Sha256: e8edc23d526a751df3f1c09613b16d1e90eab8d02cce84988568c689f394dbc0
Contents?: true
Size: 1.57 KB
Versions: 168
Compression:
Stored size: 1.57 KB
Contents
# frozen_string_literal: true
module GraphQL
module Execution
# @api private
module Typecast
# @return [Boolean]
def self.subtype?(parent_type, child_type)
if parent_type == child_type
# Equivalent types are subtypes
true
elsif child_type.is_a?(GraphQL::NonNullType)
# A non-null type is a subtype of a nullable type
# if its inner type is a subtype of that type
if parent_type.is_a?(GraphQL::NonNullType)
subtype?(parent_type.of_type, child_type.of_type)
else
subtype?(parent_type, child_type.of_type)
end
else
case parent_type
when GraphQL::InterfaceType
# A type is a subtype of an interface
# if it implements that interface
case child_type
when GraphQL::ObjectType
child_type.interfaces.include?(parent_type)
else
false
end
when GraphQL::UnionType
# A type is a subtype of that union
# if the union includes that type
parent_type.possible_types.include?(child_type)
when GraphQL::ListType
# A list type is a subtype of another list type
# if its inner type is a subtype of the other inner type
case child_type
when GraphQL::ListType
subtype?(parent_type.of_type, child_type.of_type)
else
false
end
else
false
end
end
end
end
end
end
Version data entries
168 entries across 168 versions & 2 rubygems