Class: Steep::Source

Inherits:
Object show all
Extended by:
ModuleHelper, NodeHelper
Defined in:
lib/steep/source.rb,
lib/steep/source/ignore_ranges.rb

Defined Under Namespace

Classes: Builder, IgnoreRanges

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from NodeHelper

clone_node, deconstruct_case_node, deconstruct_case_node!, deconstruct_if_node, deconstruct_if_node!, deconstruct_resbody_node, deconstruct_resbody_node!, deconstruct_rescue_node, deconstruct_rescue_node!, deconstruct_send_node, deconstruct_send_node!, deconstruct_sendish_and_block_nodes, deconstruct_when_node, deconstruct_when_node!, deconstruct_whileish_node, deconstruct_whileish_node!, each_child_node, each_descendant_node, private_send?, test_case_node, test_if_node, test_resbody_node, test_rescue_node, test_send_node, test_when_node, test_whileish_node, value_node?

Methods included from ModuleHelper

module_name_from_node, namespace_from_node

Constructor Details

#initialize(buffer:, path:, node:, mapping:, comments:, ignores:) ⇒ Source

Returns a new instance of Source.



13
14
15
16
17
18
19
20
 
# File 'lib/steep/source.rb', line 13

def initialize(buffer:, path:, node:, mapping:, comments:, ignores:)
  @buffer = buffer
  @path = path
  @node = node
  @mapping = mapping
  @comments = comments
  @ignores = ignores
end

Instance Attribute Details

#buffer ⇒ Object (readonly)

Returns the value of attribute buffer.



3
4
5
 
# File 'lib/steep/source.rb', line 3

def buffer
  @buffer
end

#comments ⇒ Object (readonly)

Returns the value of attribute comments.



7
8
9
 
# File 'lib/steep/source.rb', line 7

def comments
  @comments
end

#ignores ⇒ Object (readonly)

Returns the value of attribute ignores.



8
9
10
 
# File 'lib/steep/source.rb', line 8

def ignores
  @ignores
end

#mapping ⇒ Object (readonly)

Returns the value of attribute mapping.



6
7
8
 
# File 'lib/steep/source.rb', line 6

def mapping
  @mapping
end

#node ⇒ Object (readonly)

Returns the value of attribute node.



5
6
7
 
# File 'lib/steep/source.rb', line 5

def node
  @node
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



4
5
6
 
# File 'lib/steep/source.rb', line 4

def path
  @path
end

Class Method Details

.adjust_location(node) ⇒ Object 



672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
 
# File 'lib/steep/source.rb', line 672

def self.adjust_location(node)
  if end_pos = node.location.expression&.end_pos
    if last_pos = each_child_node(node).map {|node| node.location.expression&.end_pos }.compact.max
      if last_pos > end_pos
        props = { location: node.location.with_expression(node.location.expression.with(end_pos: last_pos)) }
      end
    end
  end

  if props
    node.updated(nil, nil, props)
  else
    node
  end
end

.assertion_node(node, type) ⇒ Object 



688
689
690
691
 
# File 'lib/steep/source.rb', line 688

def self.assertion_node(node, type)
  map = Parser::Source::Map.new(node.location.expression.with(end_pos: type.location.end_pos))
  Parser::AST::Node.new(:assertion, [node, type], { location: map })
end

.construct_mapping(node:, annotations:, mapping:, line_range: nil) ⇒ Object 



101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
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
157
158
159
160
161
162
163
164
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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
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
 
# File 'lib/steep/source.rb', line 101

def self.construct_mapping(node:, annotations:, mapping:, line_range: nil)
  case node.type
  when :if
    cond_node, truthy_node, falsy_node, loc = deconstruct_if_node!(node)

    if node.loc.respond_to?(:question)
      # Skip ternary operator

      each_child_node node do |child|
        construct_mapping(node: child, annotations: annotations, mapping: mapping, line_range: nil)
      end
    else
      if_loc = loc #: NodeHelper::condition_loc

      if if_loc.expression.begin_pos == if_loc.keyword.begin_pos
        construct_mapping(node: cond_node,annotations: annotations, mapping: mapping, line_range: nil)

        if truthy_node
          if if_loc.keyword.source == "if" || if_loc.keyword.source == "elsif"
            # if foo
            #   bar      <=
            # end
            then_start = if_loc.begin&.last_line || cond_node.loc.last_line
            then_end = if_loc.else&.line || if_loc.last_line
          else
            # unless foo
            # else
            #   bar      <=
            # end
            if_loc.else or raise
            then_start = if_loc.else.last_line
            then_end = loc.last_line
          end
          construct_mapping(node: truthy_node, annotations: annotations, mapping: mapping, line_range: then_start...then_end)
        end

