Class: Ruby2Ruby

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

Overview

Generate ruby code from a sexp.

Constant Summary collapse

VERSION =

:nodoc:

"2.6.1"
LINE_LENGTH =

cutoff for one-liners

78
BINARY =

binary operation messages

[:<=>, :==, :<, :>, :<=, :>=, :-, :+, :*, :/, :%, :<<, :>>, :**, :"!=", :^, :|, :&]
ASSIGN_NODES =

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

TODO: this should be replaced with full precedence support :/

[
 :dasgn,
 :flip2,
 :flip3,
 :lasgn,
 :masgn,
 :match3,
 :attrasgn,
 :op_asgn1,
 :op_asgn2,
 :op_asgn_and,
 :op_asgn_or,
 :return,
 :if, # HACK
 :rescue,
]
HASH_VAL_NO_PAREN =

Some sexp types are OK without parens when appearing as hash values. This list can include ‘:call`s because they’re always printed with parens around their arguments. For example:

{ :foo => (bar("baz")) } # The outer parens are unnecessary
{ :foo => bar("baz") }   # This is the normal code style

[
  :call,
  :false,
  :lit,
  :lvar,
  :nil,
  :str,
  :true,
]
MUST_BE_CURLY = 
%w[ BEGIN END ]

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Ruby2Ruby

:nodoc:



82
83
84
85
86
87
88
89
90
91
92
 
# File 'lib/ruby2ruby.rb', line 82

def initialize # :nodoc:
  super
  @indent = "  "
  self.require_empty = false
  self.strict = true
  self.expected = String

  @calls = []

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

Instance Method Details

#__var(name) ⇒ Object 



383
384
385
386
387
388
389
390
391
392
 
# File 'lib/ruby2ruby.rb', line 383

def __var name
  case context[1]
  when /_pat$/ then
    "^#{name}"
  when :in then
    "^#{name}"
  else
    name.to_s
  end
end

#comments(exp) ⇒ Object

:nodoc:



353
354
355
356
357
 
# File 'lib/ruby2ruby.rb', line 353

def comments exp # :nodoc:
  comments = exp.comments
  comments += "\n" unless comments.end_with?("\n") if comments
  comments
end

#cond_loop(exp, name) ⇒ Object

Generate a post-or-pre conditional loop.



1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
 
# File 'lib/ruby2ruby.rb', line 1326

def cond_loop(exp, name)
  _, cond, body, head_controlled = exp

  cond = process cond
  body = process body

  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

#dthing_escape(type, lit) ⇒ Object

Utility method to escape something interpolated.



1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
 
# File 'lib/ruby2ruby.rb', line 1351

def dthing_escape type, lit
  # TODO: this needs more testing
  case type
  when :dregx then
    lit.gsub(/(\A|[^\\])\//, '\1\/')
  when :dstr, :dsym then
    lit.dump[1..-2]
  when :dxstr then
    lit.gsub(/`/, '\`')
  else
    raise "unsupported type #{type.inspect}"
  end
end

#indent(s) ⇒ Object

Indent all lines of s to the current indent level.



1368
1369
1370
 
# File 'lib/ruby2ruby.rb', line 1368

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

#parenthesize(exp) ⇒ Object

Wrap appropriate expressions in matching parens.



1375
1376
1377
1378
1379
1380
1381
1382
 
# File 'lib/ruby2ruby.rb', line 1375

def parenthesize exp
  case context[1]
  when nil, :defn, :defs, :class, :sclass, :if, :iter, :resbody, :when, :while then
    exp
  else
    "(#{exp})"
  end
end

#process_alias(exp) ⇒ Object

Processors



97
98
99
100
101
 
# File 'lib/ruby2ruby.rb', line 97

def process_alias exp # :nodoc:
  _, lhs, rhs = exp

  parenthesize "alias #{process lhs} #{process rhs}"
end

#process_and(exp) ⇒ Object

:nodoc:



103
104
105
106
107
 
# File 'lib/ruby2ruby.rb', line 103

def process_and exp # :nodoc:
  _, lhs, rhs = exp

  parenthesize "#{process lhs} and #{process rhs}"
end

#process_arglist(exp) ⇒ Object

custom made node # :nodoc:



109
110
111
112
113
114
115
116
 
# File 'lib/ruby2ruby.rb', line 109

def process_arglist exp # custom made node # :nodoc:
  _, *args = exp

  args.map { |arg|
    code = process arg
    arg.sexp_type == :rescue ? "(#{code})" : code
  }.join ", "
end

#process_args(exp) ⇒ Object

:nodoc:



118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
 
# File 'lib/ruby2ruby.rb', line 118

def process_args exp # :nodoc:
  _, *args = exp

  shadow = []

  args = args.map { |arg|
    case arg
    when Symbol then
      arg
    when Sexp then
      case arg.sexp_type
      when :lasgn then
        process(arg)
      when :masgn then
        process(arg)
      when :kwarg then
        _, k, v = arg
        "#{k}: #{process v}"
      when :shadow then
        shadow << arg.sexp_body
        next
      when :forward_args then
        "..."
      else
        raise "unknown arg type #{arg.first.inspect}"
      end
    when nil then
      ""
    else
      raise "unknown arg type #{arg.inspect}"
    end
  }.compact

  args   = args.join(", ").strip
  shadow = shadow.join(", ").strip
  shadow = "; #{shadow}" unless shadow.empty?

