Rename isLiteralArray to isArrayExpression for clarity

The flag marks builders processing Expr\Array_ nodes (PHP array
expression syntax), which have different auto-index semantics for
negative keys in PHP 8.0-8.2 vs imperative assignment. The term
"array expression" better matches the PHP parser terminology.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: phpstan-bot

src/Php/PhpVersion.php

@@ -516,7 +516,7 @@ public function updatesAutoIncrementKeyForNegativeValues(): bool
 		return $this->versionId >= 80300;
 	}
 
-	public function updatesAutoIncrementKeyForNegativeValuesInArrayLiteral(): bool
+	public function updatesAutoIncrementKeyForNegativeValuesInArrayExpression(): bool
 	{
 		return $this->versionId >= 80000;
 	}

src/Reflection/InitializerExprTypeResolver.php

@@ -639,7 +639,7 @@ public function getArrayType(Expr\Array_ $expr, callable $getTypeCallback): Type
 		}
 
 		$arrayBuilder = ConstantArrayTypeBuilder::createEmpty();
-		$arrayBuilder->setLiteralArray();
+		$arrayBuilder->setArrayExpression();
 		$isList = null;
 		$hasOffsetValueTypes = [];
 		foreach ($expr->items as $arrayItem) {

src/Type/Constant/ConstantArrayTypeBuilder.php

@@ -42,7 +42,7 @@ final class ConstantArrayTypeBuilder
 
 	private bool $oversized = false;
 
-	private bool $isLiteralArray = false;
+	private bool $isArrayExpression = false;
 
 	/**
 	 * @param list<Type> $keyTypes
@@ -65,9 +65,9 @@ public static function createEmpty(): self
 		return new self([], [], [0], [], TrinaryLogic::createYes());
 	}
 
-	public function setLiteralArray(): void
+	public function setArrayExpression(): void
 	{
-		$this->isLiteralArray = true;
+		$this->isArrayExpression = true;
 	}
 
 	public static function createFromConstantArray(ConstantArrayType $startArrayType): self
@@ -443,7 +443,7 @@ private function shouldUpdateAutoIndex(int $offsetValue, int $max): bool
 			return true;
 		}
 
-		return $this->isLiteralArray && $phpVersion->updatesAutoIncrementKeyForNegativeValuesInArrayLiteral();
+		return $this->isArrayExpression && $phpVersion->updatesAutoIncrementKeyForNegativeValuesInArrayExpression();
 	}
 
 }