syntax_data: {"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"ty::Float(FloatTy::F128)"}]}
source_snippet:             ty::Float(FloatTy::F128) => "C4f128",
context_before:             ty::Float(FloatTy::F64) => "d",
context_after:             ty::Never => "z",