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37 lines
965 B
C++
37 lines
965 B
C++
// Copyright 2013-2014 Antony Polukhin
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// Distributed under the Boost Software License, Version 1.0.
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// (See the accompanying file LICENSE_1_0.txt
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// or a copy at <http://www.boost.org/LICENSE_1_0.txt>.)
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//[type_index_derived_example
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/*`
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The following example shows that `type_info` is able to store the real type, successfully getting through
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all the inheritances.
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Example works with and without RTTI."
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*/
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#include <boost/type_index.hpp>
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#include <iostream>
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struct A {
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BOOST_TYPE_INDEX_REGISTER_CLASS
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virtual ~A(){}
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};
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struct B: public A { BOOST_TYPE_INDEX_REGISTER_CLASS };
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struct C: public B { BOOST_TYPE_INDEX_REGISTER_CLASS };
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void print_real_type(const A& a) {
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std::cout << boost::typeindex::type_id_runtime(a).pretty_name() << '\n';
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}
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int main() {
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C c;
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const A& c_as_a = c;
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print_real_type(c_as_a); // Outputs `struct C`
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print_real_type(B()); // Outputs `struct B`
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}
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//] [/type_index_derived_example]
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