Fix NumericString to array key

Author: VincentLanglet

src/Type/Accessory/AccessoryNumericStringType.php

@@ -218,7 +218,13 @@ public function toArray(): Type
 
 	public function toArrayKey(): Type
 	{
-		return new IntegerType();
+		return new UnionType([
+			new IntegerType(),
+			new IntersectionType([
+				new StringType(),
+				new AccessoryNumericStringType(),
+			]),
+		]);
 	}
 
 	public function isNull(): TrinaryLogic

src/Type/Constant/ConstantArrayType.php

@@ -601,11 +601,17 @@ public function findTypeAndMethodNames(): array
 
 	public function hasOffsetValueType(Type $offsetType): TrinaryLogic
 	{
-		$offsetType = $offsetType->toArrayKey();
+		$offsetArrayKeyType = $offsetType->toArrayKey();
+
+		return $this->recursiveHasOffsetValueType($offsetArrayKeyType);
+	}
+
+	private function recursiveHasOffsetValueType(Type $offsetType): TrinaryLogic
+	{
 		if ($offsetType instanceof UnionType) {
 			$results = [];
 			foreach ($offsetType->getTypes() as $innerType) {
-				$results[] = $this->hasOffsetValueType($innerType);
+				$results[] = $this->recursiveHasOffsetValueType($innerType);
 			}
 
 			return TrinaryLogic::extremeIdentity(...$results);
@@ -615,7 +621,7 @@ public function hasOffsetValueType(Type $offsetType): TrinaryLogic
 			if ($finiteTypes !== []) {
 				$results = [];
 				foreach ($finiteTypes as $innerType) {
-					$results[] = $this->hasOffsetValueType($innerType);
+					$results[] = $this->recursiveHasOffsetValueType($innerType);
 				}
 
 				return TrinaryLogic::extremeIdentity(...$results);

src/Type/IntersectionType.php

@@ -957,7 +957,10 @@ public function toArray(): Type
 	public function toArrayKey(): Type
 	{
 		if ($this->isNumericString()->yes()) {
-			return new IntegerType();
+			return new UnionType([
+				new IntegerType(),
+				$this,
+			]);
 		}
 
 		if ($this->isString()->yes()) {

tests/PHPStan/Analyser/nsrt/bug-3133.php

@@ -52,7 +52,7 @@ public function doLorem(
 	{
 		$a = [];
 		$a[$numericString] = 'foo';
-		assertType('non-empty-array<int, \'foo\'>', $a);
+		assertType('non-empty-array<int|numeric-string, \'foo\'>', $a);
 	}
 
 }

tests/PHPStan/Analyser/nsrt/isset-coalesce-empty-type.php

@@ -296,7 +296,7 @@ class Bug4671
 	 */
 	public function doFoo(int $intput, array $strings): void
 	{
-		assertType('false', isset($strings[(string) $intput]));
+		assertType('bool', isset($strings[(string) $intput]));
 	}
 
 }

tests/PHPStan/Rules/Methods/ReturnTypeRuleTest.php

@@ -1051,7 +1051,17 @@ public function testBug11337(): void
 
 	public function testBug10715(): void
 	{
-		$this->analyse([__DIR__ . '/data/bug-10715.php'], []);
+		$this->analyse([__DIR__.'/data/bug-10715.php'], []);
+	}
+
+	public function testBug4163(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-4163.php'], [
+			[
+				'Method Bug4163\HelloWorld::lall() should return array<string, string> but returns array<int|string, string>.',
+				28,
+			],
+		]);
 	}
 
 }

tests/PHPStan/Rules/Methods/data/bug-4163.php

@@ -0,0 +1,30 @@
+<?php declare(strict_types = 1);
+
+namespace Bug4163;
+
+class HelloWorld
+{
+	/**
+	 * @phpstan-var numeric
+	 */
+	public $lall = 0;
+
+	/**
+	 * @phpstan-return array<string, string>
+	 */
+	function lall() {
+		$helloCollection = [new HelloWorld(), new HelloWorld()];
+		$result = [];
+
+		foreach ($helloCollection as $hello) {
+			$key = (string)$hello->lall;
+
+			if (!isset($result[$key])) {
+				$lall = 'do_something_here';
+				$result[$key] = $lall;
+			}
+		}
+
+		return $result;
+	}
+}

tests/PHPStan/Rules/Variables/IssetRuleTest.php

@@ -233,10 +233,7 @@ public function testBug4671(): void
 	{
 		$this->treatPhpDocTypesAsCertain = true;
 		$this->strictUnnecessaryNullsafePropertyFetch = false;
-		$this->analyse([__DIR__ . '/data/bug-4671.php'], [[
-			'Offset numeric-string on array<string, string> in isset() does not exist.',
-			13,
-		]]);
+		$this->analyse([__DIR__ . '/data/bug-4671.php'], []);
 	}
 
 	public function testVariableCertaintyInIsset(): void