clang/test/Preprocessor/macro_expand_empty.c

   1 // RUN: %clang_cc1 -E %s | FileCheck --strict-whitespace %s
   2
   3 // Check that this doesn't crash
   4
   5 #define IDENTITY1(x) x
   6 #define IDENTITY2(x) IDENTITY1(x) IDENTITY1(x) IDENTITY1(x) IDENTITY1(x)
   7 #define IDENTITY3(x) IDENTITY2(x) IDENTITY2(x) IDENTITY2(x) IDENTITY2(x)
   8 #define IDENTITY4(x) IDENTITY3(x) IDENTITY3(x) IDENTITY3(x) IDENTITY3(x)
   9 #define IDENTITY5(x) IDENTITY4(x) IDENTITY4(x) IDENTITY4(x) IDENTITY4(x)
  10 #define IDENTITY6(x) IDENTITY5(x) IDENTITY5(x) IDENTITY5(x) IDENTITY5(x)
  11 #define IDENTITY7(x) IDENTITY6(x) IDENTITY6(x) IDENTITY6(x) IDENTITY6(x)
  12 #define IDENTITY8(x) IDENTITY7(x) IDENTITY7(x) IDENTITY7(x) IDENTITY7(x)
  13 #define IDENTITY9(x) IDENTITY8(x) IDENTITY8(x) IDENTITY8(x) IDENTITY8(x)
  14 #define IDENTITY0(x) IDENTITY9(x) IDENTITY9(x) IDENTITY9(x) IDENTITY9(x)
  15 IDENTITY0()
  16
  17 #define FOO() BAR() second
  18 #define BAR()
  19 first // CHECK: {{^}}first{{$}}
  20 FOO() // CHECK: {{^}} second{{$}}
  21 third // CHECK: {{^}}third{{$}}