  "(%s%s)" % [args, shadow]
end

#process_array(exp) ⇒ Object

:nodoc:



158
159
160
 
# File 'lib/ruby2ruby.rb', line 158

def process_array exp # :nodoc:
  "[#{process_arglist exp}]"
end

#process_array_pat(exp) ⇒ Object

:nodoc:



631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
 
# File 'lib/ruby2ruby.rb', line 631

def process_array_pat exp # :nodoc:
  _, const, *rest = exp

  const = process const if const

  rest = rest.map { |sexp|
    case sexp
    when Sexp
      process sexp
    else
      sexp
    end
  }

  "%s[%s]" % [const, rest.join(", ")]
end

#process_attrasgn(exp) ⇒ Object

:nodoc:



162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
 
# File 'lib/ruby2ruby.rb', line 162

def process_attrasgn exp # :nodoc:
  _, recv, name, *args = exp

  rhs = args.pop
  args = s(:array, *args)
  receiver = process recv

  case name
  when :[]= then
    args = process args
    "#{receiver}#{args} = #{process rhs}"
  else
    raise "dunno what to do: #{args.inspect}" if args.size != 1 # s(:array)
    name = name.to_s.chomp "="
    if rhs && rhs != s(:arglist) then
      "#{receiver}.#{name} = #{process(rhs)}"
    else
      raise "dunno what to do: #{rhs.inspect}"
    end
  end
end

#process_back_ref(exp) ⇒ Object

:nodoc:



184
185
186
187
188
 
# File 'lib/ruby2ruby.rb', line 184

def process_back_ref exp # :nodoc:
  _, n = exp

  "$#{n}"
end

#process_begin(exp) ⇒ Object

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



191
192
193
194
195
196
197
198
199
200
201
202
203
 
# File 'lib/ruby2ruby.rb', line 191

def process_begin exp # :nodoc:
  _, *rest = exp

  code = rest.map { |sexp|
    src = process sexp
    src = indent src unless src =~ /(^|\n)(rescue|ensure)/ # ensure no level 0 rescues
    src
  }
  code.unshift "begin"
  code.push "end"

  code.join "\n"
end

#process_block(exp) ⇒ Object

:nodoc:



205
206
207
208
209
210
211
212
213
214
215
216
217
 
# File 'lib/ruby2ruby.rb', line 205

def process_block exp # :nodoc:
  _, *body = exp

  result = body.map { |sexp|
    process sexp
  }

  result << "# do nothing\n" if result.empty?
  result = parenthesize result.join "\n"
  result += "\n" unless result.start_with? "("

  result
end

#process_block_pass(exp) ⇒ Object

:nodoc:



219
220
221
222
223
224
225
 
# File 'lib/ruby2ruby.rb', line 219

def process_block_pass exp # :nodoc:
  raise "huh?: #{exp.inspect}" if exp.size > 2

  _, sexp = exp

  "&#{process sexp}"
end

#process_break(exp) ⇒ Object

:nodoc:



227
228
229
230
231
232
233
234
235
236
237
 
# File 'lib/ruby2ruby.rb', line 227

def process_break exp # :nodoc:
  _, arg = exp

  val = process arg

  if val then
    "break #{val}"
  else
    "break"
  end
end

#process_call(exp, safe_call = false) ⇒ Object

:nodoc:



239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
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
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
 
# File 'lib/ruby2ruby.rb', line 239

def process_call(exp, safe_call = false) # :nodoc:
  _, recv, name, *args = exp

  receiver_node_type = recv && recv.sexp_type
  receiver = process recv
  receiver = "(#{receiver})" if ASSIGN_NODES.include? receiver_node_type

  # args = []

  # this allows us to do both old and new sexp forms:
  # exp.push(*exp.pop[1..-1]) if exp.size == 1 && exp.first.first == :arglist

  @calls.push name

  in_context :arglist do
    max = args.size - 1
    args = args.map.with_index { |arg, i|
      arg_type = arg.sexp_type
      is_empty_hash = arg == s(:hash)
      arg = process arg

      next if arg.empty?

      strip_hash = (arg_type == :hash and
                    not BINARY.include? name and
                    not is_empty_hash and
                    (i == max or args[i + 1].sexp_type == :splat))
      wrap_arg = Ruby2Ruby::ASSIGN_NODES.include? arg_type

      arg = arg[2..-3] if strip_hash
      arg = "(#{arg})" if wrap_arg

      arg
    }.compact
  end

  case name
  when *BINARY then
    if safe_call
      "#{receiver}&.#{name}(#{args.join(", ")})"
    elsif args.length > 1
      "#{receiver}.#{name}(#{args.join(", ")})"
    else
      "(#{receiver} #{name} #{args.join(", ")})"
    end
  when :[] then
    receiver ||= "self"
    "#{receiver}[#{args.join(", ")}]"
  when :[]= then
    receiver ||= "self"
    rhs = args.pop
    "#{receiver}[#{args.join(", ")}] = #{rhs}"
  when :"!" then
    "(not #{receiver})"
  when :"-@" then
    "-#{receiver}"
  when :"+@" then
    "+#{receiver}"
  else
    args     = nil                    if args.empty?
    args     = "(#{args.join(", ")})" if args
    receiver = "#{receiver}."         if receiver and not safe_call
    receiver = "#{receiver}&."        if receiver and safe_call

    "#{receiver}#{name}#{args}"
  end
ensure
  @calls.pop
end

#process_case(exp) ⇒ Object

:nodoc:



313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
 
# File 'lib/ruby2ruby.rb', line 313

def process_case exp # :nodoc:
  _, expr, *rest = exp

  result = []

  expr = process expr

  result << if expr then
              "case #{expr}"
            else
              "case"
            end

  result.concat rest.map { |pt|
    if pt and i[when in].include? pt.sexp_type
      "#{process pt}"
    else
      next unless pt
      code = indent process pt
      code = indent("# do nothing") if code =~ /^\s*$/
      "else\n#{code}"
    end
  }

  result << "end"

  result.compact.join "\n"
end

#process_cdecl(exp) ⇒ Object

:nodoc:



