syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"ty::FloatTy::F16"}]}
source_snippet:                     ty::FloatTy::F16 => v.to_f16().is_nan(),
context_before:                 let is_nan = match flt {
context_after:                     ty::FloatTy::F32 => v.to_f32().is_nan(),