Class: Ruby2Ruby

Inherits:
SexpProcessor
  • Object
show all
Defined in:
lib/ruby2ruby.rb

Constant Summary collapse

VERSION = 
'1.2.4'
LINE_LENGTH = 
78
ASSIGN_NODES =

Nodes that represent assignment and probably need () around them.

[
 :dasgn,
 :flip2,
 :flip3,
 :lasgn,
 :masgn,
 :attrasgn,
 :op_asgn1,
 :op_asgn2,
 :op_asgn_and,
 :op_asgn_or,
 :return,
]

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Ruby2Ruby

Returns a new instance of Ruby2Ruby.



27
28
29
30
31
32
33
34
35
 
# File 'lib/ruby2ruby.rb', line 27

def initialize
  super
  @indent = "  "
  self.auto_shift_type = true
  self.strict = true
  self.expected = String

  # self.debug[:defn] = /zsuper/
end

Instance Method Details

#cond_loop(exp, name) ⇒ Object 



796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
 
# File 'lib/ruby2ruby.rb', line 796

def cond_loop(exp, name)
  cond = process(exp.shift)
  body = process(exp.shift)
  head_controlled = exp.shift

  body = indent(body).chomp if body

  code = []
  if head_controlled then
    code << "#{name} #{cond} do"
    code << body if body
    code << "end"
  else
    code << "begin"
    code << body if body
    code << "end #{name} #{cond}"
  end
  code.join("\n")
end

#indent(s) ⇒ Object 



921
922
923
 
# File 'lib/ruby2ruby.rb', line 921

def indent(s)
  s.to_s.split(/\n/).map{|line| @indent + line}.join("\n")
end

#process_alias(exp) ⇒ Object

Processors



40
41
42
 
# File 'lib/ruby2ruby.rb', line 40

def process_alias(exp)
  "alias #{process(exp.shift)} #{process(exp.shift)}"
end

#process_and(exp) ⇒ Object 



44
45
46
 
# File 'lib/ruby2ruby.rb', line 44

def process_and(exp)
  "(#{process exp.shift} and #{process exp.shift})"
end

#process_arglist(exp) ⇒ Object

custom made node



48
49
50
51
52
53
54
 
# File 'lib/ruby2ruby.rb', line 48

def process_arglist(exp) # custom made node
  code = []
  until exp.empty? do
    code << process(exp.shift)
  end
  code.join ', '
end

#process_args(exp) ⇒ Object 



56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
 
# File 'lib/ruby2ruby.rb', line 56

def process_args(exp)
  args = []

  until exp.empty? do
    arg = exp.shift
    case arg
    when Symbol then
      args << arg
    when Array then
      case arg.first
      when :block then
        asgns = {}
        arg[1..-1].each do |lasgn|
          asgns[lasgn[1]] = process(lasgn)
        end

        args.each_with_index do |name, index|
          args[index] = asgns[name] if asgns.has_key? name
        end
      else
        raise "unknown arg type #{arg.first.inspect}"
      end
    else
      raise "unknown arg type #{arg.inspect}"
    end
  end

  return "(#{args.join ', '})"
end

#process_array(exp) ⇒ Object 



86
87
88
 
# File 'lib/ruby2ruby.rb', line 86

def process_array(exp)
  "[#{process_arglist(exp)}]"
end

#process_attrasgn(exp) ⇒ Object 



90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
 
# File 'lib/ruby2ruby.rb', line 90

def process_attrasgn(exp)
  receiver = process exp.shift
  name = exp.shift
  args = exp.empty? ? nil : exp.shift

  case name
  when :[]= then
    rhs = process args.pop
    "#{receiver}[#{process(args)}] = #{rhs}"
  else
    name = name.to_s.sub(/=$/, '')
    if args && args != s(:arglist) then
      "#{receiver}.#{name} = #{process(args)}"
    end
  end
end

