Work around warnings in char.cpp and integral_c.cpp when char is unsigned. Fixes #50.

* Make the library modular usable.

* Switch to library requirements instead of source. As source puts extra source in install targets.

* Add requires-b2 check to top-level build file.

* Bump B2 require to 5.2

* Change all <source> references to <library>.

* Update copyright dates.

* Move inter-lib dependencies to a project variable and into the build targets.

* Update build deps.

.github/workflows/ci.yml

@@ -56,7 +56,7 @@ jobs:
             install: g++-12
           - toolset: gcc-13
             cxxstd: "03,11,14,17,20,2b"
-            container: ubuntu:23.04
+            container: ubuntu:24.04
             os: ubuntu-latest
             install: g++-13
           - toolset: gcc-14
@@ -64,6 +64,11 @@ jobs:
             container: ubuntu:24.04
             os: ubuntu-latest
             install: g++-14
+          - toolset: gcc
+            cxxflags: -funsigned-char
+            cxxstd: "03,11,14,17,20,2b"
+            container: ubuntu:24.04
+            os: ubuntu-latest
           - toolset: clang
             compiler: clang++-3.9
             cxxstd: "03,11,14"
@@ -138,13 +143,13 @@ jobs:
           - toolset: clang
             compiler: clang++-16
             cxxstd: "03,11,14,17,20,2b"
-            container: ubuntu:23.04
+            container: ubuntu:24.04
             os: ubuntu-latest
             install: clang-16
           - toolset: clang
             compiler: clang++-17
             cxxstd: "03,11,14,17,20,2b"
-            container: ubuntu:23.10
+            container: ubuntu:24.04
             os: ubuntu-latest
             install: clang-17
           - toolset: clang
@@ -153,31 +158,43 @@ jobs:
             container: ubuntu:24.04
             os: ubuntu-latest
             install: clang-18
-          - toolset: clang
-            cxxstd: "03,11,14,17,20,2b"
-            os: macos-12
           - 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
@@ -215,7 +232,7 @@ jobs:
       - name: Run tests
         run: |
           cd ../boost-root
-          ./b2 -j3 libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} variant=debug,release
+          ./b2 -j3 libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} cxxflags=${{matrix.cxxflags}} variant=debug,release
 
   windows:
     strategy:
@@ -283,9 +300,10 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-12
+          - os: ubuntu-24.04
           - os: macos-13
           - os: macos-14
+          - os: macos-15
 
     runs-on: ${{matrix.os}}
 
@@ -331,9 +349,10 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-12
+          - os: ubuntu-24.04
           - os: macos-13
           - os: macos-14
+          - os: macos-15
 
     runs-on: ${{matrix.os}}
 
@@ -389,9 +408,10 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-12
+          - os: ubuntu-24.04
           - os: macos-13
           - os: macos-14
+          - os: macos-15
 
     runs-on: ${{matrix.os}}
 

Jamfile

@@ -1,11 +0,0 @@
-#  Boost.MPL 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 ;

build.jam

@@ -0,0 +1,29 @@
+# Copyright René Ferdinand Rivera Morell 2023-2024
+# 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)
+
+require-b2 5.2 ;
+
+constant boost_dependencies :
+    /boost/config//boost_config
+    /boost/core//boost_core
+    /boost/predef//boost_predef
+    /boost/preprocessor//boost_preprocessor
+    /boost/static_assert//boost_static_assert
+    /boost/type_traits//boost_type_traits
+    /boost/utility//boost_utility ;
+
+project /boost/mpl
+    : common-requirements
+        <include>include
+    ;
+
+explicit
+    [ alias boost_mpl : : : : <library>$(boost_dependencies) ]
+    [ alias all : boost_mpl example test ]
+    ;
+
+call-if : boost-library mpl
+    ;
+

example/Jamfile.v2

@@ -7,9 +7,11 @@
 
 import testing ;
 
