syntax_data: {"ast_node_type":"other","tokens":[{"end":17,"kind":"keyword","start":0,"text":"{"}]}
source_snippet:                 {
context_before:                 }) = self.tcx.parent_hir_node(hir_expr.hir_id)
context_after:                     // Use the whole span of the `x as T` expression for the coercion.