#process_back_ref(exp) ⇒ Object 



107
108
109
 
# File 'lib/ruby2ruby.rb', line 107

def process_back_ref(exp)
  "$#{exp.shift}"
end

#process_begin(exp) ⇒ Object

TODO: figure out how to do rescue and ensure ENTIRELY w/o begin



112
113
114
115
116
117
118
119
120
121
122
 
# File 'lib/ruby2ruby.rb', line 112

def process_begin(exp)
  code = []
  code << "begin"
  until exp.empty?
    src = process(exp.shift)
    src = indent(src) unless src =~ /(^|\n)rescue/ # ensure no level 0 rescues
    code << src
  end
  code << "end"
  return code.join("\n")
end

#process_block(exp) ⇒ Object 



124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
 
# File 'lib/ruby2ruby.rb', line 124

def process_block(exp)
  result = []

  exp << nil if exp.empty?
  until exp.empty? do
    code = exp.shift
    if code.nil? or code.first == :nil then
      result << "# do nothing"
    else
      result << process(code)
    end
  end

  result = result.join "\n"

  result = case self.context[1]
           when nil, :scope, :if, :iter, :resbody, :when, :while then
             result + "\n"
           else
             "(#{result})"
           end

  return result
end

#process_block_pass(exp) ⇒ Object 



149
150
151
152
153
 
# File 'lib/ruby2ruby.rb', line 149

def process_block_pass exp
  raise "huh?: #{exp.inspect}" if exp.size > 1

  "&#{process exp.shift}"
end

#process_break(exp) ⇒ Object 



155
156
157
158
159
160
161
162
163
 
# File 'lib/ruby2ruby.rb', line 155

def process_break(exp)
  val = exp.empty? ? nil : process(exp.shift)
  # HACK "break" + (val ? " #{val}" : "")
  if val then
    "break #{val}"
  else
    "break"
  end
end

#process_call(exp) ⇒ Object 



165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
 
# File 'lib/ruby2ruby.rb', line 165

def process_call(exp)
  receiver_node_type = exp.first.nil? ? nil : exp.first.first
  receiver = process exp.shift

  receiver = "(#{receiver})" if
    Ruby2Ruby::ASSIGN_NODES.include? receiver_node_type

  name = exp.shift
  args = exp.shift rescue nil

  case name
  when :<=>, :==, :<, :>, :<=, :>=, :-, :+, :*, :/, :%, :<<, :>>, :** then
    "(#{receiver} #{name} #{process args})"
  when :[] then
    receiver = "self" if receiver.nil?
    "#{receiver}[#{process args}]"
  when :[]= then
    receiver = "self" if receiver.nil?
    lhs = args.pop
    "#{receiver}[#{process args}] = #{process lhs}"
  when :"-@" then
    "-#{receiver}"
  when :"+@" then
    "+#{receiver}"
  else
    args     = process args
    args     = nil            if args.empty?
    args     = "(#{args})"    if args
    receiver = "#{receiver}." if receiver

    "#{receiver}#{name}#{args}"
  end
end

#process_case(exp) ⇒ Object 



199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
 
# File 'lib/ruby2ruby.rb', line 199

def process_case(exp)
  result = []
  expr = process exp.shift
  if expr then
    result << "case #{expr}"
  else
    result << "case"
  end
  until exp.empty?
    pt = exp.shift
    if pt and pt.first == :when
      result << "#{process(pt)}"
    else
      code = indent(process(pt))
      code = indent("# do nothing") if code =~ /^\s*$/
      result << "else\n#{code}"
    end
  end
  result << "end"
  result.join("\n")
end

#process_cdecl(exp) ⇒ Object 



221
222
223
224
225
226
227
228
229
230
 
# File 'lib/ruby2ruby.rb', line 221

def process_cdecl(exp)
  lhs = exp.shift
  lhs = process lhs if Sexp === lhs
  unless exp.empty? then
    rhs = process(exp.shift)
    "#{lhs} = #{rhs}"
  else
    lhs.to_s
  end
end

