Import global functions and drop assert() calls

phpcs.xml.dist

@@ -222,7 +222,7 @@
     <rule ref="SlevomatCodingStandard.Namespaces.ReferenceUsedNamesOnly">
         <properties>
             <property name="searchAnnotations" value="true"/>
-            <property name="allowFallbackGlobalFunctions" value="true"/>
+            <property name="allowFallbackGlobalFunctions" value="false"/>
             <property name="allowFallbackGlobalConstants" value="true"/>
             <property name="allowFullyQualifiedNameForCollidingClasses" value="true"/>
         </properties>

src/CollectionLogic.php

@@ -39,6 +39,12 @@
 use Noctud\Collection\Store\ReadOnlyElementStore;
 use Traversable;
 use NoDiscard;
+use function sort;
+use function rsort;
+use function array_values;
+use function usort;
+use function array_reverse;
+use function shuffle;
 
 /**
  * @phpstan-type PhpStormBugBypass array{0:NK,1:NV}

src/Exception/InvalidSequenceSourceException.php

@@ -9,6 +9,9 @@
 
 namespace Noctud\Collection\Exception;
 
+use function sprintf;
+use function get_debug_type;
+
 /**
  * Thrown when a sequence source closure returns a non-iterable value.
  */

src/Exception/NoSuchElementException.php

@@ -12,6 +12,7 @@
 use LogicException;
 use Noctud\Collection\Collection;
 use Noctud\Collection\Sequence\Sequence;
+use function sprintf;
 
 final class NoSuchElementException extends LogicException implements NoctudCollectionException
 {

src/Exception/UnsupportedOperationException.php

@@ -12,6 +12,8 @@
 use LogicException;
 use Noctud\Collection\Collection;
 use Noctud\Collection\Sequence\Sequence;
+use function sprintf;
+use function lcfirst;
 
 /**
  * Thrown when a mutating method is called on an immutable collection/map or when a

src/IterableTerminalsLogic.php

@@ -14,6 +14,9 @@
 use Noctud\Collection\Exception\NoSuchElementException;
 use Noctud\Collection\Exception\UnsupportedOperationException;
 use Stringable;
+use function is_scalar;
+use function sprintf;
+use function get_debug_type;
 
 /**
  * Terminal operations implemented by walking the elements and nothing else, shared by the eager

src/KeyHasher.php

@@ -10,6 +10,20 @@
 namespace Noctud\Collection;
 
 use Noctud\Collection\Exception\InvalidKeyTypeException;
+use function is_int;
+use function is_string;
+use function is_null;
+use function is_bool;
+use function is_float;
+use function sprintf;
+use function is_object;
+use function spl_object_id;
+use function is_array;
+use function hash;
+use function serialize;
+use function is_resource;
+use function get_resource_id;
+use function get_debug_type;
 
 /**
  * @internal

src/List/ArrayList/ArrayIndexStore.php

@@ -14,6 +14,17 @@
 use Noctud\Collection\Store\AbstractElementStore;
 use Noctud\Collection\Store\ReadWriteIndexedStore;
 use Traversable;
+use function is_array;
+use function array_is_list;
+use function array_values;
+use function array_push;
+use function array_unshift;
+use function array_key_exists;
+use function array_search;
+use function count;
+use function array_splice;
+use function array_keys;
+use function in_array;
 
 /**
  * Internal storage for ArrayList.

src/List/ListLogic.php

@@ -27,6 +27,11 @@
 use NoDiscard;
 use function Noctud\Collection\intMapOf;
 use function Noctud\Collection\listOf;
+use function count;
+use function max;
+use function array_slice;
+use function is_int;
+use function shuffle;
 
 /**
  * Shared logic for all List implementations.

src/Map/HashMap/HashKeyValueStore.php

@@ -17,6 +17,24 @@
 use Noctud\Collection\Operation\SortOperation;
 use Noctud\Collection\Store\KeyValueStore;
 use Traversable;
+use function count;
+use function array_key_exists;
+use function in_array;
+use function array_key_first;
+use function array_key_last;
+use function array_rand;
+use function usort;
+use function array_replace;
+use function array_slice;
+use function array_reverse;
+use function array_keys;
+use function shuffle;
+use function array_values;
+use function is_scalar;
+use function is_float;
+use function sprintf;
+use function is_bool;
+use function get_debug_type;
 
