import { InjectionToken } from '@angular/core';
/**
 * Describes a {@link RegExp} that matches and discovers context property names from a string. The
 * expression should bind the reference to the first captured group. It will always be executed
 * with a global `g` flag.
 *
 * @remarks See {@link STRING_INTERPOLATION_SCHEME} summary for more information
 */
export declare type StringInterpolationScheme = RegExp;
/**
 * The {@link StringInterpolationScheme} used during the {@link StringInterpolator.interpolate}
 * operation. By default this regular expression will match any common unix environment variable
 * notation styled values in the form of `$parameter` while capturing the actual "context" property
 * name `parameter` inside the first expression group
 */
export declare const STRING_INTERPOLATION_SCHEME: InjectionToken<RegExp>;
/** The {@link StringInterpolationReplaceFn} used during string interpolation operations */
export declare type StringInterpolationReplaceFn = (params: any, match: string, ...groups: string[]) => string;
/**
 * The {@link StringInterpolationReplaceFn} used during the {@link StringInterpolator.interpolate}
 * operation. By default the replacer will exchange
 */
export declare const STRING_INTERPOLATION_REPLACER: InjectionToken<StringInterpolationReplaceFn>;
export declare class StringInterpolator {
    readonly interpolationScheme: StringInterpolationScheme;
    protected readonly replacer: StringInterpolationReplaceFn;
    constructor(interpolationScheme: StringInterpolationScheme, replacer: StringInterpolationReplaceFn);
    /**
     * Interpolates a given string value with any given context object. This
     * operation uses the provided {@link STRING_INTERPOLATION_SCHEME} expression to
     * properly discover and replace target values as desired
     *
     * @param value    The string value that should be interpolated
     * @param params   The context to use for the interpolation resolution
     * @param scheme   Optional {@link StringInterpolationScheme} to use for the interpolation
     * @param replacer Optional {@link StringInterpolationReplaceFn} to use for the interpolation
     */
    interpolate(value: string, params: any, scheme?: RegExp, replacer?: StringInterpolationReplaceFn): string;
}