Restrict clang-win to 64 bit to avoid mspdbcore.dll error

Avoid -Wmaybe-uninitialized warnings in gcc (issue #27).

.travis.yml

@@ -1,4 +1,4 @@
-# Copyright 2016, 2017, 2018 Peter Dimov
+# Copyright 2016-2019 Peter Dimov
 # Distributed under the Boost Software License, Version 1.0.
 # (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
 
@@ -6,6 +6,8 @@ language: cpp
 
 sudo: false
 
+dist: trusty
+
 branches:
   only:
     - master
@@ -24,7 +26,7 @@ matrix:
   include:
     - os: linux
       compiler: g++
-      env: TOOLSET=gcc CXXSTD=03,11 VARIANT=debug,release
+      env: TOOLSET=gcc CXXSTD=03,11
 
     - os: linux
       compiler: g++-4.4
@@ -97,7 +99,7 @@ matrix:
 
     - os: linux
       compiler: g++-7
-      env: TOOLSET=gcc CXXSTD=03,11,14,17 VARIANT=release
+      env: TOOLSET=gcc CXXSTD=03,11,14,17
       addons:
         apt:
           packages:
@@ -115,6 +117,16 @@ matrix:
           sources:
             - ubuntu-toolchain-r-test
 
+    - os: linux
+      compiler: g++-9
+      env: TOOLSET=gcc CXXSTD=03,11,14,17,2a
+      addons:
+        apt:
+          packages:
+            - g++-9
+          sources:
+            - ubuntu-toolchain-r-test
+
     - os: linux
       compiler: g++-7
       env: UBSAN=1 TOOLSET=gcc CXXSTD=03,11,14,17 UBSAN_OPTIONS=print_stacktrace=1 LINKFLAGS=-fuse-ld=gold
@@ -127,7 +139,7 @@ matrix:
 
     - os: linux
       compiler: clang++
-      env: TOOLSET=clang CXXSTD=03,11 VARIANT=debug,release
+      env: TOOLSET=clang CXXSTD=03,11
 
     - os: linux
       compiler: /usr/bin/clang++
@@ -216,7 +228,7 @@ matrix:
 
     - os: linux
       compiler: clang++-5.0
-      env: TOOLSET=clang CXXSTD=03,11,14,1z VARIANT=release
+      env: TOOLSET=clang CXXSTD=03,11,14,1z
       addons:
         apt:
           packages:
@@ -248,19 +260,30 @@ matrix:
             - llvm-toolchain-trusty-7
 
     - os: linux
-      compiler: clang++-5.0
-      env: UBSAN=1 TOOLSET=clang CXXSTD=03,11,14,1z UBSAN_OPTIONS=print_stacktrace=1
+      compiler: clang++-8
+      env: TOOLSET=clang CXXSTD=03,11,14,17,2a
       addons:
         apt:
           packages:
-            - clang-5.0
+            - clang-8
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-5.0
+            - llvm-toolchain-trusty-8
+
+    - os: linux
+      compiler: clang++-8
+      env: UBSAN=1 TOOLSET=clang CXXSTD=03,11,14,17,2a UBSAN_OPTIONS=print_stacktrace=1
+      addons:
+        apt:
+          packages:
+            - clang-8
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-trusty-8
 
     - os: linux
       compiler: clang++-libc++
-      env: TOOLSET=clang CXXSTD=03,11,14,1z VARIANT=release
+      env: TOOLSET=clang CXXSTD=03,11,14,1z
       addons:
         apt:
           packages:
@@ -283,8 +306,6 @@ install:
   - cd ..
   - git clone -b $BOOST_BRANCH https://github.com/boostorg/boost.git boost-root
   - cd boost-root
-  - git submodule update --init tools/build
-  - git submodule update --init libs/config
   - git submodule update --init tools/boostdep
   - cp -r $TRAVIS_BUILD_DIR/* libs/function
   - python tools/boostdep/depinst/depinst.py function
@@ -294,7 +315,7 @@ install:
 script:
   - |-
     echo "using $TOOLSET : : $TRAVIS_COMPILER ;" > ~/user-config.jam
-  - ./b2 -j3 libs/function/test toolset=$TOOLSET cxxstd=$CXXSTD ${VARIANT:+variant=$VARIANT} ${UBSAN:+cxxflags=-fsanitize=undefined cxxflags=-fno-sanitize-recover=undefined linkflags=-fsanitize=undefined debug-symbols=on} ${LINKFLAGS:+linkflags=$LINKFLAGS}
+  - ./b2 -j3 libs/function/test toolset=$TOOLSET cxxstd=$CXXSTD variant=debug,release ${UBSAN:+cxxflags=-fsanitize=undefined cxxflags=-fno-sanitize-recover=undefined linkflags=-fsanitize=undefined debug-symbols=on} ${LINKFLAGS:+linkflags=$LINKFLAGS}
 
