export type { JsonObject as Object, JsonArray as Array };
/**
 * JSON data types, as returned by `JSON.parse()`.
 *
 * @category Utilities: JSON
 */
export type Value = null | boolean | number | string | JsonObject | JsonArray;
/**
 * JSON object values.
 *
 * @category Utilities: JSON
 */
interface JsonObject extends Record<string, Value> {
}
/**
 * JSON array values.
 *
 * @category Utilities: JSON
 */
interface JsonArray extends Array<Value> {
}
/**
 * Tests a JSON value to see if it is `null`.
 *
 * @param x - JSON Value
 * @returns true if null; false otherwise
 *
 * @category Utilities: JSON
 */
export declare function isNull(x: Value): x is null;
/**
 * Cast a JSON value to `null`, throwing a `JsonError` if the cast fails.
 *
 * @param x - JSON value to cast
 * @param prefix - optional error message prefix
 * @returns null
 * @throws {@link JsonError} if the cast fails
 *
 * @category Utilities: JSON
 */
export declare function asNull(x: Value, prefix?: string): null;
/**
 * Tests a JSON value to see if it is a boolean.
 *
 * @param x - JSON Value
 * @returns true if null; false otherwise
 *
 * @category Utilities: JSON
 */
export declare function isJsonBoolean(x: Value): x is boolean;
/**
 * Cast a JSON value to `boolean`, throwing a `JsonError` if the cast fails.
 *
 * @param x - JSON value to cast
 * @param prefix - optional error message prefix
 * @returns boolean
 * @throws {@link JsonError} if the cast fails
 *
 * @category Utilities: JSON
 */
export declare function asBoolean(x: Value, prefix?: string): boolean;
/**
 * Tests a JSON value to see if it is a number.
 *
 * @param x - JSON Value
 * @returns true if null; false otherwise
 *
 * @category Utilities: JSON
 */
export declare function isJsonNumber(x: Value): x is number;
/**
 * Cast a JSON value to `number`, throwing a `JsonError` if the cast fails.
 *
 * @param x - JSON value to cast
 * @param prefix - optional error message prefix
 * @returns number
 * @throws {@link JsonError} if the cast fails
 *
 * @category Utilities: JSON
 */
export declare function asNumber(x: Value, prefix?: string): number;
/**
 * Tests a JSON value to see if it is a string.
 *
 * @param x - JSON Value
 * @returns true if null; false otherwise
 *
 * @category Utilities: JSON
 */
export declare function isJsonString(x: Value): x is string;
/**
 * Cast a JSON value to `string`, throwing a `JsonError` if the cast fails.
 *
 * @param x - JSON value to cast
 * @param prefix - optional error message prefix
 * @returns string
 * @throws {@link JsonError} if the cast fails
 *
 * @category Utilities: JSON
 */
export declare function asString(x: Value, prefix?: string): string;
/**
 * Tests a JSON value to see if it is a JSON object.
 *
 * @param x - JSON Value
 * @returns true if null; false otherwise
 *
 * @category Utilities: JSON
 */
export declare function isJsonObject(x: Value): x is JsonObject;
/**
 * Cast a JSON value to `Object`, throwing a `JsonError` if the cast fails.
 *
 * @param x - JSON value to cast
 * @param prefix - optional error message prefix
 * @returns JsonObject
 * @throws {@link JsonError} if the cast fails
 *
 * @category Utilities: JSON
 */
export declare function asObject(x: Value, prefix?: string): JsonObject;
/**
 * Tests a JSON value to see if it is a JSON array.
 *
 * @param x - JSON Value
 * @returns true if array; false otherwise
 *
 * @category Utilities: JSON
 */
export declare function isJsonArray(x: Value): x is JsonArray;
/**
 * Cast a JSON value to `Array`, throwing a `JsonError` if the cast fails.
 *
 * @param x - JSON value to cast
 * @param prefix - optional error message prefix
 * @returns JsonArray
 * @throws {@link JsonError} if the cast fails
 *
 * @category Utilities: JSON
 */
export declare function asArray(x: Value, prefix?: string): JsonArray;
/**
 * A more safely typed version of `JSON.parse()`.
 *
 * @param source - JSON string value to parse
 * @returns parsed JSON Value
 *
 * @category Utilities: JSON
 */
export declare function safeParse(source: string): Value;
/**
 * A more safely typed version of `JSON.stringify()`.
 *
 * @param value - JSON value to stringify
 * @returns stringified JSON value
 *
 * @category Utilities: JSON
 */
export declare function safeStringify(value: Value): string;
/**
 * Tests a JSON value to determine if it contains data.
 *
 * @remarks
 * The FHIR specification provides requirements on how to represent FHIR data in JSON.
 * These requirements are stricter than the JSON specifications. For our purposes, the
 * following requirements must guide our implementations for how JSON values are handled:
 * - Objects are never empty (implies arrays are also never empty). If an element is
 *   present in the resource, it SHALL have properties as defined for its type, or 1 or
 *   more extensions.
 * - String property values can never be empty. Either the property is absent, or it is
 *   present with at least one character of content.
 * - The FHIR types `integer`, `unsignedInt`, `positiveInt` and `decimal` are represented
 *   as a JSON number, the FHIR type `boolean` as a JSON boolean, and all other types
 *   (including `integer64`) are represented as a JSON string which has the same content
 *   as that specified for the relevant datatype. Whitespace is always significant
 *   (i.e., no leading and trailing spaces for non-strings).
 *
 * @param x - JSON Value
 * @returns true if argument has actual data; false otherwise
 *
 * @see [JSON Representation of Resources](https://hl7.org/fhir/json.html)
 * @category Utilities: JSON
 */
export declare function hasFhirData(x: Value | undefined): boolean;
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