Refactor within a namespace
The symbol highlight transient state and iedit tools can be used to make concurrent changes to multiple instances of the same piece of text, eg. a function name, a local let binding name, a def name, etc.
You can also use / to search for matched to particular text pattern
Changes a symbol or name
* or # to open symbol highlight transient state on the current text under the cursor. This highlights all instances of that text in the namespace.
e starts iedit state, turning the cursor red.
Make the changes to the highlighted text and all instances of that text will change. You can use Normal and Insert mode editing commands within iedit.
ESC or fd to leave iedit mode (from Evil normal mode, so if you are in Insert mode you will need to do this twice).
Add video
Changes any text using search
/ to open the buffer search and type in the text pattern you are looking to find.
RET to confirm you have finished entering the text pattern (hopefully you found what you are looking for).
SPC s e starts iedit state, turning the cursor red.
Make the changes to the highlighted text and all instances of that text will change. You can use Normal and Insert mode editing commands within iedit.
ESC or fd to leave iedit mode (from Evil normal mode, so if you are in Insert mode you will need to do this twice).
Add video
Edit just a function or text region
Use narrowing before selecting / searching to be more selective in what text is show and therefore highlighted and changed. E.g. if you just want to change a specific function.
Alternatives - multiple cursors
work in progress, sorry
Any feedback on using multiple cursors is most welcome.