Defer::diff() - Code Metrics - Inspection of "update documentation" - Innmind/Immutable - Measure and Improve Code Quality continuously with Scrutinizer

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Push — develop ( 7af216...ebf010 )

by Baptiste

created 2019-12-08 17:13 UTC

Defer::diff() A

↳ Parent: Project

Complexity

Conditions	2
Paths	1

Size

Total Lines	16
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	9
CRAP Score	2

Importance

Changes	1
Bugs	0	Features	1

Metric	Value
cc	2
eloc	9
c	1
b	0
f	1
nc	1
nop	1
dl	0
loc	16
ccs	9
cts	9
cp	1
crap	2
rs	9.9666

<?php
declare(strict_types = 1);

namespace Innmind\Immutable\Set;

use Innmind\Immutable\{
    Map,
    Sequence,
    Set,
    Type,
    ValidateArgument,
    Str,
    Exception\CannotGroupEmptyStructure,
};

/**
 * @template T
 */
final class Defer implements Implementation
{
    private string $type;
    private ValidateArgument $validate;
    private Sequence\Implementation $values;

    /**
     * @param \Generator<T> $generator
     */
    public function __construct(string $type, \Generator $generator)
    {
        $this->type = $type;
        $this->validate = Type::of($type);
        $this->values = (new Sequence\Defer($type, $generator))->distinct();
    }

    public function type(): string
    {
        return $this->type;
    }

    public function size(): int
    {
        return $this->values->size();
    }

    /**
     * {@inheritdoc}
     */
    public function count(): int
    {
        return $this->values->size();
    }

    /**
     * @return \Iterator<T>
     */
    public function iterator(): \Iterator
    {
        return $this->values->iterator();
    }

    /**
     * @param Implementation<T> $set
     *
     * @return self<T>
     */
    public function intersect(Implementation $set): self
    {
        if ($this === $set) {
            // this is necessary as the manipulation of the same iterator below
            // leads to unexpected behaviour
            return $this;
        }

        $self = clone $this;
        $self->values = $this->values->intersect(
            new Sequence\Defer(
                $this->type,
                (static function(\Iterator $values): \Generator {
                    /** @var T $value */
                    foreach ($values as $value) {
                        yield $value;
                    }
                })($set->iterator()),
            ),
        );

        return $self;
    }

    /**
     * @param T $element
     *
     * @return self<T>
     */
    public function __invoke($element): self
    {
        $set = clone $this;
        $set->values = ($this->values)($element)->distinct();

        return $set;
    }

    /**
     * @param T $element
     */
    public function contains($element): bool
    {
        return $this->values->contains($element);
    }

    /**
     * @param T $element
     *
     * @return self<T>
     */
    public function remove($element): self
    {
        if (!$this->contains($element)) {
            return $this;
        }

        $index = $this->values->indexOf($element);
        $set = clone $this;
        $set->values = $this
            ->values
            ->slice(0, $index)
            ->append($this->values->slice($index + 1, $this->size()));

        return $set;
    }

    /**
     * @param Implementation<T> $set
     *
     * @return self<T>
     */
    public function diff(Implementation $set): self
    {
        $self = clone $this;
        $self->values = $this->values->diff(
            new Sequence\Defer(
                $this->type,
                (static function(\Iterator $values): \Generator {
                    /** @var T $value */
                    foreach ($values as $value) {
                        yield $value;
                    }
                })($set->iterator()),
            ),
        );

        return $self;
    }

    /**
     * @param Implementation<T> $set
     */
    public function equals(Implementation $set): bool
    {
        if ($this->size() !== $set->size()) {
            return false;
        }

        return $this->intersect($set)->size() === $this->size();
    }

    /**
     * @param callable(T): bool $predicate
     *
     * @return self<T>
     */
    public function filter(callable $predicate): self
    {
        $set = clone $this;
        $set->values = $this->values->filter($predicate);

        return $set;
    }

    /**
     * @param callable(T): void $function
     */
    public function foreach(callable $function): void
    {
        $this->values->foreach($function);
    }

    /**
     * @template D
     * @param callable(T): D $discriminator
     *
     * @throws CannotGroupEmptyStructure
     *
     * @return Map<D, Set<T>>
     */
    public function groupBy(callable $discriminator): Map
    {
        /** @var Map<D, Sequence<T>> */
        $map = $this->values->groupBy($discriminator);

