solve lvalue problem in container shift; refs #7

ax_cxx_compile_stdcxx_11.m4

@@ -0,0 +1,133 @@
+# ============================================================================
+#  http://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx_11.html
+# ============================================================================
+#
+# SYNOPSIS
+#
+#   AX_CXX_COMPILE_STDCXX_11([ext|noext],[mandatory|optional])
+#
+# DESCRIPTION
+#
+#   Check for baseline language coverage in the compiler for the C++11
+#   standard; if necessary, add switches to CXXFLAGS to enable support.
+#
+#   The first argument, if specified, indicates whether you insist on an
+#   extended mode (e.g. -std=gnu++11) or a strict conformance mode (e.g.
+#   -std=c++11).  If neither is specified, you get whatever works, with
+#   preference for an extended mode.
+#
+#   The second argument, if specified 'mandatory' or if left unspecified,
+#   indicates that baseline C++11 support is required and that the macro
+#   should error out if no mode with that support is found.  If specified
+#   'optional', then configuration proceeds regardless, after defining
+#   HAVE_CXX11 if and only if a supporting mode is found.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
+#   Copyright (c) 2012 Zack Weinberg <zackw@panix.com>
+#   Copyright (c) 2013 Roy Stogner <roystgnr@ices.utexas.edu>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 3
+
+m4_define([_AX_CXX_COMPILE_STDCXX_11_testbody], [
+  template <typename T>
+    struct check
+    {
+      static_assert(sizeof(int) <= sizeof(T), "not big enough");
+    };
+
+    typedef check<check<bool>> right_angle_brackets;
+
+    int a;
+    decltype(a) b;
+
+    typedef check<int> check_type;
+    check_type c;
+    check_type&& cr = static_cast<check_type&&>(c);
+
+    auto d = a;
+])
+
+AC_DEFUN([AX_CXX_COMPILE_STDCXX_11], [dnl
+  m4_if([$1], [], [],
+        [$1], [ext], [],
+        [$1], [noext], [],
+        [m4_fatal([invalid argument `$1' to AX_CXX_COMPILE_STDCXX_11])])dnl
+  m4_if([$2], [], [ax_cxx_compile_cxx11_required=true],
+        [$2], [mandatory], [ax_cxx_compile_cxx11_required=true],
+        [$2], [optional], [ax_cxx_compile_cxx11_required=false],
+        [m4_fatal([invalid second argument `$2' to AX_CXX_COMPILE_STDCXX_11])])dnl
+  AC_LANG_PUSH([C++])dnl
+  ac_success=no
+  AC_CACHE_CHECK(whether $CXX supports C++11 features by default,
+  ax_cv_cxx_compile_cxx11,
+  [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_11_testbody])],
+    [ax_cv_cxx_compile_cxx11=yes],
+    [ax_cv_cxx_compile_cxx11=no])])
+  if test x$ax_cv_cxx_compile_cxx11 = xyes; then
+    ac_success=yes
+  fi
+
+  m4_if([$1], [noext], [], [dnl
+  if test x$ac_success = xno; then
+    for switch in -std=gnu++11 -std=gnu++0x; do
+      cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx11_$switch])
+      AC_CACHE_CHECK(whether $CXX supports C++11 features with $switch,
+                     $cachevar,
+        [ac_save_CXXFLAGS="$CXXFLAGS"
+         CXXFLAGS="$CXXFLAGS $switch"
+         AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_11_testbody])],
+          [eval $cachevar=yes],
+          [eval $cachevar=no])
+         CXXFLAGS="$ac_save_CXXFLAGS"])
+      if eval test x\$$cachevar = xyes; then
+        CXXFLAGS="$CXXFLAGS $switch"
+        ac_success=yes
+        break
+      fi
+    done
+  fi])
+
+  m4_if([$1], [ext], [], [dnl
+  if test x$ac_success = xno; then
+    for switch in -std=c++11 -std=c++0x; do
+      cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx11_$switch])
+      AC_CACHE_CHECK(whether $CXX supports C++11 features with $switch,
+                     $cachevar,
+        [ac_save_CXXFLAGS="$CXXFLAGS"
+         CXXFLAGS="$CXXFLAGS $switch"
+         AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_11_testbody])],
+          [eval $cachevar=yes],
+          [eval $cachevar=no])
+         CXXFLAGS="$ac_save_CXXFLAGS"])
+      if eval test x\$$cachevar = xyes; then
+        CXXFLAGS="$CXXFLAGS $switch"
+        ac_success=yes
+        break
+      fi
+    done
+  fi])
+  AC_LANG_POP([C++])
+  if test x$ax_cxx_compile_cxx11_required = xtrue; then
+    if test x$ac_success = xno; then
+      AC_MSG_ERROR([*** A compiler with support for C++11 language features is required.])
+    fi
+  else
+    if test x$ac_success = xno; then
+      HAVE_CXX11=0
+      AC_MSG_NOTICE([No compiler with C++11 support was found])
+    else
+      HAVE_CXX11=1
+      AC_DEFINE(HAVE_CXX11,1,
+                [define if the compiler supports basic C++11 syntax])
+    fi
+
+    AC_SUBST(HAVE_CXX11)
+  fi
+])

configure.in

@@ -1,4 +1,5 @@
 # $Id$
+m4_include(ax_cxx_compile_stdcxx_11.m4)
 AC_ALIAS([AC_DEFINE_DIR], [AX_DEFINE_DIR])
 AC_DEFUN([AX_DEFINE_DIR], [
   prefix_NONE=
@@ -83,6 +84,7 @@ CXXFLAGS="${CXXFLAGS:-}"
 
