class GenMachine::CharSet

Attributes

kind[RW]

Public Class Methods

new(kind = :include) click to toggle source
# File lib/genmachine/char_set.rb, line 4
def initialize(kind = :include)
  @kind = kind
  @include_intervals = []
  @include_any = false
end

Public Instance Methods

+(val) click to toggle source
# File lib/genmachine/char_set.rb, line 24
def +(val) self.send(:<<,val) end
<<(val) click to toggle source
# File lib/genmachine/char_set.rb, line 25
def <<(val)
  if val.is_a?(String) && val =~ /([^-])-([^-])/
      include_range($1,$2)
  elsif val.is_a?(Range)
    include_range(val.first, val.last)
  elsif val == :any
    @include_any = true
  else include_char(val) end
end
[](k) click to toggle source
# File lib/genmachine/char_set.rb, line 11
def [](k) for_conditional[k] end
for_conditional() click to toggle source
# File lib/genmachine/char_set.rb, line 13
def for_conditional
  if @include_any
    return {:kind=>@kind, :ranges=>[:any]}
  else
    ivals = @include_intervals.map do |a,b|
      a == b ? a : [a,b]
    end
    return {:kind=>@kind, :ranges=>ivals}
  end
end
include_char(char) click to toggle source
# File lib/genmachine/char_set.rb, line 35
def include_char(char) include_range(char,char) end
include_range(from, to) click to toggle source
# File lib/genmachine/char_set.rb, line 37
def include_range(from, to)
  from = from.to_utf8_char_array[0] if from.is_a?(String)
  to = to.to_utf8_char_array[0] if to.is_a?(String)
  @include_intervals << [from,to].sort
  if @include_intervals.length > 1
    @include_intervals.sort!
    merged = []
    curr_a, curr_b = @include_intervals.shift
    @include_intervals.each_with_index do |ab,i|
      a,b = ab
      if a <= (curr_b+1)
        curr_b = [curr_b,b].max
      else
        merged << [curr_a, curr_b]
        curr_a,curr_b = ab
      end
    end
    merged << [curr_a, curr_b]
    @include_intervals = merged
  end
end
inspect() click to toggle source
# File lib/genmachine/char_set.rb, line 10
def inspect() for_conditional.inspect end