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:
@@ -292,7 +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:

appveyor.yml

@@ -23,6 +23,14 @@ 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
+      CXXSTD: 14,17
+      ADDRMD: 32,64
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
       ADDPATH: C:\cygwin\bin;
       TOOLSET: gcc

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;