| .. title:: clang-tidy - performance-for-range-copy |
| |
| performance-for-range-copy |
| ========================== |
| |
| Finds C++11 for ranges where the loop variable is copied in each iteration but |
| it would suffice to obtain it by const reference. |
| |
| The check is only applied to loop variables of types that are expensive to copy |
| which means they are not trivially copyable or have a non-trivial copy |
| constructor or destructor. |
| |
| To ensure that it is safe to replace the copy with a const reference the |
| following heuristic is employed: |
| |
| 1. The loop variable is const qualified. |
| 2. The loop variable is not const, but only const methods or operators are |
| invoked on it, or it is used as const reference or value argument in |
| constructors or function calls. |
| |
| Options |
| ------- |
| |
| .. option:: WarnOnAllAutoCopies |
| |
| When non-zero, warns on any use of `auto` as the type of the range-based for |
| loop variable. Default is `0`. |
