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lib/arithmetic.ex
defprotocol Infix.Arithmetic do
def left + right
def left - right
def left / right
def left * right
end
defimpl Infix.Arithmetic, for: Float do
defdelegate left + right, to: Kernel
defdelegate left - right, to: Kernel
defdelegate left / right, to: Kernel
defdelegate left * right, to: Kernel
end
defimpl Infix.Arithmetic, for: Integer do
defdelegate left + right, to: Kernel
defdelegate left - right, to: Kernel
defdelegate left / right, to: Kernel
defdelegate left * right, to: Kernel
end