syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if self.typeck_results.is_coercion_cast(source.hir_id) {
context_before:         // using a coercion (or is a no-op).
context_after:             // Convert the lexpr to a vexpr.