Update ci.yml

Support parameter packs for bases in BOOST_DESCRIBE_CLASS

.drone.jsonnet

@@ -32,6 +32,8 @@ local linux_pipeline(name, image, environment, packages = "", sources = [], arch
             commands:
             [
                 'set -e',
+                'uname -a',
+                'echo $DRONE_STAGE_MACHINE',
                 'wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -',
             ] +
             (if sources != [] then [ ('apt-add-repository "' + source + '"') for source in sources ] else []) +
@@ -186,6 +188,27 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
         "g++-12",
     ),
 
+    linux_pipeline(
+        "Linux 24.04 GCC 13",
+        "cppalliance/droneubuntu2404:1",
+        { TOOLSET: 'gcc', COMPILER: 'g++-13', CXXSTD: '03,11,14,17,20,2b' },
+        "g++-13",
+    ),
+
+    linux_pipeline(
+        "Linux 24.04 GCC 14 UBSAN",
+        "cppalliance/droneubuntu2404:1",
+        { TOOLSET: 'gcc', COMPILER: 'g++-14', CXXSTD: '03,11,14,17,20,2b' } + ubsan,
+        "g++-14",
+    ),
+
+    linux_pipeline(
+        "Linux 24.04 GCC 14 ASAN",
+        "cppalliance/droneubuntu2404:1",
+        { TOOLSET: 'gcc', COMPILER: 'g++-14', CXXSTD: '03,11,14,17,20,2b' } + asan,
+        "g++-14",
+    ),
+
     linux_pipeline(
         "Linux 16.04 Clang 3.5",
         "cppalliance/droneubuntu1604:1",
@@ -303,18 +326,69 @@ local windows_pipeline(name, image, environment, arch = "amd64") =
         "cppalliance/droneubuntu2204:1",
         { TOOLSET: 'clang', COMPILER: 'clang++-15', CXXSTD: '03,11,14,17,20,2b' },
         "clang-15",
-        ["deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-15 main"],
+    ),
+
+    linux_pipeline(
+        "Linux 24.04 Clang 16",
+        "cppalliance/droneubuntu2404:1",
+        { TOOLSET: 'clang', COMPILER: 'clang++-16', CXXSTD: '03,11,14,17,20,2b' },
+        "clang-16",
+    ),
+
+    linux_pipeline(
+        "Linux 24.04 Clang 17",
+        "cppalliance/droneubuntu2404:1",
+        { TOOLSET: 'clang', COMPILER: 'clang++-17', CXXSTD: '03,11,14,17,20,2b' },
+        "clang-17",
+    ),
+
+    linux_pipeline(
+        "Linux 24.04 Clang 18 UBSAN",
+        "cppalliance/droneubuntu2404:1",
+        { TOOLSET: 'clang', COMPILER: 'clang++-18', CXXSTD: '03,11,14,17,20,2b' } + ubsan,
+        "clang-18",
+    ),
+
+    linux_pipeline(
+        "Linux 24.04 Clang 18 ASAN",
+        "cppalliance/droneubuntu2404:1",
+        { TOOLSET: 'clang', COMPILER: 'clang++-18', CXXSTD: '03,11,14,17,20,2b' } + asan,
+        "clang-18",
+    ),
+
+    linux_pipeline(
+        "Linux 24.10 Clang 19",
+        "cppalliance/droneubuntu2410:1",
+        { TOOLSET: 'clang', COMPILER: 'clang++-19', CXXSTD: '03,11,14,17,20,2b' },
+        "clang-19",
     ),
 
     macos_pipeline(
-        "MacOS 10.15 Xcode 12.2",
-        { TOOLSET: 'clang', COMPILER: 'clang++', CXXSTD: '03,11,14,1z' },
+        "MacOS 10.15 Xcode 12.2 UBSAN",
+        { TOOLSET: 'clang', COMPILER: 'clang++', CXXSTD: '03,11,14,1z' } + ubsan,
+    ),
+
+    macos_pipeline(
+        "MacOS 10.15 Xcode 12.2 ASAN",
+        { TOOLSET: 'clang', COMPILER: 'clang++', CXXSTD: '03,11,14,1z' } + asan,
+    ),
+
+    macos_pipeline(
+        "MacOS 12.4 Xcode 13.4.1 UBSAN",
+        { TOOLSET: 'clang', COMPILER: 'clang++', CXXSTD: '03,11,14,17,20,2b' } + ubsan,
+        xcode_version = "13.4.1", osx_version = "monterey", arch = "arm64",
+    ),
+
+    macos_pipeline(
+        "MacOS 12.4 Xcode 13.4.1 ASAN",
+        { TOOLSET: 'clang', COMPILER: 'clang++', CXXSTD: '03,11,14,17,20,2b' } + asan,
+        xcode_version = "13.4.1", osx_version = "monterey", arch = "arm64",
     ),
 
