Add BOOST_NO_CXX17_FOLD_EXPRESSIONS detection

test/all/Jamfile.v2

@@ -1,7 +1,7 @@
 #
 # Regression test Jamfile for boost configuration setup.
 # *** DO NOT EDIT THIS FILE BY HAND ***
-# This file was automatically generated on Mon May 29 10:00:26 2017
+# This file was automatically generated on Mon May 29 10:27:35 2017
 #  by libs/config/tools/generate.cpp
 # Copyright John Maddock.
 # Use, modification and distribution are subject to the 
@@ -316,6 +316,9 @@ test-suite "BOOST_NO_CXX14_STD_EXCHANGE" :
 test-suite "BOOST_NO_CXX14_VARIABLE_TEMPLATES" : 
 [ run ../no_cxx14_var_templ_pass.cpp ]
 [ compile-fail ../no_cxx14_var_templ_fail.cpp ] ;
+test-suite "BOOST_NO_CXX17_FOLD_EXPRESSIONS" : 
+[ run ../no_cxx17_fold_expressions_pass.cpp ]
+[ compile-fail ../no_cxx17_fold_expressions_fail.cpp ] ;
 test-suite "BOOST_NO_CXX17_INLINE_VARIABLES" : 
 [ run ../no_cxx17_inline_variables_pass.cpp ]
 [ compile-fail ../no_cxx17_inline_variables_fail.cpp ] ;

test/boost_no_cxx17_fold_expressions.ipp

@@ -0,0 +1,27 @@
+/*
+Copyright 2017 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under Boost Software License, Version 1.0.
+(See accompanying file LICENSE_1_0.txt or copy at
+http://www.boost.org/LICENSE_1_0.txt)
+*/
+
+// MACRO: BOOST_NO_CXX17_FOLD_EXPRESSIONS
+// TITLE: C++17 fold expressions
+// DESCRIPTION: C++17 fold expressions are not supported.
+
+namespace boost_no_cxx17_fold_expressions {
+
+template<class... Args>
+auto sum(Args&&... args)
+{
+    return (args + ... + 0);
+}
+
+int test()
+{
+    return sum(1, -1, 1, 1, -1, -1);
+}
+
+} /* boost_no_cxx17_fold_expressions */

test/config_info.cpp

@@ -1067,6 +1067,7 @@ void print_boost_macros()
    PRINT_MACRO(BOOST_NO_CXX14_RETURN_TYPE_DEDUCTION);
    PRINT_MACRO(BOOST_NO_CXX14_STD_EXCHANGE);
    PRINT_MACRO(BOOST_NO_CXX14_VARIABLE_TEMPLATES);
+   PRINT_MACRO(BOOST_NO_CXX17_FOLD_EXPRESSIONS);
    PRINT_MACRO(BOOST_NO_CXX17_INLINE_VARIABLES);
    PRINT_MACRO(BOOST_NO_CXX17_STD_APPLY);
    PRINT_MACRO(BOOST_NO_CXX17_STD_INVOKE);
@@ -1160,6 +1161,7 @@ void print_boost_macros()
 
 
 
+
 
 
    // END GENERATED BLOCK

test/config_test.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Mon May 29 10:00:26 2017
+//  This file was automatically generated on Mon May 29 10:27:35 2017
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 
@@ -332,6 +332,11 @@ namespace boost_no_cxx14_std_exchange = empty_boost;
 #else
 namespace boost_no_cxx14_variable_templates = empty_boost;
 #endif
+#ifndef BOOST_NO_CXX17_FOLD_EXPRESSIONS
+#include "boost_no_cxx17_fold_expressions.ipp"
+#else
+namespace boost_no_cxx17_fold_expressions = empty_boost;
+#endif
 #ifndef BOOST_NO_CXX17_INLINE_VARIABLES
 #include "boost_no_cxx17_inline_variables.ipp"
 #else
@@ -1461,6 +1466,11 @@ int main( int, char *[] )
       std::cerr << "Failed test for BOOST_NO_CXX14_VARIABLE_TEMPLATES at: " << __FILE__ << ":" << __LINE__ << std::endl;
       ++error_count;
    }
+   if(0 != boost_no_cxx17_fold_expressions::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX17_FOLD_EXPRESSIONS at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
    if(0 != boost_no_cxx17_inline_variables::test())
    {
       std::cerr << "Failed test for BOOST_NO_CXX17_INLINE_VARIABLES at: " << __FILE__ << ":" << __LINE__ << std::endl;

test/no_cxx17_fold_expressions_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Mon May 29 10:27:35 2017
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-4.
+//  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)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX17_FOLD_EXPRESSIONS
+// This file should not compile, if it does then
+// BOOST_NO_CXX17_FOLD_EXPRESSIONS should not be defined.
+// See file boost_no_cxx17_fold_expressions.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifdef BOOST_NO_CXX17_FOLD_EXPRESSIONS
+#include "boost_no_cxx17_fold_expressions.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx17_fold_expressions::test();
+}
+

test/no_cxx17_fold_expressions_pass.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Mon May 29 10:27:35 2017
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-4.
+//  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)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX17_FOLD_EXPRESSIONS
+// This file should compile, if it does not then
+// BOOST_NO_CXX17_FOLD_EXPRESSIONS should be defined.
+// See file boost_no_cxx17_fold_expressions.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifndef BOOST_NO_CXX17_FOLD_EXPRESSIONS
+#include "boost_no_cxx17_fold_expressions.ipp"
+#else
+namespace boost_no_cxx17_fold_expressions = empty_boost;
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx17_fold_expressions::test();
+}
+