typename2.c

来自「gcc-you can use this code to learn somet」· C语言 代码 · 共 26 行

// { dg-do compile }
// { dg-options "" }

// Copyright (C) 2001 Free Software Foundation, Inc.
// Contributed by Nathan Sidwell 21 Mar 2002 <[e-mail]>

// PR 5507. Overzealous implicit typename warning

template<typename _CharT>
class __ctype_abstract_base
{
  typedef int mask;
};

template<typename _CharT>
class ctype : public __ctype_abstract_base<_CharT>
{
  typedef typename ctype::mask mask;
};

template<typename _CharT>
class ctype2 : public __ctype_abstract_base<_CharT>
{
  typedef mask mask; // { dg-warning "(implicitly a typename)|(implicit typename)" "" }
};