Module: MilkTea::LSP::Server::ServerFormatting

Included in:
MilkTea::LSP::Server
Defined in:
lib/milk_tea/lsp/server/formatting.rb

Instance Method Summary collapse

Instance Method Details

#append_local_children(container, locals, facts, removed_local_names) ⇒ Object

Adds local declaration children to an outline symbol. Destructure locals (let Vec2(x, y) = ...) introduce a spurious flat variable symbol named after the destructure type; that symbol is collected for removal instead of being shown as a typed child.



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/milk_tea/lsp/server/formatting.rb', line 422

def append_local_children(container, locals, facts, removed_local_names)
  return unless locals&.any?

  container[:children] ||= []
  children = container[:children]
  locals.each do |local|
    if local.respond_to?(:destructure_bindings) && local.destructure_bindings
      type_name = local.destructure_type_name
      if type_name
        name = type_name.is_a?(Array) ? type_name.join('.') : type_name.to_s
        removed_local_names << name unless removed_local_names.include?(name)
      end
      next
    end
    next unless local.name

    child = local_decl_symbol(local, facts:)
    next unless child

    children << child unless children.any? { |pc| pc[:name] == child[:name] }
    removed_local_names << local.name
    removed_local_names.concat(descendant_names(child))
  end
end

#child_event_symbol(e) ⇒ Object 



337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 337

def child_event_symbol(e)
  return nil unless e.respond_to?(:name) && e.name && e.line

  parts = ["event[#{e.capacity}]"]
  parts << "(#{type_detail_string(e.payload_type)})" if e.respond_to?(:payload_type) && e.payload_type

  {
    name: e.name, kind: 24,
    detail: parts.join,
    range: { start: { line: e.line - 1, character: 0 }, end: { line: e.line, character: 0 } },
    selectionRange: {
      start: { line: e.line - 1, character: (e.column ? e.column - 1 : 0) },
      end: { line: e.line - 1, character: (e.column ? e.column - 1 + e.name.length : 0) },
    },
  }
end

#child_field_symbol(f) ⇒ Object 



323
324
325
326
327
328
329
330
331
332
333
334
335
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 323

def child_field_symbol(f)
  return nil unless f.respond_to?(:name) && f.name && f.line
  detail = f.respond_to?(:type) ? type_detail_string(f.type) : nil
  {
    name: f.name, kind: 8,
    detail: detail,
    range: { start: { line: f.line - 1, character: 0 }, end: { line: f.line, character: 0 } },
    selectionRange: {
      start: { line: f.line - 1, character: (f.column ? f.column - 1 : 0) },
      end: { line: f.line - 1, character: (f.column ? f.column - 1 + f.name.length : 0) },
    },
  }.compact
end

#child_member_symbol(m, default_line: nil) ⇒ Object 



354
355
356
357
358
359
360
361
362
363
364
365
366
367
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 354

def child_member_symbol(m, default_line: nil)
  line = (m.line) ? m.line : default_line
  return nil unless m.respond_to?(:name) && m.name && line

  col = m.column ? m.column : 1
  {
    name: m.name, kind: 22,
    range: { start: { line: line - 1, character: 0 }, end: { line: line, character: 0 } },
    selectionRange: {
      start: { line: line - 1, character: col - 1 },
      end: { line: line - 1, character: col - 1 + m.name.length },
    },
  }
end

#child_method_symbol(m) ⇒ Object 



598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 598

def child_method_symbol(m)
  return nil unless m.respond_to?(:name) && m.name && m.line

  detail_parts = []
  detail_parts << 'mut' if m.respond_to?(:kind) && m.kind == :editable_function
  detail_parts << 'static' if m.respond_to?(:kind) && m.kind == :static_function
  detail_parts << 'async' if m.respond_to?(:async) && m.async
  detail_parts << "-> #{type_detail_string(m.return_type) || 'void'}"
  {
    name: m.name, kind: 6,
    range: { start: { line: m.line - 1, character: 0 }, end: { line: (m.respond_to?(:end_line) && m.end_line ? m.end_line : m.line), character: 0 } },
    selectionRange: {
      start: { line: m.line - 1, character: (m.column ? m.column - 1 : 0) },
      end: { line: m.line - 1, character: (m.column ? m.column - 1 + m.name.length : 0) },
    },
    detail: detail_parts.empty? ? nil : detail_parts.join(' '),
  }.compact
end

