require 'spec_helper'

RSpec.describe('Conditional lexing') do
  include_examples 'lex', /(?<A>a)(?(<A>)b|c)/,
    3 => [:conditional, :open,       '(?',     7,  9, 0, 0, 0],
    4 => [:conditional, :condition,  '(<A>)',  9, 14, 0, 0, 1],
    6 => [:conditional, :separator,  '|',     15, 16, 0, 0, 1],
    8 => [:conditional, :close,      ')',     17, 18, 0, 0, 0]

  include_examples 'lex', /((?<A>a)(?<B>(?(<A>)b|((?(<B>)[e-g]|[h-j])))))/,
     0 => [:group,       :capture,     '(',       0,  1, 0, 0, 0],
     1 => [:group,       :named,       '(?<A>',   1,  6, 1, 0, 0],
     5 => [:conditional, :open,        '(?',     13, 15, 2, 0, 0],
     6 => [:conditional, :condition,   '(<A>)',  15, 20, 2, 0, 1],
     8 => [:conditional, :separator,   '|',      21, 22, 2, 0, 1],
    10 => [:conditional, :open,        '(?',     23, 25, 3, 0, 1],
    11 => [:conditional, :condition,   '(<B>)',  25, 30, 3, 0, 2],
    12 => [:set,         :open,        '[',      30, 31, 3, 0, 2],
    13 => [:literal,     :literal,     'e',      31, 32, 3, 1, 2],
    14 => [:set,         :range,       '-',      32, 33, 3, 1, 2],
    15 => [:literal,     :literal,     'g',      33, 34, 3, 1, 2],
    16 => [:set,         :close,       ']',      34, 35, 3, 0, 2],
    17 => [:conditional, :separator,   '|',      35, 36, 3, 0, 2],
    23 => [:conditional, :close,       ')',      41, 42, 3, 0, 1],
    25 => [:conditional, :close,       ')',      43, 44, 2, 0, 0],
    26 => [:group,       :close,       ')',      44, 45, 1, 0, 0],
    27 => [:group,       :close,       ')',      45, 46, 0, 0, 0]

  include_examples 'lex', /(a(b(c)))(?(1)(?(2)(?(3)d|e))|(?(3)(?(2)f|g)|(?(1)f|g)))/,
     9 => [:conditional, :open,       '(?',    9, 11, 0, 0, 0],
    10 => [:conditional, :condition,  '(1)',  11, 14, 0, 0, 1],
    11 => [:conditional, :open,       '(?',   14, 16, 0, 0, 1],
    12 => [:conditional, :condition,  '(2)',  16, 19, 0, 0, 2],
    13 => [:conditional, :open,       '(?',   19, 21, 0, 0, 2],
    14 => [:conditional, :condition,  '(3)',  21, 24, 0, 0, 3],
    16 => [:conditional, :separator,  '|',    25, 26, 0, 0, 3],
    18 => [:conditional, :close,      ')',    27, 28, 0, 0, 2],
    19 => [:conditional, :close,      ')',    28, 29, 0, 0, 1],
    20 => [:conditional, :separator,  '|',    29, 30, 0, 0, 1],
    21 => [:conditional, :open,       '(?',   30, 32, 0, 0, 1],
    22 => [:conditional, :condition,  '(3)',  32, 35, 0, 0, 2],
    23 => [:conditional, :open,       '(?',   35, 37, 0, 0, 2],
    24 => [:conditional, :condition,  '(2)',  37, 40, 0, 0, 3],
    26 => [:conditional, :separator,  '|',    41, 42, 0, 0, 3],
    28 => [:conditional, :close,      ')',    43, 44, 0, 0, 2],
    29 => [:conditional, :separator,  '|',    44, 45, 0, 0, 2],
    30 => [:conditional, :open,       '(?',   45, 47, 0, 0, 2],
    31 => [:conditional, :condition,  '(1)',  47, 50, 0, 0, 3],
    33 => [:conditional, :separator,  '|',    51, 52, 0, 0, 3],
    35 => [:conditional, :close,      ')',    53, 54, 0, 0, 2],
    36 => [:conditional, :close,      ')',    54, 55, 0, 0, 1],
    37 => [:conditional, :close,      ')',    55, 56, 0, 0, 0]
end