clang/test/SemaCXX/vararg-class.cpp

   1 // RUN: %clang_cc1 -verify -Wclass-varargs -std=c++98 %s
   2 // RUN: %clang_cc1 -verify -Wclass-varargs -std=c++11 %s
   3
   4 struct A {};
   5 struct B { ~B(); };
   6 class C { char *c_str(); };
   7 struct D { char *c_str(); };
   8 struct E { E(); };
   9 struct F { F(); char *c_str(); };
  10
  11 void v(...);
  12 void w(const char*, ...) __attribute__((format(printf, 1, 2)));
  13
  14 void test(A a, B b, C c, D d, E e, F f) {
  15   v(a); // expected-warning-re {{passing object of class type 'A' through variadic function{{$}}}}
  16   v(b); // expected-error-re {{cannot pass object of non-{{POD|trivial}} type 'B' through variadic function; call will abort at runtime}}
  17   v(c); // expected-warning {{passing object of class type 'C' through variadic function; did you mean to call '.c_str()'?}}
  18   v(d); // expected-warning {{passing object of class type 'D' through variadic function; did you mean to call '.c_str()'?}}
  19   v(e);
  20   v(f);
  21 #if __cplusplus < 201103L
  22   // expected-error@-3 {{cannot pass object of non-POD type 'E' through variadic function; call will abort at runtime}}
  23   // expected-error@-3 {{cannot pass object of non-POD type 'F' through variadic function; call will abort at runtime}}
  24 #else
  25   // expected-warning-re@-6 {{passing object of class type 'E' through variadic function{{$}}}}
  26   // expected-warning@-6 {{passing object of class type 'F' through variadic function; did you mean to call '.c_str()'?}}
  27 #endif
  28
  29   v(d.c_str());
  30   v(f.c_str());
  31   v(0);
  32   v('x');
  33
  34   w("%s", a); // expected-warning {{format specifies type 'char *' but the argument has type 'A'}}
  35   w("%s", b); // expected-error-re {{cannot pass non-{{POD|trivial}} object of type 'B' to variadic function; expected type from format string was 'char *'}}
  36   w("%s", c); // expected-warning {{format specifies type 'char *' but the argument has type 'C'}}
  37   w("%s", d); // expected-warning {{format specifies type 'char *' but the argument has type 'D'}}
  38   w("%s", e);
  39   w("%s", f);
  40 #if __cplusplus < 201103L
  41   // expected-error@-3 {{cannot pass non-POD object of type 'E' to variadic function; expected type from format string was 'char *'}}
  42   // expected-error@-3 {{cannot pass non-POD object of type 'F' to variadic function; expected type from format string was 'char *'}}
  43   // expected-note@-4 {{did you mean to call the c_str() method?}}
  44 #else
  45   // expected-warning@-7 {{format specifies type 'char *' but the argument has type 'E'}}
  46   // expected-warning@-7 {{format specifies type 'char *' but the argument has type 'F'}}
  47 #endif
  48 }