syntax_data: {"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"ty::ConstKind::Placeholder(placeholder_ct)"}]}
source_snippet:                         ty::ConstKind::Placeholder(placeholder_ct) if placeholder_ct == self => {
context_before:                     match placeholder_ct.kind() {
context_after:                             Some(ty)