> As such, making
> #define accent(x)
> x##\uxxxx
>
> ill-formed
is a course of action that I think should be entertained
Agree. I can't obviously speak for all languages using combining characters, but from my point of view
such macro makes as much sense as a capitalize macro which would transform 'identifier' to 'identifieR'.
Until there is a clear use case, I'd make it ill-formed.
Yours,
-- Jean-Marc