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Contents
# encoding: utf-8
# frozen_string_literal: true
module Carbon
module Core
module Integer
# Defines signage functions. This can be used to determine if an integer
# is signed or unsigned. This defines the following functions on all
# integers except boolean:
#
# - `.signed?(): Carbon::Boolean`
# - `.signed?(self): Carbon::Boolean`
# - `.unsigned?(): Carbon::Boolean`
# - `.unsigned?(self): Carbon::Boolean`
#
# @api private
module Sign
# Defines the sign functions on the given integer. This produces the
# four variants of the sign functions: signed vs. unsigned, and
# no vs. one parameter.
#
# @param int [Core::Int] The (receiver) value.
# @return [void]
def define_sign_functions(int)
params = [[], [int.name]]
signs = [:signed, :unsigned]
params.product(signs).each do |(param, sign)|
define_sign_function(int, sign, param)
end
end
# Defines a sign function. If the integer is the same sign as the
# given sign, the defined function returns `true`; otherwise, it
# returns `false`.
#
# @param int [Core::Int] The (receiver) value.
# @param sign [::Symbol] The sign function to define.
# @param args [<Concrete::Type>] The arguments that the function
# takes. These are ignored.
def define_sign_function(int, sign, args)
function_name = int.name.call("#{sign}?", args)
Core.define(function: function_name) do |function|
function[:return] = Carbon::Boolean
function[:definition].add("entry").build do |b|
int.sign == sign ? b.ret(1) : b.ret(0)
end
end
end
end
end
end
end
Version data entries
4 entries across 4 versions & 1 rubygems