From e47a01700940654f3f9e461ac422f55a8d0ed0c8 Mon Sep 17 00:00:00 2001 From: Andrzej Krzemienski Date: Sat, 23 Jun 2018 18:27:14 +0200 Subject: [PATCH] added o.map() --- doc/00_optional.qbk | 2 +- doc/27_ref_optional_synopsis.qbk | 4 + doc/28_ref_optional_semantics.qbk | 19 +++ doc/91_relnotes.qbk | 1 + doc/html/boost_optional/acknowledgements.html | 3 +- .../dependencies_and_portability.html | 3 +- ...emplace_operations_in_older_compilers.html | 3 +- .../optional_reference_binding.html | 3 +- doc/html/boost_optional/quick_start.html | 3 +- ...sing_unnecessary_default_construction.html | 3 +- .../optional_automatic_variables.html | 3 +- .../quick_start/optional_data_members.html | 3 +- .../quick_start/storage_in_containers.html | 3 +- ...ost_optional_bad_optional_access_hpp_.html | 3 +- .../detailed_semantics.html | 3 +- .../header__boost_optional_hpp_.html | 3 +- ...der__boost_optional_optional_fwd_hpp_.html | 3 +- .../detailed_semantics___free_functions.html | 3 +- ...ailed_semantics___optional_references.html | 3 +- .../detailed_semantics___optional_values.html | 47 ++++- .../header_optional_in_place_init.html | 3 +- .../header_optional_optional_refs.html | 3 +- .../header_optional_optional_values.html | 7 +- .../boost_optional/reference/io_header.html | 3 +- .../reference/io_header/io_semantics.html | 3 +- doc/html/boost_optional/relnotes.html | 12 +- .../tutorial/design_overview.html | 3 +- .../design_overview/the_interface.html | 3 +- .../design_overview/the_semantics.html | 3 +- .../tutorial/exception_safety_guarantees.html | 3 +- doc/html/boost_optional/tutorial/gotchas.html | 3 +- ...e_positive_with__wmaybe_uninitialized.html | 3 +- .../gotchas/mixed_relational_comparisons.html | 3 +- .../gotchas/moved_from__optional_.html | 3 +- .../tutorial/in_place_factories.html | 3 +- .../boost_optional/tutorial/io_operators.html | 3 +- .../tutorial/optional_references.html | 3 +- ...for_assignment_of_optional_references.html | 3 +- .../tutorial/performance_considerations.html | 3 +- .../tutorial/relational_operators.html | 3 +- .../tutorial/type_requirements.html | 3 +- .../tutorial/when_to_use_optional.html | 3 +- doc/html/index.html | 5 +- doc/html/optional/reference.html | 3 +- .../header__boost_optional_optional_hpp_.html | 3 +- doc/html/optional/tutorial.html | 3 +- .../detail/optional_reference_spec.hpp | 11 +- include/boost/optional/optional.hpp | 51 +++++- test/Jamfile.v2 | 1 + test/optional_test_map.cpp | 160 ++++++++++++++++++ 50 files changed, 343 insertions(+), 91 deletions(-) create mode 100644 test/optional_test_map.cpp diff --git a/doc/00_optional.qbk b/doc/00_optional.qbk index 02e21f4..00b6096 100644 --- a/doc/00_optional.qbk +++ b/doc/00_optional.qbk @@ -2,7 +2,7 @@ [quickbook 1.4] [authors [Cacciola Carballal, Fernando Luis]] [copyright 2003-2007 Fernando Luis Cacciola Carballal] - [copyright 2014-2017 Andrzej Krzemieński] + [copyright 2014-2018 Andrzej Krzemieński] [category miscellaneous] [id optional] [dirname optional] diff --git a/doc/27_ref_optional_synopsis.qbk b/doc/27_ref_optional_synopsis.qbk index 1a6a849..8454218 100644 --- a/doc/27_ref_optional_synopsis.qbk +++ b/doc/27_ref_optional_synopsis.qbk @@ -179,6 +179,10 @@ They are empty, trivially copyable classes with disabled default constructor. template T value_or_eval( F f ) const& ; ``[link reference_optional_value_or_call __GO_TO__]`` template T value_or_eval( F f ) && ; ``[link reference_optional_value_or_call_move __GO_TO__]`` + template auto map( F f ) const& -> ``['see below]``; ``[link reference_optional_map __GO_TO__]`` + template auto map( F f ) & -> ``['see below]``; ``[link reference_optional_map __GO_TO__]`` + template auto map( F f ) && -> ``['see below]``; ``[link reference_optional_map_move __GO_TO__]`` + T const* get_ptr() const ; ``[link reference_optional_get_ptr __GO_TO__]`` T* get_ptr() ; ``[link reference_optional_get_ptr __GO_TO__]`` diff --git a/doc/28_ref_optional_semantics.qbk b/doc/28_ref_optional_semantics.qbk index 8c1397f..320da2d 100644 --- a/doc/28_ref_optional_semantics.qbk +++ b/doc/28_ref_optional_semantics.qbk @@ -685,6 +685,25 @@ __SPACE__ __SPACE__ +[#reference_optional_map] + +[: `template auto optional::map(F f) const& -> ``['see below]`` ;`] +[: `template auto optional::map(F f) & -> ``['see below]`` ;`] + +* [*Effects:] `if (*this) return f(**this); else return none;` +* [*Notes:] The return type of these overloads is `optional`. On compilers that do not support ref-qualifiers on member functions, these two (as well as the next one) overloads are replaced with good old const and non-const overloads. + +__SPACE__ + +[#reference_optional_map_move] + +[: `template auto optional::map(F f) && -> ``['see below]`` ;`] + +* [*Effects:] `if (*this) return f(std::move(**this)); else return none;` +* [*Notes:] The return type of this overload is `optional`. + +__SPACE__ + [#reference_optional_get_value_or_value] [: `T const& optional::get_value_or( T const& default) const ;`] diff --git a/doc/91_relnotes.qbk b/doc/91_relnotes.qbk index 93e9799..79bb200 100644 --- a/doc/91_relnotes.qbk +++ b/doc/91_relnotes.qbk @@ -14,6 +14,7 @@ [heading Boost Release 1.68] * Added member function `has_value()` for compatibility with `std::optional` ([@https://github.com/boostorg/optional/issues/52 issue #52]). +* Added member function `map()` for transforming `optional` into `optional` using a function of type `U(T)`. [heading Boost Release 1.67] diff --git a/doc/html/boost_optional/acknowledgements.html b/doc/html/boost_optional/acknowledgements.html index f91a9f2..c6f9f2f 100644 --- a/doc/html/boost_optional/acknowledgements.html +++ b/doc/html/boost_optional/acknowledgements.html @@ -116,8 +116,7 @@ -
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/dependencies_and_portability.html b/doc/html/boost_optional/dependencies_and_portability.html index ca54b86..bc235f8 100644 --- a/doc/html/boost_optional/dependencies_and_portability.html +++ b/doc/html/boost_optional/dependencies_and_portability.html @@ -77,8 +77,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/dependencies_and_portability/emplace_operations_in_older_compilers.html b/doc/html/boost_optional/dependencies_and_portability/emplace_operations_in_older_compilers.html index afa139f..a35c4a2 100644 --- a/doc/html/boost_optional/dependencies_and_portability/emplace_operations_in_older_compilers.html +++ b/doc/html/boost_optional/dependencies_and_portability/emplace_operations_in_older_compilers.html @@ -76,8 +76,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/dependencies_and_portability/optional_reference_binding.html b/doc/html/boost_optional/dependencies_and_portability/optional_reference_binding.html index 9038cb2..7a191d2 100644 --- a/doc/html/boost_optional/dependencies_and_portability/optional_reference_binding.html +++ b/doc/html/boost_optional/dependencies_and_portability/optional_reference_binding.html @@ -93,8 +93,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/quick_start.html b/doc/html/boost_optional/quick_start.html index 18ea040..0ef16bc 100644 --- a/doc/html/boost_optional/quick_start.html +++ b/doc/html/boost_optional/quick_start.html @@ -155,8 +155,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/quick_start/bypassing_unnecessary_default_construction.html b/doc/html/boost_optional/quick_start/bypassing_unnecessary_default_construction.html index 2b38395..e039e0c 100644 --- a/doc/html/boost_optional/quick_start/bypassing_unnecessary_default_construction.html +++ b/doc/html/boost_optional/quick_start/bypassing_unnecessary_default_construction.html @@ -61,8 +61,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/quick_start/optional_automatic_variables.html