syntax_data: {"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"ty::Bool"}]}
source_snippet:             ty::Bool | ty::Char | ty::Str | ty::Int(_) | ty::Uint(_) | ty::Float(_) | ty::Never => {
context_before:             // Basic types, handled above.
context_after:                 unreachable!()