        if falsy_node
          if if_loc.keyword.source == "if" || if_loc.keyword.source == "elsif"
            # if foo
            # else
            #   bar      <=
            # end
            if_loc.else or raise
            else_start = if_loc.else.last_line
            else_end = if_loc.last_line
          else
            # unless foo
            #   bar      <=
            # end
            else_start = if_loc.begin&.last_line || cond_node.loc.last_line
            else_end = if_loc.else&.line || if_loc.last_line
          end
          construct_mapping(node: falsy_node, annotations: annotations, mapping: mapping, line_range: else_start...else_end)
        end

      else
        # postfix if/unless
        each_child_node(node) do |child|
          construct_mapping(node: child, annotations: annotations, mapping: mapping, line_range: nil)
        end
      end
    end

  when :while, :until
    cond_node, body_node, loc = deconstruct_whileish_node!(node)

    if loc.expression.begin_pos == loc.keyword.begin_pos
      # prefix while
      loc.end or raise
      construct_mapping(node: cond_node, annotations: annotations, mapping: mapping, line_range: nil)

      if body_node
        body_start = cond_node.loc.last_line
        body_end = loc.end.line

        construct_mapping(node: body_node, annotations: annotations, mapping: mapping, line_range: body_start...body_end)
      end
    else
      # postfix while
      each_child_node(node) do |child|
        construct_mapping(node: child, annotations: annotations, mapping: mapping, line_range: nil)
      end
    end

  when :while_post, :until_post
    cond_node, body_node, loc = deconstruct_whileish_node!(node)

    construct_mapping(node: cond_node, annotations: annotations, mapping: mapping, line_range: nil)

    if body_node
      body_start = loc.expression.line
      body_end = loc.keyword.line
      construct_mapping(node: body_node, annotations: annotations, mapping: mapping, line_range: body_start...body_end)
    end

  when :case
    cond_node, when_nodes, else_node, loc = deconstruct_case_node!(node)

    if cond_node
      construct_mapping(node: cond_node, annotations: annotations, mapping: mapping, line_range: nil)
    end

    if else_node
      loc.else or raise
      loc.end or raise

      else_start = loc.else.last_line
      else_end = loc.end.line

      construct_mapping(node: else_node, annotations: annotations, mapping: mapping, line_range: else_start...else_end)
    end

    when_nodes.each do |child|
      if child.type == :when
        construct_mapping(node: child, annotations: annotations, mapping: mapping, line_range: nil)
      end
    end

  when :when
    operands, body, loc = deconstruct_when_node!(node)
    last_cond = operands.last or raise

    operands.each do |child|
      construct_mapping(node: child, annotations: annotations, mapping: mapping, line_range: nil)
    end

    if body
      cond_end = loc.begin&.last_line || last_cond.loc.last_line+1
      body_end = body.loc.last_line
      construct_mapping(node: body, annotations: annotations, mapping: mapping, line_range: cond_end...body_end)
    end

  when :rescue
    body, resbodies, else_node, loc = deconstruct_rescue_node!(node)

    if else_node
      loc.else or raise

      else_start = loc.else.last_line
      else_end = loc.last_line

      construct_mapping(node: else_node, annotations: annotations, mapping: mapping, line_range: else_start...else_end)
    end

    each_child_node(node) do |child|
      construct_mapping(node: child, annotations: annotations, mapping: mapping, line_range: nil)
    end

  else
    each_child_node(node) do |child|
      construct_mapping(node: child, annotations: annotations, mapping: mapping, line_range: nil)
    end
  end

  associated_annotations, other_annotations = annotations.partition do |annot|
    location = node.loc
    annot.line or next

    case node.type
    when :def, :module, :class, :block, :numblock, :ensure, :defs, :resbody
      location = node.loc
      location.line <= annot.line && annot.line < location.last_line
    else
      if line_range
        line_range.begin <= annot.line && annot.line < line_range.end
      end
    end
  end

  associated_annotations.each do |annot|
    mapping[node] ||= []
    mapping.fetch(node) << annot
  end

  annotations.replace(other_annotations)
end

.delete_defs(node, allow_list) ⇒ Object 



422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
 
# File 'lib/steep/source.rb', line 422

def self.delete_defs(node, allow_list)
  case node.type
  when :def
    if allow_list.include?(node)
      node
    else
      node.updated(:nil, [])
    end
  when :defs
    if allow_list.include?(node)
      node
    else
      delete_defs(node.children[0], allow_list)
    end
  else
    map_child_node(node) do |child|
      delete_defs(child, allow_list)
    end
  end
end