 # languages
 AC_LANG(C++)
+AX_CXX_COMPILE_STDCXX_11(noext, optional)
 
 # programs
 AC_PROG_CXX

doc/examples/arguments.cxx

@@ -6,6 +6,9 @@
 // 45678901234567890123456789012345678901234567890123456789012345678901234567890
 
 #include <mrw/args.hxx>
+#ifdef MRW__OLD_PRE11_COMPILER
+#include <mrw/vector.hxx>
+#endif
 
 void test_func() {
   std::cout<<"test parameter was given on command line"<<std::endl;
@@ -19,48 +22,46 @@ int main(int argc, char** argv) try {
   std::string txt("Hello World");
   int x(0), y(0);
 
+  std::string description("This is an example for argument processing. If the "
+                          "description is very long, it is automatically "
+                          "splitted over several lines and indented on each "
+                          "new line. Arguments may have several parameters. "
+                          "Help is generated automatically from the argument "
+                          "declaration. The argument declaration contains long "
+                          "and short options and a list of parameters.");
+  std::string returns("Returns a status of 0 on success and 1 on any error.");
+
   // bind and evaluate options
-#ifdef ARGS__OLD_PRE11_COMPILER
+#ifdef MRW__OLD_PRE11_COMPILER
-  mrw::args::list options;
+  mrw::args::list l;
-  std::vector<std::shared_ptr<mrw::args::abstract_parameter> > params;
+  mrw::args::decl::param_list pl = mrw::args::decl::param_list();
-  params.push_back(mrw::args::help());
+  (mrw::args::decl::param_list())<<mrw::args::param(flag);
-  params.push_back(mrw::args::exit());
+  l<<mrw::args::decl("f", "flag", "check a flag", pl);
-  options.push_back(mrw::args::declaration("h", "help", "show this help",
+  mrw::args::parse(argc, argv, description, mrw::args::list()
-                                           params));
+                   <<mrw::args::decl("h", "help", "show this help",
-  params.clear();
+                                     mrw::args::decl::param_list()
-  params.push_back(mrw::args::param(r, "number"));
+                                     <<mrw::args::help()
-  options.push_back(mrw::args::declaration("r", "repeat",
+                                     <<mrw::args::exit())
-                                           "number of repetitions",
+                   <<mrw::args::decl("r", "repeat", "number of repetitions",
-                                           params));
+                                     mrw::args::decl::param_list()
-  params.clear();
+                                     <<mrw::args::param(r, "number"))
-  params.push_back(mrw::args::param(flag));
+                   <<mrw::args::decl("f", "flag", "check a flag",
-  options.push_back(mrw::args::declaration("f", "flag", "check a flag",
+                                     mrw::args::decl::param_list()
-                                           params));
+                                     <<mrw::args::param(flag))
-  params.clear();
+                   <<mrw::args::decl("t", "text", "pass a text",
-  params.push_back(mrw::args::param(txt, "text"));
+                                     mrw::args::decl::param_list()
-  options.push_back(mrw::args::declaration("t", "text", "pass a text", params));
+                                     <<mrw::args::param(txt, "text"))
-  params.clear();
+                   <<mrw::args::decl("c", "coord", "add some 2D coordinates",
-  params.push_back(mrw::args::param(x, "x"));
+                                     mrw::args::decl::param_list()
-  params.push_back(mrw::args::param(y, "y"));
+                                     <<mrw::args::param(x, "x")
-  options.push_back(mrw::args::declaration("c", "coord",
+                                     <<mrw::args::param(y, "y"))
-                                           "add some 2D coordinates",
+                   <<mrw::args::decl("",  "test", "call test_func, no shortcut",
-                                           params));
+                                     mrw::args::decl::param_list()
-  params.clear();
+                                     <<mrw::args::func(test_func)),
-  params.push_back(mrw::args::func(test_func));
+                   returns);
-  options.push_back(mrw::args::declaration("",  "test",
-                                           "call test_func, no shortcut",
-                                           params));
-  mrw::args::parse(argc, argv, "This is an example for argument processing.",
-                   options);
 #else
   mrw::args::parse(argc, argv,
-                   "This is an example for argument processing. If the"
+                   description,
-                   " description is very long, it is automatically splitted"
-                   " over several lines and indented on each new line."
-                   " Arguments may have several parameters. Help is"
-                   " generated automatically from the argument declaration."
-                   " The argument declaration contains long and short options"
-                   " and a list of parameters.",
                    {
                      {"h", "help", "show this help",
                          {mrw::args::help(), mrw::args::exit()}},
@@ -80,7 +81,7 @@ int main(int argc, char** argv) try {
                      {"",  "test", "call test_func, no shortcut",
                          {mrw::args::func(test_func)}},
                    },
-                   "Returns a status of 0 on success and 1 on any error.");
+                   returns);
 #endif
   
