// Test constructor body throwing (in middle branch of inheritance tree).

#include "../aux_/oteststream.hpp"
#include <boost/contract/constructor.hpp>
#include <boost/contract/base_types.hpp>
#include <boost/contract/guard.hpp>
#include <boost/detail/lightweight_test.hpp>
#include <sstream>

boost::contract::aux::test::oteststream out;

struct c
    #define BASES private boost::contract::constructor_precondition<c>
    : BASES
{
    typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
    #undef BASES

    static void static_invariant() { out << "c::static_inv" << std::endl; }
    void invariant() const { out << "c::inv" << std::endl; }

    c() :
        boost::contract::constructor_precondition<c>([&] {
            out << "c::ctor::pre" << std::endl;
        })
    {
        boost::contract::guard c = boost::contract::constructor(this)
            .old([&] { out << "c::ctor::old" << std::endl; })
            .postcondition([&] { out << "c::ctor::post" << std::endl; })
        ;
        out << "c::ctor::body" << std::endl;
        // Do not throw (from inheritance root).
    }
};

struct b
    #define BASES private boost::contract::constructor_precondition<b>, public c
    : BASES
{
    typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
    #undef BASES

    static void static_invariant() { out << "b::static_inv" << std::endl; }
    void invariant() const { out << "b::inv" << std::endl; }

    struct e {};

    b() :
        boost::contract::constructor_precondition<b>([] {
            out << "b::ctor::pre" << std::endl;
        })
    {
        boost::contract::guard c = boost::contract::constructor(this)
            .old([&] { out << "b::ctor::old" << std::endl; })
            .postcondition([&] { out << "b::ctor::post" << std::endl; })
        ;
        out << "b::ctor::body" << std::endl;
        throw b::e(); // Test body throw (from inheritance mid branch).
    }
};

struct a
    #define BASES private boost::contract::constructor_precondition<a>, public b
    : BASES
{
    typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
    #undef BASES

    static void static_invariant() { out << "a::static_inv" << std::endl; }
    void invariant() const { out << "a::inv" << std::endl; }

    a() :
        boost::contract::constructor_precondition<a>([&] {
            out << "a::ctor::pre" << std::endl;
        })
    {
        boost::contract::guard c = boost::contract::constructor(this)
            .old([&] { out << "a::ctor::old" << std::endl; })
            .postcondition([&] { out << "a::ctor::post" << std::endl; })
        ;
        out << "a::ctor::body" << std::endl;
        // Do not throw (from inheritance leaf).
    }
};

int main() {
    std::ostringstream ok;
    
    bool threw = false;
    out.str("");
    try { a aa; }
    catch(b::e const&) { threw = true; }
    BOOST_TEST(threw);
    ok.str(""); ok
        << "a::ctor::pre" << std::endl
        << "b::ctor::pre" << std::endl
        
        << "c::ctor::pre" << std::endl
        << "c::static_inv" << std::endl
        << "c::ctor::old" << std::endl
        << "c::ctor::body" << std::endl
        << "c::static_inv" << std::endl
        << "c::inv" << std::endl
        << "c::ctor::post" << std::endl
        
        << "b::static_inv" << std::endl
        << "b::ctor::old" << std::endl
        << "b::ctor::body" << std::endl
        // Test b body threw so only static inv exit checked and then C++
        // construction mechanism quits.
        << "b::static_inv" << std::endl
    ;
    BOOST_TEST(out.eq(ok.str()));
    
    return boost::report_errors();
}