import { type CheckedExpr, type Type } from "../gen/cel/expr/checked_pb.js";
import type { Expr } from "../gen/cel/expr/syntax_pb.ts";
import type { Message } from "@bufbuild/protobuf";
/**
 * Returns adorned debug output for the given expression tree, following cel-go.
 *
 * @private Caution: This functions requires ES2024 features.
 */
export declare function toDebugString(expr: Expr, adorner?: Adorner): string;
export interface Adorner {
    GetMetadata(context: Message): string;
}
export declare class KindAdorner implements Adorner {
    static readonly singleton: KindAdorner;
    private constructor();
    GetMetadata(context: Message): string;
}
export declare class SemanticAdorner implements Adorner {
    private readonly checked;
    constructor(checked: CheckedExpr);
    GetMetadata(elem: Message): string;
}
export declare function formatCELType(t: Type | undefined): string;