Reliable after-change-functions (via: Using incremental parsing in Emacs)

[Yuan Fu]

A related question: is there a reliable way to be notified when buffer text 
changes? Because AFAICT both tree-sitter and LSP needs to know incremental 
changes. Both LSP packages (lsp-mode and eaglet) add hooks to 
after-change-function. But their hook is not guaranteed to run because of 
inhibit-modification-hooks. Undo seems to always know the exact change, but it 
doesn’t seem to have a hook avaliable.

Yuan