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The existing template would apply the helper operator to *any* template which took two types, regardless of what that template was. The assumption was that those types *must* be STL containers, because no other template takes two types, right? Instead, this new version uses type traits to explicitly whitelist types which the helper applies to. Currently the only type it seems to be used with is std::vector, but by defining more specializations of IsHelpedContainer, other types/templates can be enabled as well. This is particularly important when moving to c++17, since the std::string class would then apparently match the old overload. That makes the << operator ambiguous and breaks the build. Change-Id: Id283746a2ccced8882fa23e6f9e69fe22e206b70 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/45901 Reviewed-by: Gabe Black <gabe.black@gmail.com> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Gabe Black <gabe.black@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
This is the gem5 simulator. The main website can be found at http://www.gem5.org A good starting point is http://www.gem5.org/about, and for more information about building the simulator and getting started please see http://www.gem5.org/documentation and http://www.gem5.org/documentation/learning_gem5/introduction. To build gem5, you will need the following software: g++ or clang, Python (gem5 links in the Python interpreter), SCons, SWIG, zlib, m4, and lastly protobuf if you want trace capture and playback support. Please see http://www.gem5.org/documentation/general_docs/building for more details concerning the minimum versions of the aforementioned tools. Once you have all dependencies resolved, type 'scons build/<ARCH>/gem5.opt' where ARCH is one of ARM, NULL, MIPS, POWER, SPARC, or X86. This will build an optimized version of the gem5 binary (gem5.opt) for the the specified architecture. See http://www.gem5.org/documentation/general_docs/building for more details and options. The basic source release includes these subdirectories: - configs: example simulation configuration scripts - ext: less-common external packages needed to build gem5 - src: source code of the gem5 simulator - system: source for some optional system software for simulated systems - tests: regression tests - util: useful utility programs and files To run full-system simulations, you will need compiled system firmware (console and PALcode for Alpha), kernel binaries and one or more disk images. If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.