File: pro-bounds-constant-array-index.rst

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.. title:: clang-tidy - cppcoreguidelines-pro-bounds-constant-array-index

cppcoreguidelines-pro-bounds-constant-array-index
=================================================

This check flags all array subscript expressions on static arrays and
``std::arrays`` that either do not have a constant integer expression index or
are out of bounds (for ``std::array``). For out-of-bounds checking of static
arrays, see the `-Warray-bounds` Clang diagnostic.

This rule is part of the `Bounds safety (Bounds 2)
<https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Pro-bounds-arrayindex>`_
profile from the C++ Core Guidelines.

Optionally, this check can generate fixes using ``gsl::at`` for indexing.

Options
-------

.. option:: GslHeader

   The check can generate fixes after this option has been set to the name of
   the include file that contains ``gsl::at()``, e.g. `"gsl/gsl.h"`.

.. option:: IncludeStyle

   A string specifying which include-style is used, `llvm` or `google`. Default
   is `llvm`.