Zrp200/linear1

require "linear1/function"
module Linear1
    class SlopeIntercept < Function
        def self.try_convert obj
            for converter in %i[to_slope_intercept to_si]
                return obj.public_send converter if obj.respond_to? converter
            end
            fail TypeError, "Could not convert #{obj} to SlopeIntercept"
        end
        def initialize(slope, y_intercept)
            super
        end
        def to_s
            super.sub "f(x)", "y"
        end
        def to_ps
            require "linear1/point_slope"
            PointSlope(0, @y_intercept, @slope)
        end
        alias to_point_slope to_ps
        def to_sf
            require "linear1/standard"
            Standard.new(@slope, -1, -@y_intercept)
        end
    end
    module_function; def SlopeIntercept(*args) # @see SlopeIntercept.new, SlopeIntercept.try_convert
        case args.length
            when 1 then SlopeIntercept.try_convert *args
            when 2 then SlopeIntercept.new *args
        else fail ArgumentError, "Expected 1..2 arguments. Got #{args.length}" end
    end
end