342
343
344
345
346
347
348
349
350
351
 
# File 'lib/ruby2ruby.rb', line 342

def process_cdecl exp # :nodoc:
  _, lhs, rhs = exp
  lhs = process lhs if Sexp === lhs
  if rhs then
    rhs = process rhs
    "#{lhs} = #{rhs}"
  else
    lhs.to_s
  end
end

#process_class(exp) ⇒ Object

:nodoc:



359
360
361
 
# File 'lib/ruby2ruby.rb', line 359

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

#process_colon2(exp) ⇒ Object

:nodoc:



363
364
365
366
367
 
# File 'lib/ruby2ruby.rb', line 363

def process_colon2 exp # :nodoc:
  _, lhs, rhs = exp

  "#{process lhs}::#{rhs}"
end

#process_colon3(exp) ⇒ Object

:nodoc:



369
370
371
372
373
 
# File 'lib/ruby2ruby.rb', line 369

def process_colon3 exp # :nodoc:
  _, rhs = exp

  "::#{rhs}"
end

#process_const(exp) ⇒ Object

:nodoc:



375
376
377
378
379
380
381
 
# File 'lib/ruby2ruby.rb', line 375

def process_const exp # :nodoc:
  _, name = exp

  name = process name if Sexp === name

  name.to_s
end

#process_cvar(exp) ⇒ Object

:nodoc:



394
395
396
397
398
 
# File 'lib/ruby2ruby.rb', line 394

def process_cvar exp # :nodoc:
  _, name = exp

  __var name
end

#process_cvasgn(exp) ⇒ Object

:nodoc:



400
401
402
403
404
 
# File 'lib/ruby2ruby.rb', line 400

def process_cvasgn exp # :nodoc:
  _, lhs, rhs = exp

  "#{lhs} = #{process rhs}"
end

#process_cvdecl(exp) ⇒ Object

:nodoc:



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

def process_cvdecl exp # :nodoc:
  _, lhs, rhs = exp

  "#{lhs} = #{process rhs}"
end

#process_defined(exp) ⇒ Object

:nodoc:



412
413
414
415
416
417
418
419
 
# File 'lib/ruby2ruby.rb', line 412

def process_defined exp # :nodoc:
  _, rhs = exp
  if context[1] == :if then # HACK?
    "defined?(#{process rhs})"
  else
    "defined? #{process rhs}"
  end
end

#process_defn(exp) ⇒ Object

:nodoc:



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
446
447
448
449
450
451
452
453
454
455
456
457
 
# File 'lib/ruby2ruby.rb', line 421

def process_defn(exp) # :nodoc:
  _, name, args, *body = exp

  comm = comments exp
  args = process args
  args = "" if args == "()"

  body = s() if body == s(s(:nil)) # empty it out of a default nil expression

  # s(:defn, name, args, ivar|iasgn)
  case exp
  when s{ q(:defn, atom, t(:args), q(:ivar, atom)) } then # TODO: atom -> _
    _, ivar = body.first
    ivar = ivar.to_s[1..-1] # remove leading @
    reader = name.to_s
    return "attr_reader #{name.inspect}" if reader == ivar
  when s{ q(:defn, atom, t(:args), q(:iasgn, atom, q(:lvar, atom))) } then
    _, ivar, _val = body.first
    ivar = ivar.to_s[1..-1] # remove leading @
    reader = name.to_s.chomp "="
    return "attr_writer :#{reader}" if reader == ivar
  end

  body = body.map { |ssexp|
    process ssexp
  }

  simple = body.size <= 1

  body << "# do nothing" if body.empty?
  body = body.join("\n")
  body = body.lines.to_a[1..-2].join("\n") if
    simple && body =~ /^\Abegin/ && body =~ /^end\z/
  body = indent(body) unless simple && body =~ /(^|\n)rescue/

  "#{comm}def #{name}#{args}\n#{body}\nend".gsub(/\n\s*\n+/, "\n")
end

#process_defs(exp) ⇒ Object

:nodoc:



459
460
461
462
463
464
465
466
467
468
469
 
# File 'lib/ruby2ruby.rb', line 459

def process_defs exp # :nodoc:
  _, lhs, name, args, *body = exp
  var = [:self, :cvar, :dvar, :ivar, :gvar, :lvar].include? lhs.sexp_type

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

  name = "#{lhs}.#{name}"

  process_defn s(:defn, name, args, *body)
end

#process_dot2(exp) ⇒ Object

:nodoc:



471
472
473
474
475
 
# File 'lib/ruby2ruby.rb', line 471

def process_dot2(exp) # :nodoc:
  _, lhs, rhs = exp

  "(#{process lhs}..#{process rhs})"
end

#process_dot3(exp) ⇒ Object

:nodoc:



477
478
479
480
481
 
# File 'lib/ruby2ruby.rb', line 477

def process_dot3(exp) # :nodoc:
  _, lhs, rhs = exp

  "(#{process lhs}...#{process rhs})"
end

#process_dregx(exp) ⇒ Object

:nodoc:



483
484
485
486
487
488
489
 
# File 'lib/ruby2ruby.rb', line 483

def process_dregx exp # :nodoc:
  _, str, *rest = exp

  options = re_opt rest.pop if Integer === rest.last

  "/" + util_dthing(:dregx, s(:dregx, str, *rest)) << "/#{options}"
end

#process_dregx_once(exp) ⇒ Object

:nodoc:



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

def process_dregx_once(exp) # :nodoc:
  process_dregx(exp) + "o"
end

#process_dstr(exp) ⇒ Object

:nodoc:



495
496
497
 
# File 'lib/ruby2ruby.rb', line 495

def process_dstr(exp) # :nodoc:
  "\"#{util_dthing(:dstr, exp)}\""
end

#process_dsym(exp) ⇒ Object

:nodoc:



