Class: RBS::Test::TypeCheck

Inherits:
Object
  • Object
show all
Defined in:
lib/rbs/test/type_check.rb

Constant Summary collapse

DEFAULT_SAMPLE_SIZE = 
100

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(self_class:, builder:, sample_size:, unchecked_classes:, instance_class: Object, class_class: Module) ⇒ TypeCheck

Returns a new instance of TypeCheck.



15
16
17
18
19
20
21
22
23
 
# File 'lib/rbs/test/type_check.rb', line 15

def initialize(self_class:, builder:, sample_size:, unchecked_classes:, instance_class: Object, class_class: Module)
  @self_class = self_class
  @instance_class = instance_class
  @class_class = class_class
  @builder = builder
  @sample_size = sample_size
  @unchecked_classes = unchecked_classes.uniq
  @const_cache = {}
end

Instance Attribute Details

#builder ⇒ Object (readonly)

Returns the value of attribute builder.



5
6
7
 
# File 'lib/rbs/test/type_check.rb', line 5

def builder
  @builder
end

#class_class ⇒ Object (readonly)

Returns the value of attribute class_class.



9
10
11
 
# File 'lib/rbs/test/type_check.rb', line 9

def class_class
  @class_class
end

#const_cache ⇒ Object (readonly)

Returns the value of attribute const_cache.



11
12
13
 
# File 'lib/rbs/test/type_check.rb', line 11

def const_cache
  @const_cache
end

#instance_class ⇒ Object (readonly)

Returns the value of attribute instance_class.



8
9
10
 
# File 'lib/rbs/test/type_check.rb', line 8

def instance_class
  @instance_class
end

#sample_size ⇒ Object (readonly)

Returns the value of attribute sample_size.



6
7
8
 
# File 'lib/rbs/test/type_check.rb', line 6

def sample_size
  @sample_size
end

#self_class ⇒ Object (readonly)

Returns the value of attribute self_class.



4
5
6
 
# File 'lib/rbs/test/type_check.rb', line 4

def self_class
  @self_class
end

#unchecked_classes ⇒ Object (readonly)

Returns the value of attribute unchecked_classes.



7
8
9
 
# File 'lib/rbs/test/type_check.rb', line 7

def unchecked_classes
  @unchecked_classes
end

Instance Method Details

#args(method_name, method_type, fun, call, errors, type_error:, argument_error:) ⇒ Object 



77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
 
# File 'lib/rbs/test/type_check.rb', line 77

def args(method_name, method_type, fun, call, errors, type_error:, argument_error:)
  test = zip_args(call.arguments, fun) do |val, param|
    unless self.value(val, param.type)
      errors << type_error.new(klass: self_class,
                               method_name: method_name,
                               method_type: method_type,
                               param: param,
                               value: val)
    end
  end

  unless test
    errors << argument_error.new(klass: self_class,
                                 method_name: method_name,
                                 method_type: method_type)
  end
end

#each_sample(array, &block) ⇒ Object 



191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
 
# File 'lib/rbs/test/type_check.rb', line 191

def each_sample(array, &block)
  if block
    if sample_size && array.size > sample_size
      if sample_size > 0
        size = array.size
        sample_size.times do
          yield array[rand(size)]
        end
      end
    else
      array.each(&block)
    end
  else
    enum_for :each_sample, array
  end
end

#get_class(type_name) ⇒ Object 



208
209
210
211
212
213
214
 
# File 'lib/rbs/test/type_check.rb', line 208

def get_class(type_name)
  const_cache[type_name] ||= begin
                               Object.const_get(type_name.to_s)
                             rescue NameError
                               nil
                             end
end

#is_double?(value) ⇒ Boolean

Returns:

  • (Boolean) 


216
217
218
219
220
 
# File 'lib/rbs/test/type_check.rb', line 216

def is_double?(value)
  unchecked_classes.any? { |unchecked_class| Test.call(value, IS_AP, Object.const_get(unchecked_class))}
rescue NameError
  false
end

#keyword?(value) ⇒ Boolean

Returns:

  • (Boolean) 


