Update .travis.yml

Fix broken sgi/stl links.

.travis.yml

@@ -0,0 +1,163 @@
+# Copyright 2016 Edward Diener
+# Copyright 2016, 2017, 2021 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)
+
+language: cpp
+
+dist: xenial
+
+branches:
+  only:
+    - master
+    - develop
+    - /feature\/.*/
+
+env:
+  matrix:
+    - BOGUS_JOB=true
+
+matrix:
+
+  exclude:
+    - env: BOGUS_JOB=true
+
+  include:
+    - os: linux
+      compiler: g++-4.4
+      env: TOOLSET=gcc CXXSTD=98
+      addons:
+        apt:
+          packages:
+            - g++-4.4
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-4.6
+      env: TOOLSET=gcc CXXSTD=03,0x
+      addons:
+        apt:
+          packages:
+            - g++-4.6
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-4.8
+      env: TOOLSET=gcc CXXSTD=03,11
+      addons:
+        apt:
+          packages:
+            - g++-4.8
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-5
+      env: TOOLSET=gcc CXXSTD=03,11,14
+      addons:
+        apt:
+          packages:
+            - g++-5
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-7
+      env: TOOLSET=gcc CXXSTD=03,11,14,17
+      addons:
+        apt:
+          packages:
+            - g++-7
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-9
+      env: TOOLSET=gcc CXXSTD=03,11,14,17
+      addons:
+        apt:
+          packages:
+            - g++-9
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: bionic
+      compiler: g++-10
+      env: TOOLSET=gcc CXXSTD=03,11,14,17,2a
+      addons:
+        apt:
+          packages:
+            - g++-10
+          sources:
+            - sourceline: "ppa:ubuntu-toolchain-r/test"
+
+    - os: linux
+      dist: bionic
+      compiler: g++-11
+      env: UBSAN=1 TOOLSET=gcc CXXSTD=03,11,14,17,20 UBSAN_OPTIONS=print_stacktrace=1 LINKFLAGS=-fuse-ld=gold
+      addons:
+        apt:
+          packages:
+            - g++-11
+          sources:
+            - sourceline: "ppa:ubuntu-toolchain-r/test"
+
+    - os: linux
+      compiler: clang++-11
+      env: TOOLSET=clang CXXSTD=03,11,14,17,20
+      addons:
+        apt:
+          packages:
+            - clang-11
+          sources:
+            - ubuntu-toolchain-r-test
+            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-11 main'
+              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
+
+    - os: linux
+      compiler: clang++-12
+      env: UBSAN=1 TOOLSET=clang CXXSTD=03,11,14,17,20 UBSAN_OPTIONS=print_stacktrace=1
+      addons:
+        apt:
+          packages:
+            - clang-12
+          sources:
+            - ubuntu-toolchain-r-test
+            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-12 main'
+              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
+
+    - os: linux
+      dist: bionic
+      compiler: clang++-libc++
+      env: UBSAN=1 TOOLSET=clang CXXSTD=03,11,14,17,2a UBSAN_OPTIONS=print_stacktrace=1
+      addons:
+        apt:
+          packages:
+            - libc++-dev
+
+    - os: osx
+      compiler: clang++
+      env: UBSAN=1 TOOLSET=clang CXXSTD=03,11,14,1z UBSAN_OPTIONS=print_stacktrace=1
+
+install:
+  - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
+  - cd ..
+  - git clone -b $BOOST_BRANCH https://github.com/boostorg/boost.git boost-root
+  - cd boost-root
+  - git submodule update --init tools/boostdep
+  - cp -r $TRAVIS_BUILD_DIR/* libs/lambda
+  - python tools/boostdep/depinst/depinst.py lambda
+  - ./bootstrap.sh
+  - ./b2 headers
+
+script:
+  - |-
+    echo "using $TOOLSET : : $TRAVIS_COMPILER ;" > ~/user-config.jam
+  - ./b2 -j3 libs/lambda/test toolset=$TOOLSET cxxstd=$CXXSTD variant=debug,release ${UBSAN:+cxxflags=-fsanitize=undefined cxxflags=-fno-sanitize-recover=undefined linkflags=-fsanitize=undefined define=UBSAN=1 debug-symbols=on} ${LINKFLAGS:+linkflags=$LINKFLAGS}
+
+notifications:
+  email:
+    on_success: always