   // show the result

makefile.am

@@ -57,7 +57,7 @@ distclean-local:
 	- rm -r ${top_builddir}/@DOC_DIR@/html/* ${top_builddir}/@DOC_DIR@/latex/*
 	- rm makefile makefile.in doxygen.err libmrw.doxytag
 	- find . -name '*~' | xargs rm
-	- rm -r autom4te.cache
+	- rm -r autom4te.cache SPECS RPMS BUILD BUILDROOT SRPMS
 	- rm aclocal.m4 config.guess config.sub configure \
 	     depcomp install-sh ltmain.sh makefile makefile.in \
-	     missing mkinstalldirs SPECS RPMS BUILD BUILDROOT SRPMS
+	     missing mkinstalldirs

src/makefile.am

@@ -14,7 +14,8 @@ nobase_include_HEADERS = mrw/arg.hxx mrw/auto.hxx mrw/configfile.hxx	\
                          mrw/smartpointer.hxx mrw/stacktrace.hxx	\
                          mrw/stdext.hxx mrw/string.hxx			\
                          mrw/tokenizer.hxx mrw/unistd.hxx		\
-                         mrw/vector.hxx mrw/args.hxx mrw/iomanip.hxx
+                         mrw/vector.hxx mrw/args.hxx mrw/iomanip.hxx	\
+                         mrw/checkcxx11.hxx
 
 if HAVE_STACKTRACE
   AM_CPPFLAGS += -DHAVE_STACKTRACE

src/mrw/args.hxx

@@ -4,9 +4,10 @@
 */
 //       1         2         3         4         5         6         7         8
 // 45678901234567890123456789012345678901234567890123456789012345678901234567890
-#ifndef __ARGS__
+#ifndef __MRW__
-#define __ARGS__
+#define __MRW__
 
+#include <mrw/checkcxx11.hxx>
 #include <mrw/iomanip.hxx>
 
 #include <vector>
@@ -19,43 +20,12 @@
 #include <numeric>
 #include <cstdlib> // exit()
 
-// check if code is compiled with a new C++11 compiler
-// otherwise there is a fallback wich makes everything much more compliacted
-#ifndef ARGS__OLD_PRE11_COMPILER
-#if __cplusplus < 201103L
-/// Code is compiled with an old non C++11 standard compliant compiler
-/** There are workarounds for old non C++11 compatible
-    compilers. These workarounds are deprecated, but will remain until
-    most compilers fully support C++11. So this workaround will be
-    removed in future releases, when support for C++11 is more
-    common. Only rely on this workaround, if you really have to.
-    @see oldcompiler for details on usage */
-#define ARGS__OLD_PRE11_COMPILER
-#warning You need a C++11 compliant compiler, on gcc use option -std=c++11
-#warning emulating C++11 - this changes the way you use the library
-#warning this is deprecated and will be removed in future releases
-#warning refere to the library documentation for more details
-#endif
-#endif
-
 /** @page oldcompiler Workaround for old non C++11 compilers
     ... to be documented
     @note Old compilers are automatically detected and the flag
-          @refs ARGS__OLD_PRE11_COMPILER is set.
+          @refs MRW__OLD_PRE11_COMPILER is set.
     */
 
