<?php
namespace eMacros\Runtime\Callback;
use eMacros\Applicable;
use eMacros\Scope;
use eMacros\GenericList;
class CallFunction implements Applicable {
public function apply(Scope $scope, GenericList $arguments) {
if (count($arguments) == 0) {
throw new \BadFunctionCallException("CallFunction: No parameters found.");
}
$callback = $arguments[0]->evaluate($scope);
//check for valid callback
if (!is_callable($callback)) {
throw new \InvalidArgumentException("CallFunction: Argument is not a valid callback.");
}
if ($callback instanceof Applicable) {
$args = $arguments->shift();
if (is_null($args)) {
$args = new GenericList();
}
return $callback->apply($scope, $args);
}
//extract parameters
$args = array_slice($arguments->getArrayCopy(), 1);
$param_array = array();
foreach ($args as $arg) {
$param_array[] = $arg->evaluate($scope);
}
return call_user_func_array($callback, $param_array);
}
}
?>
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