1 /* { dg-do preprocess }*/
2 /* { dg-options "-std=gnu99" { target c } } */
3 /* { dg-options "-std=c++2a" { target c++ } } */
4 
5 #define ERR1(x) __VA_OPT__ /* { dg-warning "__VA_OPT__ can only appear" } */
6 #define ERR2(x) __VA_OPT__( /* { dg-warning "can only appear" } */
7 #define ERR3(x) __VA_OPT__() /* { dg-warning "can only appear" } */
8 
9 #define ERR4(x,...) __VA_OPT__ /* { dg-error "unterminated __VA_OPT__" } */
10 #define ERR5(x,...) __VA_OPT__( /* { dg-error "unterminated" } */
11 #define ERR6(x,...) __VA_OPT__(() /* { dg-error "unterminated" } */
12 
13 #define ERR7(x,...) __VA_OPT__(__VA_OPT__) /* { dg-error "may not appear" } */
14 #define ERR7(x,...) __VA_OPT__(__VA_OPT__()) /* { dg-error "may not appear" } */
15 
16 #define ERR8(x, y,...) x __VA_OPT__(##) y /* { dg-error "either end" } */
17 #define ERR9(x, y,...) x __VA_OPT__(x ##) y /* { dg-error "either end" } */
18 #define ERRA(x, y,...) x x __VA_OPT__(## y) /* { dg-error "either end" } */
19 
20 #define ERRB __VA_OPT__ /* { dg-warning "can only appear" } */
21 #define ERRC(__VA_OPT__) x /* { dg-warning "can only appear" } */
22 
23 __VA_OPT__ /* { dg-warning "can only appear" } */
24 
25 #define ERRD(x)
26 ERRD(__VA_OPT__) /* { dg-warning "can only appear" } */
27 
28 #define __VA_OPT__ /* { dg-warning "can only appear" } */
29