<?php
namespace eMacros\Program;
use eMacros\Parser;
use eMacros\Environment\Environment;
use eMacros\GenericList;
abstract class Program {
/**
* Program internal expressions
* @var \eMacros\GenericList
*/
public $expressions;
public function __construct($program) {
$this->expressions = Parser::parse($program, true);
}
public function offsetGet($offset) {
return $this->expressions[$offset];
}
public function offsetExists($offset) {
return array_key_exists($offset, $this->expressions);
}
public function offsetSet($_, $__) {
throw new \BadMethodCallException('Program object is immutable');
}
public function offsetUnset($_) {
throw new \BadMethodCallException('Program object is immutable');
}
public function getIterator() {
return new \ArrayIterator($this->expressions);
}
public function count() {
return count($this->expressions);
}
public function executeWith(Environment $env, array $args) {
array_unshift($args, $env);
return call_user_func_array(array($this, 'execute'), $args);
}
public abstract function execute(Environment $env);
}
?>
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