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<?php /** * SCSSPHP * * @copyright 2012-2020 Leaf Corcoran * * @license http://opensource.org/licenses/MIT MIT * * @link http://scssphp.github.io/scssphp */ namespace ScssPhp\ScssPhp\Evaluation; use ScssPhp\ScssPhp\Deprecation; use SourceSpan\FileSpan; /** * @internal */ abstract class EvaluationContext { private static ?EvaluationContext $evaluationContext = null; /** * The current evaluation context. * * @throws \LogicException if there isn't a Sass stylesheet currently being * evaluated. */ public static function getCurrent(): EvaluationContext { if (self::$evaluationContext !== null) { return self::$evaluationContext; } throw new \LogicException('No Sass stylesheet is currently being evaluated.'); } /** * Runs $callback with $context as {@see EvaluationContext::getCurrent()}. * * @template T * * @param callable(): T $callback * * @return T * * @param-immediately-invoked-callable $callback */ public static function withEvaluationContext(EvaluationContext $context, callable $callback) { $oldContext = self::$evaluationContext; self::$evaluationContext = $context; try { return $callback(); } finally { self::$evaluationContext = $oldContext; } } /** * Returns the span for the currently executing callable. * * For normal exception reporting, this should be avoided in favor of * throwing {@see SassScriptException}s. It should only be used when calling APIs * that require spans. * * @throws \LogicException if there isn't a callable being invoked. */ abstract public function getCurrentCallableSpan(): FileSpan; /** * Prints a warning message associated with the current `@import` or function * call. * * If $deprecation is non-null`, the warning is emitted as a deprecation * warning of that type. */ abstract public function warn(string $message, ?Deprecation $deprecation = null): void; }
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