Editing Programming Language (section)

=File Structure (Ideas)=
* Make 'flat'.
* List of all symbol names.
* Changing the name should result in all uses of the name being updated.
* Use hash for id or index number?
** A name change with a hash would require all call sites to be updated as well.
** Index ID would be easier to update.
** An Index ID would allow name changes without breaking API.
** A hash might be needed for cross API compatibility.
** An ID would be quicker to lookup since it's just an index in an array. A Hash would require a hashmap.
** What about a UUID? It would be unique so cross library boundaries would be ok. No changes on rename. But slowish to look up.
** Index ID's could be put into namespaces. Would allow cross API's to be fine.
** UUID's could remove the need for namespaces.

* How to remap from symbol id to uses...
** Keep a mapping of all the sites that use the symbol?

* Could have a local identifier number, that maps to a global UUID. Could also combine the UUID+specific version. Would let you use different versions of the same function in the program. Could also save space (no 128bit number for every symbol, just a smaller one. But that might make merging problematic.)