docs/checks/README-qstring-insensitive-allocation.md

0001 # qstring-insensitive-allocation
0002
0003 Finds unneeded memory allocations such as
0004     `if (str.toLower().contains("foo"))` which you should fix as
0005     `if (str.contains("foo", Qt::CaseInsensitive))` to avoid the heap allocation caused by toLower().
0006
0007 Matches any of the following cases:
0008     `str.{toLower, toUpper}().{contains, compare, startsWith, endsWith}()`
0009
0010 #### Pitfalls
0011 `Qt::CaseInsensitive` is different from `QString::toLower()` comparison for a few code points, but it
0012 should be very rare: <http://lists.qt-project.org/pipermail/development/2016-February/024776.html>