syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"ty::FnPtr(sig_tys,"}]}
source_snippet:             ty::FnPtr(sig_tys, _) => self.bound_computation(sig_tys, |computation, sig_tys| {
context_after:                 computation.add_tys(sig_tys.inputs_and_output);