     windows_pipeline(
         "Windows VS2015 msvc-14.0",
         "cppalliance/dronevs2015",
-        { TOOLSET: 'msvc-14.0', CXXSTD: '14,latest' },
+        { TOOLSET: 'msvc-14.0', CXXSTD: '14,latest', B2_DONT_EMBED_MANIFEST: '1' },
     ),
 
     windows_pipeline(

.drone/drone.sh

@@ -5,6 +5,7 @@
 # https://www.boost.org/LICENSE_1_0.txt
 
 set -ex
+export PATH=~/.local/bin:/usr/local/bin:$PATH
 
 DRONE_BUILD_DIR=$(pwd)
 

.github/workflows/ci.yml

@@ -19,30 +19,33 @@ jobs:
         include:
           - toolset: gcc-4.8
             cxxstd: "03,11"
-            os: ubuntu-latest
             container: ubuntu:18.04
+            os: ubuntu-latest
             install: g++-4.8
           - toolset: gcc-5
             cxxstd: "03,11,14,14-gnu,1z,1z-gnu"
-            os: ubuntu-latest
             container: ubuntu:18.04
+            os: ubuntu-latest
             install: g++-5
           - toolset: gcc-6
             cxxstd: "03,11,14,14-gnu,1z,1z-gnu"
-            os: ubuntu-latest
             container: ubuntu:18.04
+            os: ubuntu-latest
             install: g++-6
           - toolset: gcc-7
             cxxstd: "03,11,14,14-gnu,17,17-gnu"
-            os: ubuntu-20.04
+            container: ubuntu:20.04
+            os: ubuntu-latest
             install: g++-7
           - toolset: gcc-8
             cxxstd: "03,11,14,17,2a"
-            os: ubuntu-20.04
+            container: ubuntu:20.04
+            os: ubuntu-latest
             install: g++-8
           - toolset: gcc-9
             cxxstd: "03,11,14,17,2a"
-            os: ubuntu-20.04
+            container: ubuntu:20.04
+            os: ubuntu-latest
           - toolset: gcc-10
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-22.04
@@ -56,108 +59,153 @@ jobs:
             install: g++-12
           - toolset: gcc-13
             cxxstd: "03,11,14,17,20,2b"
+            container: ubuntu:24.04
             os: ubuntu-latest
-            container: ubuntu:23.04
             install: g++-13
+          - toolset: gcc-14
+            cxxstd: "03,11,14,17,20,2b"
+            container: ubuntu:24.04
+            os: ubuntu-latest
+            install: g++-14
           - toolset: clang
             compiler: clang++-3.9
             cxxstd: "03,11,14"
-            os: ubuntu-latest
             container: ubuntu:18.04
+            os: ubuntu-latest
             install: clang-3.9
           - toolset: clang
             compiler: clang++-4.0
             cxxstd: "03,11,14"
-            os: ubuntu-latest
             container: ubuntu:18.04
+            os: ubuntu-latest
             install: clang-4.0
           - toolset: clang
             compiler: clang++-5.0
-            cxxstd: "03,11,14,1z"
-            os: ubuntu-latest
+            cxxstd: "03,11,14"
             container: ubuntu:18.04
+            os: ubuntu-latest
             install: clang-5.0
           - toolset: clang
             compiler: clang++-6.0
             cxxstd: "03,11,14,17"
-            os: ubuntu-20.04
+            container: ubuntu:20.04
+            os: ubuntu-latest
             install: clang-6.0
           - toolset: clang
             compiler: clang++-7
             cxxstd: "03,11,14,17"
-            os: ubuntu-20.04
+            container: ubuntu:20.04
+            os: ubuntu-latest
             install: clang-7
           - toolset: clang
             compiler: clang++-8
             cxxstd: "03,11,14,17"
-            os: ubuntu-20.04
+            container: ubuntu:20.04
+            os: ubuntu-latest
             install: clang-8
           - toolset: clang
             compiler: clang++-9
             cxxstd: "03,11,14,17,2a"
-            os: ubuntu-20.04
+            container: ubuntu:20.04