b/doc/html/boost_optional/quick_start/optional_automatic_variables.html index b292f0a..f7b6664 100644 --- a/doc/html/boost_optional/quick_start/optional_automatic_variables.html +++ b/doc/html/boost_optional/quick_start/optional_automatic_variables.html @@ -61,8 +61,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/quick_start/optional_data_members.html b/doc/html/boost_optional/quick_start/optional_data_members.html index 8402401..a06aa10 100644 --- a/doc/html/boost_optional/quick_start/optional_data_members.html +++ b/doc/html/boost_optional/quick_start/optional_data_members.html @@ -80,8 +80,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/quick_start/storage_in_containers.html b/doc/html/boost_optional/quick_start/storage_in_containers.html index 36e3191..4c145f1 100644 --- a/doc/html/boost_optional/quick_start/storage_in_containers.html +++ b/doc/html/boost_optional/quick_start/storage_in_containers.html @@ -50,8 +50,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/header__boost_optional_bad_optional_access_hpp_.html b/doc/html/boost_optional/reference/header__boost_optional_bad_optional_access_hpp_.html index 56d43fc..363379c 100644 --- a/doc/html/boost_optional/reference/header__boost_optional_bad_optional_access_hpp_.html +++ b/doc/html/boost_optional/reference/header__boost_optional_bad_optional_access_hpp_.html @@ -49,8 +49,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/header__boost_optional_bad_optional_access_hpp_/detailed_semantics.html b/doc/html/boost_optional/reference/header__boost_optional_bad_optional_access_hpp_/detailed_semantics.html index e85abc9..b182324 100644 --- a/doc/html/boost_optional/reference/header__boost_optional_bad_optional_access_hpp_/detailed_semantics.html +++ b/doc/html/boost_optional/reference/header__boost_optional_bad_optional_access_hpp_/detailed_semantics.html @@ -46,8 +46,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/header__boost_optional_hpp_.html b/doc/html/boost_optional/reference/header__boost_optional_hpp_.html index f3a3649..c8d6b9e 100644 --- a/doc/html/boost_optional/reference/header__boost_optional_hpp_.html +++ b/doc/html/boost_optional/reference/header__boost_optional_hpp_.html @@ -33,8 +33,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/header__boost_optional_optional_fwd_hpp_.html b/doc/html/boost_optional/reference/header__boost_optional_optional_fwd_hpp_.html index 96f41a2..ee81dd9 100644 --- a/doc/html/boost_optional/reference/header__boost_optional_optional_fwd_hpp_.html +++ b/doc/html/boost_optional/reference/header__boost_optional_optional_fwd_hpp_.html @@ -52,8 +52,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___free_functions.html b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___free_functions.html index 5b0780b..b46bcce 100644 --- a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___free_functions.html +++ b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___free_functions.html @@ -507,8 +507,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___optional_references.html b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___optional_references.html index 4400216..3101217 100644 --- a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___optional_references.html +++ b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___optional_references.html @@ -504,8 +504,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___optional_values.html b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___optional_values.html index fd94a67..46fe0a8 100644 --- a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___optional_values.html +++ b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___optional_values.html @@ -1471,6 +1471,50 @@ ref-qualifiers on member functions this overload is not present.
+

