Revert support array-shapes in array_merge

This reverts commit f21b218.

Author: ondrejmirtes

src/Type/Php/ArrayMergeFunctionDynamicReturnTypeExtension.php

@@ -8,11 +8,11 @@
 use PHPStan\Reflection\ParametersAcceptorSelector;
 use PHPStan\Type\Accessory\NonEmptyArrayType;
 use PHPStan\Type\ArrayType;
-use PHPStan\Type\Constant\ConstantArrayTypeBuilder;
 use PHPStan\Type\GeneralizePrecision;
 use PHPStan\Type\Type;
 use PHPStan\Type\TypeCombinator;
 use PHPStan\Type\TypeUtils;
+use PHPStan\Type\UnionType;
 
 class ArrayMergeFunctionDynamicReturnTypeExtension implements \PHPStan\Type\DynamicFunctionReturnTypeExtension
 {
@@ -30,63 +30,32 @@ public function getTypeFromFunctionCall(FunctionReflection $functionReflection,
 
 		$keyTypes = [];
 		$valueTypes = [];
-		$returnedArrayBuilder = ConstantArrayTypeBuilder::createEmpty();
-		$returnedArrayBuilderFilled = false;
 		$nonEmpty = false;
-		$offsetCount = 0;
 		foreach ($functionCall->args as $arg) {
 			$argType = $scope->getType($arg->value);
-
 			if ($arg->unpack) {
 				$argType = $argType->getIterableValueType();
-			}
-
-			$arrays = TypeUtils::getConstantArrays($argType);
-			if (count($arrays) > 0) {
-				foreach ($arrays as $constantArray) {
-					foreach ($constantArray->getKeyTypes() as $i => $keyType) {
-						$returnedArrayBuilderFilled = true;
-						$offsetCount++;
-						if ($offsetCount > ConstantArrayTypeBuilder::ARRAY_COUNT_LIMIT) {
-							$returnedArrayBuilder->degradeToGeneralArray();
-						}
-
-						$returnedArrayBuilder->setOffsetValueType(
-							is_numeric($keyType->getValue()) ? null : $keyType,
-							$constantArray->getValueTypes()[$i]
-						);
+				if ($argType instanceof UnionType) {
+					foreach ($argType->getTypes() as $innerType) {
+						$argType = $innerType;
 					}
 				}
-
-			} else {
-				$keyTypes[] = TypeUtils::generalizeType($argType->getIterableKeyType(), GeneralizePrecision::moreSpecific());
-				$valueTypes[] = $argType->getIterableValueType();
 			}
 
+			$keyTypes[] = TypeUtils::generalizeType($argType->getIterableKeyType(), GeneralizePrecision::moreSpecific());
+			$valueTypes[] = $argType->getIterableValueType();
+
 			if (!$argType->isIterableAtLeastOnce()->yes()) {
 				continue;
 			}
 
 			$nonEmpty = true;
 		}
 
-		if (count($keyTypes) > 0) {
-			$arrayType = new ArrayType(
-				TypeCombinator::union(...$keyTypes),
-				TypeCombinator::union(...$valueTypes)
-			);
-
-			if ($returnedArrayBuilderFilled) {
-				$arrayType = TypeCombinator::union($returnedArrayBuilder->getArray(), $arrayType);
-			}
-		} elseif ($returnedArrayBuilderFilled) {
-			$arrayType = $returnedArrayBuilder->getArray();
-		} else {
-			$arrayType = new ArrayType(
-				TypeCombinator::union(...$keyTypes),
-				TypeCombinator::union(...$valueTypes)
-			);
-		}
+		$arrayType = new ArrayType(
+			TypeCombinator::union(...$keyTypes),
+			TypeCombinator::union(...$valueTypes)
+		);
 
 		if ($nonEmpty) {
 			$arrayType = TypeCombinator::intersect($arrayType, new NonEmptyArrayType());

tests/PHPStan/Analyser/LegacyNodeScopeResolverTest.php

@@ -5153,44 +5153,31 @@ public function dataArrayFunctions(): array
 				'array_values($generalStringKeys)',
 			],
 			[
-				"array('foo' => stdClass, 0 => stdClass)",
+				'array<int|non-empty-string, stdClass>&nonEmpty',
 				'array_merge($stringOrIntegerKeys)',
 			],
 			[
 				'array<int|string, DateTimeImmutable|int>',
 				'array_merge($generalStringKeys, $generalDateTimeValues)',
 			],
 			[
-				'array<0|string, int|stdClass>&nonEmpty',
+				'array<int|string, int|stdClass>&nonEmpty',
 				'array_merge($generalStringKeys, $stringOrIntegerKeys)',
 			],
 			[
-				'array<0|string, int|stdClass>&nonEmpty',
+				'array<int|string, int|stdClass>&nonEmpty',
 				'array_merge($stringOrIntegerKeys, $generalStringKeys)',
 			],
 			[
-				"array('foo' => stdClass, 'bar' => stdClass, 0 => stdClass)",
+				'array<int|non-empty-string, \'foo\'|stdClass>&nonEmpty',
 				'array_merge($stringKeys, $stringOrIntegerKeys)',
 			],
 			[
-				"array('foo' => 1, 'bar' => 2, 0 => 2, 1 => 3)",
-				"array_merge(['foo' => 4, 'bar' => 5], ...[['foo' => 1, 'bar' => 2], [2, 3]])",
-			],
-			[
-				"array('foo' => 1, 'foo2' => stdClass)",
-				'array_merge([\'foo\' => new stdClass()], ...[[\'foo2\' => new stdClass()], [\'foo\' => 1]])',
-			],
-
-			[
-				"array('foo' => 1, 'foo2' => stdClass)",
-				'array_merge([\'foo\' => new stdClass()], ...[[\'foo2\' => new stdClass()], [\'foo\' => 1]])',
-			],
-			[
-				"array('foo' => 'foo', 0 => stdClass, 'bar' => stdClass)",
+				'array<int|non-empty-string, \'foo\'|stdClass>&nonEmpty',
 				'array_merge($stringOrIntegerKeys, $stringKeys)',
 			],
 			[
-				"array('color' => 'green', 0 => 2, 1 => 4, 2 => 'a', 3 => 'b', 'shape' => 'trapezoid', 4 => 4)",
+				'array<int|non-empty-string, 2|4|\'a\'|\'b\'|\'green\'|\'red\'|\'trapezoid\'>&nonEmpty',
 				'array_merge(array("color" => "red", 2, 4), array("a", "b", "color" => "green", "shape" => "trapezoid", 4))',
 			],
 			[

tests/PHPStan/Analyser/NodeScopeResolverTest.php

@@ -134,8 +134,6 @@ public function dataFileAsserts(): iterable
 			yield from $this->gatherAssertTypes(__DIR__ . '/data/throw-expr.php');
 		}
 
-		yield from $this->gatherAssertTypes(__DIR__ . '/data/array-merge.php');
-
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/non-empty-array.php');
 
 		if (PHP_VERSION_ID >= 80000 || self::$useStaticReflectionProvider) {