-
Notifications
You must be signed in to change notification settings - Fork 199
/
writer.rb
381 lines (325 loc) · 9.14 KB
/
writer.rb
1
2
3
4
5
6
7
8
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
34
35
36
37
38
39
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
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
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
308
309
310
311
312
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
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
# frozen_string_literal: true
module RBS
class Writer
attr_reader :out
attr_reader :indentation
def initialize(out:)
@out = out
@indentation = []
@preserve = false
end
def preserve?
@preserve
end
def preserve!(preserve: true)
@preserve = preserve
self
end
def indent(size = 2)
indentation.push(" " * size)
yield
ensure
indentation.pop
end
def prefix
indentation.join()
end
def puts(string = "")
if string.size > 0
@out.puts("#{prefix}#{string}")
else
@out.puts
end
end
def format_annotation(annotation)
string = annotation.string
case
when string !~ /\}/
"%a{#{string}}"
when string !~ /\)/
"%a(#{string})"
when string !~ /\]/
"%a[#{string}]"
when string !~ /\>/
"%a<#{string}>"
when string !~ /\|/
"%a|#{string}|"
else
raise
end
end
def write_annotation(annotations)
annotations.each do |annotation|
puts format_annotation(annotation)
end
end
def write_comment(comment)
if comment
comment.string.lines.each do |line|
line = line.chomp
unless line.empty?
puts "# #{line}"
else
puts "#"
end
end
end
end
def write(decls)
[nil, *decls].each_cons(2) do |prev, decl|
raise unless decl
preserve_empty_line(prev, decl)
write_decl decl
end
end
def write_decl(decl)
case decl
when AST::Declarations::Class
super_class = if super_class = decl.super_class
" < #{name_and_args(super_class.name, super_class.args)}"
end
write_comment decl.comment
write_annotation decl.annotations
puts "class #{name_and_params(decl.name, decl.type_params)}#{super_class}"
indent do
[nil, *decl.members].each_cons(2) do |prev, member|
raise unless member
preserve_empty_line prev, member
write_member member
end
end
puts "end"
when AST::Declarations::Module
self_type = unless decl.self_types.empty?
" : #{decl.self_types.join(", ")}"
end
write_comment decl.comment
write_annotation decl.annotations
puts "module #{name_and_params(decl.name, decl.type_params)}#{self_type}"
indent do
decl.members.each.with_index do |member, index|
if index > 0
puts
end
write_member member
end
end
puts "end"
when AST::Declarations::Constant
write_comment decl.comment
puts "#{decl.name}: #{decl.type}"
when AST::Declarations::Global
write_comment decl.comment
puts "#{decl.name}: #{decl.type}"
when AST::Declarations::Alias
write_comment decl.comment
write_annotation decl.annotations
write_loc_source(decl) {
puts "type #{name_and_params(decl.name, decl.type_params)} = #{decl.type}"
}
when AST::Declarations::Interface
write_comment decl.comment
write_annotation decl.annotations
puts "interface #{name_and_params(decl.name, decl.type_params)}"
indent do
decl.members.each.with_index do |member, index|
if index > 0
puts
end
write_member member
end
end
puts "end"
end
end
def name_and_params(name, params)
if params.empty?
"#{name}"
else
ps = params.each.map do |param|
param.to_s
end
"#{name}[#{ps.join(", ")}]"
end
end
def name_and_args(name, args)
if name && args
if args.empty?
"#{name}"
else
"#{name}[#{args.join(", ")}]"
end
end
end
def put_lines(lines, leading_spaces:)
lines.each_line.with_index do |line, index|
line.chomp!
line.rstrip!
line.sub!(/\A( {,#{leading_spaces}})/, '') if index > 0
puts line
end
end
def write_member(member)
case member
when AST::Members::Include
write_comment member.comment
write_annotation member.annotations
puts "include #{name_and_args(member.name, member.args)}"
when AST::Members::Extend
write_comment member.comment
write_annotation member.annotations
puts "extend #{name_and_args(member.name, member.args)}"
when AST::Members::Prepend
write_comment member.comment
write_annotation member.annotations
puts "prepend #{name_and_args(member.name, member.args)}"
when AST::Members::AttrAccessor
write_comment member.comment
write_annotation member.annotations
puts "#{attribute(:accessor, member)}"
when AST::Members::AttrReader
write_comment member.comment
write_annotation member.annotations
puts "#{attribute(:reader, member)}"
when AST::Members::AttrWriter
write_comment member.comment
write_annotation member.annotations
puts "#{attribute(:writer, member)}"
when AST::Members::Public
puts "public"
when AST::Members::Private
puts "private"
when AST::Members::Alias
write_comment member.comment
write_annotation member.annotations
new_name = member.singleton? ? "self.#{member.new_name}" : member.new_name
old_name = member.singleton? ? "self.#{member.old_name}" : member.old_name
puts "alias #{new_name} #{old_name}"
when AST::Members::InstanceVariable
write_comment member.comment
puts "#{member.name}: #{member.type}"
when AST::Members::ClassInstanceVariable
write_comment member.comment
puts "self.#{member.name}: #{member.type}"
when AST::Members::ClassVariable
write_comment member.comment
puts "#{member.name}: #{member.type}"
when AST::Members::MethodDefinition
write_comment member.comment
write_annotation member.annotations
write_loc_source(member) { write_def member }
else
write_decl member
end
end
def method_name(name)
s = name.to_s
case s
when /\A(_?)[A-Za-z_]\w*(\?|!|=)?\Z/
s
when *%w(| ^ & <=> == === =~ > >= < <= << >> + - * / % ** ~ +@ -@ [] []= ` ! != !~)
s
else
"`#{s}`"
end
end
def write_loc_source(located)
if preserve? && loc = located.location
put_lines(loc.source, leading_spaces: loc.start_column)
else
yield
end
end
def write_def(member)
visibility =
case member.visibility
when :public
"public "
when :private
"private "
else
""
end
name = case member.kind
when :instance
"#{method_name(member.name)}"
when :singleton_instance
"self?.#{method_name(member.name)}"
when :singleton
"self.#{method_name(member.name)}"
end
string = +""
prefix = "#{visibility}def #{name}:"
padding = " " * (prefix.size-1)
string << prefix
member.overloads.each.with_index do |overload, index|
if index > 0
string << padding
string << "|"
end
overload.annotations.each do |annotation|
string << " #{format_annotation(annotation)}"
end
string << " #{overload.method_type}\n"
end
if member.overloading?
if member.overloads.size > 0
string << padding
string << "|"
end
string << " ...\n"
end
string.each_line do |line|
puts line.chomp
end
end
def attribute(kind, attr)
visibility =
case attr.visibility
when :public
"public "
when :private
"private "
else
""
end
var = case attr.ivar_name
when nil
""
when false
"()"
else
"(#{attr.ivar_name})"
end
receiver = case attr.kind
when :singleton
"self."
when :instance
""
end
"#{visibility}attr_#{kind} #{receiver}#{attr.name}#{var}: #{attr.type}"
end
def preserve_empty_line(prev, decl)
# @type var decl: _Located
return unless prev
if (_ = decl).respond_to?(:comment)
if comment = (_ = decl).comment
decl = comment
end
end
prev_loc = prev.location
decl_loc = decl.location
if prev_loc && decl_loc
prev_end_line = prev_loc.end_line
start_line = decl_loc.start_line
if start_line - prev_end_line > 1
puts
end
else
# When the signature is not constructed by the parser,
# it always inserts an empty line.
puts
end
end
end
end