class MARC::Spec::Parsing::ClosedLcAlphaRange

Constants

LCALPHA_RANGE_RE
SIMPLE_CLASS_NAME

Public Instance Methods

to_s_inner(_prec) click to toggle source
# File lib/marc/spec/parsing/closed_lc_alpha_range.rb, line 22
def to_s_inner(_prec)
  SIMPLE_CLASS_NAME
end
try(source, context, _consume_all) click to toggle source
# File lib/marc/spec/parsing/closed_lc_alpha_range.rb, line 11
def try(source, context, _consume_all)
  source_str = source.instance_variable_get(:@str) # TODO: something less hacky
  return context.err(self, source, 'Not a lower-case alphabetic range') unless (range_str = source_str.check(LCALPHA_RANGE_RE))

  s, e = range_str.match(LCALPHA_RANGE_RE)[1, 2]
  return context.err(self, source, "#{s} !<= #{e}") unless s < e

  sv, _, ev = [s.size, 1, e.size].map { |l| source.consume(l) } # discard hyphen
  succ(from: sv, to: ev)
end