-#ifdef ARGS__OLD_PRE11_COMPILER
-#include <boost/shared_ptr.hpp>
-namespace std {
-  // there is no std::shared_ptr in pre C++11 compilers, so we use the
-  // one from the boost library as a 1:1 replacement
-  template <typename T> class shared_ptr: public boost::shared_ptr<T> {
-    public:
-      explicit shared_ptr(T* p): boost::shared_ptr<T>(p) {}
-  };
-};
-#endif
-
 namespace mrw {
   /// Cool and easy evaluation of commandline arguments in C++11.
   /** Evaluating command line arguments is extremely easy with this library:
@@ -198,46 +168,44 @@ namespace mrw {
       private:
         void(*_ref)();
     };
+    typedef std::shared_ptr<abstract_parameter> param_ptr;
     template<typename T>
-        std::shared_ptr<abstract_parameter> param
+        param_ptr param(T& t, const std::string& s = std::string()) {
-        (T& t, const std::string& s = std::string()) {
+      return param_ptr(new args::parameter<T>(t, s));
-      return std::shared_ptr<abstract_parameter>(new args::parameter<T>(t, s));
     }
-    struct declaration {
+    struct decl {
-#ifdef ARGS__OLD_PRE11_COMPILER
+        typedef std::vector<param_ptr> param_list;
-        declaration(std::string p1, std::string p2, std::string p3,
+#ifdef MRW__OLD_PRE11_COMPILER
-                    std::vector<std::shared_ptr<abstract_parameter> > p4):
+        decl(std::string p1, std::string p2, std::string p3, param_list p4):
             short_arg(p1), long_arg(p2), desc(p3), params(p4) {
         }
 #endif
         std::string short_arg;
         std::string long_arg;
         std::string desc;
-        std::vector<std::shared_ptr<abstract_parameter> > params;
+        param_list params;
     };
-    typedef std::map<std::string,
+    typedef std::map<std::string, decl::param_list> arg_map;
-        std::vector<std::shared_ptr<abstract_parameter> > >
-        arg_map;
     static arg_map& args() {
       static arg_map a;
       return a;
     }
-    typedef std::vector<declaration> list;
+    typedef std::vector<decl> list;
     static list& arg_list() {
       static list a;
       return a;
     }
     void match(const std::string& arg, char**& a, char** max) {
-#ifdef ARGS__OLD_PRE11_COMPILER
+#ifdef MRW__OLD_PRE11_COMPILER
       arg_map::iterator it(args().find(arg));
 #else
       auto it(args().find(arg));
 #endif
       if (it==args().end())
         throw std::runtime_error("unknown argument: "+std::string(*a));
-#ifdef ARGS__OLD_PRE11_COMPILER
+#ifdef MRW__OLD_PRE11_COMPILER
-      for (std::vector<std::shared_ptr<abstract_parameter> >::iterator
+      for (decl::param_list::iterator it2(it->second.begin());
-             it2(it->second.begin()); it2!=it->second.end(); ++it2)
+           it2!=it->second.end(); ++it2)
 #else
       for (auto it2(it->second.begin()); it2!=it->second.end(); ++it2)
 #endif
@@ -282,7 +250,7 @@ namespace mrw {
       returns(ret);      // store return documentation for later use in help
       arg_list() = l;    // store options and parameters for later use in help
       // setup the argument mapping table
-#ifdef ARGS__OLD_PRE11_COMPILER
+#ifdef MRW__OLD_PRE11_COMPILER
       for (list::iterator it(l.begin()); it!=l.end(); ++it)
 #else
       for (auto it(l.begin()); it!=l.end(); ++it)
@@ -292,7 +260,7 @@ namespace mrw {
           if (it->long_arg.size()) args()["--"+it->long_arg] = it->params;
         }
       // parse commandline and evaluate the arguments
-#ifdef ARGS__OLD_PRE11_COMPILER
+#ifdef MRW__OLD_PRE11_COMPILER
       for (char** a(argv+1); a<argv+argc; ++a)
 #else
       for (auto a(argv+1); a<argv+argc; ++a)
@@ -300,7 +268,7 @@ namespace mrw {
         {
           std::string arg(*a);
           if (arg.size()>1&&arg[0]=='-'&&arg[1]!='-') { // short argument
-#ifdef ARGS__OLD_PRE11_COMPILER
+#ifdef MRW__OLD_PRE11_COMPILER
             for (std::string::iterator it(arg.begin()+1); it!=arg.end(); ++it)
 #else
             for (auto it(arg.begin()+1); it!=arg.end(); ++it)
@@ -320,10 +288,10 @@ namespace mrw {
       std::cout<<synopsis_txt<<std::endl<<std::endl
                <<"  "<<filename()<<" ["<<options_txt<<"]"<<std::endl<<std::endl
                <<description_txt<<std::endl<<std::endl
-               <<split(max_line, indent)<<description(); //! @bug
+               <<ssplit(max_line, indent)<<description(); //! @bug
       std::cout<<std::endl<<std::endl
                <<options_txt<<std::endl;
-#ifdef ARGS__OLD_PRE11_COMPILER
+#ifdef MRW__OLD_PRE11_COMPILER
       for (list::iterator arg(arg_list().begin()); arg!=arg_list().end(); ++arg)
 #else
       for (auto arg(arg_list().begin()); arg!=arg_list().end(); ++arg)
@@ -332,10 +300,9 @@ namespace mrw {
           std::string o((arg->short_arg.size()?"-"+arg->short_arg:"")+
                         (arg->short_arg.size()&&arg->long_arg.size()?", ":"")+
                         (arg->long_arg.size()?"--"+arg->long_arg:""));
-#ifdef ARGS__OLD_PRE11_COMPILER
+#ifdef MRW__OLD_PRE11_COMPILER
           std::string a;
-          for (std::vector<std::shared_ptr<abstract_parameter> >::iterator
+          for (decl::param_list::iterator p(arg->params.begin());
-                 p(arg->params.begin());
                p!=arg->params.end(); ++p) {
             std::string def(**p);
             a+=(*p)->type()+(def.size()?"="+def:"");
@@ -344,17 +311,18 @@ namespace mrw {
           std::string a(std::accumulate(arg->params.begin(), arg->params.end(),
                                         std::string(),
                                         [](const std::string& s,
-                                           std::shared_ptr<abstract_parameter> p)
+                                           param_ptr p)
                                         -> std::string {
-                                          std::string def(**p);
+                                          std::string def(*p);
-                                          return s+p->type()+(def.size()?"="+def:"");
+                                          return
+                                            s+p->type()+(def.size()?"="+def:"");
                                         }));
 #endif
         std::cout<<std::endl<<"  "
                  <<o<<std::setw(option_len-o.size())<<' '
                  <<a;
         if (arg->desc.size()>max_line-indent-option_len-param_len)
-          std::cout<<std::endl<<std::endl<<split(max_line, long_indent)
+          std::cout<<std::endl<<std::endl<<ssplit(max_line, long_indent)
                    <<arg->desc;
         else
           std::cout<<std::setw(param_len-a.size())<<' '<<arg->desc;
@@ -362,7 +330,7 @@ namespace mrw {
         }
       if (returns().size()) {
         std::cout<<std::endl<<returns_txt<<std::endl<<std::endl
-                 <<split(max_line, indent)<<returns();
+                 <<ssplit(max_line, indent)<<returns();
         std::cout<<std::endl;
       }
     }
@@ -372,15 +340,13 @@ namespace mrw {
     void do_exit() {
       exit(1);
     }
-    std::shared_ptr<args::abstract_parameter> func(void(*fn)()) {
+    param_ptr func(void(*fn)()) {
-      return
+      return param_ptr(new args::parameter<void(*)()>(fn));
-        std::shared_ptr<args::abstract_parameter>
-        (new args::parameter<void(*)()>(fn));
     }
-    std::shared_ptr<args::abstract_parameter> help() {
+    param_ptr help() {
       return func(args::help_no_arg);
     }
-    std::shared_ptr<args::abstract_parameter> exit() {
+    param_ptr exit() {
       return func(args::do_exit);
     }
   }

