I really like the idea of using GMP to do the math. Does it make sense to restrict ourselves to integer only? Probably, but just a thought. Could always introduce it later. Yes there is the question of use case and YAGNI, but there's also the case of why artificially restrict the abilities of $(expr).
Assuming we at least do GMP with integers, I want to know the operators that we should support. I propose: Arithmetic Functions: --------------------------- * add * subtract * multiply * divide * negate * absolute value * exponentiate Bit Manipulation: ---------------------- * and * or * xor * complement * left shift * right shift Comparison Functions: ------------------------------ * > * >= * < * <= * == If this looks ok then I can proceed with making a proposal document. I can format it to resemble a Make documentation page.