 notifications:
   email:

CMakeLists.txt

@@ -0,0 +1,28 @@
+# Copyright 2019 Peter Dimov
+# 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
+
+# Partial (add_subdirectory only) and experimental CMake support
+# Subject to change; please do not rely on the contents of this file yet
+
+cmake_minimum_required(VERSION 3.5)
+project(BoostFunction LANGUAGES CXX)
+
+add_library(boost_function INTERFACE)
+add_library(Boost::function ALIAS boost_function)
+
+target_include_directories(boost_function INTERFACE include)
+
+target_link_libraries(boost_function
+    INTERFACE
+        Boost::assert
+        Boost::bind
+        Boost::config
+        Boost::core
+        Boost::integer
+        Boost::preprocessor
+        Boost::throw_exception
+        Boost::type_index
+        Boost::type_traits
+        Boost::typeof
+)

Jamfile

@@ -1,11 +0,0 @@
-#  Boost.Function Library Jamfile
-#
-#  Copyright (c) 2018 James E. King III
-#
-#  Use, modification, and distribution are 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)
-
-# please order by name to ease maintenance
-build-project example ;
-build-project test ;

LICENSE

@@ -1,23 +0,0 @@
-Boost Software License - Version 1.0 - August 17th, 2003
-
-Permission is hereby granted, free of charge, to any person or organization
-obtaining a copy of the software and accompanying documentation covered by
-this license (the "Software") to use, reproduce, display, distribute,
-execute, and transmit the Software, and to prepare derivative works of the
-Software, and to permit third-parties to whom the Software is furnished to
-do so, all subject to the following:
-
-The copyright notices in the Software and this entire statement, including
-the above license grant, this restriction and the following disclaimer,
-must be included in all copies of the Software, in whole or in part, and
-all derivative works of the Software, unless such copies or derivative
-works are solely in the form of machine-executable object code generated by
-a source language processor.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
-SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
-FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-DEALINGS IN THE SOFTWARE.

README.md

@@ -1,34 +1,18 @@
-Function, part of collection of the [Boost C++ Libraries](http://github.com/boostorg), contains a family of class templates that are function object wrappers.
+# Boost.Function, a polymorphic function wrapper
 
-### License
+[Boost.Function](http://boost.org/libs/function), part of the
+[Boost C++ Libraries](http://boost.org), is the original implementation of the
+polymorphic function wrapper `boost::function`, which was eventually accepted
+into the C++11 standard as [`std::function`](https://en.cppreference.com/w/cpp/utility/functional/function).
 
-Distributed under the [Boost Software License, Version 1.0](http://www.boost.org/LICENSE_1_0.txt).
+## Currently supported compilers
 
-### Properties
+* g++ 4.4 or later
+* clang++ 3.3 or later
+* Visual Studio 2005-2017
 
-* C++03
-* Header-Only
+Tested on [Travis](https://travis-ci.org/boostorg/function/) and [Appveyor](https://ci.appveyor.com/project/pdimov/function/).
 
