Re: Tree-sitter api

[Yuan Fu]

Currently, because font-lock.el uses functions and variables defined in 
tree-sitter.el, it needs to require tree-sitter.el. Should we require 
tree-sitter.el by default? Then what do we do when tree-sitter is not available 
on the system? Should I wrap every reference to tree-sitter in font-lock.el 
with (when (featurep ’tree-sitter))? Or is there better ways to deal with this?

Another approach is to define everything tree-sitter related in tree-sitter.el, 
and make tree-sitter.el require font-lock.el instead of the other way around. 
Would that be better?

Yuan