Class: T::Types::ClassOf

Inherits:
Base
  • Object
show all
Defined in:
lib/types/types/class_of.rb

Overview

Validates that an object belongs to the specified class.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#==, #error_message_for_obj, #error_message_for_obj_recursive, #hash, method_added, #recursively_valid?, #subtype_of?, #to_s, #validate!

Constructor Details

#initialize(type) ⇒ ClassOf

Returns a new instance of ClassOf.



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# File 'lib/types/types/class_of.rb', line 9

def initialize(type)
  @type = type
end

Instance Attribute Details

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/types/types/class_of.rb', line 7

def type
  @type
end

Instance Method Details

#[](*types) ⇒ Object

So that ‘T.class_of(…)` syntax is valid. Mirrors the definition of T::Generic#[] (generics are erased).

We avoid simply writing ‘include T::Generic` because we don’t want any of the other methods to appear (‘T.class_of(A).type_member` doesn’t make sense)



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# File 'lib/types/types/class_of.rb', line 51

def [](*types)
  self
end

#build_type ⇒ Object 



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# File 'lib/types/types/class_of.rb', line 13

def build_type
  nil
end

#describe_obj(obj) ⇒ Object

overrides Base



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# File 'lib/types/types/class_of.rb', line 42

def describe_obj(obj)
  obj.inspect
end

#name ⇒ Object

overrides Base



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# File 'lib/types/types/class_of.rb', line 18

def name
  "T.class_of(#{@type})"
end

#subtype_of_single?(other) ⇒ Boolean

overrides Base

Returns:



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# File 'lib/types/types/class_of.rb', line 28

def subtype_of_single?(other)
  case other
  when ClassOf
    @type <= other.type
  when Simple
    @type.is_a?(other.raw_type)
  when TypedClass
    @type.is_a?(other.underlying_class)
  else
    false
  end
end

#valid?(obj) ⇒ Boolean

overrides Base

Returns:



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# File 'lib/types/types/class_of.rb', line 23

def valid?(obj)
  obj.is_a?(Module) && (obj <= @type || false)
end