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Contents
# frozen_string_literal: true
# typed: true
module T::Types
# Takes a hash of types. Validates each item in an hash using the type in the same position
# in the list.
class FixedHash < Base
attr_reader :types
def initialize(types)
@types = types.each_with_object({}) {|(k, v), h| h[k] = T::Utils.coerce(v)}
end
# @override Base
def name
"{#{@types.map {|(k, v)| "#{k}: #{v}"}.join(', ')}}"
end
# @override Base
def valid?(obj)
return false unless obj.is_a?(Hash)
@types.each do |key, type|
return false unless type.valid?(obj[key])
end
obj.each_key do |key|
return false unless @types[key]
end
true
end
# @override Base
private def subtype_of_single?(other)
case other
when FixedHash
# Using `subtype_of?` here instead of == would be unsound
@types == other.types
else
false
end
end
# This gives us better errors, e.g.:
# "Expected {a: String}, got {a: TrueClass}"
# instead of
# "Expected {a: String}, got Hash".
#
# @override Base
def describe_obj(obj)
if obj.is_a?(Hash)
"type {#{obj.map {|(k, v)| "#{k}: #{v.class}"}.join(', ')}}"
else
super
end
end
end
end
Version data entries
530 entries across 530 versions & 1 rubygems