12.4 Beta, Error: Could not find a match for std::_Tuple_impl 0, std::string && ::_Tuple_impl(std::tuple std::string &&

Question

Hi,
would you guys say code that compiles fine without -std=c++11 should also compile *with* -std=c++11?
raider@sol112_x86:/tmp $ CC -V
CC: Sun C++ 5.13 SunOS_i386 Beta2 2014/06/17
raider@sol112_x86:/tmp $ CC buggy.cc  
raider@sol112_x86:/tmp $ CC -std=c++11 buggy.cc         
Error: Could not find a match for std::_Tuple_impl<0, std::string &&>::_Tuple_impl(std::tuple<std::string &&>, std::string ) needed in std::tuple<std::string &&>::tuple<std::string, void>(std::string &&).
"/opt/SolarisStudio12.4-beta_jul14-solaris-x86/lib/compilers/CC-gcc/include/c++/4.8.2/tuple", line 868:     Where: While instantiating "std::tuple<std::string &&>::tuple<std::string, void>(std::string &&)".
"/opt/SolarisStudio12.4-beta_jul14-solaris-x86/lib/compilers/CC-gcc/include/c++/4.8.2/tuple", line 868:     Where: Instantiated from std::forward_as_tuple<std::string>(std::string &&).
"/opt/SolarisStudio12.4-beta_jul14-solaris-x86/lib/compilers/CC-gcc/include/c++/4.8.2/bits/stl_map.h", line 485:     Where: Instantiated from non-template code.
1 Error(s) detected.
raider@sol112_x86:/tmp $ cat buggy.cc
#include <map>
#include <string>
typedef std::map<std::string, std::string> StrStrMap;
int main(void)
    StrStrMap dict;
    dict["bug"] = "feature";
    return 0;

Answer 1

C++11 is approximately a superset of C++03. If you write in the common subset, the code will compile in any mode. For example, a basic hello-world program
#include <iostream>
int main() { std::cout << "Hello, world!\n"; }
will compile and run as C++98/03, as C++11, as C++14, and I'm sure will also work with the next standard, planned for 2017.
But if you use syntax or library types and functions that are new in C++11, the code will not compile as C++03.
In my previous post, I might have sounded too negative about compiling C++03 code in C++11 mode. If you have a C++03 program that is intended to be portable, and that works with different compilers on different platforms, chances are good that it will continue to work in C++11. The chances are very good that only minor modifications will be needed.