+ space +

+

+ template<class F> auto optional<T>::map(F f) const& -> + ['see below] ; +

+

+ template<class F> auto optional<T>::map(F f) & -> ['see below] + ; +

+
    +
  • + Effects: if + (*this) return f(**this); else return + none; +
    • +
  • + Notes: The return type of these overloads + is optional<decltype(f(**this)>. + On compilers that do not support ref-qualifiers on member functions, + these two (as well as the next one) overloads are replaced with good + old const and non-const overloads. +
    • +
+

+ space +

+

+ template<class F> auto optional<T>::map(F f) && + -> ['see below] + ; +

+
    +
  • + Effects: if + (*this) return f(std::move(**this)); else return + none; +
    • +
  • + Notes: The return type of this overload + is optional<decltype(f(istd::move(**this))>. +
    • +

space

@@ -1654,8 +1698,7 @@ -
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_in_place_init.html b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_in_place_init.html index d94a2b2..be67b67 100644 --- a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_in_place_init.html +++ b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_in_place_init.html @@ -47,8 +47,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_optional_refs.html b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_optional_refs.html index f02cdb5..3934957 100644 --- a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_optional_refs.html +++ b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_optional_refs.html @@ -102,8 +102,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_optional_values.html b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_optional_values.html index 7780abd..5e960f1 100644 --- a/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_optional_values.html +++ b/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_optional_values.html @@ -105,6 +105,10 @@ template<class F> T value_or_eval( F f ) const& ; R template<class F> T value_or_eval( F f ) && ; R + template<class F> auto map( F f ) const& -> see below; R + template<class F> auto map( F f ) & -> see below; R + template<class F> auto map( F f ) && -> see below; R + T const* get_ptr() const ; R T* get_ptr() ; R @@ -132,8 +136,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/io_header.html b/doc/html/boost_optional/reference/io_header.html index 78bcfd9..fd8599f 100644 --- a/doc/html/boost_optional/reference/io_header.html +++ b/doc/html/boost_optional/reference/io_header.html @@ -58,8 +58,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/reference/io_header/io_semantics.html b/doc/html/boost_optional/reference/io_header/io_semantics.html index 13b7477..2e8ed56 100644 --- a/doc/html/boost_optional/reference/io_header/io_semantics.html +++ b/doc/html/boost_optional/reference/io_header/io_semantics.html @@ -98,8 +98,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/relnotes.html b/doc/html/boost_optional/relnotes.html index 7eb48e0..b596e38 100644 --- a/doc/html/boost_optional/relnotes.html +++ b/doc/html/boost_optional/relnotes.html @@ -31,10 +31,15 @@ Boost Release 1.68 -
  • +
      +
    • Added member function has_value() for compatibility with std::optional (issue #52). -
    +
    • +
  • + Added member function map() for transforming optional<T> into optional<U> using a function of type U(T). +
    • +

