File: src/eMacros/Program/Program.php

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File: src/eMacros/Program/Program.php
Role: Class source
Content type: text/plain
Description: Class source
Class: eMacros
PHP LISP language interpreter
Author: By
Last change:
Date: 7 years ago
Size: 1,113 bytes
 

Contents

Class file image Download
<?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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