/**
 * The Standard Schema interface.
 */
export interface StandardSchemaV1<Input = unknown, Output = Input> {
    /**
     * The Standard Schema properties.
     */
    readonly '~standard': StandardSchemaV1.Props<Input, Output>;
}
export declare namespace StandardSchemaV1 {
    /**
     * The Standard Schema properties interface.
     */
    export interface Props<Input = unknown, Output = Input> {
        /**
         * The version number of the standard.
         */
        readonly version: 1;
        /**
         * The vendor name of the schema library.
         */
        readonly vendor: string;
        /**
         * Validates unknown input values.
         */
        readonly validate: (value: unknown) => Result<Output> | Promise<Result<Output>>;
        /**
         * Inferred types associated with the schema.
         */
        readonly types?: Types<Input, Output> | undefined;
    }
    /**
     * The result interface of the validate function.
     */
    export type Result<Output> = SuccessResult<Output> | FailureResult;
    /**
     * The result interface if validation succeeds.
     */
    export interface SuccessResult<Output> {
        /**
         * The typed output value.
         */
        readonly value: Output;
        /**
         * The non-existent issues.
         */
        readonly issues?: undefined;
    }
    /**
     * The result interface if validation fails.
     */
    export interface FailureResult {
        /**
         * The issues of failed validation.
         */
        readonly issues: ReadonlyArray<Issue>;
    }
    /**
     * The issue interface of the failure output.
     */
    export interface Issue {
        /**
         * The error message of the issue.
         */
        readonly message: string;
        /**
         * The path of the issue, if any.
         */
        readonly path?: ReadonlyArray<PropertyKey | PathSegment> | undefined;
    }
    /**
     * The path segment interface of the issue.
     */
    export interface PathSegment {
        /**
         * The key representing a path segment.
         */
        readonly key: PropertyKey;
    }
    /**
     * The Standard Schema types interface.
     */
    export interface Types<Input = unknown, Output = Input> {
        /**
         * The input type of the schema.
         */
        readonly input: Input;
        /**
         * The output type of the schema.
         */
        readonly output: Output;
    }
    /**
     * Infers the input type of a Standard Schema.
     */
    export type InferInput<Schema extends StandardSchemaV1> = NonNullable<Schema['~standard']['types']>['input'];
    /**
     * Infers the output type of a Standard Schema.
     */
    export type InferOutput<Schema extends StandardSchemaV1> = NonNullable<Schema['~standard']['types']>['output'];
    export {};
}