499
500
501
 
# File 'lib/ruby2ruby.rb', line 499

def process_dsym(exp) # :nodoc:
  ":\"#{util_dthing(:dsym, exp)}\""
end

#process_dxstr(exp) ⇒ Object

:nodoc:



503
504
505
 
# File 'lib/ruby2ruby.rb', line 503

def process_dxstr(exp) # :nodoc:
  "`#{util_dthing(:dxstr, exp)}`"
end

#process_ensure(exp) ⇒ Object

:nodoc:



507
508
509
510
511
512
513
514
515
516
517
518
519
 
# File 'lib/ruby2ruby.rb', line 507

def process_ensure(exp) # :nodoc:
  _, body, ens = exp

  body = process body
  ens  = nil if ens == s(:nil)
  ens  = process(ens) || "# do nothing"
  ens = "begin\n#{ens}\nend\n" if ens =~ /(^|\n)rescue/

  body = body.sub(/\n\s*end\z/, "")
  body = indent(body) unless body =~ /(^|\n)rescue/

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

#process_evstr(exp) ⇒ Object

:nodoc:



521
522
523
524
525
 
# File 'lib/ruby2ruby.rb', line 521

def process_evstr exp # :nodoc:
  _, x = exp

  x ? process(x) : ""
end

#process_false(exp) ⇒ Object

:nodoc:



527
528
529
 
# File 'lib/ruby2ruby.rb', line 527

def process_false exp # :nodoc:
  "false"
end

#process_find_pat(exp) ⇒ Object

:nodoc:



620
621
622
623
624
625
626
627
628
629
 
# File 'lib/ruby2ruby.rb', line 620

def process_find_pat exp # :nodoc:
  _, a, b, *c, d = exp

    a = process a               # might be nil
    b = process b if Sexp === b
    c = c.map { |sexp| process sexp }.join(", ")
    d = process d if Sexp === d

    "%s[%s, %s, %s]" % [a, b, c, d]
end

#process_flip2(exp) ⇒ Object

:nodoc:



531
532
533
534
535
 
# File 'lib/ruby2ruby.rb', line 531

def process_flip2 exp # :nodoc:
  _, lhs, rhs = exp

  "#{process lhs}..#{process rhs}"
end

#process_flip3(exp) ⇒ Object

:nodoc:



537
538
539
540
541
 
# File 'lib/ruby2ruby.rb', line 537

def process_flip3 exp # :nodoc:
  _, lhs, rhs = exp

  "#{process lhs}...#{process rhs}"
end

#process_for(exp) ⇒ Object

:nodoc:



543
544
545
546
547
548
549
550
551
552
553
554
555
 
# File 'lib/ruby2ruby.rb', line 543

def process_for exp # :nodoc:
  _, recv, iter, body = exp

  recv = process recv
  iter = process iter
  body = process(body) || "# do nothing"

  result = ["for #{iter} in #{recv} do"]
  result << indent(body)
  result << "end"

  result.join "\n"
end

#process_forward_args(exp) ⇒ Object 



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

def process_forward_args exp
  "..."
end

#process_gasgn(exp) ⇒ Object

:nodoc:



561
562
563
 
# File 'lib/ruby2ruby.rb', line 561

def process_gasgn exp # :nodoc:
  process_iasgn exp
end

#process_gvar(exp) ⇒ Object

:nodoc:



565
566
567
568
569
 
# File 'lib/ruby2ruby.rb', line 565

def process_gvar exp # :nodoc:
  _, name = exp

  __var name
end

#process_hash(exp) ⇒ Object

:nodoc:



571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
 
# File 'lib/ruby2ruby.rb', line 571

def process_hash(exp) # :nodoc:
  _, *pairs = exp

  result = pairs.each_slice(2).map { |k, v|
    if k.sexp_type == :kwsplat then
      "%s" % process(k)
    elsif v.nil?
      # Shorthand hash syntax
      unless k.sexp_type == :lit and k.value.is_a? Symbol
        raise "Expected symbol for hash key, but got #{k.inspect}"
      end

      "#{k.value}:"
    else
      t = v.sexp_type

      lhs = process k
      rhs = process v
      rhs = "(#{rhs})" unless HASH_VAL_NO_PAREN.include? t

      "%s => %s" % [lhs, rhs]
    end
  }

  result.empty? ? "{}" : "{ #{result.join(", ")} }"
end

#process_hash_pat(exp) ⇒ Object

:nodoc:



654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
 
# File 'lib/ruby2ruby.rb', line 654

def process_hash_pat exp # :nodoc:
  _, const, *rest = exp

  if const then
    const = process const
    kwrest = process rest.pop if rest.last && rest.last.sexp_type == :kwrest

    rest = rest.each_slice(2).map { |k, v|
      k = process(k).delete_prefix ":"
      v = process v

      "#{k}: #{v}".strip
    }

    rest << kwrest if kwrest

    rest.empty? ? "%s[]" % const : "%s[%s]" % [const, rest.join(", ")]
  else
    kwrest = process rest.pop if rest.last && rest.last.sexp_type == :kwrest

    rest = rest.each_slice(2).map { |k, v|
      k = process(k).delete_prefix ":"
      v = process v

      "#{k}: #{v}".strip
    }

    rest << kwrest if kwrest

    rest.empty? ? "{}" : "{ %s }" % [rest.join(", ")]
  end
end

#process_iasgn(exp) ⇒ Object

:nodoc:



598
599
600
601
602
603
604
605
606
 
# File 'lib/ruby2ruby.rb', line 598

def process_iasgn(exp) # :nodoc:
  _, lhs, rhs = exp

  if rhs then
    "#{lhs} = #{process rhs}"
  else # part of an masgn
    lhs.to_s
  end
end

