Class: Rsec::RepeatRange

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

Overview

repeat from range.begin.abs to range.end.abs <br/> note: range’s max should always be > 0<br/>

see also helpers

Instance Attribute Summary

Attributes included from Parser

#name

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Parser

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

Constructor Details

#initialize(base, range) ⇒ RepeatRange

Returns a new instance of RepeatRange.



27
28
29
30
31
 
# File 'lib/rsec/parsers/repeat.rb', line 27

def initialize base, range
  @base = base
  @at_least = range.min.abs
  @optional = range.max - @at_least
end

Class Method Details

.[](base, range) ⇒ Object 



23
24
25
 
# File 'lib/rsec/parsers/repeat.rb', line 23

def self.[] base, range
  self.new base, range
end

Instance Method Details

#_parse(ctx) ⇒ Object 



33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
 
# File 'lib/rsec/parsers/repeat.rb', line 33

def _parse ctx
  rp_node = []
  @at_least.times do
    res = @base._parse ctx
    return INVALID if INVALID[res]
    rp_node.push res
  end
  @optional.times do
    save = ctx.pos
    res = @base._parse ctx
    if INVALID[res]
      ctx.pos = save
      break
    end
    rp_node.push res
  end
  rp_node
end