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f87919b94b
- Define the notion of move-independence, thus relaxing the requirements on accessors. - Rename `members` to `accessors` and use `members` to get the members only - Document the different ways of providing a model - Make the model of Foldable more consistent Fixes #53
54 lines
1.6 KiB
C++
54 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/struct_macros.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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struct Person {
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BOOST_HANA_DEFINE_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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// The member names are hana::Strings:
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auto names = transform(accessors<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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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("not_a_member")) == 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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