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Contents
# frozen_string_literal: true
module Fear
module PartialFunction
# Composite function produced by +PartialFunction#and_then+ method
# @api private
class AndThen
include PartialFunction
# @param partial_function [Fear::PartialFunction]
# @param function [Proc]
def initialize(partial_function, &function)
@partial_function = partial_function
@function = function
end
# @!attribute partial_function
# @return [Fear::PartialFunction]
# @!attribute function
# @return [Proc]
attr_reader :partial_function
attr_reader :function
private :partial_function
private :function
# @param arg [any]
# @return [any ]
def call(arg)
function.(partial_function.(arg))
end
# @param arg [any]
# @return [Boolean]
def defined_at?(arg)
partial_function.defined_at?(arg)
end
# @param arg [any]
# @yield [arg]
# @return [any]
def call_or_else(arg)
result = partial_function.call_or_else(arg) do
return yield(arg)
end
function.(result)
end
end
private_constant :AndThen
end
end
Version data entries
5 entries across 5 versions & 1 rubygems