# -*- encoding : utf-8 -*-

module Lines
  module Error
    # Used to mark non-lines errors as being part of the library. This lets
    # a library user `rescue Lines::Error => ex` and catch all exceptions
    # comming from the lines library.
    def self.tag(obj)
      obj.extend Error
    end
  end

  class ParseError < StandardError; include Error; end
  #class LogicError < RuntimeError; include Error; end

  LIT_TRUE  = '#t'
  LIT_FALSE = '#f'
  LIT_NIL   = 'nil'

  SPACE         = ' '
  EQUAL         = '='
  OPEN_BRACE    = '{'
  SHUT_BRACE    = '}'
  OPEN_BRACKET  = '['
  SHUT_BRACKET  = ']'
  SINGLE_QUOTE  = "'"
  DOUBLE_QUOTE  = '"'
  DOT_DOT_DOT   = '...'

  BACKSLASH             = '\\'
  ESCAPED_SINGLE_QUOTE  = "\\'"
  ESCAPED_DOUBLE_QUOTE  = '\"'

  NUM_MATCH             = /-?(?:0|[1-9])\d*(?:\.\d+)?(?:[eE][+-]\d+)?/
  ISO8601_ZULU_CAPTURE  = /^(\d\d\d\d)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)Z$/
  NUM_CAPTURE           = /^(#{NUM_MATCH})$/
end