-### Build Status
-
-Branch          | Travis | Appveyor | Coverity Scan | codecov.io | Deps | Docs | Tests |
-:-------------: | ------ | -------- | ------------- | ---------- | ---- | ---- | ----- |
-[`master`](https://github.com/boostorg/function/tree/master) | [![Build Status](https://travis-ci.org/boostorg/function.svg?branch=master)](https://travis-ci.org/boostorg/function) | [![Build status](https://ci.appveyor.com/api/projects/status/7tgx4ac44fikr87d/branch/master?svg=true)](https://ci.appveyor.com/project/jeking3/function-d036y/branch/master) | [![Coverity Scan Build Status](https://scan.coverity.com/projects/15843/badge.svg)](https://scan.coverity.com/projects/boostorg-function) | [![codecov](https://codecov.io/gh/boostorg/function/branch/master/graph/badge.svg)](https://codecov.io/gh/boostorg/function/branch/master)| [![Deps](https://img.shields.io/badge/deps-master-brightgreen.svg)](https://pdimov.github.io/boostdep-report/master/function.html) | [![Documentation](https://img.shields.io/badge/docs-master-brightgreen.svg)](http://www.boost.org/doc/libs/master/doc/html/function.html) | [![Enter the Matrix](https://img.shields.io/badge/matrix-master-brightgreen.svg)](http://www.boost.org/development/tests/master/developer/function.html)
-[`develop`](https://github.com/boostorg/function/tree/develop) | [![Build Status](https://travis-ci.org/boostorg/function.svg?branch=develop)](https://travis-ci.org/boostorg/function) | [![Build status](https://ci.appveyor.com/api/projects/status/7tgx4ac44fikr87d/branch/develop?svg=true)](https://ci.appveyor.com/project/jeking3/function-d036y/branch/develop) | [![Coverity Scan Build Status](https://scan.coverity.com/projects/15843/badge.svg)](https://scan.coverity.com/projects/boostorg-function) | [![codecov](https://codecov.io/gh/boostorg/function/branch/develop/graph/badge.svg)](https://codecov.io/gh/boostorg/function/branch/develop) | [![Deps](https://img.shields.io/badge/deps-develop-brightgreen.svg)](https://pdimov.github.io/boostdep-report/develop/function.html) | [![Documentation](https://img.shields.io/badge/docs-develop-brightgreen.svg)](http://www.boost.org/doc/libs/develop/doc/html/function.html) | [![Enter the Matrix](https://img.shields.io/badge/matrix-develop-brightgreen.svg)](http://www.boost.org/development/tests/develop/developer/function.html)
-
-### Directories
-
-| Name        | Purpose                        |
-| ----------- | ------------------------------ |
-| `doc`       | documentation                  |
-| `example`   | examples                       |
-| `include`   | headers                        |
-| `test`      | unit tests                     |
-
-### More information
-
-* [Ask questions](http://stackoverflow.com/questions/ask?tags=c%2B%2B,boost,boost-function)
-* [Report bugs](https://github.com/boostorg/function/issues): Be sure to mention Boost version, platform and compiler you're using. A small compilable code sample to reproduce the problem is always good as well.
-* Submit your patches as pull requests against **develop** branch. Note that by submitting patches you agree to license your modifications under the [Boost Software License, Version 1.0](http://www.boost.org/LICENSE_1_0.txt).
-* Discussions about the library are held on the [Boost developers mailing list](http://www.boost.org/community/groups.html#main). Be sure to read the [discussion policy](http://www.boost.org/community/policy.html) before posting and add the `[function]` tag at the beginning of the subject line.
+## License
 
+Distributed under the [Boost Software License, Version 1.0](http://boost.org/LICENSE_1_0.txt).

appveyor.yml

@@ -1,126 +1,69 @@
-# Copyright 2016, 2017 Peter Dimov
-# Copyright (C) 2017, 2018 James E. King III
+# Copyright 2016-2019 Peter Dimov
 # Distributed under the Boost Software License, Version 1.0.
 # (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
 