+project : requirements <library>/boost/mpl//boost_mpl ;
+
 test-suite "mpl-examples"
    :    [ run     inherit_linearly.cpp ]
         [ compile integer.cpp ]
-        [ run     tuple_from_list.cpp ]
+        [ run     tuple_from_list.cpp : : : <library>/boost/tuple//boost_tuple ]
    ;
 

include/boost/mpl/aux_/integral_wrapper.hpp

@@ -56,7 +56,8 @@ struct AUX_WRAPPER_NAME
 // have to #ifdef here: some compilers don't like the 'N + 1' form (MSVC),
 // while some other don't like 'value + 1' (Borland), and some don't like
 // either
-#if BOOST_WORKAROUND(__EDG_VERSION__, <= 243)
+#if BOOST_WORKAROUND(__EDG_VERSION__, <= 243) \
+    || __cplusplus >= 201103L
  private:
     BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, next_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N + 1)));
     BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, prior_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N - 1)));

test/Jamfile.v2

@@ -1,5 +1,6 @@
 project
     :   requirements
+        <library>/boost/mpl//boost_mpl
         <warnings>extra
         <toolset>clang:<cxxflags>-Wno-variadic-macros
         <toolset>gcc:<cxxflags>-Wshadow
@@ -49,7 +50,8 @@ compile find.cpp ;
 compile find_if.cpp ;
 compile fold.cpp ;
 run for_each.cpp
-  : : : <cxxstd>98:<build>no <cxxstd>03:<build>no ;
+  : : : <cxxstd>98:<build>no <cxxstd>03:<build>no
+    <library>/boost/bind//boost_bind ;
 compile front.cpp ;
 compile get_tag_def.cpp ;
 compile has_xxx.cpp ;
@@ -110,3 +112,5 @@ compile vector.cpp ;
 compile vector_c.cpp ;
 compile zip_view.cpp ;
 run string.cpp ;
+
+run issue_69.cpp ;

test/char.cpp

@@ -13,12 +13,17 @@
 
 #include <boost/mpl/char.hpp>
 #include <boost/preprocessor/repeat.hpp>
+#include <climits>
 
 #include "integral_wrapper_test.hpp"
 
 
 MPL_TEST_CASE()
 {
+#if CHAR_MAX > 0
+#   define WRAPPER(T, i) char_<static_cast<char>(i)>
+#else
 #   define WRAPPER(T, i) char_<i>
+#endif
     BOOST_PP_REPEAT(10, INTEGRAL_WRAPPER_TEST, char)
 }

test/integral_c.cpp

@@ -13,6 +13,7 @@
 
 #include <boost/mpl/integral_c.hpp>
 #include <boost/preprocessor/repeat.hpp>
+#include <climits>
 
 #include "integral_wrapper_test.hpp"
 
@@ -21,10 +22,14 @@ MPL_TEST_CASE()
 {
 #   define WRAPPER(T, i) integral_c<T,i>
 
-#if !(defined(__APPLE_CC__) && defined(__GNUC__) && (__GNUC__ == 3) && (__GNUC_MINOR__ <= 3))
-    BOOST_PP_REPEAT(10, INTEGRAL_WRAPPER_TEST, char)
-#endif
     BOOST_PP_REPEAT(10, INTEGRAL_WRAPPER_TEST, short)
     BOOST_PP_REPEAT(10, INTEGRAL_WRAPPER_TEST, int)
     BOOST_PP_REPEAT(10, INTEGRAL_WRAPPER_TEST, long)
+
+#if CHAR_MAX > 0
+#   undef WRAPPER
+#   define WRAPPER(T, i) integral_c<T,static_cast<T>(i)>
+#endif
+
+    BOOST_PP_REPEAT(10, INTEGRAL_WRAPPER_TEST, char)
 }

test/issue_69.cpp

@@ -0,0 +1,13 @@
+// Copyright 2024 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0. 
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/mpl/integral_c.hpp>
+
+enum test { zero, one };
+
+int main()
+{
+    boost::mpl::integral_c<test, zero> m;
+    return m.value;
+}