src/mrw/checkcxx11.hxx

@@ -0,0 +1,42 @@
+/*! @file
+
+    @id $Id$
+*/
+//       1         2         3         4         5         6         7         8
+// 45678901234567890123456789012345678901234567890123456789012345678901234567890
+
+#ifndef __MRW__CHECKCXX11__
+#define __MRW__CHECKCXX11__
+
+// check if code is compiled with a new C++11 compiler
+// otherwise there is a fallback wich makes everything much more compliacted
+#  ifndef MRW__OLD_PRE11_COMPILER
+#    if __cplusplus < 201103L
+       /// Code is compiled with an old non C++11 standard compliant compiler
+       /** There are workarounds for old non C++11 compatible
+           compilers. These workarounds are deprecated, but will remain until
+            most compilers fully support C++11. So this workaround will be
+            removed in future releases, when support for C++11 is more
+            common. Only rely on this workaround, if you really have to. */
+#      define MRW__OLD_PRE11_COMPILER
+#      warning You need a C++11 compliant compiler, on gcc use option -std=c++11
+#      warning emulating C++11 - this changes the way you use the library
+#      warning this is deprecated and will be removed in future releases
+#      warning refere to the library documentation for more details
+#    endif
+#  endif
+
+
+#  ifdef MRW__OLD_PRE11_COMPILER
+#    include <boost/shared_ptr.hpp>
+namespace std {
+  // there is no std::shared_ptr in pre C++11 compilers, so we use the
+  // one from the boost library as a 1:1 replacement
+  template <typename T> class shared_ptr: public boost::shared_ptr<T> {
+    public:
+      explicit shared_ptr(T* p): boost::shared_ptr<T>(p) {}
+  };
+};
+#  endif
+
+#endif

src/mrw/deque.hxx

@@ -27,6 +27,7 @@
 #define __MRW__DEQUE__HPP__
 
 #include <deque>
+#include <mrw/checkcxx11.hxx>
 #include <mrw/exception.hxx>
 #include <mrw/string.hxx>
 
@@ -48,11 +49,21 @@
     @param o a value to be inserted into deque @c l
     @pre \#include <mrw/deque.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename T, typename A>
-std::deque<T, A>& operator<<(std::deque<T, A>& l, const T& o) throw(std::bad_exception) {
+    std::deque<T, A> operator<<(std::deque<T, A> l, const T& o)
+    throw(std::bad_exception) {
   l.push_back(o);
   return l;
 }
+#else
+template <typename T, typename A>
+    std::deque<T, A>&& operator<<(std::deque<T, A>&& l, const T& o)
+    throw(std::bad_exception) {
+  l.push_back(o);
+  return l;
+}
+#endif
 