#process_class(exp) ⇒ Object 



232
233
234
 
# File 'lib/ruby2ruby.rb', line 232

def process_class(exp)
  "class #{util_module_or_class(exp, true)}"
end

#process_colon2(exp) ⇒ Object 



236
237
238
 
# File 'lib/ruby2ruby.rb', line 236

def process_colon2(exp)
  "#{process(exp.shift)}::#{exp.shift}"
end

#process_colon3(exp) ⇒ Object 



240
241
242
 
# File 'lib/ruby2ruby.rb', line 240

def process_colon3(exp)
  "::#{exp.shift}"
end

#process_const(exp) ⇒ Object 



244
245
246
 
# File 'lib/ruby2ruby.rb', line 244

def process_const(exp)
  exp.shift.to_s
end

#process_cvar(exp) ⇒ Object 



248
249
250
 
# File 'lib/ruby2ruby.rb', line 248

def process_cvar(exp)
  "#{exp.shift}"
end

#process_cvasgn(exp) ⇒ Object 



252
253
254
 
# File 'lib/ruby2ruby.rb', line 252

def process_cvasgn(exp)
  "#{exp.shift} = #{process(exp.shift)}"
end

#process_cvdecl(exp) ⇒ Object 



256
257
258
 
# File 'lib/ruby2ruby.rb', line 256

def process_cvdecl(exp)
  "#{exp.shift} = #{process(exp.shift)}"
end

#process_defined(exp) ⇒ Object 



260
261
262
 
# File 'lib/ruby2ruby.rb', line 260

def process_defined(exp)
  "defined? #{process(exp.shift)}"
end

#process_defn(exp) ⇒ Object 



264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
 
# File 'lib/ruby2ruby.rb', line 264

def process_defn(exp)
  type1 = exp[1].first
  type2 = exp[2].first rescue nil

  if type1 == :args and [:ivar, :attrset].include? type2 then
    name = exp.shift
    case type2
    when :ivar then
      exp.clear
      return "attr_reader #{name.inspect}"
    when :attrset then
      exp.clear
      return "attr_writer :#{name.to_s[0..-2]}"
    else
      raise "Unknown defn type: #{exp.inspect}"
    end
  end

  case type1
  when :scope, :args then
    name = exp.shift
    args = process(exp.shift)
    args = "" if args == "()"
    body = indent(process(exp.shift))
    return "def #{name}#{args}\n#{body}\nend".gsub(/\n\s*\n+/, "\n")
  else
    raise "Unknown defn type: #{type1} for #{exp.inspect}"
  end
end

#process_defs(exp) ⇒ Object 



294
295
296
297
298
299
300
301
302
303
304
 
# File 'lib/ruby2ruby.rb', line 294

def process_defs(exp)
  lhs  = exp.shift
  var = [:self, :cvar, :dvar, :ivar, :gvar, :lvar].include? lhs.first
  name = exp.shift

  lhs = process(lhs)
  lhs = "(#{lhs})" unless var

  exp.unshift "#{lhs}.#{name}"
  process_defn(exp)
end

#process_dot2(exp) ⇒ Object 



306
307
308
 
# File 'lib/ruby2ruby.rb', line 306

def process_dot2(exp)
  "(#{process exp.shift}..#{process exp.shift})"
end

#process_dot3(exp) ⇒ Object 



310
311
312
 
# File 'lib/ruby2ruby.rb', line 310

def process_dot3(exp)
  "(#{process exp.shift}...#{process exp.shift})"
end

#process_dregx(exp) ⇒ Object 



314
315
316
 
# File 'lib/ruby2ruby.rb', line 314

def process_dregx(exp)
  "/" << util_dthing(exp, true) << "/"
end

#process_dregx_once(exp) ⇒ Object 



318
319
320
 
# File 'lib/ruby2ruby.rb', line 318

def process_dregx_once(exp)
  process_dregx(exp) + "o"
end

#process_dstr(exp) ⇒ Object 



322
323
324
 
# File 'lib/ruby2ruby.rb', line 322

def process_dstr(exp)
  "\"#{util_dthing(exp)}\""
end

#process_dsym(exp) ⇒ Object 



326
327
328
 
# File 'lib/ruby2ruby.rb', line 326

def process_dsym(exp)
  ":#{process_dstr(exp)}"
end

#process_dxstr(exp) ⇒ Object 



330
331
332
 
# File 'lib/ruby2ruby.rb', line 330

def process_dxstr(exp)
  "`#{process_dstr(exp)[1..-2]}`"
end

#process_ensure(exp) ⇒ Object 



334
335
336
337
338
339
340
341
342
343
 
# File 'lib/ruby2ruby.rb', line 334

def process_ensure(exp)
  body = process exp.shift
  ens  = exp.shift
  ens  = nil if ens == s(:nil)
  ens  = process(ens) || "# do nothing"

