Well, jump to definition isn't exactly complicated?
And you can use whatever interface the language servers already use to expose that functionality to eg vscode?
And you can use whatever interface the language servers already use to expose that functionality to eg vscode?
With grep it's easy: Always shows everything that matches.
With grep you get lots of false positives, and for some languages you need a lot of extra rules to know what to grep for. (Eg in Python you might read `+` in the caller, but you actually need to grep for __add__ to find the definition.)