std::array is funny. It is defined basically like this: template<typename T, int size> struct std::array { T a[size]; }; It is a struct which contains an array. It does not have a constructor that takes an initializer list. But std::array is an aggregate by the rules of C++11, and therefore it can be created by … Read more
On Linux: In general, all commonly available linux distributions will use libstdc++ by default, and all modern versions of GCC come with a libstdc++ that supports C++11. If you want to compile c++11 code here, use one of: g++ -std=c++11 input.cxx -o a.out (usually GNU compiler) g++ -std=gnu++11 input.cxx -o a.out On OS X before … Read more
That blog post is pretty inaccurate. As far as I know C++ ABI changes have been introduced with every major release of GCC (i.e. those with different first or second version number components). Not true. The only C++ ABI changes introduced since GCC 3.4 have been backward-compatible, meaning the C++ ABI has been stable for … Read more
I’m compiling gcc 4.6 from source, and apparently sudo make install didn’t catch this one. I dug around and found gcc/trunk/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6.0.15 I copied it in to /usr/lib and redirected libstdc++.so.6 to point to the new one, and now everything works.
Threads copy their arguments (think about it, that’s The Right Thing). If you want a reference explicitly, you have to wrap it with std::ref (or std::cref for constant references): std::thread t(foo, std::ref(std::cout)); (The reference wrapper is a wrapper with value semantics around a reference. That is, you can copy the wrapper, and all copies will … Read more
Locked. Comments on this answer have been disabled, but it is still accepting other interactions. Learn more. <regex> was implemented and released in GCC 4.9.0. In your (older) version of GCC, it is not implemented. That prototype <regex> code was added when all of GCC’s C++0x support was highly experimental, tracking early C++0x drafts and … Read more