-#
-# Generic Appveyor build script for boostorg repositories
-# See: https://github.com/jeking3/boost-ci/
-#
-# Instructions for customizing this script for your library:
-#
-# 1. Customize the compilers and language levels you want.
-# 2. If you have move than include/, src/, test/, example/, examples/,
-#    benchmark/ or tools/ directories, set the environment variable DEPINST.
-#    For example if your build uses code in "bench/" and "fog/" directories:
-#      - DEPINST: --include bench --include fog
-# 3. Enable pull request builds in your boostorg/<library> account.
-#
-# That's it - the script will do everything else for you.
-#
-
 version: 1.0.{build}-{branch}
 
 shallow_clone: true
 
 branches:
   only:
-    - develop
     - master
-
-matrix:
-  # Adding MAYFAIL to any matrix job allows it to fail but the build stays green:
-  allow_failures:
-    - MAYFAIL: true
+    - develop
+    - /feature\/.*/
 
 environment:
-  global:
-    # see: http://www.boost.org/build/doc/html/bbv2/overview/invocation.html#bbv2.overview.invocation.properties
-    # to use the default for a given environment, comment it out; recommend you build debug and release however:
-    # on Windows it is important to exercise all the possibilities, especially shared vs static, however most
-    # libraries that care about this exercise it in their Jamfiles...
-    # B2_ADDRESS_MODEL: address-model=64,32
-    # B2_LINK: link=shared,static
-    # B2_THREADING: threading=multi,single
-    B2_VARIANT: variant=release,debug
-
   matrix:
-    - FLAVOR: Visual Studio 2017 C++2a Strict
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-9.0,msvc-10.0,msvc-11.0
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-12.0,msvc-14.0
+      ADDRMD: 32,64
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       TOOLSET: msvc-14.1
-      B2_ADDRESS_MODEL: address-model=64
-      CXXFLAGS: cxxflags=-permissive-
-      CXXSTD: latest # 2a
-
-    - FLAVOR: Visual Studio 2017 C++17
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      TOOLSET: msvc-14.1
-      B2_ADDRESS_MODEL: address-model=64
-      CXXSTD: 17
-
-    - FLAVOR: Visual Studio 2017 C++14 (Default)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      TOOLSET: msvc-14.1
-      B2_ADDRESS_MODEL: address-model=64,32
-
-    - FLAVOR: Visual Studio 2015 C++14 (Default)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      TOOLSET: msvc-14.0
-      B2_ADDRESS_MODEL: address-model=64,32
-
-    - FLAVOR: Visual Studio 2010, 2012, 2013
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
-      TOOLSET: msvc-10.0,msvc-11.0,msvc-12.0
-
-    - FLAVOR: cygwin (32-bit)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      CXXSTD: 14,17
+      ADDRMD: 32,64
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: clang-win
+      CXXSTD: 14,17
+      ADDRMD: 64
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+      TOOLSET: msvc-14.2
+      CXXSTD: 14,17
+      ADDRMD: 32,64
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
       ADDPATH: C:\cygwin\bin;
-      B2_ADDRESS_MODEL: address-model=32
-      CXXSTD: 03,11
-      # https://github.com/boostorg/test/issues/144
-      DEFINES: define=_POSIX_C_SOURCE=200112L
-      THREADING: threadapi=pthread
       TOOLSET: gcc
-
-    - FLAVOR: cygwin (64-bit)
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      CXXSTD: 03,11,14,1z
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
       ADDPATH: C:\cygwin64\bin;
-      B2_ADDRESS_MODEL: address-model=64
-      CXXSTD: 11,17
-      # https://github.com/boostorg/test/issues/144
-      DEFINES: define=_POSIX_C_SOURCE=200112L define=__USE_ISOC99
-      THREADING: threadapi=pthread
       TOOLSET: gcc
-
-    - FLAVOR: mingw32
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      ARCH: i686
-      B2_ADDRESS_MODEL: address-model=32
-      CXXSTD: 03,11
-      SCRIPT: ci\appveyor\mingw.bat
-
-    - FLAVOR: mingw64
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      ARCH: x86_64
-      B2_ADDRESS_MODEL: address-model=64
-      CXXSTD: 11,17
-      DEFINES: define=__USE_ISOC99
-      SCRIPT: ci\appveyor\mingw.bat
+      CXXSTD: 03,11,14,1z
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      ADDPATH: C:\mingw\bin;
+      TOOLSET: gcc
+      CXXSTD: 03,11,14,1z
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      ADDPATH: C:\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64\bin;
+      TOOLSET: gcc
+      CXXSTD: 03,11,14,1z
 