        /**
         * @psalm-suppress MixedReturnTypeCoercion
         * @var Map<D, Set<T>>
         */
        return $map->reduce(
            Map::of($map->keyType(), Set::class),
            fn(Map $carry, $key, Sequence $values): Map => ($carry)(

                $key,
                $values->toSetOf($this->type),
            ),
        );
    }

    /**
     * @param callable(T): T $function
     *
     * @return self<T>
     */
    public function map(callable $function): self
    {
        $validate = $this->validate;

        /**
         * @psalm-suppress MissingClosureParamType
         * @psalm-suppress MissingClosureReturnType
         */
        $function = static function($value) use ($validate, $function) {
            /** @var T $value */
            $returned = $function($value);
            ($validate)($returned, 1);

            return $returned;
        };

        $self = clone $this;
        $self->values = $this
            ->values
            ->map($function)
            ->distinct();

        return $self;
    }

    /**
     * @param callable(T): bool $predicate
     *
     * @return Map<bool, Set<T>>
     */
    public function partition(callable $predicate): Map
    {
        $partitions = $this->values->partition($predicate);
        /** @var Set<T> */
        $truthy = $partitions
            ->get(true)
            ->toSetOf($this->type);
        /** @var Set<T> */
        $falsy = $partitions
            ->get(false)
            ->toSetOf($this->type);

        /**
         * @psalm-suppress InvalidScalarArgument
         * @psalm-suppress InvalidArgument
         * @var Map<bool, Set<T>>
         */
        return Map::of('bool', Set::class)
            (true, $truthy)
            (false, $falsy);
    }

    /**
     * @param callable(T, T): int $function
     *
     * @return Sequence<T>
     */
    public function sort(callable $function): Sequence
    {
        return $this
            ->values
            ->sort($function)
            ->toSequenceOf($this->type);
    }

    /**
     * @param Implementation<T> $set
     *
     * @return self<T>
     */
    public function merge(Implementation $set): self
    {
        $self = clone $this;
        $self->values = new Sequence\Defer(
            $this->type,
            (static function(\Iterator $self, \Iterator $set): \Generator {
                /** @var T $value */
                foreach ($self as $value) {
                    yield $value;
                }

                /** @var T $value */
                foreach ($set as $value) {
                    yield $value;
                }
            })($this->values->iterator(), $set->iterator()),
        );
        $self->values = $self->values->distinct();

        return $self;
    }

    /**
     * @template R
     * @param R $carry
     * @param callable(R, T): R $reducer
     *
     * @return R
     */
    public function reduce($carry, callable $reducer)
    {
        return $this->values->reduce($carry, $reducer);
    }

    /**
     * @return Implementation<T>
     */
    public function clear(): Implementation
    {
        return new Primitive($this->type);
    }

    public function empty(): bool
    {
        return $this->values->empty();
    }

    /**
     * @template ST
     *
     * @param null|callable(T): \Generator<ST> $mapper
     *
     * @return Sequence<ST>
     */
    public function toSequenceOf(string $type, callable $mapper = null): Sequence
    {
        return $this->values->toSequenceOf($type, $mapper);
    }

    /**
     * @template ST
     *
     * @param null|callable(T): \Generator<ST> $mapper
     *
     * @return Set<ST>
     */
    public function toSetOf(string $type, callable $mapper = null): Set
    {
        return $this->values->toSetOf($type, $mapper);
    }

    /**
     * @template MT
     * @template MS
     *
     * @param callable(T): \Generator<MT, MS> $mapper
     *
     * @return Map<MT, MS>
     */
    public function toMapOf(string $key, string $value, callable $mapper): Map
    {
        return $this->values->toMapOf($key, $value, $mapper);
    }
}


