File: README.txt

# README.txt

Path: | README.txt
Last Update: | Tue Aug 10 02:55:28 -0600 2010

# polyglot

- polyglot.rubyforge.org

## DESCRIPTION:

Author: Clifford Heath, 2007

The Polyglot library allows a Ruby module to register a loader for the file type associated with a filename extension, and it augments ‘require’ to find and load matching files.

This supports the creation of DSLs having a syntax that is most appropriate to their purpose, instead of abusing the Ruby syntax.

Files are sought using the normal Ruby search path.

## EXAMPLE:

In file rubyglot.rb, define and register a file type handler:

        require 'polyglot'

        class RubyglotLoader
          def self.load(filename, options = nil, &block)
            File.open(filename) {|file|
              # Load the contents of file as Ruby code:
              # Implement your parser here instead!
              Kernel.eval(file.read)
            }
          end
        end

        Polyglot.register("rgl", RubyglotLoader)

In file test.rb:

        require 'rubyglot'  # Create my file type handler
        require 'hello'     # Can add extra options or even a block here
        puts "Ready to go"
        Hello.new

In file hello.rgl (this simple example uses Ruby code):

        puts "Initializing"
        class Hello
          def initialize()
            puts "Hello, world\n"
          end
        end

Run:

        $ ruby test.rb
        Initializing
        Ready to go
        Hello, world
        $

## INSTALL:

sudo gem install polyglot

## LICENSE:

(The MIT License)

Copyright (c) 2007 Clifford Heath

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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