 /** @brief extract the first value of a deque
 
@@ -72,8 +83,10 @@ std::deque<T, A>& operator<<(std::deque<T, A>& l, const T& o) throw(std::bad_exc
     shortened by the shifted element
     @pre \#include <mrw/deque.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename T, typename A>
-std::deque<T, A>& operator>>(std::deque<T, A>& l, T& o) throw(std::exception) {
+    std::deque<T, A> operator>>(std::deque<T, A> l, T& o)
+    throw(std::exception) {
   typename std::deque<T, A>::iterator it(l.begin());
   if (it==l.end())
     throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
@@ -83,6 +96,20 @@ std::deque<T, A>& operator>>(std::deque<T, A>& l, T& o) throw(std::exception) {
   l.erase(it);
   return l;
 }
+#else
+template <typename T, typename A>
+    std::deque<T, A>&& operator>>(std::deque<T, A>&& l, T& o)
+    throw(std::exception) {
+  typename std::deque<T, A>::iterator it(l.begin());
+  if (it==l.end())
+    throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
+                            ": std::deque<>& operator>>(std::deque<>&, T&),"
+                            " deque is empty");
+  o = *it;
+  l.erase(it);
+  return l;
+}
+#endif
 
 //@}
 //@}

src/mrw/iomanip.hxx

@@ -15,7 +15,7 @@
 
 // check if code is compiled with a new C++11 compiler
 // otherwise there is a fallback wich makes everything much more compliacted
-#ifndef ARGS__OLD_PRE11_COMPILER
+#ifndef MRW__OLD_PRE11_COMPILER
 #if __cplusplus < 201103L
 /// Code is compiled with an old non C++11 standard compliant compiler
 /** There are workarounds for old non C++11 compatible
@@ -24,7 +24,7 @@
     removed in future releases, when support for C++11 is more
     common. Only rely on this workaround, if you really have to.
     @see oldcompiler for details on usage */
-#define ARGS__OLD_PRE11_COMPILER
+#define MRW__OLD_PRE11_COMPILER
 #warning You need a C++11 compliant compiler, on gcc use option -std=c++11
 #warning emulating C++11 - this changes the way you use the library
 #warning this is deprecated and will be removed in future releases
@@ -41,7 +41,7 @@ namespace mrw {
       basic_split(int width=80, int indent=0, char fill=' '):
           _width(width), _indent(indent), _fill(fill), _os(0) {
         if (_width<_indent)
-#ifdef ARGS__OLD_PRE11_COMPILER
+#ifdef MRW__OLD_PRE11_COMPILER
           throw std::runtime_error(((std::stringstream&)
                                     (std::stringstream()
                                      <<"wrong use of split: width is "<<_width
@@ -100,6 +100,6 @@ namespace mrw {
       std::stringstream _buffer;
       std::basic_ostream<_CharT, _Traits>* _os;
   };
-  typedef basic_split<char> split;
+  typedef basic_split<char> ssplit;
 }
 #endif

src/mrw/map.hxx

@@ -27,6 +27,7 @@
 #define __MRW__MAP__HPP__
 
 #include <map>
+#include <mrw/checkcxx11.hxx>
 #include <mrw/exception.hxx>
 #include <mrw/string.hxx>
 
@@ -50,8 +51,10 @@
     @param o a value to be inserted into map @c l
     @pre \#include <mrw/map.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename K, typename T, class C, typename A>
-std::map<K, T, C, A>& operator<<(std::map<K, T, C, A>& l, const std::pair<K, T>& o)
+    std::map<K, T, C, A> operator<<(std::map<K, T, C, A> l,
+                                     const std::pair<K, T>& o)
   throw(std::exception) {
   if (!l.insert(o).second)
     throw mrw::invalid_argument(std::string(__FILE__ ":")+__LINE__+
@@ -60,6 +63,19 @@ std::map<K, T, C, A>& operator<<(std::map<K, T, C, A>& l, const std::pair<K, T>&
                                 "map element already exists");
   return l;
 }
+#else
+template <typename K, typename T, class C, typename A>
+    std::map<K, T, C, A>&& operator<<(std::map<K, T, C, A>&& l,
+                                     const std::pair<K, T>& o)
+  throw(std::exception) {
+  if (!l.insert(o).second)
+    throw mrw::invalid_argument(std::string(__FILE__ ":")+__LINE__+
+                                ": std::map<>&"
+                                " operator<<(std::map<>&, const T&),"
+                                "map element already exists");
+  return l;
+}
+#endif
 
 /** @brief extract the first value of a map
 
@@ -80,8 +96,9 @@ std::map<K, T, C, A>& operator<<(std::map<K, T, C, A>& l, const std::pair<K, T>&
     shortened by the shifted element
     @pre \#include <mrw/map.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename K, typename T, class C, typename A>
-std::map<K, T, C, A>& operator>>(std::map<K, T, C, A>& l, std::pair<K, T>& o)
+    std::map<K, T, C, A> operator>>(std::map<K, T, C, A> l, std::pair<K, T>& o)
     throw(std::exception) {
   typename std::map<K, T, C, A>::iterator it(l.begin());
   if (it==l.end())
@@ -92,6 +109,21 @@ std::map<K, T, C, A>& operator>>(std::map<K, T, C, A>& l, std::pair<K, T>& o)
   l.erase(it);
   return l;
 }
+#else
+template <typename K, typename T, class C, typename A>
+    std::map<K, T, C, A>&& operator>>(std::map<K, T, C, A>&& l,
+                                      std::pair<K, T>& o)
+    throw(std::exception) {
+  typename std::map<K, T, C, A>::iterator it(l.begin());
+  if (it==l.end())
+    throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
+                            ": std::map<>& operator>>(std::map<>&, T&),"
+                            " map is empty");
+  o = *it;
+  l.erase(it);
+  return l;
+}
+#endif
 
