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.. title:: clang-tidy - misc-sizeof-container
misc-sizeof-container
=====================
The check finds usages of ``sizeof`` on expressions of STL container types. Most
likely the user wanted to use ``.size()`` instead.
All class/struct types declared in namespace ``std::`` having a const ``size()``
method are considered containers, with the exception of ``std::bitset`` and
``std::array``.
Examples:
.. code-block:: c++
std::string s;
int a = 47 + sizeof(s); // warning: sizeof() doesn't return the size of the container. Did you mean .size()?
int b = sizeof(std::string); // no warning, probably intended.
std::string array_of_strings[10];
int c = sizeof(array_of_strings) / sizeof(array_of_strings[0]); // no warning, definitely intended.
std::array<int, 3> std_array;
int d = sizeof(std_array); // no warning, probably intended.
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