syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"4"}]}
source_snippet:                         4 => fn_abi.ret.cast_to(Reg::f32()),
context_before:                     match fn_abi.ret.layout.size.bytes() {
context_after:                         8 => fn_abi.ret.cast_to(Reg::f64()),