  body.sub!(/\n\s*end\z/, '')

  return "#{body}\nensure\n#{indent ens}"
end

#process_evstr(exp) ⇒ Object 



345
346
347
 
# File 'lib/ruby2ruby.rb', line 345

def process_evstr(exp)
  exp.empty? ? '' : process(exp.shift)
end

#process_false(exp) ⇒ Object 



349
350
351
 
# File 'lib/ruby2ruby.rb', line 349

def process_false(exp)
  "false"
end

#process_flip2(exp) ⇒ Object 



353
354
355
 
# File 'lib/ruby2ruby.rb', line 353

def process_flip2(exp)
  "#{process(exp.shift)}..#{process(exp.shift)}"
end

#process_flip3(exp) ⇒ Object 



357
358
359
 
# File 'lib/ruby2ruby.rb', line 357

def process_flip3(exp)
  "#{process(exp.shift)}...#{process(exp.shift)}"
end

#process_for(exp) ⇒ Object 



361
362
363
364
365
366
367
368
369
370
371
 
# File 'lib/ruby2ruby.rb', line 361

def process_for(exp)
  recv = process exp.shift
  iter = process exp.shift
  body = exp.empty? ? nil : process(exp.shift)

  result = ["for #{iter} in #{recv} do"]
  result << indent(body ? body : "# do nothing")
  result << "end"

  result.join("\n")
end

#process_gasgn(exp) ⇒ Object 



373
374
375
 
# File 'lib/ruby2ruby.rb', line 373

def process_gasgn(exp)
  process_iasgn(exp)
end

#process_gvar(exp) ⇒ Object 



377
378
379
 
# File 'lib/ruby2ruby.rb', line 377

def process_gvar(exp)
  return exp.shift.to_s
end

#process_hash(exp) ⇒ Object 



381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
 
# File 'lib/ruby2ruby.rb', line 381

def process_hash(exp)
  result = []
  until exp.empty?
    lhs = process(exp.shift)
    rhs = exp.shift
    t = rhs.first
    rhs = process rhs
    rhs = "(#{rhs})" unless [:lit, :str].include? t # TODO: verify better!

    result << "#{lhs} => #{rhs}"
  end

  case self.context[1]
  when :arglist, :argscat then
    unless result.empty? then
      return "#{result.join(', ')}" # HACK - this will break w/ 2 hashes as args
    else
      return "{}"
    end
  else
    return "{ #{result.join(', ')} }"
  end
end

#process_iasgn(exp) ⇒ Object 



405
406
407
408
409
410
411
412
 
# File 'lib/ruby2ruby.rb', line 405

def process_iasgn(exp)
  lhs = exp.shift
  if exp.empty? then # part of an masgn
    lhs.to_s
  else
    "#{lhs} = #{process exp.shift}"
  end
end

#process_if(exp) ⇒ Object 



414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
 
# File 'lib/ruby2ruby.rb', line 414

def process_if(exp)
  expand = Ruby2Ruby::ASSIGN_NODES.include? exp.first.first
  c = process exp.shift
  t = process exp.shift
  f = process exp.shift

  c = "(#{c.chomp})" if c =~ /\n/

  if t then
    unless expand then
      if f then
        r = "#{c} ? (#{t}) : (#{f})"
        r = nil if r =~ /return/ # HACK - need contextual awareness or something
      else
        r = "#{t} if #{c}"
      end
      return r if r and (@indent+r).size < LINE_LENGTH and r !~ /\n/
    end

    r = "if #{c} then\n#{indent(t)}\n"
    r << "else\n#{indent(f)}\n" if f
    r << "end"

    r
  else
    unless expand then
      r = "#{f} unless #{c}"
      return r if (@indent+r).size < LINE_LENGTH and r !~ /\n/
    end
    "unless #{c} then\n#{indent(f)}\nend"
  end
end