CMakeLists.txt

@@ -0,0 +1,34 @@
+# Generated by `boostdep --cmake lambda`
+# Copyright 2020 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# https://www.boost.org/LICENSE_1_0.txt
+
+cmake_minimum_required(VERSION 3.5...3.16)
+
+project(boost_lambda VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)
+
+add_library(boost_lambda INTERFACE)
+add_library(Boost::lambda ALIAS boost_lambda)
+
+target_include_directories(boost_lambda INTERFACE include)
+
+target_link_libraries(boost_lambda
+  INTERFACE
+    Boost::bind
+    Boost::config
+    Boost::core
+    Boost::detail
+    Boost::iterator
+    Boost::mpl
+    Boost::preprocessor
+    Boost::tuple
+    Boost::type_traits
+    Boost::utility
+)
+
+if(BUILD_TESTING AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/test/CMakeLists.txt")
+
+  add_subdirectory(test)
+
+endif()
+

appveyor.yml

@@ -0,0 +1,38 @@
+# Copyright 2017 Edward Diener
+# 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)
+
+version: 1.0.{build}-{branch}
+
+shallow_clone: true
+
+branches:
+  only:
+    - master
+    - develop
+
+environment:
+  matrix:
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-9.0,msvc-10.0,msvc-11.0,msvc-12.0,msvc-14.0
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: msvc-14.1
+
+install:
+  - cd ..
+  - git clone -b %APPVEYOR_REPO_BRANCH% https://github.com/boostorg/boost.git boost-root
+  - cd boost-root
+  - git submodule update --init tools/build
+  - git submodule update --init libs/config
+  - git submodule update --init tools/boostdep
+  - git submodule update --init tools/boost_install
+  - git submodule update --init libs/headers
+  - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\lambda
+  - python tools/boostdep/depinst/depinst.py lambda
+  - bootstrap
+  - b2 headers
+
+build: off
+
+test_script:
+  - b2 libs/lambda/test toolset=%TOOLSET%

doc/Jamfile.v2

@@ -1,4 +1,4 @@
-project boost/doc ;
+project lambda/doc ;
 import boostbook : boostbook ;
 
 # Are these really the correct images??
@@ -10,3 +10,12 @@ boostbook lambda-doc : lambda.xml
    <format>pdf:<xsl:param>img.src.path=$(images)/
 ;
 
+###############################################################################
+alias boostdoc
+    : lambda.xml
+    :
+    :
+    : ;
+explicit boostdoc ;
+alias boostrelease ;
+explicit boostrelease ;

doc/detail/lambda_doc.xml

@@ -3281,7 +3281,7 @@ was dropped.
 <abbrev>SGI02</abbrev>
 <title>The SGI Standard Template Library</title>
 <pubdate>2002</pubdate>
-<bibliomisc><ulink url="http://www.sgi.com/tech/stl/">www.sgi.com/tech/stl/</ulink></bibliomisc>
+<bibliomisc><ulink url="https://www.boost.org/sgi/stl/">www.boost.org/sgi/stl/</ulink></bibliomisc>
 
 </biblioentry>
     
@@ -3435,7 +3435,7 @@ was dropped.
 <firstname>Brian</firstname>
 <surname>McNamara</surname>
 </author>
-<bibliomisc><ulink url="http://www.cc.gatech.edu/~yannis/fc++/">www.cc.gatech.edu/~yannis/fc++/</ulink>
+<bibliomisc><ulink url="http://yanniss.github.io/fc++/">yanniss.github.io/fc++/ </ulink>
 </bibliomisc>
 <pubdate>2002</pubdate>
 </biblioentry>

doc/lambda.xml

@@ -3286,7 +3286,7 @@ was dropped.
 <abbrev>SGI02</abbrev>
 <title>The SGI Standard Template Library</title>
 <pubdate>2002</pubdate>
-<bibliomisc><ulink url="http://www.sgi.com/tech/stl/">www.sgi.com/tech/stl/</ulink></bibliomisc>
+<bibliomisc><ulink url="https://www.boost.org/sgi/stl/">www.boost.org/sgi/stl/</ulink></bibliomisc>
 