+            os: ubuntu-latest
             install: clang-9
           - toolset: clang
             compiler: clang++-10
             cxxstd: "03,11,14,17,2a"
-            os: ubuntu-20.04
+            container: ubuntu:20.04
+            os: ubuntu-latest
             install: clang-10
           - toolset: clang
             compiler: clang++-11
             cxxstd: "03,11,14,17,2a"
-            os: ubuntu-20.04
+            container: ubuntu:20.04
+            os: ubuntu-latest
             install: clang-11
           - toolset: clang
             compiler: clang++-12
             cxxstd: "03,11,14,17,2a"
-            os: ubuntu-20.04
+            container: ubuntu:20.04
+            os: ubuntu-latest
             install: clang-12
           - toolset: clang
             compiler: clang++-13
             cxxstd: "03,11,14,17,20,2b"
-            os: ubuntu-22.04
+            container: ubuntu:22.04
+            os: ubuntu-latest
             install: clang-13
           - toolset: clang
             compiler: clang++-14
             cxxstd: "03,11,14,17,20,2b"
-            os: ubuntu-22.04
+            container: ubuntu:22.04
+            os: ubuntu-latest
             install: clang-14
           - toolset: clang
             compiler: clang++-15
             cxxstd: "03,11,14,17,20,2b"
-            os: ubuntu-22.04
+            container: ubuntu:22.04
+            os: ubuntu-latest
             install: clang-15
           - toolset: clang
             compiler: clang++-16
             cxxstd: "03,11,14,17,20,2b"
+            container: ubuntu:24.04
             os: ubuntu-latest
-            container: ubuntu:23.04
             install: clang-16
           - toolset: clang
-            cxxstd: "03,11,14,17,2a"
-            os: macos-11
-          - toolset: clang
+            compiler: clang++-17
             cxxstd: "03,11,14,17,20,2b"
-            os: macos-12
+            container: ubuntu:24.04
+            os: ubuntu-latest
+            install: clang-17
+          - toolset: clang
+            compiler: clang++-18
+            cxxstd: "03,11,14,17,20,2b"
+            container: ubuntu:24.04
+            os: ubuntu-latest
+            install: clang-18
+          - toolset: clang
+            compiler: clang++-19
+            cxxstd: "03,11,14,17,20,2b"
+            container: ubuntu:24.04
+            os: ubuntu-latest
+            install: clang-19
           - toolset: clang
             cxxstd: "03,11,14,17,20,2b"
             os: macos-13
+          - toolset: clang
+            cxxstd: "03,11,14,17,20,2b"
+            os: macos-14
+          - toolset: clang
+            cxxstd: "03,11,14,17,20,2b"
+            os: macos-15
 
     runs-on: ${{matrix.os}}
-    container: ${{matrix.container}}
+
+    container:
+      image: ${{matrix.container}}
+      volumes:
+        - /node20217:/node20217:rw,rshared
+        - ${{ startsWith(matrix.container, 'ubuntu:1') && '/node20217:/__e/node20:ro,rshared' || ' ' }}
 
     defaults:
       run:
         shell: bash
 
     steps:
-      - uses: actions/checkout@v3
-
       - name: Setup container environment
         if: matrix.container
         run: |
           apt-get update
-          apt-get -y install sudo python3 git g++
+          apt-get -y install sudo python3 git g++ curl xz-utils
+
+      - name: Install nodejs20glibc2.17
+        if: ${{ startsWith( matrix.container, 'ubuntu:1' ) }}
+        run: |
+          curl -LO https://archives.boost.io/misc/node/node-v20.9.0-linux-x64-glibc-217.tar.xz
+          tar -xf node-v20.9.0-linux-x64-glibc-217.tar.xz --strip-components 1 -C /node20217
+          ldd /__e/node20/bin/node
+
+      - uses: actions/checkout@v4
 
