<?php
namespace eMacros\Runtime\Value;
use eMacros\Applicable;
use eMacros\Scope;
use eMacros\GenericList;
use eMacros\Symbol;
class ValueUnset implements Applicable {
/**
* Removes a symbol from scope
* Usage: (unset _var)
* Returns: null
* (non-PHPdoc)
* @see \eMacros\Applicable::apply()
*/
public function apply(Scope $scope, GenericList $arguments) {
if (count($arguments) == 0) {
throw new \BadFunctionCallException("ValueUnset: No parameters found.");
}
if (!($arguments[0] instanceof Symbol)) {
throw new \InvalidArgumentException(sprintf("ValueUnset: Expected symbol as first argument, %s found instead.", substr(strtolower(strstr(get_class($arguments[0]), '\\')), 1)));
}
unset($scope->symbols[$arguments[0]->symbol]);
}
}
?>
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