 </biblioentry>
     
@@ -3440,7 +3440,7 @@ was dropped.
 <firstname>Brian</firstname>
 <surname>McNamara</surname>
 </author>
-<bibliomisc><ulink url="http://www.cc.gatech.edu/~yannis/fc++/">www.cc.gatech.edu/~yannis/fc++/</ulink>
+<bibliomisc><ulink url="http://yanniss.github.io/fc++/">yanniss.github.io/fc++/ </ulink>
 </bibliomisc>
 <pubdate>2002</pubdate>
 </biblioentry>

include/boost/lambda/algorithm.hpp

@@ -684,6 +684,8 @@ struct rotate_copy {
 
 // random_shuffle  ---------------------------------
 
+#ifndef BOOST_NO_CXX98_RANDOM_SHUFFLE
+
 struct random_shuffle {
 
   template <class Args>
@@ -703,6 +705,7 @@ struct random_shuffle {
 
 };
 
+#endif
 
 // partition  ---------------------------------
 

include/boost/lambda/closures.hpp

@@ -11,8 +11,8 @@
     URL: http://spirit.sourceforge.net/
 
 ==============================================================================*/
-#ifndef PHOENIX_CLOSURES_HPP
-#define PHOENIX_CLOSURES_HPP
+#ifndef BOOST_LAMBDA_CLOSURES_HPP
+#define BOOST_LAMBDA_CLOSURES_HPP
 
 ///////////////////////////////////////////////////////////////////////////////
 #include "boost/lambda/core.hpp"

include/boost/lambda/core.hpp

@@ -22,6 +22,8 @@
 #ifndef BOOST_LAMBDA_CORE_HPP
 #define BOOST_LAMBDA_CORE_HPP
 
+#include "boost/config.hpp"
+
 #include "boost/type_traits/transform_traits.hpp"
 #include "boost/type_traits/cv_traits.hpp"
 
@@ -66,9 +68,9 @@ namespace {
   boost::lambda::placeholder2_type free2 = boost::lambda::placeholder2_type();
   boost::lambda::placeholder3_type free3 = boost::lambda::placeholder3_type();
 
-  boost::lambda::placeholder1_type& _1 = free1;
-  boost::lambda::placeholder2_type& _2 = free2;
-  boost::lambda::placeholder3_type& _3 = free3;
+  boost::lambda::placeholder1_type& BOOST_ATTRIBUTE_UNUSED _1 = free1;
+  boost::lambda::placeholder2_type& BOOST_ATTRIBUTE_UNUSED _2 = free2;
+  boost::lambda::placeholder3_type& BOOST_ATTRIBUTE_UNUSED _3 = free3;
   // _1, _2, ... naming scheme by Peter Dimov
 } // unnamed
    

include/boost/lambda/detail/lambda_config.hpp

@@ -22,13 +22,6 @@
 #     define BOOST_REF_TO_FUNC_CONFLICTS_WITH_REF_TO_T
 #     define BOOST_LAMBDA_INCORRECT_BIND_OVERLOADING
 #   endif
-#   if (__GNUC__ == 2 && __GNUC_MINOR__ <= 97) 
-#     define BOOST_NO_TEMPLATED_STREAMS
-#     define BOOST_LAMBDA_INCORRECT_BIND_OVERLOADING
-#   endif
-#   if (__GNUC__ == 2 && __GNUC_MINOR__ <= 95) 
-#     define BOOST_LAMBDA_FAILS_IN_TEMPLATE_KEYWORD_AFTER_SCOPE_OPER
-#   endif
 # endif  // __GNUC__
  
