clang/test/Preprocessor/macro_fn.c

   1 /* RUN: %clang_cc1 %s -Eonly -std=c89 -pedantic -verify
   2 */
   3 /* PR3937 */
   4 #define zero() 0 /* expected-note 2 {{defined here}} */
   5 #define one(x) 0 /* expected-note 2 {{defined here}} */
   6 #define two(x, y) 0 /* expected-note 4 {{defined here}} */
   7 #define zero_dot(...) 0   /* expected-warning {{variadic macros are a C99 feature}} */
   8 #define one_dot(x, ...) 0 /* expected-warning {{variadic macros are a C99 feature}} expected-note 2{{macro 'one_dot' defined here}} */
   9
  10 zero()
  11 zero(1);          /* expected-error {{too many arguments provided to function-like macro invocation}} */
  12 zero(1, 2, 3);    /* expected-error {{too many arguments provided to function-like macro invocation}} */
  13
  14 one()   /* ok */
  15 one(a)
  16 one(a,)           /* expected-error {{too many arguments provided to function-like macro invocation}} \
  17                      expected-warning {{empty macro arguments are a C99 feature}}*/
  18 one(a, b)         /* expected-error {{too many arguments provided to function-like macro invocation}} */
  19
  20 two()       /* expected-error {{too few arguments provided to function-like macro invocation}} */
  21 two(a)      /* expected-error {{too few arguments provided to function-like macro invocation}} */
  22 two(a,b)
  23 two(a, )    /* expected-warning {{empty macro arguments are a C99 feature}} */
  24 two(a,b,c)  /* expected-error {{too many arguments provided to function-like macro invocation}} */
  25 two(
  26     ,     /* expected-warning {{empty macro arguments are a C99 feature}} */
  27     ,     /* expected-warning {{empty macro arguments are a C99 feature}}  \
  28              expected-error {{too many arguments provided to function-like macro invocation}} */
  29     )     /* expected-warning {{empty macro arguments are a C99 feature}} */
  30 two(,)      /* expected-warning 2 {{empty macro arguments are a C99 feature}} */
  31
  32
  33
  34 /* PR4006 */
  35 #define e(...) __VA_ARGS__  /* expected-warning {{variadic macros are a C99 feature}} */
  36 e(x)
  37 e()
  38
  39 zero_dot()
  40 one_dot(x)  /* empty ... argument: expected-warning {{must specify at least one argument for '...' parameter of variadic macro}}  */
  41 one_dot()   /* empty first argument, elided ...: expected-warning {{must specify at least one argument for '...' parameter of variadic macro}} */
  42
  43
  44 /* Crash with function-like macro test at end of directive. */
  45 #define E() (i == 0)
  46 #if E
  47 #endif
  48
  49
  50 #define NSAssert(condition, desc, ...) /* expected-warning {{variadic macros are a C99 feature}} */ \
  51     SomeComplicatedStuff((desc), ##__VA_ARGS__) /* expected-warning {{token pasting of ',' and __VA_ARGS__ is a GNU extension}} */
  52 NSAssert(somecond, somedesc)