import { DescExtension, DescField, DescMessage } from "./descriptor-set.js";
import { ScalarType } from "./scalar.js";
/**
 * A field wrapper unwraps a message to a primitive value that is more
 * ergonomic for use as a message field.
 */
export interface FieldWrapper<T = any, U = any> {
    /**
     * Wrap a primitive message field value in its corresponding wrapper
     * message. This function is idempotent.
     */
    wrapField(value: U | null | undefined): T;
    /**
     * If the given field uses one of the well-known wrapper types, return
     * the primitive type it wraps.
     */
    unwrapField(value: T): U | null | undefined;
}
/**
 * Wrap a primitive message field value in its corresponding wrapper
 * message. This function is idempotent.
 */
export declare function wrapField<T>(fieldWrapper: FieldWrapper<T> | undefined, value: any): T;
/**
 * Wrap a primitive message field value in its corresponding wrapper
 * message. This function is idempotent.
 */
export declare function unwrapField<T, U = T>(fieldWrapper: FieldWrapper<T> | undefined, value: any): U;
/**
 * If the given field uses one of the well-known wrapper types, return
 * the primitive type it wraps.
 */
export declare function getUnwrappedFieldType(field: DescField | DescExtension): ScalarType | undefined;
/**
 * If the given field uses one of the well-known wrapper types, return
 * the primitive type it wraps.
 */
export declare function getUnwrappedMessageType(msg: DescMessage): ScalarType | undefined;