136
137
138
 
# File 'lib/rbs/test/type_check.rb', line 136

def keyword?(value)
  value.is_a?(Hash) && value.keys.all? {|key| key.is_a?(Symbol) }
end

#method_call(method_name, method_type, call, errors:) ⇒ Object 



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
 
# File 'lib/rbs/test/type_check.rb', line 49

def method_call(method_name, method_type, call, errors:)
  args(method_name, method_type, method_type.type, call.method_call, errors, type_error: Errors::ArgumentTypeError, argument_error: Errors::ArgumentError)
  self.return(method_name, method_type, method_type.type, call.method_call, errors, return_error: Errors::ReturnTypeError)

  if method_type.block
    case
    when !call.block_calls.empty?
      call.block_calls.each do |block_call|
        args(method_name, method_type, method_type.block.type, block_call, errors, type_error: Errors::BlockArgumentTypeError, argument_error: Errors::BlockArgumentError)
        self.return(method_name, method_type, method_type.block.type, block_call, errors, return_error: Errors::BlockReturnTypeError)
      end
    when !call.block_given
      # Block is not given
      if method_type.block.required
        errors << Errors::MissingBlockError.new(klass: self_class, method_name: method_name, method_type: method_type)
      end
    else
      # Block is given, but not yielded
    end
  else
    if call.block_given
      errors << Errors::UnexpectedBlockError.new(klass: self_class, method_name: method_name, method_type: method_type)
    end
  end

  errors
end

#overloaded_call(method, method_name, call, errors:) ⇒ Object 



25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
 
# File 'lib/rbs/test/type_check.rb', line 25

def overloaded_call(method, method_name, call, errors:)
  es = method.method_types.map do |method_type|
    es = method_call(method_name, method_type, call, errors: [])

    if es.empty?
      return errors
    else
      es
    end
  end

  if es.size == 1
    errors.push(*es[0])
  else
    errors << Errors::UnresolvedOverloadingError.new(
      klass: self_class,
      method_name: method_name,
      method_types: method.method_types
    )
  end

  errors
end

#return(method_name, method_type, fun, call, errors, return_error:) ⇒ Object 



95
96
97
98
99
100
101
102
103
104
105
 
# File 'lib/rbs/test/type_check.rb', line 95

def return(method_name, method_type, fun, call, errors, return_error:)
  if call.return?
    unless value(call.return_value, fun.return_type)
      errors << return_error.new(klass: self_class,
                                 method_name: method_name,
                                 method_type: method_type,
                                 type: fun.return_type,
                                 value: call.return_value)
    end
  end
end

#value(val, type) ⇒ Object 



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
 
# File 'lib/rbs/test/type_check.rb', line 222

def value(val, type)
  if is_double?(val)
    RBS.logger.info("A double (#{val.inspect}) is detected!")
    return true
  end

  case type
  when Types::Bases::Any
    true
  when Types::Bases::Bool
    val.is_a?(TrueClass) || val.is_a?(FalseClass)
  when Types::Bases::Top
    true
  when Types::Bases::Bottom
    false
  when Types::Bases::Void
    true
  when Types::Bases::Self
    Test.call(val, IS_AP, self_class)
  when Types::Bases::Nil
    Test.call(val, IS_AP, ::NilClass)
  when Types::Bases::Class
    Test.call(val, IS_AP, class_class)
  when Types::Bases::Instance
    Test.call(val, IS_AP, instance_class)
  when Types::ClassInstance
    klass = get_class(type.name) or return false
    case
    when klass == ::Array
      Test.call(val, IS_AP, klass) && each_sample(val).all? {|v| value(v, type.args[0]) }
    when klass == ::Hash
      Test.call(val, IS_AP, klass) && each_sample(val.keys).all? do |key|
        value(key, type.args[0]) && value(val[key], type.args[1])
      end
    when klass == ::Range
      Test.call(val, IS_AP, klass) && value(val.begin, type.args[0]) && value(val.end, type.args[0])
    when klass == ::Enumerator
      if Test.call(val, IS_AP, klass)
        case val.size
        when Float::INFINITY
          values = []
          ret = self
          val.lazy.take(10).each do |*args|
            values << args
            nil
          end
        else
          values = []
          ret = val.each do |*args|
            values << args
            nil
          end
        end