#process_if(exp) ⇒ Object

:nodoc:



691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
 
# File 'lib/ruby2ruby.rb', line 691

def process_if(exp) # :nodoc:
  _, c, t, f = exp

  expand = Ruby2Ruby::ASSIGN_NODES.include? c.sexp_type
  c = process c
  t = process t
  f = process f

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

    r.join
  elsif f
    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"
  else
    # empty if statement, just do it in case of side effects from condition
    "if #{c} then\n#{indent "# do nothing"}\nend"
  end
end

#process_in(exp) ⇒ Object

:nodoc:



608
609
610
611
612
613
614
615
616
617
618
 
# File 'lib/ruby2ruby.rb', line 608

def process_in exp # :nodoc:
  _, lhs, *rhs = exp

  cond = process lhs
  body = rhs.compact.map { |sexp| indent process sexp }

  body << indent("# do nothing") if body.empty?
  body = body.join "\n"

  "in #{cond} then\n#{body.chomp}"
end

#process_iter(exp) ⇒ Object

:nodoc:



736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
 
# File 'lib/ruby2ruby.rb', line 736

def process_iter(exp) # :nodoc:
  _, iter, args, body = exp

  is_lambda = iter.sexp_type == :lambda

  iter = process iter
  body = process body if body

  args = case
         when args == 0 then
           ""
         when is_lambda then
           " (#{process(args)[1..-2]})"
         else
           " |#{process(args)[1..-2]}|"
         end

  b, e = if MUST_BE_CURLY.include? iter then
           %w[ { } ]
         else
           %w[ do end ]
         end

  iter = iter.sub(/\(\)$/, "")

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

  result = []

  if is_lambda then
    result << iter
    result << args
    result << " #{b}"
  else
    result << "#{iter} #{b}"
    result << args
  end

  result << "\n"
  if body then
    result << indent(body.strip)
    result << "\n"
  end
  result << e
  result.join
end

#process_ivar(exp) ⇒ Object

:nodoc:



800
801
802
803
804
 
# File 'lib/ruby2ruby.rb', line 800

def process_ivar(exp) # :nodoc:
  _, name = exp

  __var name
end

#process_kwrest(exp) ⇒ Object

:nodoc:



648
649
650
651
652
 
# File 'lib/ruby2ruby.rb', line 648

def process_kwrest exp # :nodoc:
  _, name = exp

  name.to_s
end

#process_kwsplat(exp) ⇒ Object 



806
807
808
809
 
# File 'lib/ruby2ruby.rb', line 806

def process_kwsplat(exp)
  _, kw = exp
  "**#{process kw}"
end

#process_lambda(exp) ⇒ Object

:nodoc:



730
731
732
 
# File 'lib/ruby2ruby.rb', line 730

def process_lambda exp # :nodoc:
  "->"
end

#process_lasgn(exp) ⇒ Object

:nodoc:



811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
 
# File 'lib/ruby2ruby.rb', line 811

def process_lasgn(exp) # :nodoc:
  _, name, value = exp

  value = process value

  if value then
    "%s %s %s" % case context[1]
                 when /_pat$/ then
                   [value, "=>", name]
                 else
                   [name, "=", value]
                 end
  else
    "%s" % [name]
  end
end

#process_lit(exp) ⇒ Object

:nodoc:



828
829
830
831
832
833
834
835
836
 
# File 'lib/ruby2ruby.rb', line 828

def process_lit exp # :nodoc:
  _, obj = exp
  case obj
  when Range then
    "(#{obj.inspect})"
  else
    obj.inspect
  end
end

#process_lvar(exp) ⇒ Object

:nodoc:



838
839
840
841
842
 
# File 'lib/ruby2ruby.rb', line 838

def process_lvar(exp) # :nodoc:
  _, name = exp

  __var name
end

#process_masgn(exp) ⇒ Object

:nodoc:



844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
 
# File 'lib/ruby2ruby.rb', line 844

def process_masgn(exp) # :nodoc:
  # s(:masgn, s(:array, s(:lasgn, :var), ...), s(:to_ary, <val>, ...))
  # s(:iter, <call>, s(:args, s(:masgn, :a, :b)), <body>)
  parenthesize = true

  result = exp.sexp_body.map { |sexp|
    case sexp
    when Sexp then
      if sexp.sexp_type == :array then
        parenthesize = context.grep(:masgn).size > 1
        res = process sexp

        res[1..-2]
      else
        process sexp
      end
    when Symbol then
      sexp
    else
      raise "unknown masgn: #{sexp.inspect}"
    end
  }
  parenthesize ? "(#{result.join ", "})" : result.join(" = ")
end

#process_match(exp) ⇒ Object

:nodoc:



869
870
871
872
873
 
# File 'lib/ruby2ruby.rb', line 869

def process_match exp # :nodoc:
  _, rhs = exp

  "#{process rhs}"
end

#process_match2(exp) ⇒ Object

:nodoc:



875
876
877
878
879
880
881
882
883
 
# File 'lib/ruby2ruby.rb', line 875

def process_match2 exp # :nodoc:
  # s(:match2, s(:lit, /x/), s(:str, "blah"))
  _, lhs, rhs = exp

  lhs = process lhs
  rhs = process rhs

  "#{lhs} =~ #{rhs}"
end

#process_match3(exp) ⇒ Object

:nodoc:



885
886
887
888
889
890
891
892
893
894
895
896
897
 
# File 'lib/ruby2ruby.rb', line 885

def process_match3 exp # :nodoc:
  _, rhs, lhs = exp # yes, backwards

  left_type = lhs.sexp_type
  lhs = process lhs
  rhs = process rhs

  if ASSIGN_NODES.include? left_type then
    "(#{lhs}) =~ #{rhs}"
  else
    "#{lhs} =~ #{rhs}"
  end
end

