clang/test/Preprocessor/macro_vaopt_check.cpp

   1 // RUN: %clang_cc1 %s -Eonly -verify -Wno-all -pedantic -std=c++2a
   2
   3 //expected-error@+1{{missing '('}}
   4 #define V1(...) __VA_OPT__
   5 #undef V1
   6 // OK
   7 #define V1(...) __VA_OPT__  ()
   8 #undef V1
   9
  10 //expected-warning@+1{{can only appear in the expansion of a variadic macro}}
  11 #define V2() __VA_OPT__(x)
  12 #undef V2
  13
  14 //expected-error@+2{{missing ')' after}}
  15 //expected-note@+1{{to match this '('}}
  16 #define V3(...) __VA_OPT__(
  17 #undef V3
  18
  19 #define V4(...) __VA_OPT__(__VA_ARGS__)
  20 #undef V4
  21
  22 //expected-error@+1{{nested}}
  23 #define V5(...) __VA_OPT__(__VA_OPT__())
  24 #undef V5
  25
  26 //expected-error@+1{{not followed by}}
  27 #define V1(...) __VA_OPT__  (#)
  28 #undef V1
  29
  30 //expected-error@+1{{cannot appear at start}}
  31 #define V1(...) __VA_OPT__  (##)
  32 #undef V1
  33
  34 //expected-error@+1{{cannot appear at start}}
  35 #define V1(...) __VA_OPT__  (## X) x
  36 #undef V1
  37
  38 //expected-error@+1{{cannot appear at end}}
  39 #define V1(...) y __VA_OPT__  (X ##)
  40 #undef V1
  41
  42
  43 #define FOO(x,...) # __VA_OPT__(x) #x #__VA_OPT__(__VA_ARGS__) //OK
  44
  45 //expected-error@+1{{not followed by a macro parameter}}
  46 #define V1(...) __VA_OPT__(#)
  47 #undef V1
  48
  49 //expected-error@+1{{cannot appear at start}}
  50 #define V1(...) a __VA_OPT__(##) b
  51 #undef V1
  52
  53 //expected-error@+1{{cannot appear at start}}
  54 #define V1(...) a __VA_OPT__(a ## b) b __VA_OPT__(##)
  55 #undef V1
  56
  57 #define V1(x,...) # __VA_OPT__(b x) // OK
  58 #undef V1
  59
  60 //expected-error@+2{{missing ')' after}}
  61 //expected-note@+1{{to match this '('}}
  62 #define V1(...) __VA_OPT__  ((())
  63 #undef V1
  64