#process_iter(exp) ⇒ Object 



447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
 
# File 'lib/ruby2ruby.rb', line 447

def process_iter(exp)
  iter = process exp.shift
  args = exp.shift
  args = (args == 0) ? '' : process(args)
  body = exp.empty? ? nil : process(exp.shift)

  b, e = if iter == "END" then
           [ "{", "}" ]
         else
           [ "do", "end" ]
         end

  iter.sub!(/\(\)$/, '')

  # REFACTOR: ugh
  result = []
  result << "#{iter} {"
  result << " |#{args}|" if args
  if body then
    result << " #{body.strip} "
  else
    result << ' '
  end
  result << "}"
  result = result.join
  return result if result !~ /\n/ and result.size < LINE_LENGTH

  result = []
  result << "#{iter} #{b}"
  result << " |#{args}|" if args
  result << "\n"
  if body then
    result << indent(body.strip)
    result << "\n"
  end
  result << e
  result.join
end

#process_ivar(exp) ⇒ Object 



486
487
488
 
# File 'lib/ruby2ruby.rb', line 486

def process_ivar(exp)
  exp.shift.to_s
end

#process_lasgn(exp) ⇒ Object 



490
491
492
493
494
 
# File 'lib/ruby2ruby.rb', line 490

def process_lasgn(exp)
  s = "#{exp.shift}"
  s += " = #{process exp.shift}" unless exp.empty?
  s
end

#process_lit(exp) ⇒ Object 



496
497
498
499
500
501
502
503
504
 
# File 'lib/ruby2ruby.rb', line 496

def process_lit(exp)
  obj = exp.shift
  case obj
  when Range then
    "(#{obj.inspect})"
  else
    obj.inspect
  end
end

#process_lvar(exp) ⇒ Object 



506
507
508
 
# File 'lib/ruby2ruby.rb', line 506

def process_lvar(exp)
  exp.shift.to_s
end

#process_masgn(exp) ⇒ Object 



514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
 
# File 'lib/ruby2ruby.rb', line 514

def process_masgn(exp)
  lhs = exp.shift
  rhs = exp.empty? ? nil : exp.shift

  case lhs.first
  when :array then
    lhs.shift
    lhs = lhs.map do |l|
      case l.first
      when :masgn then
        "(#{process(l)})"
      else
        process(l)
      end
    end
  when :lasgn then
    lhs = [ splat(lhs.last) ]
  when :splat then
    lhs = [ :"*" ]
  else
    raise "no clue: #{lhs.inspect}"
  end

  if context[1] == :iter and rhs then
    lhs << splat(rhs[1])
    rhs = nil
  end

  unless rhs.nil? then
    t = rhs.first
    rhs = process rhs
    rhs = rhs[1..-2] if t == :array # FIX: bad? I dunno
    return "#{lhs.join(", ")} = #{rhs}"
  else
    return lhs.join(", ")
  end
end

#process_match(exp) ⇒ Object 



552
553
554
 
# File 'lib/ruby2ruby.rb', line 552

def process_match(exp)
  "#{process(exp.shift)}"
end

#process_match2(exp) ⇒ Object 



556
557
558
559
560
 
# File 'lib/ruby2ruby.rb', line 556

def process_match2(exp)
  lhs = process(exp.shift)
  rhs = process(exp.shift)
  "#{lhs} =~ #{rhs}"
end

#process_match3(exp) ⇒ Object 



562
563
564
565
566
 
# File 'lib/ruby2ruby.rb', line 562

def process_match3(exp)
  rhs = process(exp.shift)
  lhs = process(exp.shift)
  "#{lhs} =~ #{rhs}"
end

#process_module(exp) ⇒ Object 



568
569
570
 
# File 'lib/ruby2ruby.rb', line 568

def process_module(exp)
  "module #{util_module_or_class(exp)}"
end

#process_next(exp) ⇒ Object 



572
573
574
575
576
577
578
579
 
# File 'lib/ruby2ruby.rb', line 572

def process_next(exp)
  val = exp.empty? ? nil : process(exp.shift)
  if val then
    "next #{val}"
  else
    "next"
  end
end

