1 // RUN: %clang_cc1 -fsyntax-only -verify=c2x -std=c2x %s
2 // RUN: %clang_cc1 -Wno-strict-prototypes -fsyntax-only -verify -std=c17 %s
3 // RUN: %clang_cc1 -fsyntax-only -fno-knr-functions -std=c99 -verify=c2x %s
4 // expected-no-diagnostics
5
6 void func(); // c2x-note {{'func' declared here}}
7 typedef void (*fp)();
8
9 void other_func(int i);
10
call(void)11 void call(void) {
12 func(1, 2, 3); // c2x-error {{too many arguments to function call, expected 0, have 3}}
13 fp call_me = func;
14 call_me(1, 2, 3); // c2x-error {{too many arguments to function call, expected 0, have 3}}
15
16 fp nope = other_func; // c2x-error {{incompatible function pointer types initializing 'fp' (aka 'void (*)(void)') with an expression of type 'void (int)'}}
17 }
18
19 // Ensure these function declarations do not merge in C23.
20 void redecl1(); // c2x-note {{previous declaration is here}}
21 void redecl1(int i); // c2x-error {{conflicting types for 'redecl1'}}
22
23 void redecl2(int i); // c2x-note {{previous declaration is here}}
24 void redecl2(); // c2x-error {{conflicting types for 'redecl2'}}
25