65 lines
2.5 KiB
C++
65 lines
2.5 KiB
C++
// Copyright (C) 2010 Edward Diener
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// Use, modification and distribution are subject to the
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// Boost 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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// See http://www.boost.org/libs/config for most recent version.
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// MACRO: BOOST_NO_CXX11_VARIADIC_MACROS
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// TITLE: C++0x variadic macros unavailable
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// DESCRIPTION: The compiler does not support C++0x variadic macros
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// This is a simple test
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#define TEST_VARIADIC_MACRO_SIMPLE(avalue,...) __VA_ARGS__
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/*
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This is a more complicated test, which Steve Watanabe graciously
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supplied, when I asked if it were possible to strip the parantheses
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from a macro argument. I have changed the names somewhat to prevent
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any common clashes with other macros in the config testing suite
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by prepending to each macro name TEST_VARIADIC_MACRO_.
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You may find this test overdone and may want to remove it.
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*/
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#define TEST_VARIADIC_MACRO_CAT(x, y) TEST_VARIADIC_MACRO_CAT_I(x, y)
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#define TEST_VARIADIC_MACRO_CAT_I(x, y) x ## y
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#define TEST_VARIADIC_MACRO_APPLY(macro, args) TEST_VARIADIC_MACRO_APPLY_I(macro, args)
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#define TEST_VARIADIC_MACRO_APPLY_I(macro, args) macro args
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#define TEST_VARIADIC_MACRO_STRIP_PARENS(x) TEST_VARIADIC_MACRO_EVAL((TEST_VARIADIC_MACRO_STRIP_PARENS_I x), x)
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#define TEST_VARIADIC_MACRO_STRIP_PARENS_I(...) 1,1
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#define TEST_VARIADIC_MACRO_EVAL(test, x) TEST_VARIADIC_MACRO_EVAL_I(test, x)
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#define TEST_VARIADIC_MACRO_EVAL_I(test, x) TEST_VARIADIC_MACRO_MAYBE_STRIP_PARENS(TEST_VARIADIC_MACRO_TEST_ARITY test, x)
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#define TEST_VARIADIC_MACRO_TEST_ARITY(...) TEST_VARIADIC_MACRO_APPLY(TEST_VARIADIC_MACRO_TEST_ARITY_I, (__VA_ARGS__, 2, 1))
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#define TEST_VARIADIC_MACRO_TEST_ARITY_I(a,b,c,...) c
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#define TEST_VARIADIC_MACRO_MAYBE_STRIP_PARENS(cond, x) TEST_VARIADIC_MACRO_MAYBE_STRIP_PARENS_I(cond, x)
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#define TEST_VARIADIC_MACRO_MAYBE_STRIP_PARENS_I(cond, x) TEST_VARIADIC_MACRO_CAT(TEST_VARIADIC_MACRO_MAYBE_STRIP_PARENS_, cond)(x)
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#define TEST_VARIADIC_MACRO_MAYBE_STRIP_PARENS_1(x) x
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#define TEST_VARIADIC_MACRO_MAYBE_STRIP_PARENS_2(x) TEST_VARIADIC_MACRO_APPLY(TEST_VARIADIC_MACRO_MAYBE_STRIP_PARENS_2_I, x)
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#define TEST_VARIADIC_MACRO_MAYBE_STRIP_PARENS_2_I(...) __VA_ARGS__
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namespace boost_no_cxx11_variadic_macros {
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void quiet_warning(int){}
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template<TEST_VARIADIC_MACRO_STRIP_PARENS((typename T,int))> struct test_variadic_macro_class {};
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int test()
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{
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int x = TEST_VARIADIC_MACRO_STRIP_PARENS(3);
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quiet_warning(x);
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return 0;
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}
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}
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