Add __traits(isKeyword, "...") trait.

[alexrp]

No description provided.

[dnadlinger]

Wouldn't it be possible to replace this for all practical uses by a clever library implementation using __traits(compiles, ...) and e.g. a dummy symbol?

[WalterBright]

I'm not seeing the point of this being wired into the compiler, when it can easily be done with a library function. Furthermore, I don't see the point of it existing at all. What is the compelling example?

[alexrp]

I suppose it could be implemented as a library template. The original use case for it is to avoid generating names that conflict with keywords when using mixins.