 install:
-  - set SELF=%APPVEYOR_PROJECT_NAME:-=_%
-  - git clone https://github.com/jeking3/boost-ci.git C:\boost-ci
-  - xcopy /s /e /q /i C:\boost-ci\ci .\ci
-  - ci\appveyor\install.bat
+  - set BOOST_BRANCH=develop
+  - if "%APPVEYOR_REPO_BRANCH%" == "master" set BOOST_BRANCH=master
+  - cd ..
+  - git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
+  - cd boost-root
+  - git submodule update --init tools/boostdep
+  - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\function\
+  - python tools/boostdep/depinst/depinst.py function
+  - cmd /c bootstrap
+  - b2 -d0 headers
 
 build: off
 
 test_script:
-  - set SELF=%APPVEYOR_PROJECT_NAME:-=_%
   - PATH=%ADDPATH%%PATH%
-  # The definition of TOOLCXX omits CXXSTD= if it was not defined above
-  - IF NOT DEFINED CXXSTD (SET TOOLCXX=toolset=%TOOLSET%) ELSE (SET TOOLCXX=toolset=%TOOLSET% cxxstd=%CXXSTD%)
-  # Echo the complete build command to the build log
-  - IF NOT DEFINED SCRIPT                         (ECHO b2 libs/%SELF:\=/% %TOOLCXX% %CXXFLAGS% %DEFINES% %THREADING% %B2_ADDRESS_MODEL% %B2_LINK% %B2_THREADING% %B2_VARIANT% -j3)
-  # Now go build...
-  - IF DEFINED SCRIPT (call libs\%SELF%\%SCRIPT%) ELSE (b2 libs/%SELF:\=/% %TOOLCXX% %CXXFLAGS% %DEFINES% %THREADING% %B2_ADDRESS_MODEL% %B2_LINK% %B2_THREADING% %B2_VARIANT% -j3)
+  - if not "%CXXSTD%" == "" set CXXSTD=cxxstd=%CXXSTD%
+  - if not "%ADDRMD%" == "" set ADDRMD=address-model=%ADDRMD%
+  - b2 -j3 libs/function/test toolset=%TOOLSET% %CXXSTD% %ADDRMD% variant=debug,release

example/Jamfile

@@ -0,0 +1,14 @@
+# Boost.Function Library example Jamfile
+#
+# Copyright (c) 2008 James E. King III
+#
+# 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
+
+import ../../config/checks/config : requires ;
+import testing ;
+
+run bind1st.cpp : : : [ requires cxx98_binders ] ;
+run int_div.cpp ;
+run sum_avg.cpp ;

example/Jamfile.v2

@@ -1,21 +0,0 @@
-#  Boost.Function Library example Jamfile
-#
-#  Copyright (c) 2008 James E. King III
-#
-#  Distributed under the Boost Software License, Version 1.0. (See accompany-
-#  ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-import ../../config/checks/config : requires ;
-import os ;
-import testing ;
-
-project
-    :   requirements
-    ;
-
-test-suite "function-examples"
-   :    [ run bind1st.cpp : : : [ requires cxx98_binders ] ]
-        [ run int_div.cpp ]
-        [ run sum_avg.cpp ]
-   ;
-

include/boost/function/function_base.hpp

@@ -396,16 +396,12 @@ namespace boost {
                functor_manager_operation_type op)
         {
           typedef typename get_function_tag<functor_type>::type tag_type;
-          switch (op) {
-          case get_functor_type_tag:
+          if (op == get_functor_type_tag) {
             out_buffer.members.type.type = &boost::typeindex::type_id<functor_type>().type_info();
             out_buffer.members.type.const_qualified = false;
             out_buffer.members.type.volatile_qualified = false;
-            return;
-
-          default:
+          } else {
             manager(in_buffer, out_buffer, op, tag_type());
-            return;
           }
         }
       };
@@ -510,16 +506,12 @@ namespace boost {
                functor_manager_operation_type op)
         {
           typedef typename get_function_tag<functor_type>::type tag_type;
-          switch (op) {
-          case get_functor_type_tag:
+          if (op == get_functor_type_tag) {
             out_buffer.members.type.type = &boost::typeindex::type_id<functor_type>().type_info();
             out_buffer.members.type.const_qualified = false;
             out_buffer.members.type.volatile_qualified = false;
-            return;
-
-          default:
+          } else {
             manager(in_buffer, out_buffer, op, tag_type());
-            return;
           }
         }
       };