 

include/boost/lambda/detail/lambda_functors.hpp

@@ -15,6 +15,7 @@
 
 #include <boost/config.hpp>
 #include <boost/detail/workaround.hpp>
+#include <boost/utility/result_of.hpp>
 
 #if BOOST_WORKAROUND(BOOST_MSVC, == 1310)
 
@@ -297,6 +298,38 @@ public:
 } // namespace lambda
 } // namespace boost
 
+namespace boost {
+
+#if !defined(BOOST_RESULT_OF_USE_DECLTYPE) || defined(BOOST_NO_CXX11_DECLTYPE)
+
+template<class T>
+struct result_of<boost::lambda::lambda_functor<T>()>
+{
+    typedef typename boost::lambda::lambda_functor<T>::nullary_return_type type;
+};
+
+template<class T>
+struct result_of<const boost::lambda::lambda_functor<T>()>
+{
+    typedef typename boost::lambda::lambda_functor<T>::nullary_return_type type;
+};
+
+#endif
+
+template<class T>
+struct tr1_result_of<boost::lambda::lambda_functor<T>()>
+{
+    typedef typename boost::lambda::lambda_functor<T>::nullary_return_type type;
+};
+
+template<class T>
+struct tr1_result_of<const boost::lambda::lambda_functor<T>()>
+{
+    typedef typename boost::lambda::lambda_functor<T>::nullary_return_type type;
+};
+
+}
+
 // is_placeholder
 
 #include <boost/is_placeholder.hpp>

include/boost/lambda/detail/lambda_traits.hpp

@@ -282,6 +282,11 @@ struct const_copy_argument<void> {
   typedef void type;
 };
 
+template<>
+struct const_copy_argument<void const> {
+  typedef void type;
+};
+
 
 // Does the same as const_copy_argument, but passes references through as such
 template<class T>

include/boost/lambda/detail/operator_return_type_traits.hpp

@@ -12,7 +12,13 @@
 #define BOOST_LAMBDA_OPERATOR_RETURN_TYPE_TRAITS_HPP
 
 #include "boost/lambda/detail/is_instance_of.hpp"
-#include "boost/type_traits/same_traits.hpp"
+#include "boost/type_traits/is_same.hpp"
+#include "boost/type_traits/is_pointer.hpp"
+#include "boost/type_traits/is_float.hpp"
+#include "boost/type_traits/is_convertible.hpp"
+#include "boost/type_traits/remove_pointer.hpp"
+#include "boost/type_traits/remove_const.hpp"
+#include "boost/type_traits/remove_reference.hpp"
 
 #include "boost/indirect_reference.hpp"
 #include "boost/detail/container_fwd.hpp"
@@ -536,36 +542,6 @@ struct return_type_2<bitwise_action<Act>, A, B>
 
 namespace detail {
 
-#ifdef BOOST_NO_TEMPLATED_STREAMS
-
-template<class A, class B>
-struct leftshift_type {
-
-  typedef typename detail::IF<
-    boost::is_convertible<
-      typename boost::remove_reference<A>::type*,
-      std::ostream*
-    >::value,
-    std::ostream&, 
-    typename detail::remove_reference_and_cv<A>::type
-  >::RET type;
-};
-
-template<class A, class B>
-struct rightshift_type {
-
-  typedef typename detail::IF<
-
-    boost::is_convertible<
-      typename boost::remove_reference<A>::type*,
-      std::istream*
-    >::value, 
-    std::istream&,
-    typename detail::remove_reference_and_cv<A>::type
-  >::RET type;
-};
-
-#else
 
 template <class T> struct get_ostream_type {
   typedef std::basic_ostream<typename T::char_type, 
@@ -602,7 +578,6 @@ public:
 };
 
