syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"ty::TyVar(_)"}]}
source_snippet:                 ty::TyVar(_) => false,
context_before:             ty::Infer(infer) => match infer {
context_after:                 ty::IntVar(_) | ty::FloatVar(_) => true,