1 /*============================================================================= 2 Boost.Wave: A Standard compliant C++ preprocessor library 3 http://www.boost.org/ 4 5 Copyright (c) 2001-2012 Hartmut Kaiser. Distributed under the Boost 6 Software License, Version 1.0. (See accompanying file 7 LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 8 =============================================================================*/ 9 10 // Test partial macro evaluation using varidic macros 11 12 //O --variadics 13 14 #define cat(...) cat_i(__VA_ARGS__,,,,,) 15 #define cat_i(a, b, c, d, e, ...) \ 16 a ## b ## c ## d ## e \ 17 /**/ 18 19 #define primitive_cat(a, b) a ## b 20 21 #define partial_cat(x, y) cat(partial_cat_, x, y) 22 23 #define partial_cat_00(a, b) partial_cat_f(, ## a, b ## ,) 24 #define partial_cat_01(a, b) partial_cat_f(, ## a, b ,) 25 #define partial_cat_10(a, b) partial_cat_f(, a, b ## ,) 26 #define partial_cat_11(a, b) partial_cat_f(, a, b ,) 27 28 #define partial_cat_f(a, b, c, d) b ## c 29 30 #define X Token1 31 #define Y Token2 32 33 //R #line 34 "t_1_032.cpp" 34 partial_cat(0, 0)(X, Y) //R XY 35 partial_cat(0, 1)(X, Y) //R XToken2 36 partial_cat(1, 0)(X, Y) //R Token1Y 37 partial_cat(1, 1)(X, Y) //R Token1Token2 38