#child_nested_struct_symbol(nested) ⇒ Object 



300
301
302
303
304
305
306
307
308
309
310
311
312
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 300

def child_nested_struct_symbol(nested)
  return nil unless nested.respond_to?(:name) && nested.name && nested.line

  grandchildren = child_symbols_for(nested)
  {
    name: nested.name, kind: 23,
    range: { start: { line: nested.line - 1, character: 0 }, end: { line: nested.line, character: 0 } },
    selectionRange: {
      start: { line: nested.line - 1, character: (nested.column ? nested.column - 1 : 0) },
      end: { line: nested.line - 1, character: (nested.column ? nested.column - 1 + nested.name.length : 0) },
    },
  }.tap { |s| s[:children] = grandchildren if grandchildren&.any? }
end

#child_parent_name(decl) ⇒ Object 



265
266
267
268
269
270
271
272
273
274
275
276
277
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 265

def child_parent_name(decl)
  case decl
  when AST::StructDecl then decl.name
  when AST::UnionDecl then decl.name
  when AST::EnumDecl then decl.name
  when AST::FlagsDecl then decl.name
  when AST::VariantDecl then decl.name
  when AST::InterfaceDecl then decl.name
  when AST::OpaqueDecl then decl.name
  when AST::ExtendingBlock then decl.type_name.name.parts.join('.')
  else nil
  end
end

#child_symbols_for(decl) ⇒ Object 



279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 279

def child_symbols_for(decl)
  case decl
  when AST::StructDecl
    field_children = (decl.fields&.map { |f| child_field_symbol(f) } || []).compact
    nested_children = (decl.nested_types&.map { |n| child_nested_struct_symbol(n) } || []).compact
    event_children = (decl.events&.map { |e| child_event_symbol(e) } || []).compact
    field_children + nested_children + event_children
  when AST::UnionDecl
    (decl.fields&.map { |f| child_field_symbol(f) } || []).compact
  when AST::EnumDecl, AST::FlagsDecl
    (decl.members&.map { |m| child_member_symbol(m, default_line: decl.line) } || []).compact
  when AST::VariantDecl
    (decl.arms&.map { |a| child_variant_arm_symbol(a, default_line: decl.line) } || []).compact
  when AST::InterfaceDecl
    (decl.methods&.map { |m| child_method_symbol(m) } || []).compact
  when AST::ExtendingBlock
    (decl.methods&.map { |m| child_method_symbol(m) } || []).compact
  else nil
  end
end

#child_variant_arm_symbol(a, default_line: nil) ⇒ Object 



369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 369

def child_variant_arm_symbol(a, default_line: nil)
  line = (a.line) ? a.line : default_line
  return nil unless a.respond_to?(:name) && a.name && line
  col = a.column ? a.column : 1

  detail = nil
  if a.respond_to?(:fields) && a.fields&.any?
    fields = a.fields.map { |f| "#{f.name}: #{type_detail_string(f.type)}" }.join(', ')
    detail = "(#{fields})"
  end

  {
    name: a.name, kind: 22,
    detail: detail,
    range: { start: { line: line - 1, character: 0 }, end: { line: line, character: 0 } },
    selectionRange: {
      start: { line: line - 1, character: col - 1 },
      end: { line: line - 1, character: col - 1 + a.name.length },
    },
  }.compact
end

