25 lines · c
1// RUN: %clang_cc1 -fsyntax-only -verify=c2x -std=c2x %s2// RUN: %clang_cc1 -Wno-strict-prototypes -fsyntax-only -verify -std=c17 %s3// RUN: %clang_cc1 -fsyntax-only -fno-knr-functions -std=c99 -verify=c2x %s4// expected-no-diagnostics5 6void func(); // c2x-note {{'func' declared here}}7typedef void (*fp)();8 9void other_func(int i);10 11void 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 C23.20void redecl1(); // c2x-note {{previous declaration is here}}21void redecl1(int i); // c2x-error {{conflicting types for 'redecl1'}}22 23void redecl2(int i); // c2x-note {{previous declaration is here}}24void redecl2(); // c2x-error {{conflicting types for 'redecl2'}}25