| .. title:: clang-tidy - cppcoreguidelines-pro-type-union-access |
| |
| cppcoreguidelines-pro-type-union-access |
| ======================================= |
| |
| This check flags all access to members of unions. Passing unions as a whole is |
| not flagged. |
| |
| Reading from a union member assumes that member was the last one written, and |
| writing to a union member assumes another member with a nontrivial destructor |
| had its destructor called. This is fragile because it cannot generally be |
| enforced to be safe in the language and so relies on programmer discipline to |
| get it right. |
| |
| This rule is part of the "Type safety" profile of the C++ Core Guidelines, see |
| https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#Pro-type-unions. |