#collect_local_decls(body) ⇒ 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
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 447

def collect_local_decls(body)
  return [] unless body

  case body
  when Array
    body.flat_map { |stmt| collect_local_decls(stmt) }.compact
  when AST::LocalDecl
    [body]
  when AST::IfStmt
    (body.branches || []).flat_map { |b| collect_local_decls(b.body) } +
      collect_local_decls(body.else_body)
  when AST::WhileStmt
    collect_local_decls(body.body)
  when AST::ForStmt
    collect_local_decls(body.body) + body.bindings
  when AST::MatchStmt
    (body.arms || []).flat_map { |arm| collect_local_decls(arm.body) }
  when AST::ParallelBlockStmt
    (body.bodies || []).flat_map { |b| collect_local_decls(b) }
  when AST::DeferStmt
    collect_local_decls(body.body)
  when AST::UnsafeStmt
    collect_local_decls(body.body)
  when AST::WhenStmt
    (body.branches || []).flat_map { |b| collect_local_decls(b.body) } +
      collect_local_decls(body.else_body)
  when AST::ErrorBlockStmt
    collect_local_decls(body.body)
  else
    []
  end
end

#collect_nested_type_names(decl) ⇒ Object 



314
315
316
317
318
319
320
321
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 314

def collect_nested_type_names(decl)
  names = []
  decl.nested_types.each do |nested|
    names << nested.name
    names.concat(collect_nested_type_names(nested))
  end
  names
end

#descendant_names(symbol) ⇒ Object 



559
560
561
562
563
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 559

def descendant_names(symbol)
  return [] unless symbol[:children]

  symbol[:children].flat_map { |c| [c[:name]] + descendant_names(c) }
end

#enrich_with_children(symbols, ast, facts) ⇒ Object 



78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
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
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 78

def enrich_with_children(symbols, ast, facts)
  removed_local_names = []
  removed_method_names = []
  removed_nested_type_names = []
  removed_event_names = []
  name_index = symbols.each_with_object(Hash.new { |h, k| h[k] = [] }) { |s, h| h[s[:name]] << s }

  flatten_module_declarations(ast.declarations).each do |decl|
    removed_nested_type_names.concat(collect_nested_type_names(decl)) if decl.is_a?(AST::StructDecl)

    case decl
    when AST::VarDecl
      parent = name_index[decl.name]&.find { |s| symbol_line(s) == (decl.line || 0) }
      next unless parent

      detail = decl.type ? type_detail_string(decl.type) : nil
      detail ||= resolved_local_type_detail(decl, facts)
      parent[:detail] = detail if detail

    when AST::TypeAliasDecl
      parent = name_index[decl.name]&.find { |s| symbol_line(s) == (decl.line || 0) }
      next unless parent

      if (detail = type_detail_string(decl.target))
        parent[:detail] = "= #{detail}"
      end

    when AST::ExternFunctionDecl, AST::ForeignFunctionDecl
      parent = name_index[decl.name]&.find { |s| symbol_line(s) == (decl.line || 0) }
      next unless parent

      detail_parts = []
      detail_parts << 'async' if decl.respond_to?(:async) && decl.async
      detail_parts << "-> #{type_detail_string(decl.return_type) || 'void'}"
      parent[:detail] = detail_parts.join(' ')

    when AST::EventDecl
      parent = name_index[decl.name]&.find { |s| symbol_line(s) == (decl.line || 0) }
      next unless parent

      parts = ["event[#{decl.capacity}]"]
      parts << "(#{type_detail_string(decl.payload_type)})" if decl.payload_type
      parent[:detail] = parts.join

    when AST::FunctionDef
      parent = name_index[decl.name]&.find { |s| symbol_line(s) == (decl.line || 0) }
      next unless parent

      detail_parts = []
      detail_parts << 'const' if decl.respond_to?(:const) && decl.const
      detail_parts << 'async' if decl.respond_to?(:async) && decl.async
      detail_parts << "-> #{type_detail_string(decl.return_type) || 'void'}"
      parent[:detail] = detail_parts.join(' ')

      locals = collect_local_decls(decl.body)
      append_local_children(parent, locals, facts, removed_local_names)
    when AST::ExtendingBlock
      type_name_str = decl.type_name.name.parts.join('.')

