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<?php |
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/** |
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* This file is part of Railt package. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Railt\SDL\Compiler\System; |
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use Railt\Parser\Ast\RuleInterface; |
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use Railt\Reflection\Contracts\Definition; |
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use Railt\Reflection\Contracts\Definition\Behaviour\ProvidesTypeIndication; |
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use Railt\Reflection\Contracts\Definition\Dependent\ArgumentDefinition; |
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use Railt\Reflection\Contracts\Definition\Dependent\FieldDefinition; |
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use Railt\Reflection\Contracts\Definition\Dependent\InputFieldDefinition; |
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use Railt\Reflection\Contracts\Definition\TypeDefinition; |
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use Railt\Reflection\Definition\Behaviour\HasTypeIndication; |
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use Railt\SDL\Ast\ProvidesTypeHint; |
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use Railt\SDL\Exception\TypeConflictException; |
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/** |
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* Class TypeHintSystem |
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*/ |
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class TypeHintSystem extends System |
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{ |
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/** |
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* @var int |
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*/ |
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private const IS_RENDERABLE = 0x01; |
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/** |
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* @var int |
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*/ |
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private const IS_INPUTABLE = 0x02; |
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/** |
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* @var int[] |
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*/ |
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private const TYPE_BEHAVIOURS = [ |
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FieldDefinition::class => self::IS_RENDERABLE, |
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ArgumentDefinition::class => self::IS_INPUTABLE, |
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InputFieldDefinition::class => self::IS_INPUTABLE, |
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]; |
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/** |
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* @param Definition|HasTypeIndication|TypeDefinition $definition |
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* @param RuleInterface $ast |
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*/ |
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public function resolve(Definition $definition, RuleInterface $ast): void |
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{ |
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if ($definition instanceof ProvidesTypeIndication && $ast instanceof ProvidesTypeHint) { |
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$hint = $ast->getTypeHintNode(); |
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$definition->withModifiers($hint->getModifiers()); |
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$this->linker(function () use ($hint, $definition) { |
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/** @var TypeDefinition $resolved */ |
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$resolved = $this->get($hint->getFullName(), $definition); |
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$this->verify($definition, $resolved); |
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}); |
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} |
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} |
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/** |
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* @param TypeDefinition $context |
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* @param TypeDefinition $hint |
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* @throws \Railt\SDL\Exception\CompilerException |
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*/ |
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private function verify(TypeDefinition $context, TypeDefinition $hint): void |
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{ |
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foreach (self::TYPE_BEHAVIOURS as $type => $behaviour) { |
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if ($context instanceof $type) { |
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$error = null; |
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switch ($behaviour) { |
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case self::IS_RENDERABLE && ! $hint->isRenderable(): |
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$error = '%s "%s" can contain only renderable type (unions, objects, etc), but %s given'; |
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break; |
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case self::IS_INPUTABLE && ! $hint->isInputable(): |
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$error = '%s "%s" can contain only inputable type (inputs, scalars, etc), but %s given'; |
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break; |
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} |
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if ($error) { |
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$error = \sprintf($error, $context::getType(), $context->getName(), $hint); |
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throw (new TypeConflictException($error))->in($context); |
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} |
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} |
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} |
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} |
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} |
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railt /
sdl
In PHP, under loose comparison (like
==, or!=, orswitchconditions), values of different types might be equal.For
stringvalues, the empty string''is a special case, in particular the following results might be unexpected: