Method: CDDL::Parser#initialize

Defined in:
lib/cddl.rb

#initialize(source_text) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/cddl.rb', line 46

def initialize(source_text)
  @abnf = Peggy::ABNF.new
  _cresult = @abnf.compile! ABNF_SPEC, ignore: :s
  presult = @abnf.parse? :cddl, (source_text + PRELUDE)
  expected_length = source_text.length + PRELUDE.length
  if expected_length != presult
    upto = @abnf.parse_results.keys.max
    puts "UPTO: #{upto}" if $advanced
    pp @abnf.parse_results[upto] if $advanced
    pp @abnf.parse_results[presult] if $advanced
    puts "SO FAR: #{presult}"  if $advanced
    puts @abnf.ast? if $advanced
    presult ||= 0
    part1 = source_text[[presult - 100, 0].max...presult]
    part3 = source_text[upto...[upto + 100, source_text.length].min]
    if upto - presult < 100
      part2 = source_text[presult...upto]
    else
      part2 = source_text[presult, 50] + "......." + (source_text[upto-50, 50] || "")
    end
    warn "*** Look for syntax problems around the #{
           "%%%".colorize(background: :light_yellow)} markers:\n#{
           part1}#{"%%%".colorize(color: :green, background: :light_yellow)}#{
           part2}#{"%%%".colorize(color: :red, background: :light_yellow)}#{
           part3}"
    raise ParseError, "*** Parse error at #{presult} upto #{upto} of #{
                      source_text.length} (#{expected_length})."
  end
  puts @abnf.ast? if $debug_ast
  @ast = @abnf.ast?
  # our little argument stack for rule processing
  @insides = []
  # collect error information
  @last_message = ""
end