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35cdf3b83a
This is done because the resulting macros are much more straightforward to debug when a user makes a mistake. Also, it avoids pulling yet another dependency. Also added some general purpose macros in detail/preprocessor.hpp.
58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
/*
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@copyright Louis Dionne 2015
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/hana/assert.hpp>
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#include <boost/hana/integral_constant.hpp>
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#include <boost/hana/map.hpp>
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#include <boost/hana/pair.hpp>
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#include <boost/hana/string.hpp>
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#include <boost/hana/struct.hpp>
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#include <boost/hana/tuple.hpp>
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#include <string>
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using namespace boost::hana;
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//! [main]
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namespace ns {
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struct Person {
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std::string name;
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int age;
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};
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}
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BOOST_HANA_ADAPT_STRUCT(ns::Person,
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(std::string, name),
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(int, age)
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);
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// The member names are hana::Strings:
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auto names = transform(accessors<ns::Person>(), first);
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BOOST_HANA_CONSTANT_CHECK(
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names == make_tuple(BOOST_HANA_STRING("name"), BOOST_HANA_STRING("age"))
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);
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int main() {
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ns::Person john{"John", 30}, bob{"Bob", 40};
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BOOST_HANA_RUNTIME_CHECK(equal(john, john));
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BOOST_HANA_RUNTIME_CHECK(not_equal(john, bob));
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BOOST_HANA_RUNTIME_CHECK(find(john, BOOST_HANA_STRING("name")) == just("John"));
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BOOST_HANA_RUNTIME_CHECK(find(john, BOOST_HANA_STRING("age")) == just(30));
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BOOST_HANA_CONSTANT_CHECK(find(john, BOOST_HANA_STRING("foo")) == nothing);
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BOOST_HANA_RUNTIME_CHECK(to<Tuple>(john) == make<Tuple>(
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make<Pair>(BOOST_HANA_STRING("name"), "John"),
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make<Pair>(BOOST_HANA_STRING("age"), 30)
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));
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BOOST_HANA_RUNTIME_CHECK(to<Map>(john) == make<Map>(
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make<Pair>(BOOST_HANA_STRING("name"), "John"),
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make<Pair>(BOOST_HANA_STRING("age"), 30)
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));
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}
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//! [main]
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