import type { ConfigurationOptions } from "./configuration.ts";
import type { PrimativeOptions } from "./specifications.ts";
/**
 * @ignore
 *
 * A matched value of a configuration value and the source it came from
 */
export type ConfigurationResult = {
    source: "argument";
    value: unknown;
} | {
    source: "variable";
    value: unknown;
} | {
    source: "current";
    value: unknown;
} | {
    source: "fallback";
    value: unknown;
};
/**
 * Parse a JavaScript primative like a string, number or boolean,
 * applying the precedence of argument > variable > file > fallback
 */
export declare function _parsePrimative<T>(config: ConfigurationOptions, options: PrimativeOptions<T>, currentValue: unknown): ConfigurationResult;
/**
 * Parse a floating-point number from a configuration result,
 * attempting to coerce string values.
 */
export declare function _parseFloat(result: ConfigurationResult): number;
/**
 * Parse a boolean from a configuration result, coercing common string values
 */
export declare function _parseBoolean(result: ConfigurationResult): boolean;
/**
 * Parse a URL from a configuration result and create a `URL` from it
 */
export declare function _parseURL(result: ConfigurationResult): URL;
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