clang/test/SemaCXX/format-strings-0x.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify -pedantic -std=c++11 %s
   2
   3 extern "C" {
   4 extern int scanf(const char *restrict, ...);
   5 extern int printf(const char *restrict, ...);
   6 }
   7
   8 void f(char **sp, float *fp) {
   9   scanf("%as", sp); // expected-warning{{format specifies type 'float *' but the argument has type 'char **'}}
  10
  11   printf("%p", sp); // expected-warning{{format specifies type 'void *' but the argument has type 'char **'}}
  12   scanf("%p", sp);  // expected-warning{{format specifies type 'void **' but the argument has type 'char **'}}
  13
  14   printf("%a", 1.0);
  15   scanf("%afoobar", fp);
  16   printf(nullptr);
  17   printf(*sp); // expected-warning {{not a string literal}}
  18   // expected-note@-1{{treat the string as an argument to avoid this}}
  19
  20   // PR13099
  21   printf(
  22     R"foobar(%)foobar"
  23     R"bazquux(d)bazquux" // expected-warning {{more '%' conversions than data arguments}}
  24     R"xyzzy()xyzzy");
  25
  26   printf(u8"this is %d test", 0); // ok
  27   printf(u8R"foo(
  28       \u1234\U0010fffe
  29       %d)foo" // expected-warning {{more '%' conversions than data arguments}}
  30   );
  31
  32   printf("init list: %d", { 0 }); // expected-error {{cannot pass initializer list to variadic function; expected type from format string was 'int'}}
  33   printf("void: %d", f(sp, fp)); // expected-error {{cannot pass expression of type 'void' to variadic function; expected type from format string was 'int'}}
  34   printf(0, { 0 }); // expected-error {{cannot pass initializer list to variadic function}}
  35 }