50 lines · c
1// RUN: %clang_cc1 -triple i386-pc-unknown -Wconversion -Wliteral-conversion -fsyntax-only -verify %s2 3// C DR #316, PR 3626.4void f0(a, b, c, d) int a,b,c,d; {} // expected-warning {{a function definition without a prototype is deprecated in all versions of C and is not supported in C23}}5void t0(void) {6 f0(1); // expected-warning{{too few arguments}}7}8 9void f1(a, b) int a, b; {} // expected-warning {{a function definition without a prototype is deprecated in all versions of C and is not supported in C23}}10void t1(void) {11 f1(1, 2, 3); // expected-warning{{too many arguments}}12}13 14void f2(float); // expected-note{{previous declaration is here}}15void f2(x) float x; { } // expected-warning{{promoted type 'double' of K&R function parameter is not compatible with the parameter type 'float' declared in a previous prototype}} \16 expected-warning {{a function definition without a prototype is deprecated in all versions of C and is not supported in C23}}17 18typedef void (*f3)(void);19f3 t3(int b) { return b? f0 : f1; } // okay20 21void f4() {22 char *rindex();23}24 25// FIXME: we should diagnose this case, but when merging function declarations,26// we don't diagnose it because the function is a builtin.27char *rindex(s, c)28 register char *s, c; // expected-warning{{promoted type 'char *' of K&R function parameter is not compatible with the parameter type 'const char *' declared in a previous prototype}}29{30 return 0;31}32 33// PR831434void proto(int);35void proto(x) // expected-warning {{a function definition without a prototype is deprecated in all versions of C and is not supported in C23}}36 int x;37{38}39 40void use_proto() {41 proto(42.1); // expected-warning{{implicit conversion from 'double' to 'int' changes value from 42.1 to 42}}42 (&proto)(42.1); // expected-warning{{implicit conversion from 'double' to 'int' changes value from 42.1 to 42}}43}44 45// PR3102046void func(short d) __attribute__((cdecl)); // expected-note{{previous declaration is here}}47void __attribute__((cdecl)) func(d) // expected-warning {{a function definition without a prototype is deprecated in all versions of C and is not supported in C23}}48 short d; // expected-warning{{promoted type 'int' of K&R function parameter is not compatible with the parameter type 'short' declared in a previous prototype}}49{}50