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<?php |
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declare(strict_types=1); |
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namespace Baethon\Phln; |
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final class Phln |
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{ |
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const __ = '_phln_fn_partial_placeholder'; |
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protected static $macros = []; |
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private function __construct() |
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{ |
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} |
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/** |
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* Makes an alias for given macro |
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* |
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* @param string $macroName |
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* @param string $targetMacro |
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*/ |
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public static function alias(string $macroName, string $targetMacro) |
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{ |
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static::macro($macroName, static::raw($targetMacro)); |
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} |
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/** |
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* Returns "reference" to one of Phln macros or methods |
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* |
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* @param string $macroName |
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* @return callable |
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*/ |
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public static function raw(string $macroName): callable |
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{ |
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return static::hasMacro($macroName) |
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? static::$macros[$macroName] |
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: sprintf('%s::%s', static::class, $macroName); |
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} |
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public static function arity(callable $fn): int |
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{ |
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return ($fn instanceof FixedArityInterface) |
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? $fn->getArity() |
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: (new \ReflectionFunction($fn))->getNumberOfParameters(); |
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} |
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public static function curry(callable $fn, array $args = []) |
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{ |
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return CurriedFn::of($fn)(...$args); |
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} |
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public static function curryN(int $n, callable $fn, array $args = []) |
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{ |
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return CurriedFn::ofN($n, $fn)(...$args); |
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} |
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public static function macro(string $name, callable $macro) |
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{ |
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static::$macros[$name] = $macro; |
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} |
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public static function hasMacro(string $name): bool |
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{ |
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return isset(static::$macros[$name]); |
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} |
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public static function __callStatic($method, $parameters) |
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{ |
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if (! static::hasMacro($method)) { |
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throw new \BadMethodCallException("Method {$method} does not exist."); |
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} |
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return static::curry(static::$macros[$method], $parameters); |
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} |
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} |
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baethon /
phln
