gcc/testsuite/g++.dg/cpp26/stdarg6.C

// P3348R4 - C++26 should refer to C23 not C17
// { dg-do compile { target c++26 } }
// { dg-additional-options "-O2" }

#include <stdarg.h>

int i;

void
f0 (...)
{
  va_list ap;
  va_start (ap);
  va_end (ap);
}

void
f1 (...)
{
  va_list ap;
  va_start (ap, i);				// { dg-warning "optional second parameter of 'va_start' not last named argument" }
  va_end (ap);
}

void
f2 (...)
{
  int j = 0;
  va_list ap;
  va_start (ap, j);				// { dg-warning "optional second parameter of 'va_start' not last named argument" }
  va_end (ap);
}

void
f3 (int k, int l, ...)
{
  va_list ap;
  va_start (ap, k);				// { dg-warning "optional second parameter of 'va_start' not last named argument" }
  va_end (ap);
}

void
f4 (int k, int l, ...)
{
  va_list ap;
  va_start (ap, l);
  va_end (ap);
}

void
f5 (int k, int l, ...)
{
  va_list ap;
  va_start (ap, (int) l);			// { dg-warning "'va_start' macro used with additional arguments other than identifier of the last named argument" }
  va_end (ap);
}

void
f6 (int k, int l, ...)
{
  va_list ap;
  va_start (ap, l + 0);				// { dg-warning "'va_start' macro used with additional arguments other than identifier of the last named argument" }
  va_end (ap);
}

void
f7 (int k, int l, ...)
{
  va_list ap;
  va_start (ap, ()()(), [][][], {}{}{}, *+-/1({[_*_]})%&&!?!?);	// { dg-warning "'va_start' macro used with additional arguments other than identifier of the last named argument" }
  va_end (ap);
}

void
f8 (...)
{
  va_list ap;
  va_start (ap,);				// { dg-warning "'va_start' macro used with additional arguments other than identifier of the last named argument" }
  va_end (ap);
}

void
f9 (int k, int l, ...)
{
  va_list ap;
  va_start (ap, k+l+****2);			// { dg-warning "'va_start' macro used with additional arguments other than identifier of the last named argument" }
  va_end (ap);
}

void
f10 (int m, ...)
{
  va_list ap;
  va_start (ap, m);
  va_end (ap);
}

void
f11 (int k, int l, ...)
{
  va_list ap;
  va_start (ap, ()()()[[[}}});			// { dg-warning "'va_start' macro used with additional arguments other than identifier of the last named argument" }
  va_end (ap);
}

void
f12 (int k, int l, ...)
{
  va_list ap;
  va_start (ap, ]]]]]]{{{{{{);			// { dg-warning "'va_start' macro used with additional arguments other than identifier of the last named argument" }
  va_end (ap);
}