I'm very tempted to explore a coding style in C and C++ using a more functional idiom. I think both languages could benefit greatly if made more transparently 'intensional' -- more restricted use of in:out function arguments, explicit return variables, minimal pointer arithmetic, more explicit pointer expressions, etc.

Has anyone attempted to devise a FP-style guide for non-FP languages? It could be fun to reimagine their now-antiquated idioms spoken in a more intuitive and/or legible accent.