<?php
namespace Encase\Functional;
/**
* Invoke the `$func` function on `$subject` with the given arguments.
*
* Calls `$func($subject, ...$args)`, but will also clone $subject if it is an
* object, so as to prevent $func from being able to mutate it. Returns the
* result of the function call.
*
* Note that the argument list passed is limited to the number of REQUIRED
* function parameters, so as to allow PHP internal functions to be used with
* greater flexibility and ease. This can be overridden by wrapping the `$func`
* argument in an `\Encase\Functional\Func`, in which case all arguments will
* be passed.
*
* @param mixed $subject The subject of the function invokation.
* @param callable $func The function to apply.
* @param mixed ...$args One or more arguments to pass to the function.
* @return mixed The result of the function call.
*/
function apply($subject, $func, ...$args)
{
assertType($func, 'callable', 'func');
\array_unshift($args, \is_object($subject) ? clone $subject : $subject);
if (!$func instanceof Func) {
$func = Func::make($func);
if ($func->isInternal() && !$func->isVariadic()) {
if ($nargs = $func->getNumberOfRequiredParameters()) {
$args = \array_slice($args, 0, $nargs);
}
}
}
return \call_user_func_array($func, $args);
}
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