syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"!impl_generics.const_param(pc,"}]}
source_snippet:                             !impl_generics.const_param(pc, self).pure_wrt_drop
context_before:                         ty::ConstKind::Param(pc) => {
context_after:                         }