vendor and env first commit

vendor/composer/pcre/src/PHPStan/PregMatchFlags.php

@@ -0,0 +1,37 @@
+<?php declare(strict_types=1);
+
+namespace Composer\Pcre\PHPStan;
+
+use PHPStan\Analyser\Scope;
+use PHPStan\Type\Constant\ConstantIntegerType;
+use PHPStan\Type\TypeCombinator;
+use PHPStan\Type\Type;
+use PhpParser\Node\Arg;
+use PHPStan\Type\Php\RegexArrayShapeMatcher;
+
+final class PregMatchFlags
+{
+    static public function getType(?Arg $flagsArg, Scope $scope): ?Type
+    {
+        if ($flagsArg === null) {
+            return new ConstantIntegerType(PREG_UNMATCHED_AS_NULL | RegexArrayShapeMatcher::PREG_UNMATCHED_AS_NULL_ON_72_73);
+        }
+
+        $flagsType = $scope->getType($flagsArg->value);
+
+        $constantScalars = $flagsType->getConstantScalarValues();
+        if ($constantScalars === []) {
+            return null;
+        }
+
+        $internalFlagsTypes = [];
+        foreach ($flagsType->getConstantScalarValues() as $constantScalarValue) {
+            if (!is_int($constantScalarValue)) {
+                return null;
+            }
+
+            $internalFlagsTypes[] = new ConstantIntegerType($constantScalarValue | PREG_UNMATCHED_AS_NULL | RegexArrayShapeMatcher::PREG_UNMATCHED_AS_NULL_ON_72_73);
+        }
+        return TypeCombinator::union(...$internalFlagsTypes);
+    }
+}