On May 5, 2005, at 11:51 AM, Giovanni P. Deretta wrote:
Angus Leeming wrote:
FYI, Wave has a special #pragma usable for bridging this gap:
#pragma wave system(any OS command)
which spawns of the given command and intercepts the produced stdout stream, inserting it instead of the pragma itself :-P. In C99 mode you even may use it from the operator _Pragma and force a full macro expansion of the inserted results:
#define EVAL(x) x EVAL(_Pragma("wave system(any OS command)"))
Regards Hartmut Hartmut, is that a good idea? I can imagine that running an existing executable might cause untold damage to my system, but compiling a
Hartmut Kaiser wrote: piece of source code? Doesn't it smack of C++ source code as computer virus?
Well, technically, being templates turing complete we are in trouble anyway ...
Sorry couldn't resist :)
A program running on a Turing machine can only affect the tape of the machine. The "tape" of a template metaprogram is quite well isolated from other parts of a computer system. (OTOH, templates never cease to surprise...) Jaakko