       - name: Install packages
         if: matrix.install
@@ -237,7 +285,7 @@ jobs:
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Boost
         shell: cmd
@@ -273,16 +321,16 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-11
-          - os: macos-12
+          - os: ubuntu-24.04
           - os: macos-13
+          - os: macos-14
+          - os: macos-15
 
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install packages
         if: matrix.install
@@ -321,16 +369,16 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-11
-          - os: macos-12
+          - os: ubuntu-24.04
           - os: macos-13
+          - os: macos-14
+          - os: macos-15
 
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install packages
         if: matrix.install
@@ -379,16 +427,16 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-11
-          - os: macos-12
+          - os: ubuntu-24.04
           - os: macos-13
+          - os: macos-14
+          - os: macos-15
 
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install packages
         if: matrix.install
@@ -441,7 +489,7 @@ jobs:
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Boost
         shell: cmd
@@ -490,7 +538,7 @@ jobs:
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Boost
         shell: cmd
@@ -557,7 +605,7 @@ jobs:
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Boost
         shell: cmd

build.jam

@@ -0,0 +1,20 @@
+# Copyright 2023-2024 René Ferdinand Rivera Morell
+# Copyright 2024 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# https://www.boost.org/LICENSE_1_0.txt
+
+require-b2 5.2 ;
+
+constant boost_dependencies :
+    /boost/mp11//boost_mp11
+    ;
+
+project /boost/describe ;
+
+explicit
+    [ alias boost_describe : : : : <include>include <library>$(boost_dependencies) ]
+    [ alias all : boost_describe test ]
+    ;
+
+call-if : boost-library describe
+    ;

doc/describe/examples.adoc

@@ -263,6 +263,11 @@ The presence of private members is taken as an indication that
 a universal conversion is not suitable, so the overload is
 disabled in this case using `std::enable_if_t`.
 
+NOTE: Since release 1.81.0, Boost.JSON provides its
+own, built-in, support for described classes. Consequently,
+when using Boost 1.81.0 or later, you don't need the below
+`tag_invoke` function.
+
 [source]
 ----
 include::../../example/to_json.cpp[lines=5..-1]
@@ -282,6 +287,11 @@ Like the previous example, but in the other direction. Defines
 a `tag_invoke` overload that converts a `boost::json::value` to
 an annotated struct.
 
+NOTE: Since release 1.81.0, Boost.JSON provides its
+own, built-in, support for described classes. Consequently,
+when using Boost 1.81.0 or later, you don't need the below
+`tag_invoke` function.
+
 [source]
 ----
 include::../../example/from_json.cpp[lines=5..-1]

example/fmtlib_class_formatter.cpp

@@ -18,7 +18,7 @@ template<class T> struct fmt::formatter<T, char, std::enable_if_t<
 
         if( it != end && *it != '}' )
         {
-            ctx.error_handler().on_error( "invalid format" );
+            throw_format_error( "invalid format" );
         }
 
         return it;

example/fmtlib_enum_formatter.cpp

@@ -25,7 +25,7 @@ public:
 
         if( i1 != i2 )
         {
-            ctx.error_handler().on_error( "invalid format" );
+            throw_format_error( "invalid format" );
         }
 
         return i1;

example/from_json.cpp

@@ -5,11 +5,14 @@
 #include <boost/describe.hpp>
 #include <boost/mp11.hpp>
 #include <boost/json.hpp>
+#include <boost/version.hpp>
 #include <type_traits>
 
 namespace app
 {
 
+#if BOOST_VERSION < 108100
+
 template<class T> void extract( boost::json::object const & obj, char const * name, T & value )
 {
     value = boost::json::value_to<T>( obj.at( name ) );
@@ -36,6 +39,8 @@ template<class T,
     return t;
 }
 
