vaarg3.c

来自「linux下编程用 编译软件」· C语言 代码 · 共 28 行

// { dg-do assemble  }

// Copyright (C) 1999 Free Software Foundation, Inc.
// Contributed by Nathan Sidwell 4 Oct 1999 <[e-mail]>

// Make sure we diagnose bad uses of va_arg

#include <stdarg.h>

struct X {int m;};
struct Y : X {int m;};
struct Z;   // { dg-error "" } forward decl
void fn1(va_list args)
{
  int i = va_arg (args, int);
  Y x = va_arg (args, Y);         // { dg-warning "" } cannot receive
  Y y = va_arg (args, struct Y);  // { dg-warning "" } cannot receive
  int &r = va_arg (args, int &);  // { dg-warning "" } cannot receive
  
  Z z1 = va_arg (args, Z);        // { dg-error "" } incomplete
  const Z &z2 = va_arg (args, Z);       // { dg-error "" } incomplete

  va_arg (args, char);    // { dg-error "" } promote
  va_arg (args, int []);  // { dg-error "" } promote
  va_arg (args, int ());  // { dg-error "" } promote
  va_arg (args, bool);    // { dg-error "" } promote
}