<?php
namespace eMacros\Runtime\Symbol;
use eMacros\Applicable;
use eMacros\Scope;
use eMacros\GenericList;
use eMacros\Environment\Environment;
use eMacros\Symbol;
class SymbolSet implements Applicable {
/**
* Defines a symbol value
* Usage: (sym "value") (sym "counter" 0)
* Returns: NULL
* (non-PHPdoc)
* @see \eMacros\Applicable::apply()
*/
public function apply(Scope $scope, GenericList $arguments) {
if (count($arguments) == 0) {
throw new \BadFunctionCallException("SymbolSet: No parameters found.");
}
$ref = $arguments[0]->evaluate($scope);
if (!is_string($ref) || empty($ref)) {
throw new \InvalidArgumentException("SymbolSet: Symbol must be specified as a non-empty string.");
}
Symbol::validateSymbol($ref);
$value = (count($arguments) > 1) ? $arguments[1]->evaluate($scope) : null;
$scope->symbols[$ref] = $value;
}
}
?>
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