+#endif
+
 struct A
 {
     int x;

example/json_rpc.cpp

@@ -34,7 +34,7 @@ template<class C1, class C2, class R, class... A>
 
 template<class C>
   boost::json::value
-    call( C & c, boost::string_view method, boost::json::value const & args )
+    call( C & c, boost::string_view method, boost::json::array const & args )
 {
     using Fd = boost::describe::describe_members<C,
         boost::describe::mod_public | boost::describe::mod_function>;
@@ -46,7 +46,7 @@ template<class C>
 
         if( !found && method == D.name)
         {
-            result = call_impl( c, D.pointer, args.as_array() );
+            result = call_impl( c, D.pointer, args );
             found = true;
         }
 
@@ -80,6 +80,6 @@ BOOST_DESCRIBE_STRUCT(Object, (), (greet, add))
 int main()
 {
     Object obj;
-    std::cout << call( obj, "greet", {{ "world" }} ) << std::endl;
-    std::cout << call( obj, "add", {{ 1, 2 }} ) << std::endl;
+    std::cout << call( obj, "greet", { "world" } ) << std::endl;
+    std::cout << call( obj, "add", { 1, 2 } ) << std::endl;
 }

example/to_json.cpp

@@ -5,6 +5,7 @@
 #include <boost/describe.hpp>
 #include <boost/mp11.hpp>
 #include <boost/json.hpp>
+#include <boost/version.hpp>
 #include <type_traits>
 #include <vector>
 #include <map>
@@ -12,6 +13,8 @@
 namespace app
 {
 
+#if BOOST_VERSION < 108100
+
 template<class T,
     class D1 = boost::describe::describe_members<T,
         boost::describe::mod_public | boost::describe::mod_protected>,
@@ -29,6 +32,8 @@ template<class T,
     });
 }
 
+#endif
+
 struct A
 {
     int x;

include/boost/describe/detail/bases.hpp

@@ -30,24 +30,18 @@ template<class C, class B> struct base_descriptor
 template<class C, class B> constexpr unsigned base_descriptor<C, B>::modifiers;
 #endif
 
-template<class... T> auto base_descriptor_fn_impl( int, T... )
+// bases_descriptor
+template<typename ...>
+struct bases_descriptor_impl;
+
+template<class C, class ...Bs>
+struct bases_descriptor_impl<C, list<Bs...>>
 {
-    return list<T...>();
-}
-
-#define BOOST_DESCRIBE_BASE_IMPL(C, B) , boost::describe::detail::base_descriptor<C, B>()
-
-#if defined(_MSC_VER) && !defined(__clang__)
+    using type = list<base_descriptor<C, Bs>...>;
+};
 
 #define BOOST_DESCRIBE_BASES(C, ...) inline auto boost_base_descriptor_fn( C** ) \
-{ return boost::describe::detail::base_descriptor_fn_impl( 0 BOOST_DESCRIBE_PP_FOR_EACH(BOOST_DESCRIBE_BASE_IMPL, C, __VA_ARGS__) ); }
-
-#else
-
-#define BOOST_DESCRIBE_BASES(C, ...) inline auto boost_base_descriptor_fn( C** ) \
-{ return boost::describe::detail::base_descriptor_fn_impl( 0 BOOST_DESCRIBE_PP_FOR_EACH(BOOST_DESCRIBE_BASE_IMPL, C, ##__VA_ARGS__) ); }
-
-#endif
+{ return typename boost::describe::detail::bases_descriptor_impl<C, boost::describe::detail::list<__VA_ARGS__>>::type(); }
 
 } // namespace detail
 } // namespace describe

test/Jamfile

@@ -4,11 +4,16 @@
 
 import testing ;
 
+local WERROR = <toolset>msvc:<warnings-as-errors>on <toolset>clang:<warnings-as-errors>on <toolset>gcc:<warnings-as-errors>on ;
+
 project : requirements
+  <library>/boost/describe//boost_describe
+  <library>/boost/container_hash//boost_container_hash
+  <library>/boost/core//boost_core
+  <library>/boost/variant2//boost_variant2
+
   <warnings>extra
-  <toolset>msvc:<warnings-as-errors>on
-  <toolset>clang:<warnings-as-errors>on
-  <toolset>gcc:<warnings-as-errors>on
+  $(WERROR)
   <toolset>clang:<cxxflags>"-Wno-unused-private-field" ;
 
 run quick.cpp ;
@@ -87,8 +92,8 @@ explicit describe_cxx14 ;
 
 local CXX14 = [ check-target-builds describe_cxx14 describe_cxx14 : : <build>no ] "<toolset>msvc-14.0:<cxxflags>-wd4100" ;
 
