SimpleType.php

<?php

declare (strict_types=1);

/*
 * This file is part of sebastian/type.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace SebastianBergmann\Type;

use function strtolower;
final class SimpleType extends Type {
    private string $name;
    private bool $allowsNull;
    private mixed $value;
    public function __construct(string $name, bool $nullable, mixed $value = null) {
        $this->name = $this->normalize($name);
        $this->allowsNull = $nullable;
        $this->value = $value;
    }
    public function isAssignable(Type $other) : bool {
        if ($this->allowsNull && $other instanceof NullType) {
            return true;
        }
        if ($this->name === 'bool' && $other->name() === 'true') {
            return true;
        }
        if ($this->name === 'bool' && $other->name() === 'false') {
            return true;
        }
        if ($other instanceof self) {
            return $this->name === $other->name;
        }
        return false;
    }
    public function name() : string {
        return $this->name;
    }
    public function allowsNull() : bool {
        return $this->allowsNull;
    }
    public function value() : mixed {
        return $this->value;
    }
    
    /**
     * @psalm-assert-if-true SimpleType $this
     */
    public function isSimple() : bool {
        return true;
    }
    private function normalize(string $name) : string {
        $name = strtolower($name);
        return match ($name) {    'boolean' => 'bool',
            'real', 'double' => 'float',
            'integer' => 'int',
            '[]' => 'array',
            default => $name,
        
        };
    }

}