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Contents
# frozen_string_literal: true
# typed: true
module T::Types
# Validates that an object belongs to the specified class.
class ClassOf < Base
attr_reader :type
def initialize(type)
@type = type
end
def build_type
nil
end
# overrides Base
def name
"T.class_of(#{@type})"
end
# overrides Base
def valid?(obj)
obj.is_a?(Module) && (obj <= @type || false)
end
# overrides Base
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
# overrides Base
def describe_obj(obj)
obj.inspect
end
# 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)
def [](*types)
self
end
end
end
Version data entries
50 entries across 50 versions & 1 rubygems