#process_module(exp) ⇒ Object

:nodoc:



899
900
901
 
# File 'lib/ruby2ruby.rb', line 899

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

#process_next(exp) ⇒ Object

:nodoc:



903
904
905
906
907
908
909
910
911
912
 
# File 'lib/ruby2ruby.rb', line 903

def process_next(exp) # :nodoc:
  _, rhs = exp

  val = rhs && process(rhs) # maybe push down into if and test rhs?
  if val then
    "next #{val}"
  else
    "next"
  end
end

#process_nil(exp) ⇒ Object

:nodoc:



914
915
916
 
# File 'lib/ruby2ruby.rb', line 914

def process_nil(exp) # :nodoc:
  "nil"
end

#process_not(exp) ⇒ Object

:nodoc:



918
919
920
921
 
# File 'lib/ruby2ruby.rb', line 918

def process_not(exp) # :nodoc:
  _, sexp = exp
  "(not #{process sexp})"
end

#process_nth_ref(exp) ⇒ Object

:nodoc:



923
924
925
926
 
# File 'lib/ruby2ruby.rb', line 923

def process_nth_ref(exp) # :nodoc:
  _, n = exp
  "$#{n}"
end

#process_op_asgn(exp) ⇒ Object

:nodoc:



928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
 
# File 'lib/ruby2ruby.rb', line 928

def process_op_asgn exp # :nodoc:
  case exp.length
  when 4
    _, lhs, op, rhs = exp

    lhs = process lhs
    rhs = process rhs

    "#{lhs} #{op}= #{rhs}"
  when 5
    _, lhs, rhs, index, op = exp

    lhs = process lhs
    rhs = process rhs

    "#{lhs}.#{index} #{op}= #{rhs}"
  else
    raise ArgumentError, "Don't know how to process this length: %p" % [exp]
  end
end

#process_op_asgn1(exp) ⇒ Object

:nodoc:



949
950
951
952
953
954
955
956
957
958
 
# File 'lib/ruby2ruby.rb', line 949

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

  lhs   = process lhs
  index = process index
  rhs   = process rhs

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

#process_op_asgn2(exp) ⇒ Object

:nodoc:



960
961
962
963
964
965
966
967
968
969
 
# File 'lib/ruby2ruby.rb', line 960

def process_op_asgn2 exp # :nodoc:
  # [[:lvar, :c], :var=, :"||", [:lit, 20]]
  _, lhs, index, msg, rhs = exp

  lhs   = process lhs
  index = index.to_s[0..-2]
  rhs   = process rhs

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

#process_op_asgn_and(exp) ⇒ Object

:nodoc:



971
972
973
974
975
976
 
# File 'lib/ruby2ruby.rb', line 971

def process_op_asgn_and(exp) # :nodoc:
  # a &&= 1
  # [[:lvar, :a], [:lasgn, :a, [:lit, 1]]]
  _, _lhs, rhs = exp
  process(rhs).sub(/\=/, "&&=")
end

#process_op_asgn_or(exp) ⇒ Object

:nodoc:



978
979
980
981
982
983
 
# File 'lib/ruby2ruby.rb', line 978

def process_op_asgn_or(exp) # :nodoc:
  # a ||= 1
  # [[:lvar, :a], [:lasgn, :a, [:lit, 1]]]
  _, _lhs, rhs = exp
  process(rhs).sub(/\=/, "||=")
end

#process_or(exp) ⇒ Object

:nodoc:



985
986
987
988
989
990
991
992
993
994
995
996
997
 
# File 'lib/ruby2ruby.rb', line 985

def process_or(exp) # :nodoc:
  _, lhs, rhs = exp

  lhs = process lhs
  rhs = process rhs

  case context[1]
  when :in then
    "(#{lhs} | #{rhs})"
  else
    "(#{lhs} or #{rhs})"
  end
end

#process_postexe(exp) ⇒ Object

:nodoc:



999
1000
1001
 
# File 'lib/ruby2ruby.rb', line 999

def process_postexe(exp) # :nodoc:
  "END"
end

#process_preexe(exp) ⇒ Object

:nodoc:



687
688
689
 
# File 'lib/ruby2ruby.rb', line 687

def process_preexe exp # :nodoc:
  "BEGIN"
end

#process_redo(exp) ⇒ Object

:nodoc:



1003
1004
1005
 
# File 'lib/ruby2ruby.rb', line 1003

def process_redo(exp) # :nodoc:
  "redo"
end

#process_resbody(exp) ⇒ Object

:nodoc:



1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
 
# File 'lib/ruby2ruby.rb', line 1007

def process_resbody exp # :nodoc:
  # s(:resbody, s(:array), s(:return, s(:str, "a")))
  _, args, *body = exp

  body = body.compact.map { |sexp|
    process sexp
  }

  body << "# do nothing" if body.empty?

  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.join("\n")}"
end

#process_rescue(exp) ⇒ Object

:nodoc:



1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
 
# File 'lib/ruby2ruby.rb', line 1026

def process_rescue exp # :nodoc:
  _, *rest = exp

  body = process rest.shift unless rest.first.sexp_type == :resbody
  els  = process rest.pop   unless rest.last && rest.last.sexp_type == :resbody

  body ||= "# do nothing"

  # TODO: I don't like this using method_missing, but I need to ensure tests
  simple = rest.size == 1 && rest.first.size <= 3 &&
    !rest.first.block &&
    !rest.first.return

  resbodies = rest.map { |resbody|
    _, rb_args, rb_body, *rb_rest = resbody
    simple &&= rb_args == s(:array)
    simple &&= rb_rest.empty? && rb_body && rb_body.node_type != :block
    process resbody
  }

  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

:nodoc:



