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Contents
# frozen_string_literal: true
module Fear
module PartialFunction
# Composite function produced by +PartialFunction#and_then+ method
# @api private
class Combined
include PartialFunction
# @param f1 [Fear::PartialFunction]
# @param f2 [Fear::PartialFunction]
def initialize(f1, f2)
@f1 = f1
@f2 = f2
end
# @!attribute f1
# @return [Fear::PartialFunction]
# @!attribute f2
# @return [Fear::PartialFunction]
attr_reader :f1, :f2
private :f1
private :f2
# @param arg [any]
# @return [any ]
def call(arg)
f2.(f1.(arg))
end
alias === call
alias [] call
# @param arg [any]
# @yieldparam arg [any]
# @return [any]
def call_or_else(arg)
result = f1.call_or_else(arg) { return yield(arg) }
f2.call_or_else(result) { |_| return yield(arg) }
end
# @param arg [any]
# @return [Boolean]
def defined_at?(arg)
result = f1.call_or_else(arg) do
return false
end
f2.defined_at?(result)
end
end
private_constant :AndThen
end
end
Version data entries
5 entries across 5 versions & 1 rubygems