syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if self.infcx.tcx.features().generic_const_exprs() {
context_before:     ) -> Result<ty::Const<'tcx>, Vec<E>> {
context_after:             return Ok(super::evaluate_const(&self.infcx, ct, self.param_env));