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Andrzej Krzemienski
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doc/00_optional.qbk
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@ -91,6 +91,7 @@ This is how you solve it with `boost::optional`:
[include 20_reference.qbk]
[endsect]
[include 90_dependencies.qbk]
[include 91_acknowledgments.qbk]
[include 91_relnotes.qbk]
[include 92_acknowledgments.qbk]

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[/
Boost.Optional
Copyright (c) 2015 Andrzej Krzemienski
Distributed under 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)
]
[section:relnotes Release Notes]
[heading Boost Release 1.58]
* `boost::none_t` is no longer convertible from literal `0`. This avoids a bug where `optional<rational<int>> oi = 0;` would initialize an optional object with no contained value.
[heading Boost Release 1.57]
* [@https://github.com/boostorg/optional/pull/9 Git pull #9]: ['"Supply `<string>` to fix C++03 compile error on `logic_error("...")`"].
[heading Boost Release 1.56]
* Added support for rvalue references. Now `optional<T>` works with moveable but non-copyable `T`'s,
* Improved `swap` (now uses move operations),
* Added function `emplace()`. This is the last of the requests from [@https://svn.boost.org/trac/boost/ticket/1841 Trac #1841],
* `optional` is moveable, including conditional `noexcept` specifications, which make it `move_if_noexcept`-friendly,
* Using explicit operator bool() on platforms that support it ([@https://svn.boost.org/trac/boost/ticket/4227 Trac #4227]) (breaking change),
* Forward declaration of `operator<<(ostream&, optional const&)` to prevent inadvertent incorrect serialization of optional objects,
* Removed deprecated function `reset()` from examples ([@https://svn.boost.org/trac/boost/ticket/9005 Trac #9005]),
* Equality comparison with `boost::none` does not require that `T` be EqualityComparable,
* Optional rvalue references are explicitly disallowed,
* Binding temporaries to optional references is explicitly disallowed (breaking change),
* More ways to access the contained value, functions `value()`, `value_or()`, `value_or_eval()`,
* Updated and reorganized documentation, added tutorial and quick guide sections.
[endsect][/ relnotes]

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@ -9,7 +9,7 @@
]
[section Acknowledgements]
[section:acknowledgements Acknowledgements]
[heading Pre-formal review]

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@ -6,7 +6,7 @@
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@ -7,7 +7,7 @@
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<a name="boost_optional.relnotes.h0"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_58"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_58">Boost
Release 1.58</a>
</h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
<code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">none_t</span></code> is no longer convertible from
literal <code class="computeroutput"><span class="number">0</span></code>. This avoids a bug
where <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">rational</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;&gt;</span> <span class="identifier">oi</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span></code> would
initialize an optional object with no contained value.
</li></ul></div>
<h4>
<a name="boost_optional.relnotes.h1"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_57"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_57">Boost
Release 1.57</a>
</h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
<a href="https://github.com/boostorg/optional/pull/9" target="_top">Git pull #9</a>:
<span class="emphasis"><em>"Supply <code class="computeroutput"><span class="special">&lt;</span><span class="identifier">string</span><span class="special">&gt;</span></code>
to fix C++03 compile error on <code class="computeroutput"><span class="identifier">logic_error</span><span class="special">(</span><span class="string">"..."</span><span class="special">)</span></code>"</em></span>.