1056
1057
1058
 
# File 'lib/ruby2ruby.rb', line 1056

def process_retry(exp) # :nodoc:
  "retry"
end

#process_return(exp) ⇒ Object

:nodoc:



1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
 
# File 'lib/ruby2ruby.rb', line 1060

def process_return exp # :nodoc:
  _, rhs = exp

  unless rhs then
    "return"
  else
    rhs_type = rhs.sexp_type
    rhs = process rhs
    rhs = "(#{rhs})" if ASSIGN_NODES.include? rhs_type
    "return #{rhs}"
  end
end

#process_safe_attrasgn(exp) ⇒ Object

:nodoc:



1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
 
# File 'lib/ruby2ruby.rb', line 1073

def process_safe_attrasgn exp # :nodoc:
  _, receiver, name, *rest = exp

  receiver = process receiver
  rhs  = rest.pop
  args = rest.pop # should be nil

  raise "dunno what to do: #{args.inspect}" if args

  name = name.to_s.sub(/=$/, "")

  if rhs && rhs != s(:arglist) then
    "#{receiver}&.#{name} = #{process rhs}"
  else
    raise "dunno what to do: #{rhs.inspect}"
  end
end

#process_safe_call(exp) ⇒ Object

:nodoc:



309
310
311
 
# File 'lib/ruby2ruby.rb', line 309

def process_safe_call exp # :nodoc:
  process_call exp, :safe
end

#process_safe_op_asgn(exp) ⇒ Object

:nodoc:



1091
1092
1093
1094
1095
1096
1097
1098
1099
 
# File 'lib/ruby2ruby.rb', line 1091

def process_safe_op_asgn exp # :nodoc:
  # [[:lvar, :x], [:call, nil, :z, [:lit, 1]], :y, :"||"]
  _, lhs, rhs, index, op = exp

  lhs = process lhs
  rhs = process rhs

  "#{lhs}&.#{index} #{op}= #{rhs}"
end

#process_safe_op_asgn2(exp) ⇒ Object

:nodoc:



1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
 
# File 'lib/ruby2ruby.rb', line 1101

def process_safe_op_asgn2(exp) # :nodoc:
  # [[:lvar, :c], :var=, :"||", [:lit, 20]]

  _, lhs, index, msg, rhs = exp

  lhs   = process lhs
  index = index.to_s[0..-2]
  rhs   = process rhs

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

#process_sclass(exp) ⇒ Object

:nodoc:



1113
1114
1115
1116
1117
1118
1119
1120
 
# File 'lib/ruby2ruby.rb', line 1113

def process_sclass(exp) # :nodoc:
  _, recv, *block = exp

  recv = process recv
  block = indent process_block s(:block, *block)

  "class << #{recv}\n#{block}\nend"
end

#process_self(exp) ⇒ Object

:nodoc:



1122
1123
1124
 
# File 'lib/ruby2ruby.rb', line 1122

def process_self(exp) # :nodoc:
  "self"
end

#process_splat(exp) ⇒ Object

:nodoc:



1126
1127
1128
1129
1130
1131
1132
1133
 
# File 'lib/ruby2ruby.rb', line 1126

def process_splat(exp) # :nodoc:
  _, arg = exp
  if arg.nil? then
    "*"
  else
    "*#{process arg}"
  end
end

#process_str(exp) ⇒ Object

:nodoc:



1135
1136
1137
1138
 
# File 'lib/ruby2ruby.rb', line 1135

def process_str(exp) # :nodoc:
  _, s = exp
  s.dump
end

#process_super(exp) ⇒ Object

:nodoc:



1140
1141
1142
1143
1144
1145
1146
1147
1148
 
# File 'lib/ruby2ruby.rb', line 1140

def process_super(exp) # :nodoc:
  _, *args = exp

  args = args.map { |arg|
    process arg
  }

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

#process_svalue(exp) ⇒ Object

:nodoc:



1150
1151
1152
1153
1154
1155
1156
 
# File 'lib/ruby2ruby.rb', line 1150

def process_svalue(exp) # :nodoc:
  _, *args = exp

  args.map { |arg|
    process arg
  }.join ", "
end

#process_to_ary(exp) ⇒ Object

:nodoc:



1158
1159
1160
1161
1162
 
# File 'lib/ruby2ruby.rb', line 1158

def process_to_ary exp # :nodoc:
  _, sexp = exp

  process sexp
end

#process_true(exp) ⇒ Object

:nodoc:



1164
1165
1166
 
# File 'lib/ruby2ruby.rb', line 1164

def process_true(exp) # :nodoc:
  "true"
end

#process_undef(exp) ⇒ Object

:nodoc:



1168
1169
1170
1171
1172
 
# File 'lib/ruby2ruby.rb', line 1168

def process_undef(exp) # :nodoc:
  _, name = exp

  "undef #{process name}"
end

#process_until(exp) ⇒ Object

:nodoc:



1174
1175
1176
 
# File 'lib/ruby2ruby.rb', line 1174

def process_until(exp) # :nodoc:
  cond_loop(exp, "until")
end

#process_valias(exp) ⇒ Object

:nodoc:



1178
1179
1180
1181
1182
 
# File 'lib/ruby2ruby.rb', line 1178

def process_valias exp # :nodoc:
  _, lhs, rhs = exp

  "alias #{lhs} #{rhs}"
end

#process_when(exp) ⇒ Object

:nodoc:



1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
 
# File 'lib/ruby2ruby.rb', line 1184

def process_when exp # :nodoc:
  _, lhs, *rhs = exp

  cond = process(lhs)[1..-2]

  rhs = rhs.compact.map { |sexp|
    indent process sexp
  }

  rhs << indent("# do nothing") if rhs.empty?
  rhs = rhs.join "\n"

