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Add BOOST_NVP convenience macro

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This commit is contained in:
Glen Fernandes
2019-09-16 02:01:05 -04:00
parent 7cc1047ab7
commit 0591b1d855
3 changed files with 23 additions and 1 deletions
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10
doc/nvp.qbk
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@@ -54,6 +54,8 @@ template<class T>
const nvp<T> make_nvp(const char* name, T& value) noexcept; const nvp<T> make_nvp(const char* name, T& value) noexcept;
} /* boost */ } /* boost */
#define BOOST_NVP(object) ``['see below]``
``` ```
[section Constructors] [section Constructors]
@@ -86,6 +88,14 @@ noexcept;`]
[endsect] [endsect]
[section Macros]
[variablelist
[[`#define BOOST_NVP(object) see below`]
[Expands to `boost::make_nvp(BOOST_STRINGIZE(object), object)`.]]]
[endsect]
[endsect] [endsect]
[section Acknowledgments] [section Acknowledgments]

2
include/boost/core/nvp.hpp
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@@ -46,4 +46,6 @@ make_nvp(const char* n, T& v) BOOST_NOEXCEPT
} /* boost */ } /* boost */
#define BOOST_NVP(v) boost::make_nvp(BOOST_STRINGIZE(v), v)
#endif #endif

12
test/nvp_test.cpp
View File

@@ -6,7 +6,7 @@ Distributed under the Boost Software License, Version 1.0.
(http://www.boost.org/LICENSE_1_0.txt) (http://www.boost.org/LICENSE_1_0.txt)
*/ */
#include <boost/core/nvp.hpp> #include <boost/core/nvp.hpp>
#include <boost/core/lightweight_test_trait.hpp> #include <boost/core/lightweight_test.hpp>
void test() void test()
{ {
@@ -28,9 +28,19 @@ void test_factory()
BOOST_TEST_EQ(&p.value(), &v); BOOST_TEST_EQ(&p.value(), &v);
} }
void test_macro()
{
int v = 1;
boost::nvp<int> p = BOOST_NVP(v);
BOOST_TEST_CSTR_EQ(p.name(), "v");
BOOST_TEST_EQ(p.value(), 1);
BOOST_TEST_EQ(&p.value(), &v);
}
int main() int main()
{ {
test(); test();
test_factory(); test_factory();
test_macro();
return boost::report_errors(); return boost::report_errors();
} }