</li></ul></div>
<h4>
<a name="boost_optional.relnotes.h2"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_56"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_56">Boost
Release 1.56</a>
</h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Added support for rvalue references. Now <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code> works with moveable but non-copyable
<code class="computeroutput"><span class="identifier">T</span></code>'s,
</li>
<li class="listitem">
Improved <code class="computeroutput"><span class="identifier">swap</span></code> (now uses
move operations),
</li>
<li class="listitem">
Added function <code class="computeroutput"><span class="identifier">emplace</span><span class="special">()</span></code>. This is the last of the requests from
<a href="https://svn.boost.org/trac/boost/ticket/1841" target="_top">Trac #1841</a>,
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">optional</span></code> is moveable, including
conditional <code class="computeroutput"><span class="keyword">noexcept</span></code> specifications,
which make it <code class="computeroutput"><span class="identifier">move_if_noexcept</span></code>-friendly,
</li>
<li class="listitem">
Using explicit operator bool() on platforms that support it (<a href="https://svn.boost.org/trac/boost/ticket/4227" target="_top">Trac
#4227</a>) (breaking change),
</li>
<li class="listitem">
Forward declaration of <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;(</span><span class="identifier">ostream</span><span class="special">&amp;,</span> <span class="identifier">optional</span>
<span class="keyword">const</span><span class="special">&amp;)</span></code>
to prevent inadvertent incorrect serialization of optional objects,
</li>
<li class="listitem">
Removed deprecated function <code class="computeroutput"><span class="identifier">reset</span><span class="special">()</span></code> from examples (<a href="https://svn.boost.org/trac/boost/ticket/9005" target="_top">Trac
#9005</a>),
</li>
<li class="listitem">
Equality comparison with <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">none</span></code>
does not require that <code class="computeroutput"><span class="identifier">T</span></code>
be EqualityComparable,
</li>
<li class="listitem">
Optional rvalue references are explicitly disallowed,
</li>
<li class="listitem">
Binding temporaries to optional references is explicitly disallowed (breaking
change),
</li>
<li class="listitem">
More ways to access the contained value, functions <code class="computeroutput"><span class="identifier">value</span><span class="special">()</span></code>, <code class="computeroutput"><span class="identifier">value_or</span><span class="special">()</span></code>, <code class="computeroutput"><span class="identifier">value_or_eval</span><span class="special">()</span></code>,
</li>
<li class="listitem">
Updated and reorganized documentation, added tutorial and quick guide sections.
</li>
</ul></div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p>
</div></td>
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3
doc/html/index.html
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@ -86,6 +86,7 @@
<dt><span class="section"><a href="boost_optional/dependencies_and_portability/optional_reference_binding.html">Optional
Reference Binding</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="boost_optional/relnotes.html">Release Notes</a></span></dt>
<dt><span class="section"><a href="boost_optional/acknowledgements.html">Acknowledgements</a></span></dt>
</dl>
</div>
@ -136,7 +137,7 @@
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"><p><small>Last revised: December 06, 2014 at 20:01:35 GMT</small></p></td>
<td align="left"><p><small>Last revised: January 12, 2015 at 16:12:58 GMT</small></p></td>
<td align="right"><div class="copyright-footer"></div></td>
</tr></table>
<hr>

220
test/optional_test_move.cpp
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@ -1,4 +1,4 @@
// Copyright (C) 2014 Andrzej Krzemienski.