Boost @@ -271,8 +276,7 @@

-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/design_overview.html b/doc/html/boost_optional/tutorial/design_overview.html index fe959b6..31a192b 100644 --- a/doc/html/boost_optional/tutorial/design_overview.html +++ b/doc/html/boost_optional/tutorial/design_overview.html @@ -170,8 +170,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/design_overview/the_interface.html b/doc/html/boost_optional/tutorial/design_overview/the_interface.html index 5c7d153..0bb4a96 100644 --- a/doc/html/boost_optional/tutorial/design_overview/the_interface.html +++ b/doc/html/boost_optional/tutorial/design_overview/the_interface.html @@ -173,8 +173,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/design_overview/the_semantics.html b/doc/html/boost_optional/tutorial/design_overview/the_semantics.html index cdbd9e6..dbc1ab0 100644 --- a/doc/html/boost_optional/tutorial/design_overview/the_semantics.html +++ b/doc/html/boost_optional/tutorial/design_overview/the_semantics.html @@ -107,8 +107,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/exception_safety_guarantees.html b/doc/html/boost_optional/tutorial/exception_safety_guarantees.html index 6d57a52..c75dab0 100644 --- a/doc/html/boost_optional/tutorial/exception_safety_guarantees.html +++ b/doc/html/boost_optional/tutorial/exception_safety_guarantees.html @@ -161,8 +161,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/gotchas.html b/doc/html/boost_optional/tutorial/gotchas.html index 45c9435..c11cad2 100644 --- a/doc/html/boost_optional/tutorial/gotchas.html +++ b/doc/html/boost_optional/tutorial/gotchas.html @@ -98,8 +98,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/gotchas/false_positive_with__wmaybe_uninitialized.html b/doc/html/boost_optional/tutorial/gotchas/false_positive_with__wmaybe_uninitialized.html index 2352db7..240ee0f 100644 --- a/doc/html/boost_optional/tutorial/gotchas/false_positive_with__wmaybe_uninitialized.html +++ b/doc/html/boost_optional/tutorial/gotchas/false_positive_with__wmaybe_uninitialized.html @@ -63,8 +63,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/gotchas/mixed_relational_comparisons.html b/doc/html/boost_optional/tutorial/gotchas/mixed_relational_comparisons.html index 187e457..8d25f0d 100644 --- a/doc/html/boost_optional/tutorial/gotchas/mixed_relational_comparisons.html +++ b/doc/html/boost_optional/tutorial/gotchas/mixed_relational_comparisons.html @@ -45,8 +45,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/gotchas/moved_from__optional_.html b/doc/html/boost_optional/tutorial/gotchas/moved_from__optional_.html index 0e1b772..7a4e444 100644 --- a/doc/html/boost_optional/tutorial/gotchas/moved_from__optional_.html +++ b/doc/html/boost_optional/tutorial/gotchas/moved_from__optional_.html @@ -49,8 +49,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/in_place_factories.html b/doc/html/boost_optional/tutorial/in_place_factories.html index f00e5ed..5f0c426 100644 --- a/doc/html/boost_optional/tutorial/in_place_factories.html +++ b/doc/html/boost_optional/tutorial/in_place_factories.html @@ -183,8 +183,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/io_operators.html b/doc/html/boost_optional/tutorial/io_operators.html index bbfc1f7..713b283 100644 --- a/doc/html/boost_optional/tutorial/io_operators.html +++ b/doc/html/boost_optional/tutorial/io_operators.html @@ -73,8 +73,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/optional_references.html b/doc/html/boost_optional/tutorial/optional_references.html index 417ff36..fb0fb56 100644 --- a/doc/html/boost_optional/tutorial/optional_references.html +++ b/doc/html/boost_optional/tutorial/optional_references.html @@ -103,8 +103,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/optional_references/rebinding_semantics_for_assignment_of_optional_references.html b/doc/html/boost_optional/tutorial/optional_references/rebinding_semantics_for_assignment_of_optional_references.html index f12fb59..6e827d0 100644 --- a/doc/html/boost_optional/tutorial/optional_references/rebinding_semantics_for_assignment_of_optional_references.html +++ b/doc/html/boost_optional/tutorial/optional_references/rebinding_semantics_for_assignment_of_optional_references.html @@ -133,8 +133,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/performance_considerations.html b/doc/html/boost_optional/tutorial/performance_considerations.html index 6a6667d..19fe1ed 100644 --- a/doc/html/boost_optional/tutorial/performance_considerations.html +++ b/doc/html/boost_optional/tutorial/performance_considerations.html @@ -251,8 +251,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/relational_operators.html b/doc/html/boost_optional/tutorial/relational_operators.html index 8aa9234..376bdcc 100644 --- a/doc/html/boost_optional/tutorial/relational_operators.html +++ b/doc/html/boost_optional/tutorial/relational_operators.html @@ -99,8 +99,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/type_requirements.html b/doc/html/boost_optional/tutorial/type_requirements.html index 191f5fe..d213a4f 100644 --- a/doc/html/boost_optional/tutorial/type_requirements.html +++ b/doc/html/boost_optional/tutorial/type_requirements.html @@ -95,8 +95,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/boost_optional/tutorial/when_to_use_optional.html b/doc/html/boost_optional/tutorial/when_to_use_optional.html index b56a8c0..3caec24 100644 --- a/doc/html/boost_optional/tutorial/when_to_use_optional.html +++ b/doc/html/boost_optional/tutorial/when_to_use_optional.html @@ -128,8 +128,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/index.html b/doc/html/index.html index b9ec32a..a37010c 100644 --- a/doc/html/index.html +++ b/doc/html/index.html @@ -26,8 +26,7 @@ Fernando Luis Cacciola Carballal

Copyright © 2003-2007 Fernando Luis Cacciola Carballal

-

Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2014-2018 Andrzej Krzemieński