      # Find the extending block's own flat token symbol by name + line,
      # enrich it in-place with the implementation detail and methods.
      parent = name_index[type_name_str]&.find { |s| s[:kind] == 23 && symbol_line(s) == (decl.line || 0) }
      unless parent
        line = decl.line || 0
        parent = {
          name: type_name_str,
          kind: 23,
          detail: 'implementation',
          range: { start: { line: line - 1, character: 0 }, end: { line: line, character: 0 } },
          selectionRange: { start: { line: line - 1, character: 0 }, end: { line: line - 1, character: type_name_str.length } },
          children: [],
        }
        symbols << parent
        name_index[type_name_str] << parent
      end
      parent[:detail] = 'implementation'

      (decl.methods || []).each do |method|
        next unless method.respond_to?(:name) && method.name

        child = child_method_symbol(method)
        next unless child

        parent[:children] ||= []
        parent_children = parent[:children]
        parent_children << child unless parent_children.any? { |pc| pc[:name] == child[:name] }
        removed_method_names << child[:name] if child[:kind] == 6

        locals = collect_local_decls(method.respond_to?(:body) ? method.body : nil)
        append_local_children(child, locals, facts, removed_local_names)
      end
    when AST::ConstDecl
      parent = name_index[decl.name]&.find { |s| symbol_line(s) == (decl.line || 0) }
      next unless parent

      if decl.respond_to?(:type) && (detail = type_detail_string(decl.type))
        parent[:detail] = detail
      end

      next unless decl.block_body

      locals = collect_local_decls(decl.block_body)
      append_local_children(parent, locals, facts, removed_local_names)
    else
      parent_name = child_parent_name(decl)
      parent = parent_name ? name_index[parent_name]&.find { |s| symbol_line(s) == (decl.line || 0) } : nil
      next unless parent

      detail_parts = []
      if decl.is_a?(AST::StructDecl) && decl.implements&.any?
        ifaces = decl.implements.map { |i|
          base = i.respond_to?(:parts) ? i.parts.join('.') : i.name.parts.join('.')
          type_args = i.respond_to?(:type_arguments) ? i.type_arguments : i.respond_to?(:arguments) ? i.arguments : []
          args = if type_args&.any?
                  arg_strs = type_args.map { |a| a.respond_to?(:name) ? a.name.parts.join('.') : a.respond_to?(:parts) ? a.parts.join('.') : a.to_s }
                  "[#{arg_strs.join(', ')}]"
                else
                  ""
                end
          "#{base}#{args}"
        }.join(', ')
        detail_parts << "(#{ifaces})"
      end

      if decl.respond_to?(:backing_type) && decl.backing_type && (bt = type_detail_string(decl.backing_type))
        detail_parts << ": #{bt}"
      end

      if (generic = generic_signature_detail(decl))
        detail_parts << generic
      end

      parent[:detail] = detail_parts.join(' ') unless detail_parts.empty?

      type_params = expand_generic_type_params(decl)
      if type_params&.any?
        parent[:children] ||= []
        parent_children = parent[:children]
        type_params.each do |tp|
          child = type_param_child_symbol(tp)
          next unless child
          parent_children << child unless parent_children.any? { |pc| pc[:name] == child[:name] }
        end
      end

      children = child_symbols_for(decl)
      next unless children&.any?