1		<?php
2		declare(strict_types = 1);
3
4		namespace Innmind\Immutable\Set;
5
6		use Innmind\Immutable\{
7		Map,
8		Sequence,
9		Set,
10		Type,
11		ValidateArgument,
12		Str,
13		Exception\CannotGroupEmptyStructure,
14		};
15
16		/**
17		* @template T
18		*/
19		final class Defer implements Implementation
20		{
21		private string $type;
22		private ValidateArgument $validate;
23		private Sequence\Implementation $values;
24
25		/**
26		* @param \Generator<T> $generator
27		*/
28	26	public function __construct(string $type, \Generator $generator)
29		{
30	26	$this->type = $type;
31	26	$this->validate = Type::of($type);
32	26	$this->values = (new Sequence\Defer($type, $generator))->distinct();
33	26	}
34
35	1	public function type(): string
36		{
37	1	return $this->type;
38		}
39
40	3	public function size(): int
41		{
42	3	return $this->values->size();
43		}
44
45		/**
46		* {@inheritdoc}
47		*/
48	1	public function count(): int
49		{
50	1	return $this->values->size();
51		}
52
53		/**
54		* @return \Iterator<T>
55		*/
56	14	public function iterator(): \Iterator
57		{
58	14	return $this->values->iterator();
59		}
60
61		/**
62		* @param Implementation<T> $set
63		*
64		* @return self<T>
65		*/
66	2	public function intersect(Implementation $set): self
67		{
68	2	if ($this === $set) {
69		// this is necessary as the manipulation of the same iterator below
70		// leads to unexpected behaviour
71	1	return $this;
72		}
73
74	2	$self = clone $this;
75	2	$self->values = $this->values->intersect(
76	2	new Sequence\Defer(
77	2	$this->type,
78		(static function(\Iterator $values): \Generator {
79		/** @var T $value */
80	2	foreach ($values as $value) {
81	2	yield $value;
82		}
83	2	})($set->iterator()),
84		),
85		);
86
87	2	return $self;
88		}
89
90		/**
91		* @param T $element
92		*
93		* @return self<T>
94		*/
95	1	public function __invoke($element): self
96		{
97	1	$set = clone $this;
98	1	$set->values = ($this->values)($element)->distinct();
99
100	1	return $set;
101		}
102
103		/**
104		* @param T $element
105		*/
106	2	public function contains($element): bool
107		{
108	2	return $this->values->contains($element);
109		}
110
111		/**
112		* @param T $element
113		*
114		* @return self<T>
115		*/
116	1	public function remove($element): self
117		{
118	1	if (!$this->contains($element)) {
119	1	return $this;
120		}
121
122	1	$index = $this->values->indexOf($element);
123	1	$set = clone $this;
124	1	$set->values = $this
125	1	->values
126	1	->slice(0, $index)
127	1	->append($this->values->slice($index + 1, $this->size()));
128
129	1	return $set;
130		}
131
132		/**
133		* @param Implementation<T> $set
134		*
135		* @return self<T>
136		*/
137	1	public function diff(Implementation $set): self
138		{
139	1	$self = clone $this;
140	1	$self->values = $this->values->diff(
141	1	new Sequence\Defer(
142	1	$this->type,
143		(static function(\Iterator $values): \Generator {
144		/** @var T $value */
145	1	foreach ($values as $value) {
146	1	yield $value;
147		}
148	1	})($set->iterator()),
149		),
150		);
151
152	1	return $self;
153		}
154
155		/**
156		* @param Implementation<T> $set
157		*/
158	1	public function equals(Implementation $set): bool
159		{
160	1	if ($this->size() !== $set->size()) {
161	1	return false;
162		}
163
164	1	return $this->intersect($set)->size() === $this->size();
165		}
166
167		/**
168		* @param callable(T): bool $predicate
169		*
170		* @return self<T>
171		*/
172	1	public function filter(callable $predicate): self
173		{
174	1	$set = clone $this;
175	1	$set->values = $this->values->filter($predicate);
176
177	1	return $set;
178		}
179
180		/**
181		* @param callable(T): void $function
182		*/
183	1	public function foreach(callable $function): void
184		{
185	1	$this->values->foreach($function);
186	1	}
187
188		/**
189		* @template D
190		* @param callable(T): D $discriminator
191		*
192		* @throws CannotGroupEmptyStructure
193		*
194		* @return Map<D, Set<T>>
195		*/
196	1	public function groupBy(callable $discriminator): Map
197		{
198		/** @var Map<D, Sequence<T>> */
199	1	$map = $this->values->groupBy($discriminator);
200
201		/**
202		* @psalm-suppress MixedReturnTypeCoercion