 /**
  * Internal dual-array entry storage for maps with normalized keys.

src/Map/IntMap/ImmutableIntMap.php

@@ -23,6 +23,7 @@
 use function Noctud\Collection\intMapOf;
 use function Noctud\Collection\mapOf;
 use function Noctud\Collection\mutableIntMapOf;
+use function iterator_to_array;
 
 /**
  * Immutable int-key map with optimized single-array storage.

src/Map/IntMap/IntKeyValueStore.php

@@ -17,6 +17,25 @@
 use Noctud\Collection\Operation\SortOperation;
 use Noctud\Collection\Store\KeyValueStore;
 use Traversable;
+use function is_array;
+use function array_is_list;
+use function array_all;
+use function is_int;
+use function sprintf;
+use function get_debug_type;
+use function count;
+use function array_key_exists;
+use function in_array;
+use function array_key_first;
+use function array_key_last;
+use function array_rand;
+use function usort;
+use function array_replace;
+use function array_slice;
+use function array_reverse;
+use function array_keys;
+use function shuffle;
+use function array_values;
 
 /**
  * Internal single-array entry storage for int-key maps.
@@ -146,8 +165,10 @@ public function first(bool $throw = false): ?SimpleMapEntry
 			throw new NoSuchElementException();
 		}
 
+		// Non-empty (checked above), so the key is never null.
+		/** @var int $key */
 		$key = array_key_first($this->data);
-		assert($key !== null);
+
 		return new SimpleMapEntry($key, $this->data[$key]);
 	}
 
@@ -165,8 +186,10 @@ public function last(bool $throw = false): ?SimpleMapEntry
 			throw new NoSuchElementException();
 		}
 
+		// Non-empty (checked above), so the key is never null.
+		/** @var int $key */
 		$key = array_key_last($this->data);
-		assert($key !== null);
+
 		return new SimpleMapEntry($key, $this->data[$key]);
 	}
 

src/Map/MapLogic.php

@@ -27,6 +27,9 @@
 use function Noctud\Collection\listOf;
 use function Noctud\Collection\mapOf;
 use function Noctud\Collection\mutableMapOf;
+use function max;
+use function count;
+use function array_slice;
 
 /**
  * Shared logic for all Map implementations.

src/Map/StringMap/ImmutableStringMap.php

@@ -23,6 +23,7 @@
 use function Noctud\Collection\mapOf;
 use function Noctud\Collection\mutableStringMapOf;
 use function Noctud\Collection\stringMapOf;
+use function iterator_to_array;
 
 /**
  * Immutable string-key map with optimized single-array storage.

src/Map/StringMap/StringKeyValueStore.php

@@ -16,6 +16,25 @@
 use Noctud\Collection\Operation\SortOperation;
 use Noctud\Collection\Store\KeyValueStore;
 use Traversable;
+use function is_array;
+use function count;
+use function is_string;
+use function array_key_exists;
+use function in_array;
+use function array_key_first;
+use function array_key_last;
+use function array_rand;
+use function sprintf;
+use function get_debug_type;
+use function usort;
+use function array_replace;
+use function array_slice;
+use function array_reverse;
+use function array_keys;
+use function shuffle;
+use function array_map;
+use function strval;
+use function array_values;
 
 /**
  * Internal single-array entry storage for string-key maps.

src/Map/View/MapEntryStore.php

@@ -14,6 +14,7 @@
 use Noctud\Collection\Store\ReadOnlyElementStore;
 use Noctud\Collection\Store\KeyValueStore;
 use Traversable;
+use function iterator_to_array;
 
 /**
  * @template K of string|int|bool|float|object

src/Operation/ChunkOperation.php

@@ -10,6 +10,9 @@
 namespace Noctud\Collection\Operation;
 
 use Generator;
+use function is_array;
+use function array_chunk;
+use function count;
 
