syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"ExprKind::Assign"}]}
source_snippet:             ExprKind::Assign { .. } | ExprKind::AssignOp { .. } => {
context_before:             }
context_after:                 block = this.stmt_expr(block, expr_id, None).into_block();