Re: [Tinycc-devel] C99 token pasting

[Thomas Preud'homme]

Hi Jay,

On April 1, 2014 5:22:55 PM GMT+08:00, Jay Foad <address@hidden> wrote:
> C99 specifies the behaviour of token pasting when either (or both) of
> the arguments to be pasted expand to an empty sequence of tokens. tcc
> doesn't seem to implement this:
> 
> $ cat p.c
> #define P(A,B) A ## B bob
> #define Q(A,B) A ## B+
> P(jim,)
> Q(+,)
> $ ./tcc -E p.c
> # 2 "p.c"
> p.c:3: warning: pasting "jim" and " " does not give a valid
> preprocessing token
> 
> jim bob
> ++
> 
> In the P() example, the warning is inappropriate.
> In the Q() example, the result is wrong. We should get + and + as two
> separate tokens, not the single token ++.

Fixed in mob.

Cheers,

Thomas