203		* @var Map<D, Set<T>>
204		*/
205	1	return $map->reduce(
206	1	Map::of($map->keyType(), Set::class),
207		fn(Map $carry, $key, Sequence $values): Map => ($carry)(
		0 ignored issues – show Bug introduced 2019-12-08 17:26 UTC by Report Bug Copy Issue Report A parse error occurred: Syntax error, unexpected ':', expecting T_DOUBLE_ARROW on line 207 at column 50 Loading history...
208	1	$key,
209	1	$values->toSetOf($this->type),
210	1	),
211		);
212	1	}
213
214		/**
215		* @param callable(T): T $function
216		*
217		* @return self<T>
218		*/
219		public function map(callable $function): self
220		{
221	2	$validate = $this->validate;
222
223		/**
224		* @psalm-suppress MissingClosureParamType
225		* @psalm-suppress MissingClosureReturnType
226		*/
227		$function = static function($value) use ($validate, $function) {
228		/** @var T $value */
229	2	$returned = $function($value);
230	2	($validate)($returned, 1);
231
232	1	return $returned;
233	2	};
234
235	2	$self = clone $this;
236	2	$self->values = $this
237	2	->values
238	2	->map($function)
239	2	->distinct();
240
241	2	return $self;
242		}
243
244		/**
245		* @param callable(T): bool $predicate
246		*
247		* @return Map<bool, Set<T>>
248		*/
249	1	public function partition(callable $predicate): Map
250		{
251	1	$partitions = $this->values->partition($predicate);
252		/** @var Set<T> */
253		$truthy = $partitions
254	1	->get(true)
255	1	->toSetOf($this->type);
256		/** @var Set<T> */
257		$falsy = $partitions
258	1	->get(false)
259	1	->toSetOf($this->type);
260
261		/**
262		* @psalm-suppress InvalidScalarArgument
263		* @psalm-suppress InvalidArgument
264		* @var Map<bool, Set<T>>
265	1	*/
266	1	return Map::of('bool', Set::class)
267	1	(true, $truthy)
268		(false, $falsy);
269		}
270
271		/**
272		* @param callable(T, T): int $function
273		*
274		* @return Sequence<T>
275	1	*/
276		public function sort(callable $function): Sequence
277		{
278	1	return $this
279	1	->values
280	1	->sort($function)
281		->toSequenceOf($this->type);
282		}
283
284		/**
285		* @param Implementation<T> $set
286		*
287		* @return self<T>
288	1	*/
289		public function merge(Implementation $set): self
290	1	{
291	1	$self = clone $this;
292	1	$self->values = new Sequence\Defer(
293		$this->type,
294		(static function(\Iterator $self, \Iterator $set): \Generator {
295	1	/** @var T $value */
296	1	foreach ($self as $value) {
297		yield $value;
298		}
299
300	1	/** @var T $value */
301	1	foreach ($set as $value) {
302		yield $value;
303	1	}
304		})($this->values->iterator(), $set->iterator()),
305	1	);
306		$self->values = $self->values->distinct();
307	1
308		return $self;
309		}
310
311		/**
312		* @template R
313		* @param R $carry
314		* @param callable(R, T): R $reducer
315		*
316		* @return R
317	4	*/
318		public function reduce($carry, callable $reducer)
319	4	{
320		return $this->values->reduce($carry, $reducer);
321		}
322
323		/**
324		* @return Implementation<T>
325	1	*/
326		public function clear(): Implementation
327	1	{
328		return new Primitive($this->type);
329		}
330	1
331		public function empty(): bool
332	1	{
333		return $this->values->empty();
334		}
335
336		/**
337		* @template ST
338		*
339		* @param null\|callable(T): \Generator<ST> $mapper
340		*
341		* @return Sequence<ST>
342	1	*/
343		public function toSequenceOf(string $type, callable $mapper = null): Sequence
344	1	{
345		return $this->values->toSequenceOf($type, $mapper);
346		}
347
348		/**
349		* @template ST
350		*
351		* @param null\|callable(T): \Generator<ST> $mapper
352		*
353		* @return Set<ST>
354	1	*/
355		public function toSetOf(string $type, callable $mapper = null): Set
356	1	{
357		return $this->values->toSetOf($type, $mapper);
358		}
359
360		/**
361		* @template MT
362		* @template MS
363		*
364		* @param callable(T): \Generator<MT, MS> $mapper
365		*
366		* @return Map<MT, MS>
367	1	*/
368		public function toMapOf(string $key, string $value, callable $mapper): Map
369	1	{
370		return $this->values->toMapOf($key, $value, $mapper);
371		}
372		}
373

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Defer::diff() A

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