/**
 * @license
 * Copyright 2021 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
import type { TemplateLike } from './types.js';
export interface StrResult {
    strTag: true;
    strings: TemplateStringsArray;
    values: unknown[];
}
/**
 * Tag that allows expressions to be used in localized non-HTML template
 * strings.
 *
 * Example: msg(str`Hello ${this.user}!`);
 *
 * The Lit html tag can also be used for this purpose, but HTML will need to be
 * escaped, and there is a small overhead for HTML parsing.
 *
 * Untagged template strings with expressions aren't supported by lit-localize
 * because they don't allow for values to be captured at runtime.
 */
declare const _str: (strings: TemplateStringsArray, ...values: unknown[]) => StrResult;
export declare const str: typeof _str & {
    _LIT_LOCALIZE_STR_?: never;
};
export declare const isStrTagged: (val: TemplateLike) => val is StrResult;
/**
 * Render the result of a `str` tagged template to a string. Note we don't need
 * to do this for Lit templates, since Lit itself handles rendering.
 */
export declare const joinStringsAndValues: (strings: TemplateStringsArray, values: Readonly<unknown[]>, valueOrder?: number[]) => string;
export {};
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