import { Decimal } from 'decimal.js';
import { Type } from '../types/datatype';
import { Constant } from './constants';
import { FcalFunction } from './function';
import { SymbolTable } from './symboltable';
declare type ValInputType = string | number | Decimal | Type;
declare type EnvInputType = {
    [index: string]: ValInputType;
} | Map<string, ValInputType>;
/**
 * Represents runtime variable environment
 * It represents state of fcal
 */
declare class Environment {
    readonly functions: FcalFunction.List;
    readonly symbolTable: SymbolTable;
    readonly constants: Constant;
    values: Map<string, Type>;
    /**
     * Creates new environment
     * @param {FcalFunction.List}functions list of functions
     * @param {SymbolTable} symbolTable symbol table
     * @param {Constant} constants constants
     */
    constructor(functions: FcalFunction.List, symbolTable: SymbolTable, constants: Constant);
    /**
     * Get the value of variable
     * @param {String} key variable name
     * @throws {FcalError} Error if variable is not available
     */
    get(key: string, start?: number, end?: number): Type;
    /**
     * create or assign a variable with value
     * @param {string} key variable name
     * @param {ValInputType} value value
     */
    set(key: string, value: ValInputType): void;
    /**
     * import values from  Object or Map
     * @param {Object | Map} values
     */
    use(values: EnvInputType): void;
}
export { Environment, EnvInputType };