syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// If an operand copies `_c`, it must happen before the assignment `_d = _c`, otherwise it is UB.
context_before: ///
context_after: /// This means that replacing it by a copy of `_a` if ok, since this copy happens before `_c` is