[cfe-dev] failed gcc nested function

[Marshall Clow]

On Aug 21, 2012, at 7:14 AM, Shang Yu <yusunn at gmail.com> wrote:

> Hi dear all,
> The following code will fail in clang:
> 
> void f (int (*p) (void));
> void g (int i)
> {
>  int nestedfunc (void) { return i; }
>  f (nestedfunc);
> }
> 
> compile with clang -S test.c got following message
> test.c:4:24: error: expected ';' at end of declaration
>  int nestedfunc (void) { return i; }
>                       ^
>                       ;
> 1 error generated.
> but gcc -S test.c will be OK.

Clang does not support nested functions - that's a gcc language extension.

See <http://clang.llvm.org/docs/UsersManual.html#c_unsupp_gcc>, which says:

	clang does not support nested functions; this is a complex feature which is infrequently used, so it is unlikely to be implemented anytime soon. 


-- Marshall

Marshall Clow     Idio Software   <mailto:mclow.lists at gmail.com>

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