument()
287			{
288	56		$nameToken = $this->eatIdentifierToken();
289	56		$this->expect(Token::TYPE_COLON);
290	55		$value = $this->parseValue();
291
292	51		return new Argument($nameToken->getData(), $value, new Location($nameToken->getLine(), $nameToken->getColumn()));
			0 ignored issues – show Bug introduced 2016-11-19 05:02 UTC by Report Bug Copy Issue Report It seems like `$value` defined by `$this->parseValue()` on line `290` can also be of type `array`; however, `Youshido\GraphQL\Parser\...Argument::__construct()` does only seem to accept `object<Youshido\GraphQL\...erfaces\ValueInterface>`, maybe add an additional type check? If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check: /** * @return array\|string */ function returnsDifferentValues($x) { if ($x) { return 'foo'; } return array(); } $x = returnsDifferentValues($y); if (is_array($x)) { // $x is an array. } If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue. Loading history...
293			}
294
295			/**
296			* @return array\|InputList\|InputObject\|Literal\|VariableReference
297			*
298			* @throws SyntaxErrorException
299			*/
300	55		protected function parseValue()
301			{
302	55		switch ($this->lookAhead->getType()) {
303	55		case Token::TYPE_LSQUARE_BRACE:
304	7		return $this->parseList();
305
306	48		case Token::TYPE_LBRACE:
307	8		return $this->parseObject();
308
309	40		case Token::TYPE_VARIABLE:
310	12		return $this->parseVariableReference();
311
312	33		case Token::TYPE_NUMBER:
313	25		case Token::TYPE_STRING:
314	11		case Token::TYPE_IDENTIFIER:
315	8		case Token::TYPE_NULL:
316	5		case Token::TYPE_TRUE:
317	1		case Token::TYPE_FALSE:
318	32		$token = $this->lex();
319
320	32		return new Literal($token->getData(), new Location($token->getLine(), $token->getColumn()));
321			}
322
323	1		throw $this->createUnexpectedException($this->lookAhead);
324			}
325
326	9		protected function parseList($createType = true)
327			{
328	9		$startToken = $this->eat(Token::TYPE_LSQUARE_BRACE);
329
330	9		$list = [];
331	9		while (!$this->match(Token::TYPE_RSQUARE_BRACE) && !$this->end()) {
332	9		$list[] = $this->parseListValue();
333			}
334
335	8		$this->expect(Token::TYPE_RSQUARE_BRACE);
336
337	8		return $createType ? new InputList($list, new Location($startToken->getLine(), $startToken->getColumn())) : $list;
338			}
339
340	15		protected function parseListValue()
341			{
342	15		switch ($this->lookAhead->getType()) {
343	15		case Token::TYPE_NUMBER:
344	11		case Token::TYPE_STRING:
345	9		case Token::TYPE_TRUE:
346	9		case Token::TYPE_FALSE:
347	9		case Token::TYPE_NULL:
348	6		case Token::TYPE_IDENTIFIER:
349	14		return $this->expect($this->lookAhead->getType())->getData();
350
351	5		case Token::TYPE_VARIABLE:
352			return $this->parseVariableReference();
353
354	5		case Token::TYPE_LBRACE:
355	4		return $this->parseObject(true);
356
357	3		case Token::TYPE_LSQUARE_BRACE:
358	2		return $this->parseList(false);
359			}
360
361	1		throw new SyntaxErrorException('Can\'t parse argument', $this->getLocation());
362			}
363
364	9		protected function parseObject($createType = true)
365			{
366	9		$startToken = $this->eat(Token::TYPE_LBRACE);
367
368	9		$object = [];
369	9		while (!$this->match(Token::TYPE_RBRACE) && !$this->end()) {
370	9		$key = $this->expectMulti([Token::TYPE_STRING, Token::TYPE_IDENTIFIER])->getData();
371	9		$this->expect(Token::TYPE_COLON);
372	9		$value = $this->parseListValue();
373
374	9		$object[$key] = $value;
375			}
376
377	7		$this->eat(Token::TYPE_RBRACE);
378
379	7		return $createType ? new InputObject($object, new Location($startToken->getLine(), $startToken->getColumn())) : $object;
380			}
381
382	8		protected function parseFragment()
383			{
384	8		$this->lex();
385	8		$nameToken = $this->eatIdentifierToken();
386
387	8		$this->eat(Token::TYPE_ON);
388
389	8		$model = $this->eatIdentifierToken();
390	8		$fields = $this->parseBody(Token::TYPE_QUERY, false);
391
392	8		return new Fragment($nameToken->getData(), $model->getData(), $fields, new Location($nameToken->getLine(), $nameToken->getColumn()));
393			}
394
395	95		protected function eat($type)
396			{
397	95		if ($this->match($type)) {
398	48		return $this->lex();
399			}
400
401	90		return null;
402			}
403
404			protected function eatMulti($types)
405			{
406			if ($this->matchMulti($types)) {
407			return $this->lex();
408			}
409
410			return null;
411			}
412
413	93		protected function matchMulti($types)
414			{
415	93		foreach ($types as $type) {
416	93		if ($this->peek()->getType() == $type) {
417	93		return true;
418			}
419			}
420
421	2		return false;
422			}
423			}
424

Youshido / GraphQL

Pull Request — master (#153)

Parser::parseVariableReference() B

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