 //@}
 //@}

src/mrw/multimap.hxx

@@ -27,6 +27,7 @@
 #define __MRW__MULTIMAP__HPP__
 
 #include <map>
+#include <mrw/checkcxx11.hxx>
 #include <mrw/exception.hxx>
 #include <mrw/string.hxx>
 
@@ -50,12 +51,23 @@
     @param o a value to be inserted into multimap @c l
     @pre \#include <mrw/multimap.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename K, typename T, class C, typename A>
-std::multimap<K, T, C, A>& operator<<(std::multimap<K, T, C, A>& l, const std::pair<K, T>& o)
+    std::multimap<K, T, C, A> operator<<(std::multimap<K, T, C, A> l,
+                                         const std::pair<K, T>& o)
     throw(std::bad_exception) {
   l.insert(o);
   return l;
 }
+#else
+template <typename K, typename T, class C, typename A>&&
+    std::multimap<K, T, C, A> operator<<(std::multimap<K, T, C, A>&& l,
+                                         const std::pair<K, T>& o)
+    throw(std::bad_exception) {
+  l.insert(o);
+  return l;
+}
+#endif
 
 /** @brief extract the first value of a multimap
 
@@ -76,18 +88,35 @@ std::multimap<K, T, C, A>& operator<<(std::multimap<K, T, C, A>& l, const std::p
     shortened by the shifted element
     @pre \#include <mrw/multimap.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename K, typename T, class C, typename A>
-std::multimap<K, T, C, A>& operator>>(std::multimap<K, T, C, A>& l, std::pair<K, T>& o)
+    std::multimap<K, T, C, A> operator>>(std::multimap<K, T, C, A> l,
+                                         std::pair<K, T>& o)
     throw(std::exception) {
   typename std::multimap<K, T, C, A>::iterator it(l.begin());
   if (it==l.end())
     throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
-                            ": std::multimap<>& operator>>(std::multimap<>&, T&),"
+                            ": std::multimap<>::operator>>,"
                             " multimap is empty");
   o = *it;
   l.erase(it);
   return l;
 }
+#else
+template <typename K, typename T, class C, typename A>
+    std::multimap<K, T, C, A>&& operator>>(std::multimap<K, T, C, A>&& l,
+                                           std::pair<K, T>& o)
+    throw(std::exception) {
+  typename std::multimap<K, T, C, A>::iterator it(l.begin());
+  if (it==l.end())
+    throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
+                            ": std::multimap<>::operator>>,"
+                            " multimap is empty");
+  o = *it;
+  l.erase(it);
+  return l;
+}
+#endif
 
 //@}
 //@}

src/mrw/multiset.hxx

@@ -27,6 +27,7 @@
 #define __MRW__MULTISET__HPP__
 
 #include <set>
+#include <mrw/checkcxx11.hxx>
 #include <mrw/exception.hxx>
 #include <mrw/string.hxx>
 
@@ -48,11 +49,21 @@
     @param o a value to be inserted into multiset @c l
     @pre \#include <mrw/multiset.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename T, class C, typename A>
-std::multiset<T, C, A>& operator<<(std::multiset<T, C, A>& l, const T& o) throw(std::bad_exception) {
+    std::multiset<T, C, A> operator<<(std::multiset<T, C, A> l, const T& o)
+    throw(std::bad_exception) {
   l.insert(o);
   return l;
 }
+#else
+template <typename T, class C, typename A>
+    std::multiset<T, C, A>&& operator<<(std::multiset<T, C, A>&& l, const T& o)
+    throw(std::bad_exception) {
+  l.insert(o);
+  return l;
+}
+#endif
 
 /** @brief extract the first value of a multiset
 
@@ -72,17 +83,33 @@ std::multiset<T, C, A>& operator<<(std::multiset<T, C, A>& l, const T& o) throw(
     shortened by the shifted element
     @pre \#include <mrw/multiset.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename T, class C, typename A>
-std::multiset<T, C, A>& operator>>(std::multiset<T, C, A>& l, T& o) throw(std::exception) {
+    std::multiset<T, C, A> operator>>(std::multiset<T, C, A> l, T& o)
+    throw(std::exception) {
   typename std::multiset<T, C, A>::iterator it(l.begin());
   if (it==l.end())
     throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
-                            ": std::multiset<>& operator>>(std::multiset<>&, T&),"
+                            ": std::multiset<> operator>>,"
                             " multiset is empty");
   o = *it;
   l.erase(it);
   return l;
 }
+#else
+template <typename T, class C, typename A>
+    std::multiset<T, C, A>&& operator>>(std::multiset<T, C, A>&& l, T& o)
+    throw(std::exception) {
+  typename std::multiset<T, C, A>::iterator it(l.begin());
+  if (it==l.end())
+    throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
+                            ": std::multiset<> operator>>,"
+                            " multiset is empty");
+  o = *it;
+  l.erase(it);
+  return l;
+}
+#endif
 
