t_1_031.cpp

C++的一个好库。。。现在很流行

/*=============================================================================
    Boost.Wave: A Standard compliant C++ preprocessor library
    http://www.boost.org/

    Copyright (c) 2001-2005 Hartmut Kaiser. Distributed under the Boost
    Software License, Version 1.0. (See accompanying file
    LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/

// Tests macro expansion using variadic macros

//O --variadics

#define is_empty(...) is_empty_ ## __VA_ARGS__ ## other

//R #line 17 "t_1_031.cpp"
is_empty( + )     //R is_empty_+other 
is_empty( +text ) //R is_empty_+textother