 
-#endif
 
 } // end detail
 

include/boost/lambda/detail/operators.hpp

@@ -161,23 +161,6 @@ namespace detail {
 
 // Note that the overloading is const vs. non-const first argument
 
-#ifdef BOOST_NO_TEMPLATED_STREAMS
-template<class T> struct convert_ostream_to_ref_others_to_c_plain_by_default {
-  typedef typename detail::IF<
-                       boost::is_convertible<T*, std::ostream*>::value,
-                       T&,
-                       typename const_copy_argument <T>::type
-                     >::RET type;
-};
-
-template<class T> struct convert_istream_to_ref_others_to_c_plain_by_default {
-  typedef typename detail::IF<
-                       boost::is_convertible<T*, std::istream*>::value,
-                       T&,
-                       typename const_copy_argument <T>::type
-                     >::RET type;
-};
-#else
 
 template<class T> struct convert_ostream_to_ref_others_to_c_plain_by_default {
   typedef typename detail::IF<
@@ -198,7 +181,6 @@ template<class T> struct convert_istream_to_ref_others_to_c_plain_by_default {
                        typename const_copy_argument <T>::type
                      >::RET type;
 };
-#endif
 
 } // detail
 

include/boost/lambda/detail/ret.hpp

@@ -284,7 +284,7 @@ inline const
 lambda_functor<
   lambda_functor_base<do_nothing_action, null_type> 
 > 
-make_void(const Arg1& a1) { 
+make_void(const Arg1&) { 
 return 
     lambda_functor_base<do_nothing_action, null_type>();
 }

include/boost/lambda/detail/return_type_traits.hpp

@@ -19,10 +19,6 @@
 namespace boost { 
 namespace lambda {
 
-using ::boost::type_traits::ice_and;
-using ::boost::type_traits::ice_or;
-using ::boost::type_traits::ice_not;
-
 // Much of the type deduction code for standard arithmetic types 
 // from Gary Powell
 
@@ -77,8 +73,7 @@ template <class Act, class A> struct return_type_1_prot {
 public:
   typedef typename 
     detail::IF<
-  //      is_protectable<Act>::value && is_lambda_functor<A>::value,
-      ice_and<is_protectable<Act>::value, is_lambda_functor<A>::value>::value,
+      is_protectable<Act>::value && is_lambda_functor<A>::value,
       lambda_functor<
         lambda_functor_base< 
           Act, 
@@ -112,9 +107,7 @@ namespace detail {
   // add const to rvalues, so that all rvalues are stored as const in 
   // the args tuple
     typedef typename detail::IF_type<
-//      boost::is_reference<T>::value && !boost::is_const<non_ref_T>::value,
-      ice_and<boost::is_reference<T>::value,
-              ice_not<boost::is_const<non_ref_T>::value>::value>::value,
+      boost::is_reference<T>::value && !boost::is_const<non_ref_T>::value,
       detail::identity_mapping<T>,
       const_copy_argument<non_ref_T> // handles funtion and array 
     >::type type;                      // types correctly
@@ -148,11 +141,8 @@ template <class Act, class A, class B> struct return_type_2_prot {
 
 typedef typename 
   detail::IF<
-//    is_protectable<Act>::value &&
-//      (is_lambda_functor<A>::value || is_lambda_functor<B>::value),
-    ice_and<is_protectable<Act>::value,
-            ice_or<is_lambda_functor<A>::value, 
-                   is_lambda_functor<B>::value>::value>::value,
+    is_protectable<Act>::value &&
+      (is_lambda_functor<A>::value || is_lambda_functor<B>::value),
     lambda_functor<
       lambda_functor_base< 
         Act, 
@@ -187,11 +177,8 @@ struct return_type_2_comma
 
 typedef typename 
   detail::IF<
-//  is_protectable<other_action<comma_action> >::value && // it is protectable
-//  (is_lambda_functor<A>::value || is_lambda_functor<B>::value),
-    ice_and<is_protectable<other_action<comma_action> >::value, // it is protectable
-            ice_or<is_lambda_functor<A>::value, 
-                   is_lambda_functor<B>::value>::value>::value,
+    is_protectable<other_action<comma_action> >::value && // it is protectable
+    (is_lambda_functor<A>::value || is_lambda_functor<B>::value),
     lambda_functor<
       lambda_functor_base< 
         other_action<comma_action>, 

