multi-cursors in an editable grep result over files limited to the current project. Modify, save, and all relevant files are updated.
Never seen this level of integration of features in any of the other editors I have tried during my 25 years of using emacs.
usually the compiler can help here, as it knows what was needed in the code and where the definition came from, including macros. Not sure there is an open-source tol for that though, if clang-tidy does not do it.
as it was said elsewhere, when there are several configurations at play, one needs to be careful.