.insert_type_node(node, comments) ⇒ Object 



494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
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
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
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
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
 
# File 'lib/steep/source.rb', line 494

def self.insert_type_node(node, comments)
  if node.location.expression
    first_line = node.location.expression.first_line
    last_line = node.location.expression.last_line
    last_comment = comments[last_line]

    if (first_line..last_line).none? {|l| comments.key?(l) }
      return node
    end

    case
    when last_comment.is_a?(AST::Node::TypeAssertion)
      case node.type
      when :lvasgn, :ivasgn, :gvasgn, :cvasgn, :casgn
        # Skip
      when :return, :break, :next
        # Skip
      when :def, :defs
        # Skip
      when :kwargs
        # skip
      when :when
        # skip
      when :pair
        key, value = node.children
        key = insert_type_node(key, comments.except(last_line))
        value = insert_type_node(value, comments)
        node = node.updated(nil, [key, value])
        return adjust_location(node)
      when :masgn
        lhs, rhs = node.children
        node = node.updated(nil, [lhs, insert_type_node(rhs, comments)])
        return adjust_location(node)
      when :begin
        location = node.loc #: Parser::Source::Map & Parser::AST::_Collection
        if location.begin
          # paren
          child_assertions = comments.except(last_line)
          node = map_child_node(node) {|child| insert_type_node(child, child_assertions) }
          node = adjust_location(node)
          return assertion_node(node, last_comment)
        end
      else
        if (receiver, name, * = deconstruct_send_node(node))
          if receiver.nil?
            if name == :attr_reader || name == :attr_writer || name == :attr_accessor
              child_assertions = comments.except(last_line)
              node = map_child_node(node) {|child| insert_type_node(child, child_assertions) }
              return adjust_location(node)
            end
          end
        end
        child_assertions = comments.except(last_line)
        node = map_child_node(node) {|child| insert_type_node(child, child_assertions) }
        node = adjust_location(node)
        return assertion_node(node, last_comment)
      end
    when selector_line = sendish_node?(node)
      if (comment = comments[selector_line]).is_a?(AST::Node::TypeApplication)
        child_assertions = comments.except(selector_line)
        case node.type
        when :block
          send, *children = node.children
          node = node.updated(
            nil,
            [
              map_child_node(send) {|child| insert_type_node(child, child_assertions) },
              *children.map do |child|
                if child
                  insert_type_node(child, child_assertions)
                end
              end
            ]
          )
        when :numblock
          send, size, body = node.children
          node = node.updated(
            nil,
            [
              map_child_node(send) {|child| insert_type_node(child, child_assertions) },
              size,
              insert_type_node(body, child_assertions)
            ]
          )
        else
          node = map_child_node(node) {|child| insert_type_node(child, child_assertions) }
        end
        node = adjust_location(node)
        return type_application_node(node, comment)
      end
    end
  end

  case node.type
  when :class
    class_name, super_class, class_body = node.children
    adjust_location(
      node.updated(
        nil,
        [
          class_name,
          super_class,
          class_body ? insert_type_node(class_body, comments) : nil
        ]
      )
    )
  when :module
    module_name, module_body = node.children
    adjust_location(
      node.updated(
        nil,
        [
          module_name,
          module_body ? insert_type_node(module_body, comments) : nil
        ]
      )
    )
  when :def
    name, args, body = node.children
    assertion_location = args&.location&.expression || (_ = node.location).name
    no_assertion_comments = comments.except(assertion_location.last_line)
    args = insert_type_node(args, no_assertion_comments)
    body = insert_type_node(body, comments) if body
    return adjust_location(node.updated(nil, [name, args, body]))
  when :defs
    object, name, args, body = node.children
    assertion_location = args&.location&.expression || (_ = node.location).name
    no_assertion_comments = comments.except(assertion_location.last_line)
    object = insert_type_node(object, no_assertion_comments)
    args = insert_type_node(args, no_assertion_comments)
    body = insert_type_node(body, comments) if body
    return adjust_location(node.updated(nil, [object, name, args, body]))
  else
    if skip_arg_assertions(node)
      # Data.define, Struct.new, ...??
      if node.location.expression
        first_line = node.location.expression.first_line
        last_line = node.location.expression.last_line

        child_assertions = comments.delete_if {|line, _ | first_line < line && line < last_line }
        node = map_child_node(node) {|child| insert_type_node(child, child_assertions) }

        return adjust_location(node)
      end
    end

    adjust_location(
      map_child_node(node, nil) {|child| insert_type_node(child, comments) }
    )
  end
end