#process_nil(exp) ⇒ Object 



581
582
583
 
# File 'lib/ruby2ruby.rb', line 581

def process_nil(exp)
  "nil"
end

#process_not(exp) ⇒ Object 



585
586
587
 
# File 'lib/ruby2ruby.rb', line 585

def process_not(exp)
  "(not #{process exp.shift})"
end

#process_nth_ref(exp) ⇒ Object 



589
590
591
 
# File 'lib/ruby2ruby.rb', line 589

def process_nth_ref(exp)
  "$#{exp.shift}"
end

#process_op_asgn1(exp) ⇒ Object 



593
594
595
596
597
598
599
600
601
 
# File 'lib/ruby2ruby.rb', line 593

def process_op_asgn1(exp)
  # [[:lvar, :b], [:arglist, [:lit, 1]], :"||", [:lit, 10]]
  lhs = process(exp.shift)
  index = process(exp.shift)
  msg = exp.shift
  rhs = process(exp.shift)

  "#{lhs}[#{index}] #{msg}= #{rhs}"
end

#process_op_asgn2(exp) ⇒ Object 



603
604
605
606
607
608
609
610
611
612
 
# File 'lib/ruby2ruby.rb', line 603

def process_op_asgn2(exp)
  # [[:lvar, :c], :var=, :"||", [:lit, 20]]
  lhs = process(exp.shift)
  index = exp.shift.to_s[0..-2]
  msg = exp.shift

  rhs = process(exp.shift)

  "#{lhs}.#{index} #{msg}= #{rhs}"
end

#process_op_asgn_and(exp) ⇒ Object 



614
615
616
617
618
619
 
# File 'lib/ruby2ruby.rb', line 614

def process_op_asgn_and(exp)
  # a &&= 1
  # [[:lvar, :a], [:lasgn, :a, [:lit, 1]]]
  exp.shift
  process(exp.shift).sub(/\=/, '&&=')
end

#process_op_asgn_or(exp) ⇒ Object 



621
622
623
624
625
626
 
# File 'lib/ruby2ruby.rb', line 621

def process_op_asgn_or(exp)
  # a ||= 1
  # [[:lvar, :a], [:lasgn, :a, [:lit, 1]]]
  exp.shift
  process(exp.shift).sub(/\=/, '||=')
end

#process_or(exp) ⇒ Object 



628
629
630
 
# File 'lib/ruby2ruby.rb', line 628

def process_or(exp)
  "(#{process exp.shift} or #{process exp.shift})"
end

#process_postexe(exp) ⇒ Object 



632
633
634
 
# File 'lib/ruby2ruby.rb', line 632

def process_postexe(exp)
  "END"
end

#process_redo(exp) ⇒ Object 



636
637
638
 
# File 'lib/ruby2ruby.rb', line 636

def process_redo(exp)
  "redo"
end

#process_resbody(exp) ⇒ Object 



640
641
642
643
644
645
646
647
648
649
650
651
 
# File 'lib/ruby2ruby.rb', line 640

def process_resbody exp
  args = exp.shift
  body = process(exp.shift) || "# do nothing"

  name =   args.lasgn true
  name ||= args.iasgn true
  args = process(args)[1..-2]
  args = " #{args}" unless args.empty?
  args += " => #{name[1]}" if name

  "rescue#{args}\n#{indent body}"
end

#process_rescue(exp) ⇒ Object 



653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
 
# File 'lib/ruby2ruby.rb', line 653

def process_rescue exp
  body = process(exp.shift) unless exp.first.first == :resbody
  els  = process(exp.pop)   unless exp.last.first  == :resbody

  body ||= "# do nothing"
  simple = exp.size == 1

  resbodies = []
  until exp.empty? do
    resbody = exp.shift
    simple &&= resbody[1] == s(:array) && resbody[2] != nil
    resbodies << process(resbody)
  end

  if els then
    "#{indent body}\n#{resbodies.join("\n")}\nelse\n#{indent els}"
  elsif simple then
    resbody = resbodies.first.sub(/\n\s*/, ' ')
    "#{body} #{resbody}"
  else
    "#{indent body}\n#{resbodies.join("\n")}"
  end
end

