[clangd] Expose SelectionTree to code tweaks, and use it for swap if branches.
Summary:
This reduces the per-check implementation burden and redundant work.
It also makes checks range-aware by default (treating the commonAncestor
as if it were a point selection should be good baseline behavior).
Reviewers: ilya-biryukov
Subscribers: ioeric, MaskRay, jkorous, arphaman, kadircet
Tags: #clang
Differential Revision: https://reviews.llvm.org/D57570
git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@352876 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed
