Keep -Wmaybe-uninitialized disabled

.github/workflows/ci.yml

@@ -20,33 +20,48 @@ jobs:
           - toolset: gcc-4.8
             cxxstd: "03,11"
             os: ubuntu-18.04
-            install: g++-4.8
+            install: g++-4.8-multilib
+            address-model: 32,64
           - toolset: gcc-5
             cxxstd: "03,11,14,1z"
             os: ubuntu-18.04
-            install: g++-5
+            install: g++-5-multilib
+            address-model: 32,64
           - toolset: gcc-6
             cxxstd: "03,11,14,1z"
             os: ubuntu-18.04
-            install: g++-6
+            install: g++-6-multilib
+            address-model: 32,64
           - toolset: gcc-7
             cxxstd: "03,11,14,17"
             os: ubuntu-18.04
+            install: g++-7-multilib
+            address-model: 32,64
           - toolset: gcc-8
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-18.04
-            install: g++-8
+            install: g++-8-multilib
+            address-model: 32,64
           - toolset: gcc-9
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-20.04
+            install: g++-9-multilib
+            address-model: 32,64
           - toolset: gcc-10
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-20.04
-            install: g++-10
+            install: g++-10-multilib
+            address-model: 32,64
           - toolset: gcc-11
-            cxxstd: "03,11,14,17,2a"
+            cxxstd: "03,11,14,17,20"
             os: ubuntu-20.04
-            install: g++-11
+            install: g++-11-multilib
+            address-model: 32,64
+          - toolset: gcc-12
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-22.04
+            install: g++-12-multilib
+            address-model: 32,64
           - toolset: clang
             compiler: clang++-3.9
             cxxstd: "03,11,14"
@@ -92,8 +107,18 @@ jobs:
             os: ubuntu-20.04
           - toolset: clang
             compiler: clang++-12
-            cxxstd: "03,11,14,17,2a"
+            cxxstd: "03,11,14,17,20"
             os: ubuntu-20.04
+          - toolset: clang
+            compiler: clang++-13
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-22.04
+            install: clang-13
+          - toolset: clang
+            compiler: clang++-14
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-22.04
+            install: clang-14
           - toolset: clang
             cxxstd: "03,11,14,17,2a"
             os: macos-10.15
@@ -137,7 +162,8 @@ jobs:
       - name: Run tests
         run: |
           cd ../boost-root
-          ./b2 -j3 libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} variant=debug,release
+          export ADDRMD=${{matrix.address-model}}
+          ./b2 -j3 libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} ${ADDRMD:+address-model=$ADDRMD} variant=debug,release
 
   windows:
     strategy:
@@ -145,18 +171,18 @@ jobs:
       matrix:
         include:
           - toolset: msvc-14.0
-            cxxstd: "14"
+            cxxstd: 14,latest
             addrmd: 32,64
             os: windows-2019
-          - toolset: msvc-14.1
-            cxxstd: "14,17,latest"
-            addrmd: 32,64
-            os: windows-2016
           - toolset: msvc-14.2
-            cxxstd: "14,17,latest"
+            cxxstd: "14,17,20,latest"
             addrmd: 32,64
             os: windows-2019
           - toolset: msvc-14.3
+            cxxstd: "14,17,20,latest"
+            addrmd: 32,64
+            os: windows-2022
+          - toolset: clang-win
             cxxstd: "14,17,latest"
             addrmd: 32,64
             os: windows-2022
@@ -196,7 +222,7 @@ jobs:
         shell: cmd
         run: |
           cd ../boost-root
-          b2 -j3 libs/%LIBRARY%/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} address-model=${{matrix.addrmd}} variant=debug,release
+          b2 -j3 libs/%LIBRARY%/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} address-model=${{matrix.addrmd}} variant=debug,release embed-manifest-via=linker
 
   posix-cmake-subdir:
     strategy:

README.md

@@ -7,11 +7,11 @@ into the C++11 standard as [`std::function`](https://en.cppreference.com/w/cpp/u
 
 ## Currently supported compilers
 
-* g++ 4.4 or later
+* g++ 4.8 or later
-* clang++ 3.3 or later
+* clang++ 3.9 or later
-* Visual Studio 2005-2017
+* Visual Studio 2005-2022
 
-Tested on [Travis](https://travis-ci.org/boostorg/function/) and [Appveyor](https://ci.appveyor.com/project/pdimov/function/).
+Tested on [Github Actions](https://github.com/boostorg/function/actions) and [Appveyor](https://ci.appveyor.com/project/pdimov/function/).
 
 ## License
 

appveyor.yml

@@ -24,14 +24,10 @@ environment:
       TOOLSET: msvc-14.1
       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
+      TOOLSET: clang-win
       CXXSTD: 14,17,latest
-      ADDRMD: 32,64
+      ADDRMD: 64
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
       ADDPATH: C:\cygwin\bin;
       TOOLSET: gcc
@@ -67,4 +63,4 @@ test_script:
   - PATH=%ADDPATH%%PATH%
   - 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
+  - b2 -j3 libs/function/test toolset=%TOOLSET% %CXXSTD% %ADDRMD% variant=debug,release embed-manifest-via=linker

include/boost/function/function_template.hpp

@@ -906,6 +906,10 @@ namespace boost {
             // 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"
+#           if (BOOST_GCC >= 120000)
+              // GCC 12 emits a different warning: https://github.com/boostorg/function/issues/42
+#             pragma GCC diagnostic ignored "-Wuninitialized"
+#           endif
 #         endif
           std::memcpy(this->functor.data, f.functor.data, sizeof(boost::detail::function::function_buffer));
 #         if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
@@ -1004,14 +1008,26 @@ namespace boost {
               // 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"
+#             if (BOOST_GCC >= 120000)
+                // GCC 12 emits a different warning: https://github.com/boostorg/function/issues/42
+#               pragma GCC diagnostic ignored "-Wuninitialized"
+#             endif
 #           endif
             std::memcpy(this->functor.data, f.functor.data, sizeof(this->functor.data));
 #           if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
 #             pragma GCC diagnostic pop
 #           endif
           } else
+#if defined(BOOST_GCC) && (__GNUC__ >= 11)
+# pragma GCC diagnostic push
+// False positive in GCC 11/12 for empty function objects (function_n_test.cpp:673)
+# pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
             get_vtable()->base.manager(f.functor, this->functor,
                                      boost::detail::function::move_functor_tag);
+#if defined(BOOST_GCC) && (__GNUC__ >= 11)
+# pragma GCC diagnostic pop
+#endif
           f.vtable = 0;
         } else {
           clear();

test/Jamfile.v2

@@ -9,6 +9,15 @@
 
 import testing ;
 
+project
+  : default-build
+    <warnings>extra
+  : requirements
+    <toolset>msvc:<warnings-as-errors>on
+    <toolset>gcc:<warnings-as-errors>on
+    <toolset>clang:<warnings-as-errors>on
+  ;
+
 run function_test.cpp ;
 # /usr/include/c++/4.4/bits/shared_ptr.h:146: error: cannot use typeid with -fno-rtti
 run function_test.cpp : : : <rtti>off <toolset>gcc-4.4.7,<cxxstd>0x:<build>no : function_test_no_rtti ;
@@ -73,3 +82,5 @@ run test_return_function.cpp return_function/<cxxstd>14 : : : <link>shared $(che
 run test_return_function.cpp return_function/<cxxstd>14 : : : <link>static $(check14) : return_function_static_14 ;
 
 run quick.cpp ;
+
+compile issue_42.cpp ;

test/function_n_test.cpp

@@ -7,6 +7,12 @@
 
 // For more information, see http://www.boost.org
 
+#if defined(__clang__) && defined(__has_warning)
+# if __has_warning( "-Wself-assign-overloaded" )
+#  pragma clang diagnostic ignored "-Wself-assign-overloaded"
+# endif
+#endif
+
 #include <boost/function.hpp>
 #include <boost/core/lightweight_test.hpp>
 #include <functional>

test/function_test.cpp

@@ -7,6 +7,12 @@
 
 // For more information, see http://www.boost.org
 
+#if defined(__clang__) && defined(__has_warning)
+# if __has_warning( "-Wself-assign-overloaded" )
+#  pragma clang diagnostic ignored "-Wself-assign-overloaded"
+# endif
+#endif
+
 #include <boost/function.hpp>
 #include <boost/core/lightweight_test.hpp>
 #include <functional>

test/issue_42.cpp

@@ -0,0 +1,21 @@
+// Copyright 2022 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+//
+// https://github.com/boostorg/function/issues/42
+
+#include <boost/function.hpp>
+
+struct F
+{
+    int operator()( int x ) const { return -x; }
+};
+
+struct X
+{
+    boost::function<int(int)> f_;
+    explicit X( boost::function<int(int)> f ): f_( f ) {}
+};
+
+F f2;
+X x( f2 ); // -Wuninitialized under GCC 12

test/mem_fun_cxx98.cpp

@@ -16,7 +16,7 @@
 
 struct Y {
     Y(int y = 0) : y_(y) {}
-    bool operator==(const Y& rhs) { return y_ == rhs.y_; }
+    bool operator==(const Y& rhs) const { return y_ == rhs.y_; }
 private:
     int y_;
     };

test/mem_fun_portable.cpp

@@ -16,7 +16,7 @@
 
 struct Y {
     Y(int y = 0) : y_(y) {}
-    bool operator==(const Y& rhs) { return y_ == rhs.y_; }
+    bool operator==(const Y& rhs) const { return y_ == rhs.y_; }
 private:
     int y_;
     };

test/std_bind_cxx98.cpp

@@ -8,6 +8,15 @@
 
 // For more information, see http://www.boost.org/
 
+#if defined(__clang__) && defined(__has_warning)
+# if __has_warning( "-Wdeprecated-declarations" )
+#  pragma clang diagnostic ignored "-Wdeprecated-declarations"
+# endif
+#endif
+
+#if defined(__GNUC__) && __GNUC__ >= 12
+# pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
 
 #include <boost/function.hpp>
 #include <iostream>

test/std_bind_portable.cpp

@@ -8,6 +8,15 @@
 
 // For more information, see http://www.boost.org/
 
+#if defined(__clang__) && defined(__has_warning)
+# if __has_warning( "-Wdeprecated-declarations" )
+#  pragma clang diagnostic ignored "-Wdeprecated-declarations"
+# endif
+#endif
+
+#if defined(__GNUC__) && __GNUC__ >= 12
+# pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
 
 #include <boost/function.hpp>
 #include <iostream>