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Help/dev: Adopt C++ subset rules in coding guide

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Move the C++ subset rules from the `cmake-developer(7)` into our
dedicated coding guide since they do not need to be in user-facing
documentation.
This commit is contained in:
Brad King
2017-04-19 16:33:28 -04:00
parent 0fd255adf5
commit caabb6e1f3
2 changed files with 21 additions and 24 deletions
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21
Help/dev/source.rst
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@@ -19,3 +19,24 @@ format only a subset of files, such as those that are locally modified.
.. _`clang-format`: http://clang.llvm.org/docs/ClangFormat.html
.. _`.clang-format`: ../../.clang-format
.. _`Utilities/Scripts/clang-format.bash`: ../../Utilities/Scripts/clang-format.bash
C++ Subset Permitted
====================
CMake supports compiling as C++98 in addition to C++11 and C++14.
In order to support building on older toolchains some constructs
need to be handled with care:
* Use ``CM_AUTO_PTR`` instead of ``std::auto_ptr``.
The ``std::auto_ptr`` template is deprecated in C++11. We want to use it
so we can build on C++98 compilers but we do not want to turn off compiler
warnings about deprecated interfaces in general. Use the ``CM_AUTO_PTR``
macro instead.
* Use ``size_t`` instead of ``std::size_t``.
Various implementations have differing implementation of ``size_t``.
When assigning the result of ``.size()`` on a container for example,
the result should be assigned to ``size_t`` not to ``std::size_t``,
``unsigned int`` or similar types.