  "when #{cond} then\n#{rhs.chomp}"
end

#process_while(exp) ⇒ Object

:nodoc:



1199
1200
1201
 
# File 'lib/ruby2ruby.rb', line 1199

def process_while(exp) # :nodoc:
  cond_loop exp, "while"
end

#process_xstr(exp) ⇒ Object

:nodoc:



1203
1204
1205
 
# File 'lib/ruby2ruby.rb', line 1203

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

#process_yield(exp) ⇒ Object

:nodoc:



1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
 
# File 'lib/ruby2ruby.rb', line 1207

def process_yield(exp) # :nodoc:
  _, *args = exp

  args = args.map { |arg|
    process arg
  }

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

#process_zsuper(exp) ⇒ Object

:nodoc:



1221
1222
1223
 
# File 'lib/ruby2ruby.rb', line 1221

def process_zsuper(exp) # :nodoc:
  "super"
end

#re_opt(options) ⇒ Object

Return the appropriate regexp flags for a given numeric code.



1387
1388
1389
1390
1391
 
# File 'lib/ruby2ruby.rb', line 1387

def re_opt options
  bits = (0..8).map { |n| options[n] * 2**n }
  bits.delete 0
  bits.map { |n| Regexp::CODES[n] }.join
end

#rewrite_attrasgn(exp) ⇒ Object

Rewriters:



1228
1229
1230
1231
1232
1233
1234
1235
1236
 
# File 'lib/ruby2ruby.rb', line 1228

def rewrite_attrasgn exp # :nodoc:
  if context.first(2) == [:array, :masgn] then
    _, recv, msg, *args = exp

    exp = s(:call, recv, msg.to_s.chomp("=").to_sym, *args)
  end

  exp
end

#rewrite_call(exp) ⇒ Object

:nodoc:



1238
1239
1240
1241
1242
1243
1244
 
# File 'lib/ruby2ruby.rb', line 1238

def rewrite_call exp # :nodoc:
  _, recv, msg, *args = exp

  exp = s(:not, recv) if msg == :! && args.empty?

  exp
end

#rewrite_ensure(exp) ⇒ Object

:nodoc:



1246
1247
1248
1249
 
# File 'lib/ruby2ruby.rb', line 1246

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

#rewrite_if(exp) ⇒ Object

:nodoc:



1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
 
# File 'lib/ruby2ruby.rb', line 1251

def rewrite_if exp # :nodoc:
  _, c, t, f = exp

  if c.sexp_type == :not then
    _, nc = c
    exp = s(:if, nc, f, t)
  end

  exp
end

#rewrite_resbody(exp) ⇒ Object

:nodoc:



1262
1263
1264
1265
1266
1267
1268
 
# File 'lib/ruby2ruby.rb', line 1262

def rewrite_resbody exp # :nodoc:
  _, args, *_rest = exp
  raise "no exception list in #{exp.inspect}" unless exp.size > 2 && args
  raise args.inspect if args.sexp_type != :array
  # for now, do nothing, just check and freak if we see an errant structure
  exp
end

#rewrite_rescue(exp) ⇒ Object

:nodoc:



1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
 
# File 'lib/ruby2ruby.rb', line 1270

def rewrite_rescue exp # :nodoc:
  complex = false
  complex ||= exp.size > 3
  complex ||= exp.resbody.block
  complex ||= exp.resbody.size > 3
  resbodies = exp.find_nodes(:resbody)
  complex ||= resbodies.any? { |n| n[1] != s(:array) }
  complex ||= resbodies.any? { |n| n.last.nil? }
  complex ||= resbodies.any? { |(_, _, body)| body and body.node_type == :block }

  handled = context.first == :ensure

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

  exp
end

#rewrite_svalue(exp) ⇒ Object

:nodoc:



1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
 
# File 'lib/ruby2ruby.rb', line 1287

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

#rewrite_until(exp) ⇒ Object

:nodoc:



1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
 
# File 'lib/ruby2ruby.rb', line 1298

def rewrite_until exp # :nodoc:
  _, c, *body = exp

  if c.sexp_type == :not then
    _, nc = c
    exp = s(:while, nc, *body)
  end

  exp
end

#rewrite_while(exp) ⇒ Object

:nodoc:



1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
 
# File 'lib/ruby2ruby.rb', line 1309

def rewrite_while exp # :nodoc:
  _, c, *body = exp

  if c.sexp_type == :not then
    _, nc = c
    exp = s(:until, nc, *body)
  end

  exp
end

#splat(sym) ⇒ Object

Return a splatted symbol for sym.



1396
1397
1398
 
# File 'lib/ruby2ruby.rb', line 1396

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

#util_dthing(type, exp) ⇒ Object

Utility method to generate something interpolated.



1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
 
# File 'lib/ruby2ruby.rb', line 1403

def util_dthing(type, exp)
  _, str, *rest = exp

  # first item in sexp is a string literal
  str = dthing_escape(type, str)

  rest = rest.map { |pt|
    case pt.sexp_type
    when :str then
      dthing_escape(type, pt.last)
    when :evstr then
      '#{%s}' % [process(pt)]
    else
      raise "unknown type: #{pt.inspect}"
    end
  }

  [str, rest].join
end

#util_module_or_class(exp, is_class = false) ⇒ Object

Utility method to generate ether a module or class.



1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
 
# File 'lib/ruby2ruby.rb', line 1426

def util_module_or_class exp, is_class = false
  result = []

  _, name, *body = exp
  superk = body.shift if is_class

  name = process name if Sexp === name

  result << name

  if superk then
    superk = process superk
    result << " < #{superk}" if superk
  end

  result << "\n"

  body = body.map { |sexp|
    process(sexp).chomp
  }

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

  result << body
  result << "end"

  result.join
end