{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"if"}]}
            if a_type.is_signed(self) != b_type.is_signed(self) {
            // TODO(antoyo): cast to unsigned to do a logical shift if that does not work.
                let b = self.context.new_cast(self.location, b, a_type);