 /**
  * @internal

src/Operation/DistinctOperation.php

@@ -11,6 +11,7 @@
 
 use Generator;
 use Noctud\Collection\KeyHasher;
+use function array_key_exists;
 
 /**
  * @internal

src/Operation/DropOperation.php

@@ -10,6 +10,12 @@
 namespace Noctud\Collection\Operation;
 
 use Generator;
+use function is_array;
+use function array_slice;
+use function max;
+use function array_values;
+use function iterator_to_array;
+use function count;
 
 /**
  * @internal

src/Operation/FlattenOperation.php

@@ -10,6 +10,7 @@
 namespace Noctud\Collection\Operation;
 
 use Generator;
+use function is_iterable;
 
 /**
  * @internal

src/Operation/FlipKeyValueOperation.php

@@ -13,6 +13,9 @@
 use Noctud\Collection\KeyHasher;
 use Noctud\Collection\Map\HashMap\HashKeyValueStore;
 use Noctud\Collection\Map\KeyCollisionStrategy;
+use function sprintf;
+use function is_scalar;
+use function get_debug_type;
 
 /**
  * @internal

src/Operation/SetOperation.php

@@ -13,6 +13,9 @@
 use Noctud\Collection\Set\HashSet\HashElementStore;
 use Noctud\Collection\Set\HashSet\ImmutableHashSet;
 use Noctud\Collection\Set\HashSet\MutableHashSet;
+use function array_intersect_key;
+use function array_diff_key;
+use function array_key_exists;
 
 /**
  * Set algebra on arrays keyed by KeyHasher::hashSetKey(): PHP intersects, subtracts and merges

src/Operation/SortOperation.php

@@ -9,6 +9,8 @@
 
 namespace Noctud\Collection\Operation;
 
+use function uasort;
+
 /**
  * @internal
  */

src/Operation/TakeOperation.php

@@ -10,6 +10,11 @@
 namespace Noctud\Collection\Operation;
 
 use Generator;
+use function is_array;
+use function array_slice;
+use function array_values;
+use function iterator_to_array;
+use function count;
 
 /**
  * @internal

src/Operation/UnzipOperation.php

@@ -10,6 +10,8 @@
 namespace Noctud\Collection\Operation;
 
 use Noctud\Collection\Exception\UnsupportedOperationException;
+use function is_array;
+use function array_key_exists;
 
 /**
  * @internal

src/Operation/WindowOperation.php

@@ -10,6 +10,10 @@
 namespace Noctud\Collection\Operation;
 
 use Generator;
+use function is_array;
+use function count;
+use function min;
+use function array_slice;
 
 /**
  * @internal

src/Operation/ZipOperation.php

@@ -16,6 +16,7 @@
 use Noctud\Collection\Exception\NonReplayableSourceException;
 use NoRewindIterator;
 use Throwable;
+use function is_array;
 
 /**
  * @internal

src/Sequence/SequenceLogic.php

@@ -41,6 +41,12 @@
 use function Noctud\Collection\listOf;
 use function Noctud\Collection\mapOf;
 use function Noctud\Collection\setOf;
+use function count;
+use function in_array;
+use function array_keys;
+use function iterator_to_array;
+use function is_array;
+use function is_iterable;
 
 /**
  * @template E

src/Set/HashSet/HashElementStore.php

@@ -14,6 +14,14 @@
 use Noctud\Collection\Store\AbstractElementStore;
 use Noctud\Collection\Store\ReadWriteElementStore;
 use Traversable;
+use function array_key_exists;
+use function array_key_first;
+use function uasort;
+use function asort;
+use function array_reverse;
+use function array_keys;
+use function shuffle;
+use function array_values;
 
 /**
  * Internal storage for HashSet.

src/Set/SetLogic.php

@@ -26,6 +26,12 @@
 use NoDiscard;
 use function Noctud\Collection\mutableSetOf;
 use function Noctud\Collection\setOf;
+use function sort;
+use function rsort;
+use function array_values;
+use function usort;
+use function array_reverse;
+use function shuffle;
 
 /**
  * Shared logic for all Set implementations.