syntax_data: {"ast_node_type":"variable","tokens":[{"end":47,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // Generate let tmp0 = arg0
context_before:                 if let ExprKind::Deref { arg } = expr.kind {
context_after:                     let operand = unpack!(block = this.as_temp(block, scope, arg, Mutability::Mut));