syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // Convert the lexpr to a vexpr.
context_before:         if self.typeck_results.is_coercion_cast(source.hir_id) {
context_after:             ExprKind::Use { source: self.mirror_expr(source) }