Class: Tapioca::TypeVariableModule

Inherits:
Module
  • Object
show all
Extended by:
T::Sig
Defined in:
lib/tapioca/sorbet_ext/generic_name_patch.rb

Overview

This is subclassing from ‘Module` so that instances of this type will be modules. The reason why we want that is because that means those instances will automatically get bound to the constant names they are assigned to by Ruby. As a result, we don’t need to do any matching of constants to type variables to bind their names, Ruby will do that automatically for us and we get the ‘name` method for free from `Module`.

Defined Under Namespace

Classes: Type

Instance Method Summary collapse

Methods inherited from Module

#autoload, #autoload_without_tapioca

Constructor Details

#initialize(context, type, variance, fixed, lower, upper, bounds_proc) ⇒ TypeVariableModule

Returns a new instance of TypeVariableModule.



136
137
138
139
140
141
142
143
144
145
146
147
 
# File 'lib/tapioca/sorbet_ext/generic_name_patch.rb', line 136

def initialize(context, type, variance, fixed, lower, upper, bounds_proc)
  @context = context
  @type = type
  @variance = variance
  @bounds_proc = if bounds_proc
    bounds_proc
  else
    build_bounds_proc(fixed, lower, upper)
  end

  super()
end

Instance Method Details

#coerce_to_type_variable ⇒ Object 



190
191
192
 
# File 'lib/tapioca/sorbet_ext/generic_name_patch.rb', line 190

def coerce_to_type_variable
  TypeVariable.new(name, @variance)
end

#fixed? ⇒ Boolean

Returns:

  • (Boolean) 


170
171
172
 
# File 'lib/tapioca/sorbet_ext/generic_name_patch.rb', line 170

def fixed?
  bounds.key?(:fixed)
end

#name ⇒ Object 



151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
 
# File 'lib/tapioca/sorbet_ext/generic_name_patch.rb', line 151

def name
  constant_name = super

  # This is a hack to work around modules under anonymous modules not having
  # names in 2.7: https://bugs.ruby-lang.org/issues/14895
  #
  # This happens when a type variable is declared under `class << self`, for
  # example.
  #
  # The workaround is to give the parent context a name, at which point, our
  # module gets bound to a name under that name, as well.
  unless constant_name
    constant_name = with_bound_name_pre_3_0 { super }
  end

  constant_name&.split("::")&.last
end

#serialize ⇒ Object 



175
176
177
178
179
180
181
182
183
184
185
186
187
 
# File 'lib/tapioca/sorbet_ext/generic_name_patch.rb', line 175

def serialize
  fixed = bounds[:fixed].to_s if fixed?
  lower = bounds[:lower].to_s if bounds.key?(:lower)
  upper = bounds[:upper].to_s if bounds.key?(:upper)

  RBIHelper.serialize_type_variable(
    @type.serialize,
    @variance,
    fixed,
    upper,
    lower,
  )
end