include/boost/function/function_template.hpp

@@ -898,11 +898,20 @@ namespace boost {
     {
       if (!f.empty()) {
         this->vtable = f.vtable;
-        if (this->has_trivial_copy_and_destroy())
+        if (this->has_trivial_copy_and_destroy()) {
           // Don't operate on storage directly since union type doesn't relax
           // strict aliasing rules, despite of having member char type.
+#         if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
+#           pragma GCC diagnostic push
+            // This warning is technically correct, but we don't want to pay the price for initializing
+            // just to silence a warning: https://github.com/boostorg/function/issues/27
+#           pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#         endif
           std::memcpy(this->functor.data, f.functor.data, sizeof(boost::detail::function::function_buffer));
-        else
+#         if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
+#           pragma GCC diagnostic pop
+#         endif
+        } else
           get_vtable()->base.manager(f.functor, this->functor,
                                      boost::detail::function::clone_functor_tag);
       }
@@ -987,11 +996,20 @@ namespace boost {
       BOOST_TRY {
         if (!f.empty()) {
           this->vtable = f.vtable;
-          if (this->has_trivial_copy_and_destroy())
+          if (this->has_trivial_copy_and_destroy()) {
             // Don't operate on storage directly since union type doesn't relax
             // strict aliasing rules, despite of having member char type.
+#           if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
+#             pragma GCC diagnostic push
+              // This warning is technically correct, but we don't want to pay the price for initializing
+              // just to silence a warning: https://github.com/boostorg/function/issues/27
+#             pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#           endif
             std::memcpy(this->functor.data, f.functor.data, sizeof(this->functor.data));
-          else
+#           if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
+#             pragma GCC diagnostic pop
+#           endif
+          } else
             get_vtable()->base.manager(f.functor, this->functor,
                                      boost::detail::function::move_functor_tag);
           f.vtable = 0;

meta/libraries.json

@@ -13,6 +13,6 @@
         "Programming"
     ],
     "maintainers": [
-        "Douglas Gregor <dgregor -at- cs.indiana.edu>"
+        "Peter Dimov <pdimov -at- pdimov.com>"
     ]
 }

test/Jamfile.v2

@@ -57,3 +57,19 @@ local check14 = [ check-target-builds mixed_cxxstd/<cxxstd>14 : : <build>no ] ;
 
 run test_mixed_cxxstd.cpp mixed_cxxstd/<cxxstd>14 : : : <link>shared $(check14) : mixed_cxxstd_shared_14 ;
 run test_mixed_cxxstd.cpp mixed_cxxstd/<cxxstd>14 : : : <link>static $(check14) : mixed_cxxstd_static_14 ;
+
+lib return_function : return_function.cpp : <link>shared:<define>RETURN_FUNCTION_DYN_LINK=1 ;
+
+run test_return_function.cpp return_function : : : <link>shared : return_function_shared ;
+run test_return_function.cpp return_function : : : <link>static : return_function_static ;
+
+run test_return_function.cpp return_function/<cxxstd>98 : : : <link>shared : return_function_shared_98 ;
+run test_return_function.cpp return_function/<cxxstd>98 : : : <link>static : return_function_static_98 ;
+
+run test_return_function.cpp return_function/<cxxstd>0x : : : <link>shared : return_function_shared_0x ;
+run test_return_function.cpp return_function/<cxxstd>0x : : : <link>static : return_function_static_0x ;
+
+run test_return_function.cpp return_function/<cxxstd>14 : : : <link>shared $(check14) : return_function_shared_14 ;
+run test_return_function.cpp return_function/<cxxstd>14 : : : <link>static $(check14) : return_function_static_14 ;
+
+run quick.cpp ;

test/cmake_subdir_test/CMakeLists.txt

@@ -0,0 +1,49 @@
+# Copyright 2018, 2019 Peter Dimov
+# 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
+
+cmake_minimum_required(VERSION 3.5)
+
+project(cmake_subdir_test LANGUAGES CXX)
+
+add_subdirectory(../.. boostorg/function)
+
+# boost_add_subdir
+
+function(boost_add_subdir name)
+
+    add_subdirectory(../../../${name} boostorg/${name})
+
+endfunction()
+
+# primary dependencies
+
+boost_add_subdir(assert)
+boost_add_subdir(bind)
+boost_add_subdir(config)
+boost_add_subdir(core)
+boost_add_subdir(integer)
+boost_add_subdir(preprocessor)
+boost_add_subdir(throw_exception)
+boost_add_subdir(type_index)
+boost_add_subdir(type_traits)
+boost_add_subdir(typeof)
+
+# secondary dependencies
+
+boost_add_subdir(static_assert)
+boost_add_subdir(container_hash)
+boost_add_subdir(smart_ptr)
+boost_add_subdir(detail)
+boost_add_subdir(move)
+boost_add_subdir(predef)
+
+# --target check
+
+add_executable(quick ../quick.cpp)
+target_link_libraries(quick Boost::function Boost::core)
+
+enable_testing()
+add_test(quick quick)
+
+add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)

test/contains_test.cpp

@@ -5,10 +5,12 @@
 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
 //  http://www.boost.org/LICENSE_1_0.txt)
 
-#include <boost/test/minimal.hpp>
 #include <boost/function.hpp>
+#include <boost/core/lightweight_test.hpp>
 #include <boost/ref.hpp>
 
+#define BOOST_CHECK BOOST_TEST
+
 static int forty_two() { return 42; }
 
 struct Seventeen
@@ -225,11 +227,11 @@ static void ref_equal_test()
 #endif
 }
 
-int test_main(int, char*[])
+int main()
 {
   target_test();
   equal_test();
   ref_equal_test();
 
-  return 0;
+  return boost::report_errors();
 }

test/function_n_test.cpp

@@ -7,12 +7,14 @@
 
 // For more information, see http://www.boost.org
 
-#include <boost/test/minimal.hpp>
 #include <boost/function.hpp>
+#include <boost/core/lightweight_test.hpp>
 #include <functional>
 #include <cassert>
 #include <string>
 
+#define BOOST_CHECK BOOST_TEST
+
 using namespace boost;
 using std::string;
 using std::negate;
@@ -684,7 +686,7 @@ void test_construct_destroy_count()
    BOOST_CHECK(construction_count == destruction_count);
 }
 
-int test_main(int, char* [])
+int main()
 {
   test_zero_args();
   test_one_arg();
@@ -693,5 +695,5 @@ int test_main(int, char* [])
   test_member_functions();
   test_ref();
   test_construct_destroy_count();
-  return 0;
+  return boost::report_errors();
 }

test/function_test.cpp

@@ -7,12 +7,14 @@
 
 // For more information, see http://www.boost.org
 
-#include <boost/test/minimal.hpp>
 #include <boost/function.hpp>
+#include <boost/core/lightweight_test.hpp>
 #include <functional>
 #include <string>
 #include <utility>
 
+#define BOOST_CHECK BOOST_TEST
+
 using boost::function;
 using std::string;
 
@@ -792,7 +794,7 @@ static void test_move_semantics()
 #endif  
 }
 
-int test_main(int, char* [])
+int main()
 {
   test_zero_args();
   test_one_arg();
@@ -807,5 +809,5 @@ int test_main(int, char* [])
   test_move_semantics<function<void()> >();
   test_move_semantics<boost::function0<void> >();
 
-  return 0;
+  return boost::report_errors();
 }

test/function_test_fail1.cpp

@@ -7,22 +7,12 @@
 
 // For more information, see http://www.boost.org
 
-#include <boost/test/minimal.hpp>
 #include <boost/function.hpp>
 
-using namespace std;
-using namespace boost;
-
-int
-test_main(int, char*[])
+void test()
 {
-  function0<int> f1;
-  function0<int> f2;
+    boost::function0<int> f1;
+    boost::function0<int> f2;
 
