Forced constant folding is something I use on occasion in Zig. To declare that a computation needs to happen at compile-time, just prefix it with `comptime`. C

Forced constant folding is something I use on occasion in Zig. To declare that a computation needs to happen at compile-time, just prefix it with `comptime`. Compile-time execution emulates the target architecture, which has pros and cons. The most notable con is that inline assembly isn't supported (yet?). The complete solution to this particular problem then additionally requires `return if (isComptime()) normal_code() else assembly_magic();` (which has no runtime cost because that branch is constant-folded). Given that inline assembly usually also branches on target architecture, that winds up not adding much complexity -- especially given that you probably had exactly that same code as a fallback for architectures you didn't explicitly handle.