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Copy pathGenericTypeVariableResolver.php
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47 lines (37 loc) · 1.12 KB
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<?php declare(strict_types = 1);
namespace PHPStan\Type;
use PHPStan\Type\Generic\TemplateTypeHelper;
/** @api */
class GenericTypeVariableResolver
{
public static function getType(
TypeWithClassName $type,
string $genericClassName,
string $typeVariableName,
): ?Type
{
$classReflection = $type->getClassReflection();
if ($classReflection === null) {
return null;
}
$ancestorClassReflection = $classReflection->getAncestorWithClassName($genericClassName);
if ($ancestorClassReflection === null) {
return null;
}
$activeTemplateTypeMap = $ancestorClassReflection->getPossiblyIncompleteActiveTemplateTypeMap();
$type = $activeTemplateTypeMap->getType($typeVariableName);
if ($type instanceof ErrorType) {
$templateTypeMap = $ancestorClassReflection->getTemplateTypeMap();
$templateType = $templateTypeMap->getType($typeVariableName);
if ($templateType === null) {
return $type;
}
$bound = TemplateTypeHelper::resolveToBounds($templateType);
if ($bound instanceof MixedType && $bound->isExplicitMixed()) {
return new MixedType(false);
}
return $bound;
}
return $type;
}
}