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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\IR\SymbolTable; |
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use Railt\SDL\Exception\TypeConflictException; |
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use Railt\SDL\IR\Type\TypeInterface; |
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/** |
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* Class Record |
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*/ |
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class VarSymbol implements VarSymbolInterface |
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{ |
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/** |
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* @var bool |
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*/ |
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protected $const = true; |
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/** |
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* @var string |
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*/ |
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private $name; |
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/** |
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* @var null|TypeInterface |
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*/ |
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private $type; |
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/** |
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* @var ValueInterface|null |
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*/ |
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private $value; |
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/** |
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* Record constructor. |
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* @param string $name |
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* @param TypeInterface|null $type |
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*/ |
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public function __construct(string $name, TypeInterface $type = null) |
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{ |
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$this->name = $name; |
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$this->type = $type; |
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} |
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/** |
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* @return null|ValueInterface |
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*/ |
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public function getValue(): ?ValueInterface |
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{ |
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return $this->value; |
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} |
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/** |
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* @param null|ValueInterface $value |
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* @return VarSymbolInterface |
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* @throws TypeConflictException |
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*/ |
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public function set(?ValueInterface $value): VarSymbolInterface |
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{ |
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$allowed = |
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// Not initialized variable or removing value |
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$value === null || |
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$this->type === null || |
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// Or same type |
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$value->getType()->typeOf($this->type); |
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if ($allowed) { |
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$this->value = $value; |
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return $this; |
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} |
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$error = 'Can not set a new value of type %s into %s $%s'; |
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throw new TypeConflictException(\sprintf($error, $value->getType(), $this->type, $this->getName())); |
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} |
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/** |
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* @return VarSymbolInterface |
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*/ |
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public function lock(): VarSymbolInterface |
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{ |
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$this->const = true; |
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return $this; |
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} |
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/** |
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* @return VarSymbolInterface |
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*/ |
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public function unlock(): VarSymbolInterface |
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{ |
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$this->const = false; |
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return $this; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isConstant(): bool |
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{ |
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return $this->const; |
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} |
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/** |
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* @return string |
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*/ |
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public function getName(): string |
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{ |
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return $this->name; |
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} |
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/** |
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* @return TypeInterface |
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*/ |
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public function getType(): ?TypeInterface |
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{ |
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return $this->type; |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString(): string |
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{ |
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return \sprintf('<%s:%s> = %s', $this->getName(), $this->getType() ?? '?', $this->value ?? 'Null'); |
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} |
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} |
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railt /
sdl
