added Type::fromValue()

Author: dg

src/Utils/Type.php

@@ -10,7 +10,7 @@
 namespace Nette\Utils;
 
 use Nette;
-use function array_map, array_search, array_splice, count, explode, implode, is_a, is_string, strcasecmp, strtolower, substr, trim;
+use function array_map, array_search, array_splice, count, explode, implode, is_a, is_resource, is_string, strcasecmp, strtolower, substr, trim;
 use const PHP_VERSION_ID;
 
 
@@ -86,6 +86,23 @@ public static function fromString(string $type): self
 	}
 
 
+	/**
+	 * Creates a Type object based on the actual type of value.
+	 */
+	public static function fromValue(mixed $value): self
+	{
+		$type = get_debug_type($value);
+		if (is_resource($value)) {
+			$type = 'mixed';
+		} elseif (str_ends_with($type, '@anonymous')) {
+			$parent = substr($type, 0, -10);
+			$type = $parent === 'class' ? 'object' : $parent;
+		}
+
+		return new self([$type]);
+	}
+
+
 	/**
 	 * Resolves 'self', 'static' and 'parent' to the actual class name.
 	 */

tests/Utils/Type.fromValue.phpt

@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * Test: Nette\Utils\Type::fromValue()
+ */
+
+declare(strict_types=1);
+
+use Nette\Utils\Type;
+use Tester\Assert;
+
+require __DIR__ . '/../bootstrap.php';
+
+
+class Foo
+{
+}
+
+interface Baz
+{
+}
+
+Assert::same('int', (string) Type::fromValue(42));
+Assert::same('float', (string) Type::fromValue(3.14));
+Assert::same('string', (string) Type::fromValue('hello'));
+Assert::same('bool', (string) Type::fromValue(true));
+Assert::same('bool', (string) Type::fromValue(false));
+Assert::same('null', (string) Type::fromValue(null));
+Assert::same('array', (string) Type::fromValue([1, 2, 3]));
+Assert::same('Foo', (string) Type::fromValue(new Foo));
+Assert::same('stdClass', (string) Type::fromValue(new stdClass));
+Assert::same('Closure', (string) Type::fromValue(fn() => null));
+
+// Anonymous class
+Assert::same('object', (string) Type::fromValue(new class {
+}));
+
+Assert::same('Foo', (string) Type::fromValue(new class extends Foo {
+}));
+
+Assert::same('Baz', (string) Type::fromValue(new class implements Baz {
+}));
+
+// Resource
+Assert::same('mixed', (string) Type::fromValue(fopen('php://memory', 'r')));