function LazyString::fromCallable

Parameters

callable|array $callback A callable or a [Closure, method] lazy-callable:

1 call to LazyString::fromCallable()

LazyString::fromStringable in vendor/symfony/string/LazyString.php

File

vendor/symfony/string/LazyString.php, line 26

Class

LazyString

A string whose value is computed lazily by a callback.

Namespace

Symfony\Component\String

Code

public static function fromCallable(callable|array $callback, mixed ...$arguments) : static {
    if (\is_array($callback) && !\is_callable($callback) && !(($callback[0] ?? null) instanceof \Closure || 2 < \count($callback))) {
        throw new \TypeError(\sprintf('Argument 1 passed to "%s()" must be a callable or a [Closure, method] lazy-callable, "%s" given.', __METHOD__, '[' . implode(', ', array_map('get_debug_type', $callback)) . ']'));
    }
    $lazyString = new static();
    $lazyString->value = static function () use (&$callback, &$arguments) : string {
        static $value;
        if (null !== $arguments) {
            if (!\is_callable($callback)) {
                $callback[0] = $callback[0]();
                $callback[1] ??= '__invoke';
            }
            $value = $callback(...$arguments);
            $callback = !\is_scalar($value) && !$value instanceof \Stringable ? self::getPrettyName($callback) : 'callable';
            $arguments = null;
        }
        return $value ?? '';
    };
    return $lazyString;
}