-  if (f1 == f2) {
-  }
-
-  BOOST_ERROR("This should not have compiled.");
-
-  return 0;
+    if( f1 == f2 ) {}
 }

test/function_test_fail2.cpp

@@ -7,21 +7,12 @@
 
 // For more information, see http://www.boost.org
 
-#include <boost/test/minimal.hpp>
 #include <boost/function.hpp>
 
-using namespace std;
-using namespace boost;
-
 static int bad_fn(float f) { return static_cast<int>(f); }
 
-int
-test_main(int, char*[])
+void test()
 {
-  function0<int> f1;
-  f1 = bad_fn;
-
-  BOOST_ERROR("This should not have compiled.");
-
-  return 0;
+    boost::function0<int> f1;
+    f1 = bad_fn;
 }

test/nothrow_swap.cpp

@@ -7,8 +7,10 @@
 
 // For more information, see http://www.boost.org
 
-#include <boost/test/minimal.hpp>
 #include <boost/function.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#define BOOST_CHECK BOOST_TEST
 
 struct tried_to_copy { };
 
@@ -40,7 +42,7 @@ struct MaybeThrowOnCopy {
 
 bool MaybeThrowOnCopy::throwOnCopy = false;
 
-int test_main(int, char* [])
+int main()
 {
   boost::function0<int> f;
   boost::function0<int> g;
@@ -56,5 +58,5 @@ int test_main(int, char* [])
   BOOST_CHECK(f() == 2);
   BOOST_CHECK(g() == 1);
   
-  return 0;
+  return boost::report_errors();
 }

test/quick.cpp

@@ -0,0 +1,21 @@
+// Copyright 2019 Peter Dimov
+
+// 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
+
+#include <boost/function.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+static int f( int x )
+{
+    return x + 1;
+}
+
+int main()
+{
+    boost::function<int(int)> fn( f );
+
+    BOOST_TEST_EQ( fn( 5 ), 6 );
+
+    return boost::report_errors();
+}

test/return_function.cpp

@@ -0,0 +1,27 @@
+
+// Copyright 2018 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+
+#include <boost/function.hpp>
+#include <boost/config.hpp>
+
+#if defined(RETURN_FUNCTION_DYN_LINK)
+# define EXPORT BOOST_SYMBOL_EXPORT
+#else
+# define EXPORT
+#endif
+
+int f( int x, int y )
+{
+    return x + y;
+}
+
+EXPORT boost::function<int(int, int)> get_fn_1()
+{
+    return f;
+}
+
+EXPORT boost::function2<int, int, int> get_fn_2()
+{
+    return f;
+}

test/rvalues_test.cpp

@@ -6,12 +6,13 @@
 
 // For more information, see http://www.boost.org
 
+#include <boost/function.hpp>
+#include <boost/move/move.hpp>
+#include <boost/core/lightweight_test.hpp>
 #include <iostream>
 #include <cstdlib>
 
-#include <boost/test/minimal.hpp>
-#include <boost/function.hpp>
-#include <boost/move/move.hpp>
+#define BOOST_CHECK BOOST_TEST
 
 class only_movable {
 private:
@@ -63,7 +64,7 @@ int three(std::string&&) { return 1; }
 std::string&& four(std::string&& s) { return boost::move(s); }
 #endif
 
-int test_main(int, char*[])
+int main()
 {
     using boost::function;
 
@@ -102,5 +103,5 @@ int test_main(int, char*[])
     BOOST_CHECK(f4(std::string("world")) == "world");
 #endif
 
-    return 0;
+    return boost::report_errors();
 }

test/test_return_function.cpp

@@ -0,0 +1,21 @@
+
+// Copyright 2018 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+
+#include <boost/function.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+//
+
+boost::function<int(int, int)> get_fn_1();
+boost::function2<int, int, int> get_fn_2();
+
+//
+
+int main()
+{
+    BOOST_TEST_EQ( get_fn_1()( 1, 2 ), 3 );
+    BOOST_TEST_EQ( get_fn_2()( 1, 2 ), 3 );
+
+    return boost::report_errors();
+}