      parent[:children] ||= []
      parent_children = parent[:children]
      children.each do |c|
        next if parent_children.any? { |pc| pc[:name] == c[:name] }

        parent_children << c
        case c[:kind]
        when 6 then removed_method_names << c[:name]
        when 23 then removed_nested_type_names << c[:name]
        when 24 then removed_event_names << c[:name]
        end
      end
    end
  end

  if removed_local_names.any?
    removed_set = removed_local_names.to_set
    symbols.reject! { |s| s[:kind] == 13 && removed_set.include?(s[:name]) }
  end
  if removed_method_names.any?
    removed_set = removed_method_names.to_set
    symbols.reject! { |s| (s[:kind] == 6 || s[:kind] == 12) && removed_set.include?(s[:name]) }
  end
  if removed_nested_type_names.any?
    removed_set = removed_nested_type_names.to_set
    symbols.reject! { |s| s[:kind] == 23 && removed_set.include?(s[:name]) && (!s[:children] || s[:children].empty?) }
  end
  if removed_event_names.any?
    removed_set = removed_event_names.to_set
    symbols.reject! { |s| s[:kind] == 24 && removed_set.include?(s[:name]) && (!s[:children] || s[:children].empty?) }
  end

  symbols
end

#expand_generic_type_params(decl) ⇒ Object 



565
566
567
568
569
570
571
572
573
574
575
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 565

def expand_generic_type_params(decl)
  return [] unless decl.respond_to?(:type_params) && decl.type_params

  decl.type_params.flat_map do |tp|
    if tp.respond_to?(:type_params) && tp.type_params&.any?
      expand_generic_type_params(tp)
    else
      [tp]
    end
  end
end

#flatten_module_declarations(declarations) ⇒ Object

Module-level when branches are compile-time conditionals; the token symbol scan lists their declarations, so flatten the branch bodies so the enrichment below can type them like ordinary top-level decls.



407
408
409
410
411
412
413
414
415
416
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 407

def flatten_module_declarations(declarations)
  (declarations || []).flat_map do |decl|
    if decl.is_a?(AST::WhenStmt)
      (decl.branches || []).flat_map { |b| flatten_module_declarations(b.body) } +
        flatten_module_declarations(decl.else_body)
    else
      [decl]
    end
  end
end

#generic_signature_detail(decl) ⇒ Object

Renders the generic parameter clause of a type declaration, e.g. [A, B] for struct Pair[A, B] or [@a] for struct Buffer[@a].



393
394
395
396
397
398
399
400
401
402
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 393

def generic_signature_detail(decl)
  parts = []
  if decl.respond_to?(:lifetime_params) && decl.lifetime_params&.any?
    parts.concat(decl.lifetime_params.map(&:to_s))
  end
  if decl.respond_to?(:type_params) && decl.type_params&.any?
    parts.concat(decl.type_params.map { |tp| tp.respond_to?(:name) ? tp.name : tp.to_s })
  end
  parts.empty? ? nil : "[#{parts.join(', ')}]"
end

#handle_document_symbols(params) ⇒ Object 



9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 9

def handle_document_symbols(params)
  stages = new_perf_stages
  total_start = stages ? monotonic_time : nil
  uri = params['textDocument']['uri']
  symbols = measure_perf_stage(stages, 'symbols') { @workspace.get_symbols(uri) }
  result = measure_perf_stage(stages, 'format') { symbols.map { |sym| format_document_symbol(sym) } }

  # Enrich with hierarchical children from AST
  ast = @workspace.get_ast(uri)
  if ast && result
    facts = @workspace.get_facts(uri)
    enrich_with_children(result, ast, facts)
  end

  module_name = resolve_outline_module_name(uri)
  result = wrap_in_module_hierarchy(result, module_name, uri) if module_name && result&.any?

  result
rescue StandardError => e
  warn "Error in documentSymbol handler: #{e.message}"
  []
ensure
  symbol_count = defined?(result) && result ? result.length : 0
  log_request_stage_breakdown('textDocument/documentSymbol', total_start, uri: uri, stages: stages, summary: "symbols=#{symbol_count}")
end

#handle_formatting(params) ⇒ Object 



636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 636

def handle_formatting(params)
  uri     = params['textDocument']['uri']
  content = @workspace.get_content(uri)

  formatted = Formatter.format_source(content, path: uri, mode: @format_mode)
  line_count = content.count("\n")