.map_child_node(node, type = nil, skip: nil) ⇒ Object 



278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
 
# File 'lib/steep/source.rb', line 278

def self.map_child_node(node, type = nil, skip: nil)
  children = node.children.map do |child|
    if child.is_a?(Parser::AST::Node)
      if skip
        if skip.member?(child)
          child
        else
          yield child
        end
      else
        yield child
      end
    else
      child
    end
  end

  node.updated(type, children)
end

.new_parser ⇒ Object 



33
34
35
36
37
38
 
# File 'lib/steep/source.rb', line 33

def self.new_parser
  Prism::Translation::Parser33.new(Builder.new).tap do |parser|
    parser.diagnostics.all_errors_are_fatal = true
    parser.diagnostics.ignore_warnings = true
  end
end

.parse(source_code, path:, factory:) ⇒ Object 



40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
 
# File 'lib/steep/source.rb', line 40

def self.parse(source_code, path:, factory:)
  buffer = ::Parser::Source::Buffer.new(path.to_s, 1, source: source_code)
  node, comments = new_parser().parse_with_comments(buffer)

  # @type var annotations: Array[AST::Annotation::t]
  annotations = []
  # @type var type_comments: Hash[Integer, type_comment]
  type_comments = {}

  buffer = RBS::Buffer.new(name: path, content: source_code)
  annotation_parser = AnnotationParser.new(factory: factory)

  comments = comments.sort_by do |comment|
    comment.loc.expression.begin_pos
  end

  comments.each do |comment|
    if comment.inline?
      content = comment.text.delete_prefix('#')
      content.lstrip!
      prefix = comment.text.size - content.size
      content.rstrip!
      suffix = comment.text.size - content.size - prefix

      location = RBS::Location.new(
        buffer: buffer,
        start_pos: comment.location.expression.begin_pos + prefix,
        end_pos: comment.location.expression.end_pos - suffix
      )

      case
      when annotation = annotation_parser.parse(content, location: location)
        annotations << annotation
      when assertion = AST::Node::TypeAssertion.parse(location)
        type_comments[assertion.line] = assertion
      when tapp = AST::Node::TypeApplication.parse(location)
        type_comments[tapp.line] = tapp
      end
    end
  end

  map = {} #: Hash[Parser::AST::Node, Array[AST::Annotation::t]]
  map.compare_by_identity

  if node
    node = insert_type_node(node, type_comments)
    construct_mapping(node: node, annotations: annotations, mapping: map)
  end

  annotations.each do |annot|
    map[node] ||= []
    map.fetch(node) << annot
  end

  ignores = comments.filter_map do |comment|
    AST::Ignore.parse(comment, buffer)
  end

  new(buffer: buffer, path: path, node: node, mapping: map, comments: comments, ignores: ignores)
end

.sendish_node?(node) ⇒ Boolean

Returns:

  • (Boolean) 


646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
 
# File 'lib/steep/source.rb', line 646

def self.sendish_node?(node)
  send_node =
    case node.type
    when :send, :csend
      node
    when :block, :numblock
      send = node.children[0]
      case send.type
      when :send, :csend
        send
      end
    end

  if send_node
    receiver_node, name, _, location = deconstruct_send_node!(send_node)

    if receiver_node
      if location.dot && location.selector
        location.selector.line
      end
    else
      location.selector.line
    end
  end
end

.skip_arg_assertions(node) ⇒ Object 



468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
 
# File 'lib/steep/source.rb', line 468

def self.skip_arg_assertions(node)
  send_node, _ = deconstruct_sendish_and_block_nodes(node)
  return false unless send_node

  if send_node.type == :send
    receiver, method, args = deconstruct_send_node!(send_node)

    return false unless receiver

    if receiver.type == :const
      if type_name = module_name_from_node(receiver.children[0], receiver.children[1])
        if type_name.namespace.empty?
          if type_name.name == :Data && method == :define
            return true
          end
          if type_name.name == :Struct && method == :new
            return true
          end
        end
      end
    end
  end

  false
end

.type_application_node(node, tapp) ⇒ Object 



693
694
695
696
697
698
699
700
701
702
703
 
# File 'lib/steep/source.rb', line 693

def self.type_application_node(node, tapp)
  if node.location.expression.end_pos > tapp.location.end_pos
    map = Parser::Source::Map.new(node.location.expression)
  else
    map = Parser::Source::Map.new(node.location.expression.with(end_pos: tapp.location.end_pos))
  end

  node = Parser::AST::Node.new(:tapp, [node, tapp], { location: map })
  tapp.set_node(node)
  node
end

