llvm-project/clang/test/Sema/struct-compat.c
Aaron Ballman 22db4824b9 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 third batch of tests being updated (there are a significant
number of other tests left to be updated).
2022-02-07 09:25:01 -05:00

18 lines
627 B
C

/* RUN: %clang_cc1 %s -fsyntax-only -pedantic -verify
*/
extern struct {int a;} x; // expected-note {{previous declaration is here}}
extern struct {int a;} x; // expected-error {{redeclaration of 'x'}}
struct x;
int a(struct x* b) {
// Per C99 6.7.2.3, since the outer and inner "struct x"es have different
// scopes, they don't refer to the same type, and are therefore incompatible
struct x {int a;} *c = b; // expected-warning {{incompatible pointer types}}
}
struct x {int a;} r;
int b(void) {
struct x {char x;} s = r; // expected-error {{initializing 'struct x' with an expression of incompatible type 'struct x'}}
}