#process_retry(exp) ⇒ Object 



677
678
679
 
# File 'lib/ruby2ruby.rb', line 677

def process_retry(exp)
  "retry"
end

#process_return(exp) ⇒ Object 



681
682
683
684
685
686
687
688
689
 
# File 'lib/ruby2ruby.rb', line 681

def process_return(exp)
  # HACK return "return" + (exp.empty? ? "" : " #{process exp.shift}")

  if exp.empty? then
    return "return"
  else
    return "return #{process exp.shift}"
  end
end

#process_sclass(exp) ⇒ Object 



691
692
693
 
# File 'lib/ruby2ruby.rb', line 691

def process_sclass(exp)
  "class << #{process(exp.shift)}\n#{indent(process(exp.shift))}\nend"
end

#process_scope(exp) ⇒ Object 



695
696
697
 
# File 'lib/ruby2ruby.rb', line 695

def process_scope(exp)
  exp.empty? ? "" : process(exp.shift)
end

#process_self(exp) ⇒ Object 



699
700
701
 
# File 'lib/ruby2ruby.rb', line 699

def process_self(exp)
  "self"
end

#process_splat(exp) ⇒ Object 



703
704
705
706
707
708
709
 
# File 'lib/ruby2ruby.rb', line 703

def process_splat(exp)
  if exp.empty? then
    "*"
  else
    "*#{process(exp.shift)}"
  end
end

#process_str(exp) ⇒ Object 



711
712
713
 
# File 'lib/ruby2ruby.rb', line 711

def process_str(exp)
  return exp.shift.dump
end

#process_super(exp) ⇒ Object 



715
716
717
718
719
720
721
722
 
# File 'lib/ruby2ruby.rb', line 715

def process_super(exp)
  args = []
  until exp.empty? do
    args << process(exp.shift)
  end

  "super(#{args.join(', ')})"
end

#process_svalue(exp) ⇒ Object 



724
725
726
727
728
729
730
 
# File 'lib/ruby2ruby.rb', line 724

def process_svalue(exp)
  code = []
  until exp.empty? do
    code << process(exp.shift)
  end
  code.join(", ")
end

#process_to_ary(exp) ⇒ Object 



732
733
734
 
# File 'lib/ruby2ruby.rb', line 732

def process_to_ary(exp)
  process(exp.shift)
end

#process_true(exp) ⇒ Object 



736
737
738
 
# File 'lib/ruby2ruby.rb', line 736

def process_true(exp)
  "true"
end

#process_undef(exp) ⇒ Object 



740
741
742
 
# File 'lib/ruby2ruby.rb', line 740

def process_undef(exp)
  "undef #{process(exp.shift)}"
end

#process_until(exp) ⇒ Object 



744
745
746
 
# File 'lib/ruby2ruby.rb', line 744

def process_until(exp)
  cond_loop(exp, 'until')
end

#process_valias(exp) ⇒ Object 



748
749
750
 
# File 'lib/ruby2ruby.rb', line 748

def process_valias(exp)
  "alias #{exp.shift} #{exp.shift}"
end

#process_when(exp) ⇒ Object 



752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
 
# File 'lib/ruby2ruby.rb', line 752

def process_when(exp)
  src = []

  if self.context[1] == :array then # ugh. matz! why not an argscat?!?
    val = process(exp.shift)
    exp.shift # empty body
    return "*#{val}"
  end

  until exp.empty?
    cond = process(exp.shift).to_s[1..-2]
    code = indent(process(exp.shift))
    code = indent "# do nothing" if code =~ /\A\s*\Z/
    src << "when #{cond} then\n#{code.chomp}"
  end

