syntax_data: {"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:             for (hir, ty) in hir_sig.inputs.iter().zip(ty_sig.inputs().iter()) {
context_before:             try_visit!(visitor.visit(hir_sig.output.span(), ty_sig.output()));
context_after:                 try_visit!(visitor.visit(hir.span, ty.map_bound(|x| *x)));