include/boost/lambda/detail/suppress_unused.hpp

@@ -10,8 +10,8 @@
 
 // ------------------------------------------------------------
 
-#ifndef BOOST_LAMBDA_SUPRESS_UNUSED_HPP
-#define BOOST_LAMBDA_SUPRESS_UNUSED_HPP
+#ifndef BOOST_LAMBDA_SUPPRESS_UNUSED_HPP
+#define BOOST_LAMBDA_SUPPRESS_UNUSED_HPP
 
 namespace boost { 
 namespace lambda {

include/boost/lambda/if.hpp

@@ -345,7 +345,7 @@ public:
 //      is true, the true_statement (again an lambda_functor) is executed
 //      otherwise, the false_statement (another lambda_functor) is executed. The
 //      result type of this is void. Note the trailing underscore after
-//      if_ and the the leading dot and the trailing underscore before
+//      if_ and the leading dot and the trailing underscore before
 //      and after .else_.
 //
 ///////////////////////////////////////////////////////////////////////////////

include/boost/lambda/lambda.hpp

@@ -24,11 +24,6 @@
 
 
 #include "boost/lambda/detail/operators.hpp"
-
-#ifndef BOOST_LAMBDA_FAILS_IN_TEMPLATE_KEYWORD_AFTER_SCOPE_OPER
-// sorry, member ptr does not work with gcc2.95
 #include "boost/lambda/detail/member_ptr.hpp"
-#endif
-
 
 #endif

include/boost/lambda/loops.hpp

@@ -348,7 +348,7 @@ while_(CondT const& cond)
 //      While the condition (an lambda_functor) evaluates to true, statement
 //      (another lambda_functor) is executed. The statement is executed at least
 //      once. The result type of this is void. Note the trailing
-//      underscore after do_ and the the leading dot and the trailing
+//      underscore after do_ and the leading dot and the trailing
 //      underscore before and after .while_.
 //
 ///////////////////////////////////////////////////////////////////////////////

meta/libraries.json

@@ -0,0 +1,15 @@
+{
+    "key": "lambda",
+    "name": "Lambda",
+    "authors": [
+        "Jaakko Järvi",
+        "Gary Powell"
+    ],
+    "description": "Define small unnamed function objects at the actual call site, and more.",
+    "category": [
+        "Function-objects"
+    ],
+    "maintainers": [
+        "Jaakko Jarvi <jarvi -at- cs.tamu.edu>"
+    ]
+}

test/bind_tests_advanced.cpp

@@ -121,8 +121,16 @@ void test_unlambda() {
 
   BOOST_CHECK(call_with_101(_1 + 1) == 102);
 
+#if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
   BOOST_CHECK(call_with_100(bl::bind(std_functor(std::bind1st(std::plus<int>(), 1)), _1)) == 101);
 
+#else
+
+  BOOST_CHECK(call_with_100(bl::bind(std_functor(std::bind(std::plus<int>(), 1, std::placeholders::_1)), _1)) == 101);
+
+#endif
+
   // std_functor insturcts LL that the functor defines a result_type typedef
   // rather than a sig template.
   bl::bind(std_functor(std::plus<int>()), _1, _2)(i, i);

test/result_of_tests.cpp

@@ -299,7 +299,7 @@ int test_main(int, char *[]) {
     BOOST_CHECK(boost::lambda::bind(with_result_template_reference(), var(one), var(two), var(three), var(four), var(five), var(six), var(seven), var(eight), var(nine))() == 9);
 
     // Check using result_of with lambda functors
-    //BOOST_CHECK(apply0(constant(0)) == 0);
+    BOOST_CHECK(apply0(constant(0)) == 0);
     BOOST_CHECK(apply1<int>(_1, one) == 1);
     BOOST_CHECK(apply1<int&>(_1, one) == 1);
     BOOST_CHECK(apply1<const int&>(_1, one) == 1);