This isn't an issue with existing modes, since they typically already include font-lock highlighting, but while writing my own mode backed by tree-sitter, I found that it was necessary to set font-lock-defaults to a dummy value (I eventually landed on '(('t))) for tree-sitter-hl-mode to perform highlighting.
Ideally, if font-lock-defaults was unset, tree-sitter-hl-mode could just set this value when enabled.
This isn't an issue with existing modes, since they typically already include font-lock highlighting, but while writing my own mode backed by tree-sitter, I found that it was necessary to set
font-lock-defaultsto a dummy value (I eventually landed on'(('t))) for tree-sitter-hl-mode to perform highlighting.Ideally, if
font-lock-defaultswas unset, tree-sitter-hl-mode could just set this value when enabled.