/**
 * @import { Site, Word } from "@helios-lang/compiler-utils"
 */
/**
 * @typedef {{
 *   site: Site
 *   isNamed(): boolean
 *   isOptional(): boolean
 *   eval(scope: Scope): ArgType
 *   toString(): string
 * }} FuncArgTypeExprI
 */
/**
 * @implements {FuncArgTypeExprI}
 */
export class FuncArgTypeExpr implements FuncArgTypeExprI {
    /**
     * @param {Site} site
     * @param {Word | undefined} name
     * @param {Expr} typeExpr
     * @param {boolean} optional
     */
    constructor(site: Site, name: Word | undefined, typeExpr: Expr, optional: boolean);
    /**
     * @readonly
     * @type {Site}
     */
    readonly site: Site;
    /**
     * @private
     * @readonly
     * @type {Word | undefined}
     */
    private readonly _name;
    /**
     * @private
     * @readonly
     * @type {Expr}
     */
    private readonly _typeExpr;
    /**
     * @private
     * @readonly
     * @type {boolean}
     */
    private readonly _optional;
    /**
     * @returns {boolean}
     */
    isNamed(): boolean;
    /**
     * @returns {boolean}
     */
    isOptional(): boolean;
    /**
     * @param {Scope} scope
     * @returns {ArgType}
     */
    eval(scope: Scope): ArgType;
    /**
     * @returns {string}
     */
    toString(): string;
}
export type FuncArgTypeExprI = {
    site: Site;
    isNamed(): boolean;
    isOptional(): boolean;
    eval(scope: Scope): ArgType;
    toString(): string;
};
import type { Site } from "@helios-lang/compiler-utils";
import { Scope } from "../scopes/index.js";
import { ArgType } from "../typecheck/index.js";
import type { Word } from "@helios-lang/compiler-utils";
import { Expr } from "./Expr.js";
//# sourceMappingURL=FuncArgTypeExpr.d.ts.map