import type { ErrorUnion, UnionValue } from '../../treb-base-types/src/index';
export declare enum ErrorType {
    Argument = "ARG",
    Data = "DATA",
    Reference = "REF",
    Name = "NAME",
    Expression = "EXPR",
    Value = "VALUE",
    Unknown = "UNK",
    NotImpl = "NOTIMPL",
    Div0 = "DIV/0",
    NA = "N/A",
    Loop = "LOOP",// circular reference
    Spill = "SPILL"
}
export interface FunctionError {
    error: ErrorType;
}
export declare const NotImplError: FunctionError;
export declare const NAError: () => UnionValue;
export declare const ExpressionError: () => UnionValue;
export declare const DataError: () => UnionValue;
export declare const DivideByZeroError: () => UnionValue;
export declare const ArgumentError: () => UnionValue;
export declare const ValueError: () => ErrorUnion;
export declare const ReferenceError: () => UnionValue;
export declare const NameError: () => UnionValue;
export declare const SpillError: () => UnionValue;
export declare const UnknownError: () => UnionValue;
/**
 * type guard function
 *
 * ...this is maybe too precise?
 */
export declare const IsError: (test: unknown) => test is FunctionError;