 //@}
 //@}

src/mrw/set.hxx

@@ -27,6 +27,7 @@
 #define __MRW__SET__HPP__
 
 #include <set>
+#include <mrw/checkcxx11.hxx>
 #include <mrw/exception.hxx>
 #include <mrw/string.hxx>
 
@@ -49,16 +50,27 @@
     @param o a value to be inserted into set @c l
     @pre \#include <mrw/set.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename T, class C, typename A>
-std::set<T, C, A>& operator<<(std::set<T, C, A>& l, const T& o)
+    std::set<T, C, A> operator<<(std::set<T, C, A> l, const T& o)
     throw(std::exception) {
   if (!l.insert(o).second)
     throw mrw::invalid_argument(std::string(__FILE__ ":")+__LINE__+
-                                ": std::set<>&"
+                                ": std::set<>::operator<<, "
-                                " operator<<(std::set<>&, const T&),"
                                 "set element already exists");
   return l;
 }
+#else
+template <typename T, class C, typename A>
+    std::set<T, C, A>&& operator<<(std::set<T, C, A>&& l, const T& o)
+    throw(std::exception) {
+  if (!l.insert(o).second)
+    throw mrw::invalid_argument(std::string(__FILE__ ":")+__LINE__+
+                                ": std::set<> operator<<, "
+                                "set element already exists");
+  return l;
+}
+#endif
 
 /** @brief extract the first value of a set
 
@@ -78,18 +90,33 @@ std::set<T, C, A>& operator<<(std::set<T, C, A>& l, const T& o)
     shortened by the shifted element
     @pre \#include <mrw/set.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename T, class C, typename A>
-std::set<T, C, A>& operator>>(std::set<T, C, A>& l, T& o)
+    std::set<T, C, A> operator>>(std::set<T, C, A> l, T& o)
     throw(std::exception) {
   typename std::set<T, C, A>::iterator it(l.begin());
   if (it==l.end())
     throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
-                            ": std::set<>& operator>>(std::set<>&, T&),"
+                            ": std::set<> operator>>,"
                             " set is empty");
   o = *it;
   l.erase(it);
   return l;
 }
+#else
+template <typename T, class C, typename A>
+    std::set<T, C, A> operator>>(std::set<T, C, A> l, T& o)
+    throw(std::exception) {
+  typename std::set<T, C, A>::iterator it(l.begin());
+  if (it==l.end())
+    throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
+                            ": std::set<> operator>>,"
+                            " set is empty");
+  o = *it;
+  l.erase(it);
+  return l;
+}
+#endif
 
 //@}
 //@}

src/mrw/vector.hxx

@@ -27,6 +27,7 @@
 #define __MRW__VECTOR__HPP__
 
 #include <vector>
+#include <mrw/checkcxx11.hxx>
 #include <mrw/exception.hxx>
 #include <mrw/string.hxx>
 
@@ -48,11 +49,21 @@
     @param o a value to be inserted into vector @c l
     @pre \#include <mrw/vector.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename T, typename A>
-std::vector<T, A>& operator<<(std::vector<T, A>& l, const T& o) throw(std::bad_exception) {
+    std::vector<T, A> operator<<(std::vector<T, A> l, const T& o)
+    throw(std::bad_exception) {
   l.push_back(o);
   return l;
 }
+#else
+template <typename T, typename A>
+    std::vector<T, A>&& operator<<(std::vector<T, A>&& l, const T& o)
+    throw(std::bad_exception) {
+  l.push_back(o);
+  return l;
+}
+#endif
 
 /** @brief extract the first value of a vector
 
@@ -72,8 +83,10 @@ std::vector<T, A>& operator<<(std::vector<T, A>& l, const T& o) throw(std::bad_e
     shortened by the shifted element
     @pre \#include <mrw/vector.hxx>
 */
+#ifdef MRW__OLD_PRE11_COMPILER
 template <typename T, typename A>
-std::vector<T, A>& operator>>(std::vector<T, A>& l, T& o) throw(std::exception) {
+std::vector<T, A> operator>>(std::vector<T, A> l, T& o)
+    throw(std::exception) {
   typename std::vector<T, A>::iterator it(l.begin());
   if (it==l.end())
     throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
@@ -83,7 +96,20 @@ std::vector<T, A>& operator>>(std::vector<T, A>& l, T& o) throw(std::exception)
   l.erase(it);
   return l;
 }
-
+#else
+template <typename T, typename A>
+std::vector<T, A>&& operator>>(std::vector<T, A>&& l, T& o)
+    throw(std::exception) {
+  typename std::vector<T, A>::iterator it(l.begin());
+  if (it==l.end())
+    throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
+                            ": std::vector<>& operator>>(std::vector<>&, T&),"
+                            " vector is empty");
+  o = *it;
+  l.erase(it);
+  return l;
+}
+#endif
 //@}
 //@}