Distributed under the Boost Software License, Version 1.0. (See accompanying @@ -146,7 +145,7 @@

- +

Last revised: March 23, 2018 at 23:01:17 GMT

Last revised: June 23, 2018 at 16:25:31 GMT
diff --git a/doc/html/optional/reference.html b/doc/html/optional/reference.html index da63269..d3b0ab7 100644 --- a/doc/html/optional/reference.html +++ b/doc/html/optional/reference.html @@ -75,8 +75,7 @@ -
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/optional/reference/header__boost_optional_optional_hpp_.html b/doc/html/optional/reference/header__boost_optional_optional_hpp_.html index fdfb029..c416301 100644 --- a/doc/html/optional/reference/header__boost_optional_optional_hpp_.html +++ b/doc/html/optional/reference/header__boost_optional_optional_hpp_.html @@ -97,8 +97,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/doc/html/optional/tutorial.html b/doc/html/optional/tutorial.html index 6d1122b..972f9f7 100644 --- a/doc/html/optional/tutorial.html +++ b/doc/html/optional/tutorial.html @@ -139,8 +139,7 @@
-
Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2017 Andrzej - Krzemieński

+

Copyright © 2003-2007 Fernando Luis Cacciola Carballal
Copyright © 2014-2018 Andrzej Krzemieński

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)

