Contents

$:.push(File.dirname(__FILE__))
require 'edn/version'
require 'edn/core_ext'
require 'edn/types'
require 'edn/parser'
require 'edn/transform'
require 'edn/reader'

module EDN
  class ParseFailed < StandardError
    attr_reader :original_exception

    def initialize(message, original_exception)
      super(message)
      @original_exception = original_exception
    end
  end

  @parser = EDN::Parser.new
  @transform = EDN::Transform.new
  @tags = Hash.new

  def self.read(edn)
    begin
      tree = @parser.parse(edn)
    rescue Parslet::ParseFailed => error
      message = "Invalid EDN, cannot parse: #{edn}"
      raise ParseFailed.new(message, error)
    end
    @transform.apply(tree)
  end

  def self.register(tag, func = nil, &block)
    if block_given?
      func = block
    end

    if func.nil?
      func = lambda { |x| x }
    end

    if func.is_a?(Class)
      @tags[tag] = lambda { |*args| func.new(*args) }
    else
      @tags[tag] = func
    end
  end

  def self.unregister(tag)
    @tags[tag] = nil
  end

  def self.tagged_element(tag, element)
    func = @tags[tag]
    if func
      func.call(element)
    else
      EDN::Type::Unknown.new(tag, element)
    end
  end

  def self.tagout(tag, element)
    ["##{tag}", element.to_edn].join(" ")
  end

  def self.symbol(text)
    EDN::Type::Symbol.new(text)
  end

  def self.list(*values)
    EDN::Type::List.new(*values)
  end
end

EDN.register("inst") do |value|
  DateTime.parse(value)
end

EDN.register("uuid") do |value|
  EDN::Type::UUID.new(value)
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
edn-1.0.3	lib/edn.rb
edn-1.0.2	lib/edn.rb
edn-1.0.1	lib/edn.rb