THIS IS A WORK IN PROGRESS AND IN A STATE OF EXPERIMENTATION
This is a Bundle, which integrates Dissect into your Symfony2 project.
Add dependency to your composer.json:
{
"require": {
"cursedcoder/dark-dissect-bundle": "*"
}
}Run composer update cursedcoder/dark-dissect-bundle
First of all, configure bundle in your Symfony2 app.
dark_dissect:
calculator:
path: "%kernel.root_dir%/../calculator.yml"
# my_cool_language:
# path: "%kernel.root_dir%/../my_cool_language.yml"Now define lexis and grammar of your new language
# calculator.yml
language:
lexis:
regex:
int: '/[1-9][0-9]*/'
wsp: '/[ \r\n\t]+/'
tokens:
- "("
- ")"
- "+"
- "*"
- "**"
skip: [wsp]
grammar:
start_rule: additive
default_context: Calculator
rules:
- additive:
statement: [additive, +, multiplicative]
call: ~ # will call calculator context, method additive by default
# call: { context: MyCustomContext, method: MyCustomMethod }
- additive:
statement: [multiplicative]
- multiplicative:
statement: [multiplicative, *, power]
call: ~
- multiplicative:
statement: [power]
- power:
statement: [primary, **, power]
call: ~
- power:
statement: [primary]
- primary:
statement: [(, additive, )]
call: ~
- primary:
statement: [int]Now we are ready to describe language context. Create a context class somewhere in your project.
<?php
namespace Acme;
use Dark\DissectBundle\Context\ContextInterface;
class CalculatorContext implements ContextInterface
{
public function getName()
{
return 'Calculator';
}
public function additive($left, $plus, $right)
{
return $left + $right;
}
public function multiplicative($left, $times, $right)
{
return $left * $right;
}
public function power($left, $pow, $right)
{
return pow($left, $right);
}
public function primary($l, $expr, $r)
{
return $expr;
}
}And define it as service, with dissect.context tag.
services:
my_calculator_context:
class: Acme\CalculatorContext
tags:
- { name: dissect.context }And finally use it:
$language = $container->get('dissect.language_repository')->get('calculator');
echo $language->read('6 ** (1 + 1) ** 2 * (5 + 4)'); // 11664- Evgeniy Guseletov cursedcoder [creator of bundle]
- Jakub Lédl jakubledl [creator of Dissect]
- Other awesome developers