Add a Github Actions config

.github/workflows/tests.yml

@@ -0,0 +1,55 @@
+name: Hana CI
+
+permissions:
+  contents: read
+
+on: pull_request
+
+jobs:
+  tests:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: macos-latest
+            xcode-version: latest-stable
+          - os: macos-latest
+            compiler: llvm
+          # - os: macos-latest
+          #   compiler: gcc
+          # - os: windows-latest
+          #   compiler: llvm
+          - os: ubuntu-latest
+            compiler: llvm
+          # - os: ubuntu-latest
+          #   compiler: gcc
+
+    steps:
+      - name: Setup build environment
+        uses: aminya/setup-cpp@v1
+        with:
+          vcvarsall: ${{ contains(matrix.os, 'windows') }}
+          cmake: true
+          ninja: true
+
+      - name: Setup compiler
+        uses: aminya/setup-cpp@v1
+        if: ${{ matrix.compiler }}
+        with:
+          compiler: ${{ matrix.compiler }}
+
+      - name: Install Xcode
+        uses: maxim-lobanov/setup-xcode@v1
+        if: ${{ matrix.xcode-version }}
+        with:
+          xcode-version: ${{ matrix.xcode-version }}
+
+      - name: Checkout source code
+        uses: actions/checkout@v3
+
+      - name: Configure CMake
+        run: mkdir build && cmake -S . -B build -G Ninja
+
+      - name: Run the tests
+        run: cmake --build build --target check

CMakeLists.txt

@@ -112,7 +112,6 @@ function(boost_hana_set_test_properties target)
     if (NOT MSVC)
         setflag(BOOST_HANA_HAS_FDIAGNOSTICS_COLOR         -fdiagnostics-color)
         setflag(BOOST_HANA_HAS_FTEMPLATE_BACKTRACE_LIMIT  -ftemplate-backtrace-limit=0)
-        setflag(BOOST_HANA_HAS_PEDANTIC                   -pedantic)
         setflag(BOOST_HANA_HAS_WALL                       -Wall)
         setflag(BOOST_HANA_HAS_WERROR                     -Werror)
         setflag(BOOST_HANA_HAS_WEXTRA                     -Wextra)

include/boost/hana/config.hpp

@@ -46,11 +46,13 @@ Distributed under the Boost Software License, Version 1.0.
 
 #elif defined(__clang__) && defined(_MSC_VER) // Clang-cl (Clang for Windows)
 
+#   define BOOST_HANA_CONFIG_CLANG_CL
 #   define BOOST_HANA_CONFIG_CLANG BOOST_HANA_CONFIG_VERSION(               \
                     __clang_major__, __clang_minor__, __clang_patchlevel__)
 
 #elif defined(__clang__) && defined(__apple_build_version__) // Apple's Clang
 
+#   define BOOST_HANA_CONFIG_APPLE_CLANG
 #   if __apple_build_version__ >= 6020049
 #       define BOOST_HANA_CONFIG_CLANG BOOST_HANA_CONFIG_VERSION(3, 6, 0)
 #   endif

include/boost/hana/experimental/type_name.hpp

@@ -26,18 +26,23 @@ namespace boost { namespace hana { namespace experimental {
 
         // Note: We substract the null terminator from the string sizes below.
         template <typename T>
-        constexpr cstring type_name_impl2() {
-
-        #if defined(__clang__)
+        constexpr auto type_name_impl2() {
+        #if defined(BOOST_HANA_CONFIG_CLANG)
+            constexpr char const* pretty_function = __PRETTY_FUNCTION__;
+            constexpr std::size_t total_size = sizeof(__PRETTY_FUNCTION__) - 1;
+            constexpr std::size_t prefix_size = sizeof("auto boost::hana::experimental::detail::type_name_impl2() [T = ") - 1;
+            constexpr std::size_t suffix_size = sizeof("]") - 1;
+        #elif defined(BOOST_HANA_CONFIG_GCC)
             constexpr char const* pretty_function = __PRETTY_FUNCTION__;
             constexpr std::size_t total_size = sizeof(__PRETTY_FUNCTION__) - 1;
-            constexpr std::size_t prefix_size = sizeof("cstring boost::hana::experimental::detail::type_name_impl2() [T = ") - 1;
+            constexpr std::size_t prefix_size = sizeof("constexpr auto boost::hana::experimental::detail::type_name_impl2() [with T = ") - 1;
             constexpr std::size_t suffix_size = sizeof("]") - 1;
         #else
             #error "No support for this compiler."
         #endif
 
-            return {pretty_function + prefix_size, total_size - prefix_size - suffix_size};
+            cstring s{pretty_function + prefix_size, total_size - prefix_size - suffix_size};
+            return s;
         }
 
         template <typename T, std::size_t ...i>

test/CMakeLists.txt

@@ -28,17 +28,6 @@ if (NOT Boost_FOUND)
     list(APPEND EXCLUDED_PUBLIC_HEADERS ${PUBLIC_HEADERS_REQUIRING_BOOST})
 endif()
 
-# On Windows, Clang-cl emulates a MSVC bug that causes EBO not to be applied
-# properly. We disable the tests that check for EBO.
-if (MSVC AND ${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang")
-    list(APPEND EXCLUDED_UNIT_TESTS
-        "detail/ebo.cpp"
-        "issues/github_202.cpp"
-        "pair/empty_storage.cpp"
-        "tuple/empty_member.cpp"
-    )
-endif()
-
 
 ##############################################################################
 # Generate tests that include each public header.

test/Jamfile.v2

@@ -14,8 +14,8 @@ project boost/hana :
 
 rule hana-all-tests {
     local toolset =
-        <toolset>clang:<cxxflags>"-std=c++1y -pedantic -Wall -Wextra"
-        <toolset>darwin:<cxxflags>"-std=c++1y -pedantic -Wall -Wextra"
+        <toolset>clang:<cxxflags>"-std=c++1y -Wall -Wextra"
+        <toolset>darwin:<cxxflags>"-std=c++1y -Wall -Wextra"
         [ requires
             cxx14_constexpr
             cxx14_decltype_auto

test/detail/ebo.cpp

@@ -21,10 +21,11 @@ template <typename ...Bases> struct __declspec(empty_bases) inherit : Bases... {
 template <typename ...Bases> struct inherit : Bases... { };
 #endif
 
+#ifndef BOOST_HANA_CONFIG_CLANG_CL // MSVC doesn't implement EBO in all cases
 static_assert(sizeof(inherit<>) == sizeof(inherit<ebo<idx<0>, empty<0>>>), "");
 static_assert(sizeof(inherit<>) == sizeof(inherit<ebo<idx<0>, empty<0>>, ebo<idx<1>, empty<1>>>), "");
 static_assert(sizeof(inherit<>) == sizeof(inherit<ebo<idx<0>, empty<0>>, ebo<idx<1>, empty<1>>, ebo<idx<2>, empty<2>>>), "");
-
+#endif
 
 int main() {
     // Test default-construction

test/issues/github_202.cpp

@@ -2,6 +2,10 @@
 // Distributed under the Boost Software License, Version 1.0.
 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
 
+#include <boost/hana/config.hpp>
+
+#ifndef BOOST_HANA_CONFIG_CLANG_CL // EBO is not well supported on Windows
+
 #include <boost/hana/integral_constant.hpp>
 #include <boost/hana/pair.hpp>
 #include <boost/hana/tuple.hpp>
@@ -23,4 +27,6 @@ static_assert(
     sizeof(hana::tuple<Vector, Vector, Vector, Vector>)
 , "");
 
+#endif // BOOST_HANA_CONFIG_CLANG_CL
+
 int main() { }