  src.join("\n")
end

#process_while(exp) ⇒ Object 



771
772
773
 
# File 'lib/ruby2ruby.rb', line 771

def process_while(exp)
  cond_loop(exp, 'while')
end

#process_xstr(exp) ⇒ Object 



775
776
777
 
# File 'lib/ruby2ruby.rb', line 775

def process_xstr(exp)
  "`#{process_str(exp)[1..-2]}`"
end

#process_yield(exp) ⇒ Object 



779
780
781
782
783
784
785
786
787
788
789
790
 
# File 'lib/ruby2ruby.rb', line 779

def process_yield(exp)
  args = []
  until exp.empty? do
    args << process(exp.shift)
  end

  unless args.empty? then
    "yield(#{args.join(', ')})"
  else
    "yield"
  end
end

#process_zsuper(exp) ⇒ Object 



792
793
794
 
# File 'lib/ruby2ruby.rb', line 792

def process_zsuper(exp)
  "super"
end

#rewrite_attrasgn(exp) ⇒ Object

Rewriters:



819
820
821
822
823
824
825
826
 
# File 'lib/ruby2ruby.rb', line 819

def rewrite_attrasgn exp
  if context.first(2) == [:array, :masgn] then
    exp[0] = :call
    exp[2] = exp[2].to_s.sub(/=$/, '').to_sym
  end

  exp
end

#rewrite_ensure(exp) ⇒ Object 



828
829
830
831
 
# File 'lib/ruby2ruby.rb', line 828

def rewrite_ensure exp
  exp = s(:begin, exp) unless context.first == :begin
  exp
end

#rewrite_rescue(exp) ⇒ Object 



833
834
835
836
837
838
839
840
841
842
843
844
845
 
# File 'lib/ruby2ruby.rb', line 833

def rewrite_rescue exp
  complex = false
  complex ||= exp.size > 3
  complex ||= exp.block
  complex ||= exp.find_nodes(:resbody).any? { |n| n.array != s(:array) }
  complex ||= exp.find_nodes(:resbody).any? { |n| n.last.nil? }

  handled = context.first == :ensure

  exp = s(:begin, exp) if complex unless handled

  exp
end

#rewrite_svalue(exp) ⇒ Object 



847
848
849
850
851
852
853
854
855
856
 
# File 'lib/ruby2ruby.rb', line 847

def rewrite_svalue(exp)
  case exp.last.first
  when :array
    s(:svalue, *exp[1][1..-1])
  when :splat
    exp
  else
    raise "huh: #{exp.inspect}"
  end
end

#splat(sym) ⇒ Object 



510
511
512
 
# File 'lib/ruby2ruby.rb', line 510

def splat(sym)
  :"*#{sym}"
end

#util_dthing(exp, regx = false) ⇒ Object

Utility Methods:



861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
 
# File 'lib/ruby2ruby.rb', line 861

def util_dthing(exp, regx = false)
  s = []
  suck = true
  x = exp.shift.gsub(/"/, '\"').gsub(/\n/, '\n')
  x.gsub!(/\//, '\/') if regx

  s << x
  until exp.empty?
    pt = exp.shift
    case pt
    when Sexp then
      case pt.first
      when :str then
        x = pt.last.gsub(/"/, '\"').gsub(/\n/, '\n')
        x.gsub!(/\//, '\/') if regx
        s << x
      else
        s << '#{' << process(pt) << '}' # do not use interpolation here
      end
    else
      # HACK: raise "huh?: #{pt.inspect}"
      # do nothing for now
    end
  end

  s.join
end

#util_module_or_class(exp, is_class = false) ⇒ Object 



889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
 
# File 'lib/ruby2ruby.rb', line 889

def util_module_or_class(exp, is_class=false)
  result = []

  name = exp.shift
  name = process name if Sexp === name

  result << name

  if is_class then
    superk = process(exp.shift)
    result << " < #{superk}" if superk
  end

  result << "\n"

  body = []
  begin
    code = process(exp.shift)
    body << code.chomp unless code.nil? or code.chomp.empty?
  end until exp.empty?

  unless body.empty? then
    body = indent(body.join("\n\n")) + "\n"
  else
    body = ""
  end
  result << body
  result << "end"

  result.join
end