clang/test/SemaCXX/warn-missing-prototypes.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify -Wmissing-prototypes -std=c++11 %s
   2 // RUN: %clang_cc1 -fsyntax-only -Wmissing-prototypes -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
   3
   4 void f() { } // expected-warning {{no previous prototype for function 'f'}}
   5 // expected-note@-1{{declare 'static' if the function is not intended to be used outside of this translation unit}}
   6 // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:1-[[@LINE-2]]:1}:"static "
   7
   8 namespace NS {
   9   void f() { } // expected-warning {{no previous prototype for function 'f'}}
  10   // expected-note@-1{{declare 'static' if the function is not intended to be used outside of this translation unit}}
  11 }
  12
  13 namespace {
  14   // Don't warn about functions in anonymous namespaces.
  15   void f() { }
  16   // Even if they're in nested namespaces within an anonymous namespace.
  17   namespace NS {
  18     void f() { }
  19   }
  20 }
  21
  22 struct A {
  23   // Don't warn about member functions.
  24   void f() { }
  25 };
  26
  27 // Don't warn about inline functions.
  28 inline void g() { }
  29
  30 // Don't warn about function templates.
  31 template<typename> void h() { }
  32
  33 // Don't warn when instantiating function templates.
  34 template void h<int>();
  35
  36 // PR9519: don't warn about friend functions.
  37 class I {
  38   friend void I_friend() {}
  39 };
  40
  41 // Don't warn on explicitly deleted functions.
  42 void j() = delete;
  43
  44 extern void k() {} // expected-warning {{no previous prototype for function 'k'}}
  45 // expected-note@-1{{declare 'static' if the function is not intended to be used outside of this translation unit}}
  46 // CHECK-NOT: fix-it:"{{.*}}":{[[@LINE-2]]:{{.*}}-[[@LINE-2]]:{{.*}}}:"{{.*}}"
  47
  48 namespace {
  49 struct anon { };
  50 }
  51
  52 // No warning because this has internal linkage despite not being declared
  53 // explicitly 'static', owing to the internal linkage parameter.
  54 void l(anon) {
  55 }
  56
  57 void *operator new(decltype(sizeof(3)) size, const anon &) throw() {
  58   return nullptr;
  59 }