[LLVMbugs] [Bug 20876] -Wformat should maybe allow precision for %Z

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=20876

Nico Weber <nicolasweber at gmx.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #5 from Nico Weber <nicolasweber at gmx.de> ---
#include <stdio.h>
#include <string.h>

struct ANSI_STRING {
  unsigned short len;
  unsigned short maxlen;
  char* buf;
};

int main() {
  char buf[] = "hello there";
  ANSI_STRING s = { strlen(buf), sizeof(buf), buf };
  printf("%4.4Z\n", &s);
  printf("%4.4s\n", s.buf);
}


has output


D:\src\chromefetch\src>test
hello there
hell



So precision is in fact ignored for %Z arguments. So clang's right here, and
chromium's code is incorrect.

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