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ef14767aec
* fix segment fault of empty stringify under C++20 * Add tests for optional comma in variadic macro call --------- Co-authored-by: Jeff Trull <edaskel@att.net>
40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
/*=============================================================================
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Boost.Wave: A Standard compliant C++ preprocessor library
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http://www.boost.org/
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Copyright (c) 2020 Jeff Trull. Distributed under the Boost
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Software License, Version 1.0. (See accompanying file
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LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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//O --c++20
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//O -Werror
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// test using __VA_ARGS__ inside __VA_OPT__
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// JET: Wave seems to inject a space after some lparens
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#define sizedvec(TYPE, NAME, SIZE, ...) std::vector<TYPE> NAME(SIZE __VA_OPT__(, __VA_ARGS__))
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//R #line 20 "t_8_004.cpp"
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//R std::vector<int> foo( 12 );
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sizedvec(int, foo, 12);
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//R #line 24 "t_8_004.cpp"
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//R std::vector<double> bar( 3 , 42.0);
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sizedvec(double, bar, 3, 42.0);
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// test omitting trailing comma when expanding a macro with both variadic and
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// non-variadic parameters where no variadic parameters are supplied
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// (allowed starting in C++20)
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#define MACRO1(x, ...) x -> __VA_ARGS__
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#define MACRO2(x, ...) #x#__VA_ARGS__
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#define MACRO3(x, ...) x##__VA_ARGS__
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//R #line 34 "t_8_004.cpp"
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MACRO1(1,) //R 1 ->
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MACRO2(1,) //R "1"""
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MACRO3(1,) //R 1
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MACRO1(1) //R 1 ->
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MACRO2(1) //R "1"""
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MACRO3(1) //R 1
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