  [
    {
      range: {
        start: { line: 0, character: 0 },
        end:   { line: line_count + 1, character: 0 }
      },
      newText: formatted
    }
  ]
rescue StandardError => e
  warn "Error in formatting handler: #{e.message}"
  []
end

#handle_range_formatting(params) ⇒ Object 



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
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 657

def handle_range_formatting(params)
  uri = params['textDocument']['uri']
  content = @workspace.get_content(uri)
  range = params['range'] || {}
  start_pos = range['start'] || { 'line' => 0, 'character' => 0 }
  end_pos = range['end'] || { 'line' => 0, 'character' => 0 }

  start_off = @workspace.position_to_offset(uri, start_pos['line'], start_pos['character'])
  end_off = @workspace.position_to_offset(uri, end_pos['line'], end_pos['character'])
  return [] if end_off < start_off

  segment = content.byteslice(start_off...end_off).to_s
  formatted_segment = Formatter.format_source(segment, path: uri, mode: @format_mode)

  [
    {
      range: {
        start: { line: start_pos['line'], character: start_pos['character'] },
        end: { line: end_pos['line'], character: end_pos['character'] }
      },
      newText: formatted_segment
    }
  ]
rescue StandardError => e
  warn "Error in rangeFormatting handler: #{e.message}"
  []
end

#local_decl_symbol(decl, facts: nil) ⇒ Object 



480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 480

def local_decl_symbol(decl, facts: nil)
  return nil unless decl.name
  return nil if decl.name == '_'

  line = decl.line || 0
  col = decl.column || 1
  detail = decl.respond_to?(:type) ? type_detail_string(decl.type) : nil

  children = []
  if decl.respond_to?(:value) && decl.value.is_a?(AST::ProcExpr)
    detail ||= proc_signature_detail(decl.value)
    proc_locals = collect_local_decls(decl.value.body)
    children = proc_locals.filter_map { |l| local_decl_symbol(l, facts:) }
  end
  detail ||= resolved_local_type_detail(decl, facts)

  {
    name: decl.name, kind: 13,
    detail: detail,
    range: { start: { line: line - 1, character: col - 1 }, end: { line: line - 1, character: col - 1 + decl.name.length } },
    selectionRange: { start: { line: line - 1, character: col - 1 }, end: { line: line - 1, character: col - 1 + decl.name.length } },
    children: children.any? ? children : nil,
  }.compact
end

#proc_signature_detail(proc_expr) ⇒ Object 



592
593
594
595
596
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 592

def proc_signature_detail(proc_expr)
  params = proc_expr.params&.map { |p| "#{p.name}: #{type_detail_string(p.type)}" }&.join(', ') || ''
  ret = type_detail_string(proc_expr.return_type) || 'void'
  "proc(#{params}) -> #{ret}"
end

#resolve_outline_module_name(uri) ⇒ Object 



35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 35

def resolve_outline_module_name(uri)
  module_name = @workspace.module_name_for_uri(uri) || @workspace.get_facts(uri)&.module_name
  return nil unless module_name && !module_name.empty?

  segments = module_name.split('.')
  return nil if segments.length <= 1

  # Only wrap files that live under a real source root: either a
  # package.toml directory or the std/ library hierarchy.
  path = @workspace.send(:uri_to_path, uri)
  if path && !MilkTea::ModuleRoots.package_root_for_path(path) && !path.split('/').include?('std')
    return nil
  end

  module_name
end

#resolved_local_type_detail(decl, facts) ⇒ Object

Resolves the declared type of an inferred local from semantic facts. Prefers the sema binding type (which reflects let/var ... else: and other flow refinement), falling back to the initializer expression type recorded during checking. Returns nil when facts are unavailable or the binding is missing.