diff --git a/include/boost/optional/detail/optional_reference_spec.hpp b/include/boost/optional/detail/optional_reference_spec.hpp index 8e9974c..2e08e30 100644 --- a/include/boost/optional/detail/optional_reference_spec.hpp +++ b/include/boost/optional/detail/optional_reference_spec.hpp @@ -1,4 +1,4 @@ -// Copyright (C) 2015-2016 Andrzej Krzemienski. +// Copyright (C) 2015-2018 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 @@ -161,6 +161,15 @@ public: bool is_initialized() const BOOST_NOEXCEPT { return ptr_ != 0; } bool has_value() const BOOST_NOEXCEPT { return ptr_ != 0; } + template + optional::type> map(F f) const + { + if (this->has_value()) + return f(this->get()); + else + return none; + } + #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES optional(T&& /* rhs */) BOOST_NOEXCEPT { detail::prevent_binding_rvalue(); } diff --git a/include/boost/optional/optional.hpp b/include/boost/optional/optional.hpp index 17c8f89..8ee259c 100644 --- a/include/boost/optional/optional.hpp +++ b/include/boost/optional/optional.hpp @@ -1,5 +1,5 @@ // Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal. -// Copyright (C) 2014 - 2017 Andrzej Krzemienski. +// Copyright (C) 2014 - 2018 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 @@ -53,6 +53,7 @@ #include #include #include +#include #include #include @@ -1304,7 +1305,7 @@ class optional #endif -#ifndef BOOST_NO_CXX11_REF_QUALIFIERS +#if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) template value_type value_or_eval ( F f ) const& { @@ -1322,6 +1323,34 @@ class optional else return f(); } + + template + optional::type> map(F f) & + { + if (this->has_value()) + return f(get()); + else + return none; + } + + template + optional::type> map(F f) const& + { + if (this->has_value()) + return f(get()); + else + return none; + } + + template + optional::type> map(F f) && + { + if (this->has_value()) + return f(boost::move(this->get())); + else + return none; + } + #else template value_type value_or_eval ( F f ) const @@ -1331,6 +1360,24 @@ class optional else return f(); } + + template + optional::type> map(F f) + { + if (this->has_value()) + return f(get()); + else + return none; + } + + template + optional::type> map(F f) const + { + if (this->has_value()) + return f(get()); + else + return none; + } #endif bool has_value() const BOOST_NOEXCEPT { return this->is_initialized() ; } diff --git a/test/Jamfile.v2 b/test/Jamfile.v2 index edc2e14..f181ec7 100644 --- a/test/Jamfile.v2 +++ b/test/Jamfile.v2 @@ -23,6 +23,7 @@ import testing ; [ run optional_test_convert_from_T.cpp ] [ run optional_test_empty_braces.cpp ] [ run optional_test_make_optional.cpp ] + [ run optional_test_map.cpp ] [ run optional_test_tie.cpp ] [ run optional_test_ref_assign_portable_minimum.cpp ] [ run optional_test_ref_assign_mutable_int.cpp ] diff --git a/test/optional_test_map.cpp b/test/optional_test_map.cpp new file mode 100644 index 0000000..9a9aab2 --- /dev/null +++ b/test/optional_test_map.cpp @@ -0,0 +1,160 @@ +// Copyright (C) 2018 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 __BORLANDC__ +#pragma hdrstop +#endif + +#include "boost/core/ignore_unused.hpp" +#include "boost/core/is_same.hpp" +#include "boost/core/lightweight_test.hpp" +#include "boost/core/lightweight_test_trait.hpp" + + +using boost::optional; +using boost::make_optional; +using boost::core::is_same; + +template +void verify_type(Deduced) +{ + BOOST_TEST_TRAIT_TRUE(( is_same )); +} + +#if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) +struct MoveOnly +{ + int value; + explicit MoveOnly(int i) : value(i) {} + MoveOnly(MoveOnly && r) : value(r.value) { r.value = 0; } + MoveOnly& operator=(MoveOnly && r) { value = r.value; r.value = 0; return *this; } + +private: + MoveOnly(MoveOnly const&); + void operator=(MoveOnly const&); +}; + +MoveOnly makeMoveOnly(int i) +{ + return MoveOnly(i); +} + +optional makeOptMoveOnly(int i) +{ + return optional(MoveOnly(i)); +} + +int get_val(MoveOnly m) +{ + return m.value; +} + +void test_map_move_only() +{ + optional om (makeMoveOnly(7)), om2 (makeMoveOnly(8)); + verify_type>(boost::move(om).map(get_val)); + optional oi = boost::move(om2).map(get_val); + BOOST_TEST(bool(oi)); + BOOST_TEST_EQ(8, *oi); + + optional oj = makeOptMoveOnly(4).map(get_val); + BOOST_TEST(bool(oj)); + BOOST_TEST_EQ(4, *oj); + + optional o_; + optional oi_ = boost::move(o_).map(get_val); + BOOST_TEST(!oi_); +} + +#endif // no rvalue refs + +struct Int +{ + int i; + explicit Int(int i_) : i(i_) {} +}; + +struct convert_t +{ + Int operator()(int i) { return Int(i); } +}; + +int& get_int_ref(Int& i) +{ + return i.i; +} + +struct get_ref +{ + int& operator()(int& i) { return i; } +}; + +void test_map() +{ + optional oi (1); + verify_type>(oi.map(convert_t())); + optional oI = oi.map(convert_t()); + BOOST_TEST(bool(oI)); + BOOST_TEST_EQ(1, oI->i); +} + +void test_map_with_lambda() +{ +#ifndef BOOST_NO_CXX11_LAMBDAS + optional oi (1), oj(2); + verify_type>(oi.map([](int i){ return i == 1; })); + optional ob = oi.map([](int i){ return i == 1; }); + optional oc = oj.map([](int i){ return i == 1; }); + BOOST_TEST(bool(ob)); + BOOST_TEST_EQ(true, *ob); + BOOST_TEST(bool(oc)); + BOOST_TEST_EQ(false, *oc); +#endif // lambdas +} + +void test_map_to_ref() +{ + optional oi (2); + verify_type>(oi.map(get_ref())); + optional ori = oi.map(get_ref()); + BOOST_TEST(bool(ori)); + *ori = 3; + BOOST_TEST(bool(oi)); + BOOST_TEST_EQ(3, *oi); + BOOST_TEST_EQ(3, *ori); +} + +void test_map_optional_ref() +{ + Int I (5); + optional ori (I); + verify_type>(ori.map(get_int_ref)); + optional orii = ori.map(get_int_ref); + BOOST_TEST(bool(orii)); + BOOST_TEST_EQ(5, *orii); + *orii = 6; + BOOST_TEST_EQ(6, I.i); +} + +int main() +{ +#if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) + test_map_move_only(); +#endif + test_map_with_lambda(); + test_map(); + test_map_to_ref(); + test_map_optional_ref(); + + return boost::report_errors(); +}