clang/test/Sema/prototype-redecls.c

   1 // RUN: %clang_cc1 -fsyntax-only -Wno-strict-prototypes -verify %s
   2
   3 void blapp(int); // expected-note {{previous}}
   4 void blapp() { } // expected-error {{conflicting types for 'blapp'}}
   5
   6 void yarp(int, ...); // expected-note {{previous}}
   7 void yarp();         // expected-error {{conflicting types for 'yarp'}}
   8
   9 void blarg(int, ...); // expected-note {{previous}}
  10 void blarg() {}       // expected-error {{conflicting types for 'blarg'}}
  11
  12 void blerp(short);      // expected-note {{previous}}
  13 void blerp(x) int x; {} // expected-error {{conflicting types for 'blerp'}}
  14
  15 void foo(int); // expected-note {{previous}}
  16 void foo();
  17 void foo() {} // expected-error {{conflicting types for 'foo'}}
  18
  19 void glerp(int);
  20 void glerp(x) short x; {} // Okay, promoted type is fine
  21
  22 // All these cases are okay
  23 void derp(int);
  24 void derp(x) int x; {}
  25
  26 void garp(int);
  27 void garp();
  28 void garp(x) int x; {}
  29
  30 // Ensure redeclarations that conflict with a builtin use a note which makes it
  31 // clear that the previous declaration was a builtin.
  32 float rintf() { // expected-warning {{incompatible redeclaration of library function 'rintf'}} \
  33                    expected-note {{'rintf' is a builtin with type 'float (float)'}}
  34   return 1.0f;
  35 }