        each_sample(values).all? do |v|
          if v.size == 1
            # Only one block argument.
            value(v[0], type.args[0]) || value(v, type.args[0])
          else
            value(v, type.args[0])
          end
        end &&
          if ret.equal?(self)
            type.args[1].is_a?(Types::Bases::Bottom)
          else
            value(ret, type.args[1])
          end
      end
    else
      Test.call(val, IS_AP, klass)
    end
  when Types::ClassSingleton
    klass = get_class(type.name) or return false
    singleton_class = begin
                        klass.singleton_class
                      rescue TypeError
                        return false
                      end
    val.is_a?(singleton_class)
  when Types::Interface
    methods = Set.new(Test.call(val, METHODS))
    if (definition = builder.build_interface(type.name))
      definition.methods.each_key.all? do |method_name|
        methods.member?(method_name)
      end
    end
  when Types::Variable
    true
  when Types::Literal
    val == type.literal
  when Types::Union
    type.types.any? {|type| value(val, type) }
  when Types::Intersection
    type.types.all? {|type| value(val, type) }
  when Types::Optional
    Test.call(val, IS_AP, ::NilClass) || value(val, type.type)
  when Types::Alias
    value(val, builder.expand_alias(type.name))
  when Types::Tuple
    Test.call(val, IS_AP, ::Array) &&
      type.types.map.with_index {|ty, index| value(val[index], ty) }.all?
  when Types::Record
    Test::call(val, IS_AP, ::Hash) &&
      type.fields.map {|key, type| value(val[key], type) }.all?
  when Types::Proc
    Test::call(val, IS_AP, ::Proc)
  else
    false
  end
end

#zip_args(args, fun, &block) ⇒ Object 



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
 
# File 'lib/rbs/test/type_check.rb', line 140

def zip_args(args, fun, &block)
  case
  when args.empty?
    if fun.required_positionals.empty? && fun.trailing_positionals.empty? && fun.required_keywords.empty?
      true
    else
      false
    end
  when !fun.required_positionals.empty?
    yield_self do
      param, fun_ = fun.drop_head
      yield(args.first, param)
      zip_args(args.drop(1), fun_, &block)
    end
  when fun.has_keyword?
    yield_self do
      hash = args.last
      if keyword?(hash)
        zip_keyword_args(hash, fun, &block) &&
          zip_args(args.take(args.size - 1),
                   fun.update(required_keywords: {}, optional_keywords: {}, rest_keywords: nil),
                   &block)
      else
        fun.required_keywords.empty? &&
          zip_args(args,
                   fun.update(required_keywords: {}, optional_keywords: {}, rest_keywords: nil),
                   &block)
      end
    end
  when !fun.trailing_positionals.empty?
    yield_self do
      param, fun_ = fun.drop_tail
      yield(args.last, param)
      zip_args(args.take(args.size - 1), fun_, &block)
    end
  when !fun.optional_positionals.empty?
    yield_self do
      param, fun_ = fun.drop_head
      yield(args.first, param)
      zip_args(args.drop(1), fun_, &block)
    end
  when fun.rest_positionals
    yield_self do
      yield(args.first, fun.rest_positionals)
      zip_args(args.drop(1), fun, &block)
    end
  else
    false
  end
end

#zip_keyword_args(hash, fun) ⇒ Object 



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
 
# File 'lib/rbs/test/type_check.rb', line 107

def zip_keyword_args(hash, fun)
  fun.required_keywords.each do |name, param|
    if hash.key?(name)
      yield(hash[name], param)
    else
      return false
    end
  end

  fun.optional_keywords.each do |name, param|
    if hash.key?(name)
      yield(hash[name], param)
    end
  end

  hash.each do |name, value|
    next if fun.required_keywords.key?(name)
    next if fun.optional_keywords.key?(name)

    if fun.rest_keywords
      yield value, fun.rest_keywords
    else
      return false
    end
  end

  true
end