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[TypeInfo] Fix handling ConstFetchNode #60820

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[TypeInfo] Fix handling ConstFetchNode #60820

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2 changes: 1 addition & 1 deletion src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpStanExtractorTest.php
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Original file line number Diff line number Diff line change
Expand Up @@ -927,7 +927,7 @@ public static function unionTypesProvider(): iterable
Type::object(ParentDummy::class),
Type::null(),
)];
yield ['f', null];
yield ['f', Type::union(Type::string(), Type::null())];
yield ['g', Type::array(Type::union(Type::string(), Type::int()))];
}

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33 changes: 33 additions & 0 deletions src/Symfony/Component/TypeInfo/Tests/Fixtures/DummyWithConstants.php
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@@ -0,0 +1,33 @@
<?php

/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace Symfony\Component\TypeInfo\Tests\Fixtures;

final class DummyWithConstants
{
public const DUMMY_STRING_A = 'a';
public const DUMMY_INT_A = 1;
public const DUMMY_FLOAT_A = 1.23;
public const DUMMY_TRUE_A = true;
public const DUMMY_FALSE_A = false;
public const DUMMY_NULL_A = null;
public const DUMMY_ARRAY_A = [];
public const DUMMY_ENUM_A = DummyEnum::ONE;

public const DUMMY_MIX_1 = self::DUMMY_STRING_A;
public const DUMMY_MIX_2 = self::DUMMY_INT_A;
public const DUMMY_MIX_3 = self::DUMMY_FLOAT_A;
public const DUMMY_MIX_4 = self::DUMMY_TRUE_A;
public const DUMMY_MIX_5 = self::DUMMY_FALSE_A;
public const DUMMY_MIX_6 = self::DUMMY_NULL_A;
public const DUMMY_MIX_7 = self::DUMMY_ARRAY_A;
public const DUMMY_MIX_8 = self::DUMMY_ENUM_A;
}
14 changes: 14 additions & 0 deletions src/Symfony/Component/TypeInfo/Tests/TypeResolver/StringTypeResolverTest.php
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Expand Up @@ -19,6 +19,7 @@
use Symfony\Component\TypeInfo\Tests\Fixtures\DummyBackedEnum;
use Symfony\Component\TypeInfo\Tests\Fixtures\DummyCollection;
use Symfony\Component\TypeInfo\Tests\Fixtures\DummyEnum;
use Symfony\Component\TypeInfo\Tests\Fixtures\DummyWithConstants;
use Symfony\Component\TypeInfo\Tests\Fixtures\DummyWithTemplates;
use Symfony\Component\TypeInfo\Type;
use Symfony\Component\TypeInfo\TypeContext\TypeContext;
Expand Down Expand Up @@ -90,6 +91,19 @@ public static function resolveDataProvider(): iterable
yield [Type::string(), '"string"'];
yield [Type::true(), 'true'];

// const fetch
yield [Type::string(), DummyWithConstants::class.'::DUMMY_STRING_*'];
yield [Type::string(), DummyWithConstants::class.'::DUMMY_STRING_A'];
yield [Type::int(), DummyWithConstants::class.'::DUMMY_INT_*'];
yield [Type::int(), DummyWithConstants::class.'::DUMMY_INT_A'];
yield [Type::float(), DummyWithConstants::class.'::DUMMY_FLOAT_*'];
yield [Type::bool(), DummyWithConstants::class.'::DUMMY_TRUE_*'];
yield [Type::bool(), DummyWithConstants::class.'::DUMMY_FALSE_*'];
yield [Type::null(), DummyWithConstants::class.'::DUMMY_NULL_*'];
yield [Type::array(), DummyWithConstants::class.'::DUMMY_ARRAY_*'];
yield [Type::enum(DummyEnum::class, Type\BuiltinType::string()), DummyWithConstants::class.'::DUMMY_ENUM_*'];
yield [Type::union(Type::string(), Type::int(), Type::float(), Type::bool(), Type::null(), Type::array(), Type::enum(DummyEnum::class, Type\BuiltinType::string())), DummyWithConstants::class.'::DUMMY_MIX_*'];

// identifiers
yield [Type::bool(), 'bool'];
yield [Type::bool(), 'boolean'];
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42 changes: 42 additions & 0 deletions src/Symfony/Component/TypeInfo/TypeResolver/StringTypeResolver.php
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Expand Up @@ -18,6 +18,7 @@
use PHPStan\PhpDocParser\Ast\ConstExpr\ConstExprNullNode;
use PHPStan\PhpDocParser\Ast\ConstExpr\ConstExprStringNode;
use PHPStan\PhpDocParser\Ast\ConstExpr\ConstExprTrueNode;
use PHPStan\PhpDocParser\Ast\ConstExpr\ConstFetchNode;
use PHPStan\PhpDocParser\Ast\Type\ArrayShapeNode;
use PHPStan\PhpDocParser\Ast\Type\ArrayTypeNode;
use PHPStan\PhpDocParser\Ast\Type\CallableTypeNode;
Expand Down Expand Up @@ -119,6 +120,47 @@ private function getTypeFromNode(TypeNode $node, ?TypeContext $typeContext): Typ
}

if ($node instanceof ConstTypeNode) {
if ($node->constExpr instanceof ConstFetchNode) {
$className = match (strtolower($node->constExpr->className)) {
'self' => $typeContext->getDeclaringClass(),
'static' => $typeContext->getCalledClass(),
'parent' => $typeContext->getParentClass(),
default => $node->constExpr->className,
};

if (!class_exists($className)) {
return Type::mixed();
}

$types = [];

foreach ((new \ReflectionClass($className))->getReflectionConstants() as $const) {
if (preg_match('/^'.str_replace('\*', '.*', preg_quote($node->constExpr->name, '/')).'$/', $const->getName())) {
$constValue = $const->getValue();

$types[] = match (true) {
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@mtarld mtarld Jun 19, 2025 •
edited
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Maybe you can use Type::fromValue() instead? And then merge types with CollectionType::mergeCollectionValueTypes() helper method?

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I wanted, but it's not available in 7.2

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Oh indeed, then it might be great to use that starting from 7.3 I guess.

true === $constValue,
false === $constValue => Type::bool(),
null === $constValue => Type::null(),
\is_string($constValue) => Type::string(),
\is_int($constValue) => Type::int(),
\is_float($constValue) => Type::float(),
\is_array($constValue) => Type::array(),
$constValue instanceof \UnitEnum => Type::enum($constValue::class),
default => Type::mixed(),
};
}
}

$types = array_unique($types);

if (\count($types) > 2) {
return Type::union(...$types);
}

return $types[0] ?? Type::null();
}

return match ($node->constExpr::class) {
ConstExprArrayNode::class => Type::array(),
ConstExprFalseNode::class => Type::false(),
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