syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"(ty::ConstKind::Value(a_val),"}]}
source_snippet:         (ty::ConstKind::Value(a_val), ty::ConstKind::Value(b_val)) => {
context_before:         (ty::ConstKind::Placeholder(p1), ty::ConstKind::Placeholder(p2)) => p1 == p2,
context_after:             a_val.valtree() == b_val.valtree()