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: nil, lower: nil, upper: nil) ⇒ TypeVariableModule

Returns a new instance of TypeVariableModule.



142
143
144
145
146
147
148
149
150
 
# File 'lib/tapioca/sorbet_ext/generic_name_patch.rb', line 142

def initialize(context, type, variance, fixed: nil, lower: nil, upper: nil)
  @context = context
  @type = type
  @variance = variance
  @fixed = fixed
  @lower = lower
  @upper = upper
  super()
end

Instance Method Details

#coerce_to_type_variable ⇒ Object 



187
188
189
 
# File 'lib/tapioca/sorbet_ext/generic_name_patch.rb', line 187

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

#name ⇒ Object 



153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
 
# File 'lib/tapioca/sorbet_ext/generic_name_patch.rb', line 153

def name
  constant_name = super

  # This is a hack to work around modules under anonymous modules not having
  # names in 2.6 and 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 



172
173
174
175
176
177
178
179
180
181
182
183
184
 
# File 'lib/tapioca/sorbet_ext/generic_name_patch.rb', line 172

def serialize
  fixed = @fixed.to_s if @fixed
  upper = @upper.to_s if @upper
  lower = @lower.to_s if @lower

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