// 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
@ -8,19 +8,7 @@
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
//
// Revisions:
//
#include<iostream>
#include<stdexcept>
#include<string>
#define BOOST_ENABLE_ASSERT_HANDLER
#include "boost/bind/apply.hpp" // Included just to test proper interaction with boost::apply<> as reported by Daniel Wallin
#include "boost/mpl/bool.hpp"
#include "boost/mpl/bool_fwd.hpp" // For mpl::true_ and mpl::false_
#include "boost/static_assert.hpp"
#include "boost/optional/optional.hpp"
@ -28,11 +16,10 @@
#pragma hdrstop
#endif
#include "boost/none.hpp"
#include "boost/core/lightweight_test.hpp"
#include "boost/test/minimal.hpp"
#include "optional_test_common.cpp"
using boost::optional;
using boost::none;
//#ifndef BOOST_OPTIONAL_NO_CONVERTING_ASSIGNMENT
//#ifndef BOOST_OPTIONAL_NO_CONVERTING_COPY_CTOR
@ -86,37 +73,37 @@ 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_CHECK(o1);
BOOST_CHECK(o1->s == sValueMoveConstructed || o1->s == sMoveConstructed);
BOOST_TEST(o1);
BOOST_TEST(o1->s == sValueMoveConstructed || o1->s == sMoveConstructed);
OracleVal v1;
optional<Oracle> o2 (v1);
BOOST_CHECK(o2);
BOOST_CHECK(o2->s == sValueCopyConstructed || o2->s == sCopyConstructed || o2->s == sMoveConstructed );
BOOST_CHECK(v1.s == sIntConstructed);
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_CHECK(o3);
BOOST_CHECK(o3->s == sValueMoveConstructed || o3->s == sMoveConstructed);
BOOST_CHECK(v1.s == sMovedFrom);
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_CHECK(o1);
BOOST_CHECK(o1->s == sMoveConstructed);
BOOST_TEST(o1);
BOOST_TEST(o1->s == sMoveConstructed);
Oracle v1;
optional<Oracle> o2 (v1);
BOOST_CHECK(o2);
BOOST_CHECK(o2->s == sCopyConstructed);
BOOST_CHECK(v1.s == sDefaultConstructed);
BOOST_TEST(o2);
BOOST_TEST(o2->s == sCopyConstructed);
BOOST_TEST(v1.s == sDefaultConstructed);
optional<Oracle> o3 (boost::move(v1));
BOOST_CHECK(o3);
BOOST_CHECK(o3->s == sMoveConstructed);
BOOST_CHECK(v1.s == sMovedFrom);
BOOST_TEST(o3);
BOOST_TEST(o3->s == sMoveConstructed);
BOOST_TEST(v1.s == sMovedFrom);
}
void test_move_ctor_from_optional_T()
@ -124,22 +111,22 @@ void test_move_ctor_from_optional_T()
optional<Oracle> o1;
optional<Oracle> o2(boost::move(o1));
BOOST_CHECK(!o1);
BOOST_CHECK(!o2);
BOOST_TEST(!o1);
BOOST_TEST(!o2);
optional<Oracle> o3((Oracle()));
optional<Oracle> o4(boost::move(o3));
BOOST_CHECK(o3);
BOOST_CHECK(o4);
BOOST_CHECK(o3->s == sMovedFrom);
BOOST_CHECK(o4->s == sMoveConstructed);
BOOST_TEST(o3);
BOOST_TEST(o4);
BOOST_TEST(o3->s == sMovedFrom);
BOOST_TEST(o4->s == sMoveConstructed);
optional<Oracle> o5((optional<Oracle>()));
BOOST_CHECK(!o5);
BOOST_TEST(!o5);
optional<Oracle> o6((optional<Oracle>(Oracle())));
BOOST_CHECK(o6);
BOOST_CHECK(o6->s == sMoveConstructed);
BOOST_TEST(o6);
BOOST_TEST(o6->s == sMoveConstructed);
optional<Oracle> o7(o6); // does copy ctor from non-const lvalue compile?
