Class: GenMachine::CharSet

Inherits:
Object
  • Object
show all
Defined in:
lib/genmachine/char_set.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(kind = :include) ⇒ CharSet

Returns a new instance of CharSet.



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# File 'lib/genmachine/char_set.rb', line 4

def initialize(kind = :include)
  @kind = kind
  @include_intervals = []
  @include_any = false
end

Instance Attribute Details

#kind ⇒ Object

Returns the value of attribute kind.



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# File 'lib/genmachine/char_set.rb', line 3

def kind
  @kind
end

Instance Method Details

#+(val) ⇒ Object 



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# File 'lib/genmachine/char_set.rb', line 24

def +(val) self.send(:<<,val) end

#<<(val) ⇒ Object 



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# 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) ⇒ Object 



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# File 'lib/genmachine/char_set.rb', line 11

def [](k) for_conditional[k] end

#for_conditional ⇒ Object 



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# 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) ⇒ Object 



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# File 'lib/genmachine/char_set.rb', line 35

def include_char(char) include_range(char,char) end

#include_range(from, to) ⇒ Object 



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# 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 ⇒ Object 



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# File 'lib/genmachine/char_set.rb', line 10

def inspect() for_conditional.inspect end