The best course of action for Go on this front, would be to expose operator overloading of numeric operators, combined with a community expectation that this isn't to be used for anything but numeric operations.

What would be the disadvantage of using a syntactic preprocessor to accomplish the same thing? We have an API for parsing golang. What if there was a way of marking certain files to be parsed and re-written with function calls? It could be done with a file suffix, and this could be made fairly convenient.