}
@ -149,59 +136,59 @@ 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_CHECK(o1);
BOOST_TEST(o1);
BOOST_CHECK(o1->s == sValueMoveConstructed);
BOOST_TEST(o1->s == sValueMoveConstructed);
o1 = OracleVal();
BOOST_CHECK(o1);
BOOST_CHECK(o1->s == sMoveAssigned);
BOOST_TEST(o1);
BOOST_TEST(o1->s == sMoveAssigned);
OracleVal v1;
optional<Oracle> o2;
o2 = v1;
BOOST_CHECK(o2);
BOOST_CHECK(o2->s == sValueCopyConstructed);
BOOST_CHECK(v1.s == sIntConstructed);
BOOST_TEST(o2);
BOOST_TEST(o2->s == sValueCopyConstructed);
BOOST_TEST(v1.s == sIntConstructed);
o2 = v1;
BOOST_CHECK(o2);
BOOST_CHECK(o2->s == sCopyAssigned || o2->s == sMoveAssigned);
BOOST_CHECK(v1.s == sIntConstructed);
BOOST_TEST(o2);
BOOST_TEST(o2->s == sCopyAssigned || o2->s == sMoveAssigned);
BOOST_TEST(v1.s == sIntConstructed);
optional<Oracle> o3;
o3 = boost::move(v1);
BOOST_CHECK(o3);
BOOST_CHECK(o3->s == sValueMoveConstructed);
BOOST_CHECK(v1.s == sMovedFrom);
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_CHECK(o1);
BOOST_CHECK(o1->s == sMoveConstructed);
BOOST_TEST(o1);
BOOST_TEST(o1->s == sMoveConstructed);
o1 = Oracle();
BOOST_CHECK(o1);
BOOST_CHECK(o1->s == sMoveAssigned);
BOOST_TEST(o1);
BOOST_TEST(o1->s == sMoveAssigned);
Oracle v1;
optional<Oracle> o2;
o2 = v1;
BOOST_CHECK(o2);
BOOST_CHECK(o2->s == sCopyConstructed);
BOOST_CHECK(v1.s == sDefaultConstructed);
BOOST_TEST(o2);
BOOST_TEST(o2->s == sCopyConstructed);
BOOST_TEST(v1.s == sDefaultConstructed);
o2 = v1;
BOOST_CHECK(o2);
BOOST_CHECK(o2->s == sCopyAssigned);
BOOST_CHECK(v1.s == sDefaultConstructed);
BOOST_TEST(o2);
BOOST_TEST(o2->s == sCopyAssigned);
BOOST_TEST(v1.s == sDefaultConstructed);
optional<Oracle> o3;
o3 = boost::move(v1);
BOOST_CHECK(o3);
BOOST_CHECK(o3->s == sMoveConstructed);
BOOST_CHECK(v1.s == sMovedFrom);
BOOST_TEST(o3);
BOOST_TEST(o3->s == sMoveConstructed);
BOOST_TEST(v1.s == sMovedFrom);
}
void test_move_assign_from_optional_T()
@ -209,23 +196,23 @@ void test_move_assign_from_optional_T()
optional<Oracle> o1;
optional<Oracle> o2;
o1 = optional<Oracle>();
BOOST_CHECK(!o1);
BOOST_TEST(!o1);
optional<Oracle> o3((Oracle()));
o1 = o3;
BOOST_CHECK(o3);
BOOST_CHECK(o3->s == sMoveConstructed);
BOOST_CHECK(o1);
BOOST_CHECK(o1->s == sCopyConstructed);
BOOST_TEST(o3);
BOOST_TEST(o3->s == sMoveConstructed);
BOOST_TEST(o1);
BOOST_TEST(o1->s == sCopyConstructed);
o2 = boost::move(o3);
BOOST_CHECK(o3);
BOOST_CHECK(o3->s == sMovedFrom);
BOOST_CHECK(o2);
BOOST_CHECK(o2->s == sMoveConstructed);
BOOST_TEST(o3);
BOOST_TEST(o3->s == sMovedFrom);
BOOST_TEST(o2);
BOOST_TEST(o2->s == sMoveConstructed);
o2 = optional<Oracle>((Oracle()));
BOOST_CHECK(o2);
BOOST_CHECK(o2->s == sMoveAssigned);
BOOST_TEST(o2);
BOOST_TEST(o2->s == sMoveAssigned);
}
class MoveOnly
