• bobef (9/9) Apr 23 2004 imagine this case:
• Norbert Nemec (5/17) Apr 23 2004 There are lots of thing that cannot be done without preprocessor. The
• Carlos Santander B. (16/25) Apr 23 2004 Have the user write this:

bobef <bobef_member pathlink.com> writes:

imagine this case:

#define entry(myappclass) int main(int argc,char **argv){app=new
myappclass;return my_main(argc,argv);}

i'm doing a class library and i don't want user to make main function
it seems to me it is impossible without a #define

templates need to be created somewhre (main)
alises work only for data types
and it is not good to do it in the constructor of [myappclass]
because all global objects need to be constructed first...

Norbert Nemec <Norbert.Nemec gmx.de> writes:

There are lots of thing that cannot be done without preprocessor. The
question is, whether they really *need* to be done. Why make a hassle over
three lines that users have to write? Anyone using D expects to write a
main routine anyway.


bobef wrote:

 imagine this case:
 
 #define entry(myappclass) int main(int argc,char **argv){app=new
 myappclass;return my_main(argc,argv);}
 
 i'm doing a class library and i don't want user to make main function
 it seems to me it is impossible without a #define
 
 templates need to be created somewhre (main)
 alises work only for data types
 and it is not good to do it in the constructor of [myappclass]
 because all global objects need to be constructed first...

Carlos Santander B. <Carlos_member pathlink.com> writes:

In article <c6buno$1tae$1 digitaldaemon.com>, bobef says...
imagine this case:

#define entry(myappclass) int main(int argc,char **argv){app=new
myappclass;return my_main(argc,argv);}

i'm doing a class library and i don't want user to make main function
it seems to me it is impossible without a #define

templates need to be created somewhre (main)
alises work only for data types
and it is not good to do it in the constructor of [myappclass]
because all global objects need to be constructed first...

Have the user write this:

static this() {
entry!(SomeClass)();
}

And define somewhere else:

template entry (T) {
void entry() {
app=new T;
}
}

int main(char [][] args) { return my_main(args); }

Although I bet that main could be replaced by whatever my_main does. BTW, I
didn't test the code.

-------------------
Carlos Santander B.