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Versions: 5
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Contents
module BloodContracts::Core
# Meta refinement type, represents contract built upon input and output
# types
class Contract
class << self
# Metaprogramming around constructor
# Turns input types into a contract
#
# @param [Hash<BC::Refined, BC::Refined>] expectations about possible
# data input expressed in form of BC::Refined types
# @return [BC::Refined] contract for data validation in form of
# BC::Refined class
#
def new(*args)
input, output =
if (opts = args.last).is_a?(Hash)
accumulate_contract(opts)
else
_validate_args!(args)
args
end
BC::Pipe.new(input, output, names: %i[input output])
end
# @private
private def _validate_args!(args)
return if args.size == 2
raise ArgumentError, <<~MESSAGE
wrong number of arguments (given #{args.size}, expected 2)
MESSAGE
end
# @private
private def accumulate_contract(options)
accumulate_contract = options.reduce({}) do |acc, (input, output)|
prev_input, prev_output = acc.first
{ (input | prev_input) => (output | prev_output) }
end
accumulate_contract.first
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems