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// Copyright (C) 2014 - 2015 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/lib/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
#include "boost/optional/optional.hpp"
#ifdef BOOST_BORLANDC
#pragma hdrstop
#endif
#include "boost/core/lightweight_test.hpp"
using boost::optional;
using boost::none;
//#ifndef BOOST_OPTIONAL_NO_CONVERTING_ASSIGNMENT
//#ifndef BOOST_OPTIONAL_NO_CONVERTING_COPY_CTOR
#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
enum State
{
sDefaultConstructed,
sValueCopyConstructed,
sValueMoveConstructed,
sCopyConstructed,
sMoveConstructed,
sMoveAssigned,
sCopyAssigned,
sValueCopyAssigned,
sValueMoveAssigned,
sMovedFrom,
sIntConstructed
};
struct OracleVal
{
State s;
int i;
OracleVal(int i = 0) : s(sIntConstructed), i(i) {}
};
struct Oracle
{
State s;
OracleVal val;
Oracle() : s(sDefaultConstructed) {}
Oracle(const OracleVal& v) : s(sValueCopyConstructed), val(v) {}
Oracle(OracleVal&& v) : s(sValueMoveConstructed), val(std::move(v)) {v.s = sMovedFrom;}
Oracle(const Oracle& o) : s(sCopyConstructed), val(o.val) {}
Oracle(Oracle&& o) : s(sMoveConstructed), val(std::move(o.val)) {o.s = sMovedFrom;}
Oracle& operator=(const OracleVal& v) { s = sValueCopyAssigned; val = v; return *this; }
Oracle& operator=(OracleVal&& v) { s = sValueMoveAssigned; val = std::move(v); v.s = sMovedFrom; return *this; }
Oracle& operator=(const Oracle& o) { s = sCopyAssigned; val = o.val; return *this; }
Oracle& operator=(Oracle&& o) { s = sMoveAssigned; val = std::move(o.val); o.s = sMovedFrom; return *this; }
};
bool operator==( Oracle const& a, Oracle const& b ) { return a.val.i == b.val.i; }
bool operator!=( Oracle const& a, Oracle const& b ) { return a.val.i != b.val.i; }
void test_move_ctor_from_U()
{
optional<Oracle> o1 ((OracleVal()));
BOOST_TEST(o1);
BOOST_TEST(o1->s == sValueMoveConstructed || o1->s == sMoveConstructed);
OracleVal v1;
optional<Oracle> o2 (v1);
BOOST_TEST(o2);
BOOST_TEST(o2->s == sValueCopyConstructed || o2->s == sCopyConstructed || o2->s == sMoveConstructed );
BOOST_TEST(v1.s == sIntConstructed);
optional<Oracle> o3 (boost::move(v1));
BOOST_TEST(o3);
BOOST_TEST(o3->s == sValueMoveConstructed || o3->s == sMoveConstructed);
BOOST_TEST(v1.s == sMovedFrom);
}
void test_move_ctor_form_T()
{
optional<Oracle> o1 ((Oracle()));
BOOST_TEST(o1);
BOOST_TEST(o1->s == sMoveConstructed);
Oracle v1;
optional<Oracle> o2 (v1);
BOOST_TEST(o2);
BOOST_TEST(o2->s == sCopyConstructed);
BOOST_TEST(v1.s == sDefaultConstructed);
optional<Oracle> o3 (boost::move(v1));
BOOST_TEST(o3);
BOOST_TEST(o3->s == sMoveConstructed);
BOOST_TEST(v1.s == sMovedFrom);
}
void test_move_ctor_from_optional_T()
{
optional<Oracle> o1;
optional<Oracle> o2(boost::move(o1));
BOOST_TEST(!o1);
BOOST_TEST(!o2);
optional<Oracle> o3((Oracle()));
optional<Oracle> o4(boost::move(o3));
BOOST_TEST(o3);
BOOST_TEST(o4);
BOOST_TEST(o3->s == sMovedFrom);
BOOST_TEST(o4->s == sMoveConstructed);
optional<Oracle> o5((optional<Oracle>()));
BOOST_TEST(!o5);
optional<Oracle> o6((optional<Oracle>(Oracle())));
BOOST_TEST(o6);
BOOST_TEST(o6->s == sMoveConstructed);
optional<Oracle> o7(o6); // does copy ctor from non-const lvalue compile?