-local JSON = <library>/boost//json/<warnings>off "<toolset>msvc-14.2:<cxxflags>-wd5104" ;
-local SERIALIZATION = <library>/boost//serialization/<warnings>off "-<toolset>gcc:<warnings-as-errors>on" "-<toolset>clang:<warnings-as-errors>on" ;
+local JSON = <library>/boost/json//boost_json/<warnings>off "<toolset>msvc-14.2:<cxxflags>-wd5104" <undefined-sanitizer>norecover:<link>static ;
+local SERIALIZATION = <library>/boost/serialization//boost_serialization/<warnings>off -$(WERROR) <undefined-sanitizer>norecover:<link>static ;
 
 run ../example/printing_enums_ct.cpp : : : $(CXX14) ;
 run ../example/printing_enums_rt.cpp : : : $(CXX14) ;
@@ -98,9 +103,10 @@ run ../example/print_function.cpp : : : $(CXX14) ;
 run ../example/to_json.cpp : : : $(CXX14) $(JSON) ;
 run ../example/from_json.cpp : : : $(CXX14) $(JSON) ;
 run ../example/serialization.cpp : : : $(CXX14) $(SERIALIZATION) ;
-run ../example/json_rpc.cpp : : : $(CXX14) $(JSON) ;
+run ../example/json_rpc.cpp : : : $(CXX14) $(JSON) <library>/boost/utility//boost_utility
+  "<toolset>gcc-14,<cxxstd>14:<build>no" ; # mysterious segmentation fault
 run ../example/hash_value.cpp : : : $(CXX14) ;
 run ../example/equality.cpp : : : $(CXX14) ;
-link ../example/console.cpp : $(CXX14) $(JSON) ;
+link ../example/console.cpp : $(CXX14) $(JSON) <library>/boost/utility//boost_utility ;
 run ../example/struct_to_tuple.cpp : : : $(CXX14) ;
 run ../example/pm_to_string.cpp : : : $(CXX14) ;

test/bases_test.cpp

@@ -62,6 +62,14 @@ int main() {}
 
 #include <boost/mp11.hpp>
 
+template<typename ...Bases>
+struct ZT: Bases...
+{
+    BOOST_DESCRIBE_CLASS(ZT, (Bases...), (), (), ());
+};
+
+using Z = ZT<X1, X2, X3>;
+
 int main()
 {
     using namespace boost::describe;
@@ -151,6 +159,21 @@ int main()
         BOOST_TEST_EQ( (mp_at_c<L, 1>::modifiers), mod_private | mod_virtual );
     }
 
+    {
+        using L = describe_bases<Z, mod_any_access>;
+
+        BOOST_TEST_EQ( mp_size<L>::value, 3 );
+
+        BOOST_TEST_TRAIT_SAME( typename mp_at_c<L, 0>::type, X1 );
+        BOOST_TEST_EQ( (mp_at_c<L, 0>::modifiers), mod_public );
+
+        BOOST_TEST_TRAIT_SAME( typename mp_at_c<L, 1>::type, X2 );
+        BOOST_TEST_EQ( (mp_at_c<L, 1>::modifiers), mod_public );
+
+        BOOST_TEST_TRAIT_SAME( typename mp_at_c<L, 2>::type, X3 );
+        BOOST_TEST_EQ( (mp_at_c<L, 2>::modifiers), mod_public );
+    }
+
     return boost::report_errors();
 }
 

test/cmake_install_test/CMakeLists.txt

@@ -14,4 +14,4 @@ target_link_libraries(main Boost::describe)
 enable_testing()
 add_test(main main)
 
-add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)
+add_custom_target(check VERBATIM COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)

test/cmake_subdir_test/CMakeLists.txt

@@ -20,4 +20,4 @@ target_link_libraries(quick Boost::describe Boost::core)
 enable_testing()
 add_test(quick quick)
 
-add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure --no-tests=error -C $<CONFIG>)
+add_custom_target(check VERBATIM COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure --no-tests=error -C $<CONFIG>)