llvm-project/clang/test/Misc/diag-macro-backtrace2.c
Aaron Ballman 7de7161304 Use functions with prototypes when appropriate; NFC
A significant number of our tests in C accidentally use functions
without prototypes. This patch converts the function signatures to have
a prototype for the situations where the test is not specific to K&R C
declarations. e.g.,

  void func();

becomes

  void func(void);

This is the sixth batch of tests being updated (there are a significant
number of other tests left to be updated).
2022-02-09 17:16:10 -05:00

51 lines
1.3 KiB
C

// RUN: not %clang_cc1 -fsyntax-only %s 2>&1 | FileCheck %s
#define a b
#define b c
#define c(x) d(x)
#define d(x) x*1
#define e f
#define f g
#define g(x) h(x)
#define h(x) x
void PR16799(void) {
const char str[] = "string";
a(str);
// CHECK: :15:3: error: invalid operands to binary expression
// CHECK: ('const char[7]' and 'int')
// CHECK: a(str);
// CHECK: ^~~~~~
// CHECK: :3:11: note: expanded from macro 'a'
// CHECK: #define a b
// CHECK: ^
// CHECK: :4:11: note: expanded from macro 'b'
// CHECK: #define b c
// CHECK: ^
// CHECK: :5:14: note: expanded from macro 'c'
// CHECK: #define c(x) d(x)
// CHECK: ^~~~
// CHECK: :6:15: note: expanded from macro 'd'
// CHECK: #define d(x) x*1
// CHECK: ~^~
e(str);
// CHECK: :33:5: warning: expression result unused
// CHECK: e(str);
// CHECK: ^~~
// CHECK: :8:11: note: expanded from macro 'e'
// CHECK: #define e f
// CHECK: ^
// CHECK: :9:11: note: expanded from macro 'f'
// CHECK: #define f g
// CHECK: ^
// CHECK: :10:16: note: expanded from macro 'g'
// CHECK: #define g(x) h(x)
// CHECK: ^
// CHECK: :11:14: note: expanded from macro 'h'
// CHECK: #define h(x) x
// CHECK: ^
}
// CHECK: 1 warning and 1 error generated.