}
void test_move_assign_from_U()
{
optional<Oracle> o1 = boost::none; // test if additional ctors didn't break it
o1 = boost::none; // test if additional assignments didn't break it
o1 = OracleVal();
BOOST_TEST(o1);
BOOST_TEST(o1->s == sValueMoveConstructed);
o1 = OracleVal();
BOOST_TEST(o1);
BOOST_TEST(o1->s == sMoveAssigned);
OracleVal v1;
optional<Oracle> o2;
o2 = v1;
BOOST_TEST(o2);
BOOST_TEST(o2->s == sValueCopyConstructed);
BOOST_TEST(v1.s == sIntConstructed);
o2 = v1;
BOOST_TEST(o2);
BOOST_TEST(o2->s == sCopyAssigned || o2->s == sMoveAssigned);
BOOST_TEST(v1.s == sIntConstructed);
optional<Oracle> o3;
o3 = boost::move(v1);
BOOST_TEST(o3);
BOOST_TEST(o3->s == sValueMoveConstructed);
BOOST_TEST(v1.s == sMovedFrom);
}
void test_move_assign_from_T()
{
optional<Oracle> o1;
o1 = Oracle();
BOOST_TEST(o1);
BOOST_TEST(o1->s == sMoveConstructed);
o1 = Oracle();
BOOST_TEST(o1);
BOOST_TEST(o1->s == sMoveAssigned);
Oracle v1;
optional<Oracle> o2;
o2 = v1;
BOOST_TEST(o2);
BOOST_TEST(o2->s == sCopyConstructed);
BOOST_TEST(v1.s == sDefaultConstructed);
o2 = v1;
BOOST_TEST(o2);
BOOST_TEST(o2->s == sCopyAssigned);
BOOST_TEST(v1.s == sDefaultConstructed);
optional<Oracle> o3;
o3 = boost::move(v1);
BOOST_TEST(o3);
BOOST_TEST(o3->s == sMoveConstructed);
BOOST_TEST(v1.s == sMovedFrom);
}
void test_move_assign_from_optional_T()
{
optional<Oracle> o1;
optional<Oracle> o2;
o1 = optional<Oracle>();
BOOST_TEST(!o1);
optional<Oracle> o3((Oracle()));
o1 = o3;
BOOST_TEST(o3);
BOOST_TEST(o3->s == sMoveConstructed);
BOOST_TEST(o1);
BOOST_TEST(o1->s == sCopyConstructed);
o2 = boost::move(o3);
BOOST_TEST(o3);
BOOST_TEST(o3->s == sMovedFrom);
BOOST_TEST(o2);
BOOST_TEST(o2->s == sMoveConstructed);
o2 = optional<Oracle>((Oracle()));
BOOST_TEST(o2);
BOOST_TEST(o2->s == sMoveAssigned);
}
class MoveOnly
{
public:
int val;
MoveOnly(int v) : val(v) {}
MoveOnly(MoveOnly&& rhs) : val(rhs.val) { rhs.val = 0; }
void operator=(MoveOnly&& rhs) {val = rhs.val; rhs.val = 0; }
private:
MoveOnly(MoveOnly const&);
void operator=(MoveOnly const&);
friend class MoveOnlyB;
};
void test_with_move_only()
{
optional<MoveOnly> o1;
optional<MoveOnly> o2((MoveOnly(1)));
BOOST_TEST(o2);
BOOST_TEST(o2->val == 1);
optional<MoveOnly> o3 (boost::move(o1));
BOOST_TEST(!o3);
optional<MoveOnly> o4 (boost::move(o2));
BOOST_TEST(o4);
BOOST_TEST(o4->val == 1);
BOOST_TEST(o2);
BOOST_TEST(o2->val == 0);
o3 = boost::move(o4);
BOOST_TEST(o3);
BOOST_TEST(o3->val == 1);
BOOST_TEST(o4);
BOOST_TEST(o4->val == 0);
}
class MoveOnlyB
{
public:
int val;
MoveOnlyB(int v) : val(v) {}
MoveOnlyB(MoveOnlyB&& rhs) : val(rhs.val) { rhs.val = 0; }
void operator=(MoveOnlyB&& rhs) {val = rhs.val; rhs.val = 0; }
MoveOnlyB(MoveOnly&& rhs) : val(rhs.val) { rhs.val = 0; }
void operator=(MoveOnly&& rhs) {val = rhs.val; rhs.val = 0; }
private:
MoveOnlyB(MoveOnlyB const&);
void operator=(MoveOnlyB const&);
MoveOnlyB(MoveOnly const&);
void operator=(MoveOnly const&);
};
void test_move_assign_from_optional_U()
{
optional<MoveOnly> a((MoveOnly(2)));
optional<MoveOnlyB> b1;
b1 = boost::move(a);
BOOST_TEST(b1);
BOOST_TEST(b1->val == 2);
BOOST_TEST(a);
BOOST_TEST(a->val == 0);
b1 = MoveOnly(4);
BOOST_TEST(b1);
BOOST_TEST(b1->val == 4);
}
void test_move_ctor_from_optional_U()
{
optional<MoveOnly> a((MoveOnly(2)));
optional<MoveOnlyB> b1(boost::move(a));
BOOST_TEST(b1);
BOOST_TEST(b1->val == 2);
BOOST_TEST(a);
BOOST_TEST(a->val == 0);
optional<MoveOnlyB> b2(( optional<MoveOnly>(( MoveOnly(4) )) ));
BOOST_TEST(b2);
BOOST_TEST(b2->val == 4);
}
void test_swap()
{
optional<MoveOnly> a((MoveOnly(2)));
optional<MoveOnly> b((MoveOnly(3)));
swap(a, b);
BOOST_TEST(a->val == 3);
BOOST_TEST(b->val == 2);
}
void test_optional_ref_to_movables()
{
MoveOnly m(3);
optional<MoveOnly&> orm = m;
orm->val = 2;
BOOST_TEST(m.val == 2);
optional<MoveOnly&> orm2 = orm;
orm2->val = 1;
BOOST_TEST(m.val == 1);
BOOST_TEST(orm->val == 1);
optional<MoveOnly&> orm3 = boost::move(orm);
orm3->val = 4;
BOOST_TEST(m.val == 4);
BOOST_TEST(orm->val == 4);
BOOST_TEST(orm2->val == 4);
}
#endif
int main()
{
#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
test_move_ctor_from_U();
test_move_ctor_form_T();
test_move_ctor_from_optional_T();
test_move_ctor_from_optional_U();
test_move_assign_from_U();
test_move_assign_from_T();
test_move_assign_from_optional_T();
test_move_assign_from_optional_U();
test_with_move_only();
test_optional_ref_to_movables();
test_swap();
#endif
return boost::report_errors();
}
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