can pass half parentheses as macro agument?

[password636]

Hi,

Is there any way to pass a left parenthese or right parenthese as an argument to a function-like macro?

Thanks,

[std10093]

You can pass it in a normal function as a char or as it's ascci code --> '('

[password636]

thank you. I'm just curious when I read about cpp macro seems no way to implement that.

[dmh2000]

if this is what you want, it is possible with a trick. this seems to work. if you just put a literal non-string ) as the argument to M, the parser sees it as a closing paren and pukes. But if you do it with the #define P then that all gets substituted in before being parsed.

#define P )
#define M(a) f(a

void f(void)
{
}

int main(int argc,char *argv[])
{
	M(P);
	return 0;
}

the Visual C preprocessor outputs this

C:\home\dh0072\x\x1>cl /E x1.c
Microsoft (R) C/C++ Optimizing Compiler Version 17.00.50727.1 for x64
Copyright (C) Microsoft Corporation.  All rights reserved.

x1.c
#line 1 "x1.c"



void f(void)
{
}

int main(int argc,char *argv[])
{
        f();
        return 0;
}

[password636]

@dmh2000, yes, great, that does the trick!

[phantomotap]

O_o

What are you trying to do?

Soma