@ -247,21 +234,21 @@ void test_with_move_only()
{
optional<MoveOnly> o1;
optional<MoveOnly> o2((MoveOnly(1)));
BOOST_CHECK(o2);
BOOST_CHECK(o2->val == 1);
BOOST_TEST(o2);
BOOST_TEST(o2->val == 1);
optional<MoveOnly> o3 (boost::move(o1));
BOOST_CHECK(!o3);
BOOST_TEST(!o3);
optional<MoveOnly> o4 (boost::move(o2));
BOOST_CHECK(o4);
BOOST_CHECK(o4->val == 1);
BOOST_CHECK(o2);
BOOST_CHECK(o2->val == 0);
BOOST_TEST(o4);
BOOST_TEST(o4->val == 1);
BOOST_TEST(o2);
BOOST_TEST(o2->val == 0);
o3 = boost::move(o4);
BOOST_CHECK(o3);
BOOST_CHECK(o3->val == 1);
BOOST_CHECK(o4);
BOOST_CHECK(o4->val == 0);
BOOST_TEST(o3);
BOOST_TEST(o3->val == 1);
BOOST_TEST(o4);
BOOST_TEST(o4->val == 0);
}
class MoveOnlyB
@ -287,15 +274,15 @@ void test_move_assign_from_optional_U()
optional<MoveOnlyB> b1;
b1 = boost::move(a);
BOOST_CHECK(b1);
BOOST_CHECK(b1->val == 2);
BOOST_CHECK(a);
BOOST_CHECK(a->val == 0);
BOOST_TEST(b1);
BOOST_TEST(b1->val == 2);
BOOST_TEST(a);
BOOST_TEST(a->val == 0);
b1 = MoveOnly(4);
BOOST_CHECK(b1);
BOOST_CHECK(b1->val == 4);
BOOST_TEST(b1);
BOOST_TEST(b1->val == 4);
}
void test_move_ctor_from_optional_U()
@ -303,15 +290,15 @@ void test_move_ctor_from_optional_U()
optional<MoveOnly> a((MoveOnly(2)));
optional<MoveOnlyB> b1(boost::move(a));
BOOST_CHECK(b1);
BOOST_CHECK(b1->val == 2);
BOOST_CHECK(a);
BOOST_CHECK(a->val == 0);
BOOST_TEST(b1);
BOOST_TEST(b1->val == 2);
BOOST_TEST(a);
BOOST_TEST(a->val == 0);
optional<MoveOnlyB> b2(( optional<MoveOnly>(( MoveOnly(4) )) ));
BOOST_CHECK(b2);
BOOST_CHECK(b2->val == 4);
BOOST_TEST(b2);
BOOST_TEST(b2->val == 4);
}
void test_swap()
@ -320,8 +307,8 @@ void test_swap()
optional<MoveOnly> b((MoveOnly(3)));
swap(a, b);
BOOST_CHECK(a->val == 3);
BOOST_CHECK(b->val == 2);
BOOST_TEST(a->val == 3);
BOOST_TEST(b->val == 2);
}
void test_optional_ref_to_movables()
@ -329,26 +316,24 @@ void test_optional_ref_to_movables()
MoveOnly m(3);
optional<MoveOnly&> orm = m;
orm->val = 2;
BOOST_CHECK(m.val == 2);
BOOST_TEST(m.val == 2);
optional<MoveOnly&> orm2 = orm;
orm2->val = 1;
BOOST_CHECK(m.val == 1);
BOOST_CHECK(orm->val == 1);
BOOST_TEST(m.val == 1);
BOOST_TEST(orm->val == 1);
optional<MoveOnly&> orm3 = boost::move(orm);
orm3->val = 4;
BOOST_CHECK(m.val == 4);
BOOST_CHECK(orm->val == 4);
BOOST_CHECK(orm2->val == 4);
BOOST_TEST(m.val == 4);
BOOST_TEST(orm->val == 4);
BOOST_TEST(orm2->val == 4);
}
#endif
int test_main( int, char* [] )
int main()
{
try
{
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
test_move_ctor_from_U();
test_move_ctor_form_T();
@ -362,13 +347,6 @@ int test_main( int, char* [] )
test_optional_ref_to_movables();
test_swap();
#endif
}
catch ( ... )
{
BOOST_ERROR("Unexpected Exception caught!");
}
return 0;
return boost::report_errors();
}