1 /* RUN: %clang_cc1 -E -verify %s
2  */
3 
4 /* expected-error@+1 {{macro name missing}} */
5 #ifdef
6 #endif
7 
8 /* expected-error@+1 {{macro name must be an identifier}} */
9 #ifdef !
10 #endif
11 
12 /* expected-error@+1 {{macro name missing}} */
13 #if defined
14 #endif
15 
16 /* PR1936 */
17 /* expected-error@+2 {{unterminated function-like macro invocation}} expected-error@+2 {{expected value in expression}} expected-note@+1 {{macro 'f' defined here}} */
18 #define f(x) x
19 #if f(2
20 #endif
21 
22 int x;
23