Unused nodes

[dtolnay]

These two nodes are currently unused by any other nodes; there might be others:

ungrammar/rust.ungram

Lines 68 to 73 in 07d5806

	MacroItems =
	Item*
	MacroStmts =
	statements:Stmt*
	Expr?

Are these needed as intermediate data structures in your parser without being present in the syntax tree, or can they be removed from the ungrammar?

[matklad]

These are alternative top-level nodes for macro expansion. Ie, top-level macro expands to MacroItems nodes.

They are somewhat of an implementation detail of rust-analyzer at the moment, maybe we can/should unify them with file/block contents nodes.

In other words, we probably need to change something around here, but to figure out what exactly, we need to carefully review macro expansion needs.

[Veykril]

Closing as the grammar file is no longer maintained