Class: Rsec::Maybe

Inherits:
Unary
  • Object
show all
Defined in:
lib/rsec/parsers/repeat.rb

Overview

the content appears 1 or 0 time

Instance Attribute Summary

Attributes inherited from Unary

#some

Attributes included from Parser

#name

Instance Method Summary collapse

Methods included from Parser

#&, #*, #<<, #>>, #^, #cached, #eof, #fail, #inspect, #join, #map, #maybe, #parse, #parse!, #star, #|

Instance Method Details

#_parse(ctx) ⇒ Object 



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# File 'lib/rsec/parsers/repeat.rb', line 5

def _parse ctx
  save = ctx.pos
  res = some._parse ctx
  if INVALID[res]
    ctx.pos = save
    []
  else
    [res]
  end
end