syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"ty::FloatTy::F32"}]}
source_snippet:                 ty::FloatTy::F32 => Some(sym::f32),
context_before:                 ty::FloatTy::F16 => Some(sym::f16),
context_after:                 ty::FloatTy::F64 => Some(sym::f64),