Instance Method Details

#annotations(block:, factory:, context:) ⇒ Object 



298
299
300
301
302
303
304
305
306
307
308
309
310
 
# File 'lib/steep/source.rb', line 298

def annotations(block:, factory:, context:)
  annotations =
    if block
      mapping.fetch(block, [])
    else
      []
    end #: Array[AST::Annotation::t]
  AST::Annotation::Collection.new(
    annotations: annotations,
    factory: factory,
    context: context
  )
end

#each_annotation(&block) ⇒ Object 



312
313
314
315
316
317
318
319
320
 
# File 'lib/steep/source.rb', line 312

def each_annotation(&block)
  if block_given?
    mapping.each do |node, annots|
      yield [node, annots]
    end
  else
    enum_for :each_annotation
  end
end

#each_block_annotation(node, &block) ⇒ Object 



322
323
324
325
326
327
328
329
330
 
# File 'lib/steep/source.rb', line 322

def each_block_annotation(node, &block)
  if block
    if annots = mapping.fetch(node, nil)
      annots.each(&block)
    end
  else
    enum_for :each_block_annotation, node
  end
end

#each_heredoc_node(node = self.node, parents = [], &block) ⇒ Object 



336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
 
# File 'lib/steep/source.rb', line 336

def each_heredoc_node(node = self.node, parents = [], &block)
  if block
    return unless node

    case node.type
    when :dstr, :str
      if node.location.respond_to?(:heredoc_body)
        yield [[node, *parents], _ = node.location]
      end
    end

    parents.unshift(node)
    Source.each_child_node(node) do |child|
      each_heredoc_node(child, parents, &block)
    end
    parents.shift()
  else
    enum_for :each_heredoc_node, node
  end
end

#find_block_node(nodes) ⇒ Object 



332
333
334
 
# File 'lib/steep/source.rb', line 332

def find_block_node(nodes)
  nodes.find { mapping.key?(_1) }
end

#find_comment(line:, column:) ⇒ Object 



408
409
410
411
412
413
414
415
416
417
418
419
420
 
# File 'lib/steep/source.rb', line 408

def find_comment(line:, column:)
  pos = buffer.loc_to_pos([line, column])

  comment = comments.bsearch do |comment|
    pos <= comment.loc.expression.end_pos
  end

  if comment
    if comment.loc.expression.begin_pos < pos
      comment
    end
  end
end

#find_heredoc_nodes(line, column, position) ⇒ Object 



357
358
359
360
361
362
363
364
365
366
367
368
369
370
 
# File 'lib/steep/source.rb', line 357

def find_heredoc_nodes(line, column, position)
  each_heredoc_node() do |nodes, location|
    node = nodes[0]
    loc = location.heredoc_body #: Parser::Source::Range

    if range = loc.to_range
      if range.begin <= position && position <= range.end
        return nodes
      end
    end
  end

  nil
end

#find_nodes(line:, column:) ⇒ Object 



390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
 
# File 'lib/steep/source.rb', line 390

def find_nodes(line:, column:)
  return [] unless node

  position = buffer.loc_to_pos([line, column])

  if heredoc_nodes = find_heredoc_nodes(line, column, position)
    Source.each_child_node(heredoc_nodes.fetch(0)) do |child|
      if nodes = find_nodes_loc(child, position, heredoc_nodes)
        return nodes
      end
    end

    return heredoc_nodes
  else
    find_nodes_loc(node, position, [])
  end
end

#find_nodes_loc(node, position, parents) ⇒ Object 



372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
 
# File 'lib/steep/source.rb', line 372

def find_nodes_loc(node, position, parents)
  range = node.location.expression&.to_range

  if range
    if range.begin <= position && position <= range.end
      parents.unshift node

      Source.each_child_node(node) do |child|
        if ns = find_nodes_loc(child, position, parents)
          return ns
        end
      end

      parents
    end
  end
end

#without_unrelated_defs(line:, column:) ⇒ Object 



443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
 
# File 'lib/steep/source.rb', line 443

def without_unrelated_defs(line:, column:)
  if node
    nodes = find_nodes(line: line, column: column) || []
    defs = Set[].compare_by_identity.merge(nodes.select {|node| node.type == :def || node.type == :defs })

    node_ = Source.delete_defs(node, defs)

    # @type var mapping: Hash[Parser::AST::Node, Array[AST::Annotation::t]]
    mapping = {}
    mapping.compare_by_identity

    annotations = self.mapping.values.flatten
    Source.construct_mapping(node: node_, annotations: annotations, mapping: mapping)

    annotations.each do |annot|
      mapping[node_] ||= []
      mapping.fetch(node_) << annot
    end

    Source.new(buffer: buffer, path: path, node: node_, mapping: mapping, comments: comments, ignores: ignores)
  else
    self
  end
end