C++11 and LibreOffice Michael Stahl

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Presentation transcript:

C++11 and LibreOffice Michael Stahl 2015-01-31 The future has arrived (it was about time) Michael Stahl 2015-01-31

C++98 First ISO C++ standard Poorly implemented for many years It has too many features But it lacks features ISO/IEC 14882:1998 ISO/IEC 14882:2003

C++11 Major revision of ISO C++ standard “C++11 feels like a new language” (Stroustrup) Commercially available compilers actually implement it GCC Clang MSVC C++14 “bugfix release” ISO/IEC 14882:2011

… and LibreOffice? Rewrite in Haskell Rust didn't happen yet If we're stuck with C++, then at least give us modern C++

Inspiration from other projects... LLVM is switching to C++11 Minimum requirements: Clang 3.1 GCC 4.7 MSVC 2012 Offers a good subset of C++11, bringing both core and library improvements

LibreOffice 4.3, C++98 Platform Min requirement TDF release Min OS target Windows MSVC 2010 MSVC 2012 Windows XP Linux GCC 4.1 Clang 2.? GCC 4.4 RHEL 5 Mac OS X Mac OS X SDK 10.6 Apple GCC 4.2 XCode 3.2 (Mac OS X SDK 10.6) Mac OS X 10.6 32bit (libstdc++)

LibreOffice 4.4 requires (some) C++11 Platform Min requirement TDF release Min OS target Windows MSVC 2012 Windows XP Linux GCC 4.7 4.6 Clang 3.1 GCC 4.8 (DTS, no bundling libstdc++) RHEL 5 Mac OS X Mac OS X SDK 10.8 Apple Clang 6.0 (Mac OS X SDK 10.8) Mac OS X 10.8 64bit (libc++) Mac OS X 10.7 would have been sufficient for C++11, but...

LibreOffice 4.5 will require even more C++11 Platform Min requirement TDF release Min OS target Windows MSVC 2013 Windows XP Linux GCC 4.7 4.6 Clang 3.1 GCC 4.8 (DTS, no bundling libstdc++) RHEL 5 ? Mac OS X Mac OS X SDK 10.8 Apple Clang 6.0 (Mac OS X SDK 10.8) Mac OS X 10.8 64bit (libc++)

dropping MSVC 2012 for 2013: new features Variadic templates Initializer lists Default template arguments for function templates Explicit conversion operators Raw string literals Defaulted and deleted functions http://msdn.microsoft.com/en-us/library/hh567368.aspx http://msdn.microsoft.com/en-us/library/hh567368.aspx

…and dropping GCC 4.6 for 4.7 would allow... Non-static data member initializers Alias templates Delegating constructors https://gcc.gnu.org/projects/cxx0x.html (For completeness, clang's status) http://clang.llvm.org/cxx_status.html https://gcc.gnu.org/projects/cxx0x.html http://clang.llvm.org/cxx_status.html

Fin. Thanks for your attention