clang/test/Sema/c2x-func-prototype.c

   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
  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'}}