510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 510

def resolved_local_type_detail(decl, facts)
  return nil unless facts
  return nil unless facts.respond_to?(:binding_resolution) && facts.binding_resolution

  binding_id = facts.binding_resolution.declaration_binding_ids[decl.object_id]
  if binding_id
    type = facts.binding_resolution.binding_types[binding_id]
    return nil if type.is_a?(Types::Error)
    return short_type_detail(type) if type
  end

  return nil unless decl.respond_to?(:value) && decl.value
  return nil unless facts.respond_to?(:resolved_expr_types)

  node_id = facts.respond_to?(:ast) && facts.ast ? facts.ast.node_ids[decl.value.object_id] : nil
  return nil unless node_id

  type = facts.resolved_expr_types[node_id]
  return nil if type.is_a?(Types::Error)

  short_type_detail(type)
end

#short_type_arg(arg) ⇒ Object 



555
556
557
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 555

def short_type_arg(arg)
  arg.is_a?(Types::LiteralTypeArg) ? arg.value.to_s : short_type_detail(arg)
end

#short_type_detail(type) ⇒ Object

Renders a resolved semantic type for outline display without module qualifiers (e.g. std.deque.Deque as Deque). Falls back to the canonical #to_s when a type has no usable short form.



536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 536

def short_type_detail(type)
  return nil unless type

  case type
  when Types::Nullable
    "#{short_type_detail(type.base)}?"
  when Types::Span
    "span[#{short_type_detail(type.element_type)}]"
  when Types::SoA
    "SoA[#{short_type_detail(type.element_type)}, #{type.count}]"
  when Types::StructInstance, Types::VariantInstance, Types::GenericInstance
    args = type.arguments.map { |arg| short_type_arg(arg) }.join(', ')
    args.empty? ? type.name : "#{type.name}[#{args}]"
  else
    name = type.respond_to?(:name) ? type.name.to_s : ''
    name.empty? ? type.to_s : name
  end
end

#symbol_line(symbol) ⇒ Object 



261
262
263
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 261

def symbol_line(symbol)
  symbol.dig(:range, :start, :line)&.+ 1 || 0
end

#type_detail_string(type) ⇒ Object 



617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 617

def type_detail_string(type)
  return nil unless type

  case type
  when AST::TypeRef
    type.to_s
  when AST::FunctionType, AST::ProcType
    params = (type.params || []).map { |p| type_detail_string(p.type) }.join(', ')
    ret = type_detail_string(type.return_type) || 'void'
    keyword = type.is_a?(AST::FunctionType) ? 'fn' : 'proc'
    "#{keyword}(#{params}) -> #{ret}"
  when AST::TupleType
    base = "(#{(type.element_types || []).map { |t| type_detail_string(t) }.join(', ')})"
    type.nullable ? "#{base}?" : base
  when AST::DynType
    "dyn[#{type.interface}]"
  end
end

#type_param_child_symbol(tp) ⇒ Object 



577
578
579
580
581
582
583
584
585
586
587
588
589
590
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 577

def type_param_child_symbol(tp)
  return nil unless tp.respond_to?(:name) && tp.name
  return nil unless tp.line

  col = tp.column ? tp.column : 1
  {
    name: tp.name, kind: 26,
    range: { start: { line: tp.line - 1, character: col - 1 }, end: { line: tp.line - 1, character: col - 1 + tp.name.length } },
    selectionRange: {
      start: { line: tp.line - 1, character: col - 1 },
      end: { line: tp.line - 1, character: col - 1 + tp.name.length },
    },
  }
end

#wrap_in_module_hierarchy(symbols, module_name, uri) ⇒ Object 



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
 
# File 'lib/milk_tea/lsp/server/formatting.rb', line 52

def wrap_in_module_hierarchy(symbols, module_name, uri)
  return symbols unless module_name && !module_name.empty?

  segments = module_name.split('.')
  return symbols if segments.length <= 1

  content = @workspace.get_content(uri)
  total_lines = content ? content.count("\n") : 0
  file_range = {
    start: { line: 0, character: 0 },
    end: { line: total_lines, character: 0 },
  }

  children = symbols
  segments.reverse.each do |seg|
    children = [{
      name: seg,
      kind: 2,
      range: file_range,
      selectionRange: file_range,
      children: children,
    }]
  end
  children
end