import { Expr } from '../parser/expr';
import { Token } from '../parser/lex/token';
import { Type } from '../types/datatype';
import { Phrases } from '../types/phrase';
import { Unit } from '../types/units';
import { Converter } from './converter';
import { Environment } from './environment';
import { Scale } from './scale';
declare class Evaluator implements Expr.IVisitor<Type> {
    readonly environment: Environment;
    private readonly ast;
    private readonly source?;
    private readonly parser?;
    private strict;
    constructor(source: string | Expr, phrases: Phrases, units: Unit.List, environment: Environment, c: Converter, scale: Scale, strict: boolean);
    getAST(): string;
    toJSON(): string;
    toObj(): object;
    getScannedTokens(): Token[] | undefined;
    visitCallExpr(expr: Expr.Call): Type;
    visitAssignExpr(expr: Expr.Assign): Type;
    visitVariableExpr(expr: Expr.Variable): Type;
    evaluateExpression(): Type;
    visitConversionExpr(expr: Expr.ConversionExpr): Type;
    visitUnitExpr(expr: Expr.UnitExpr): Type;
    visitTernaryExpr(expr: Expr.Ternary): Type;
    visitLogicalExpr(expr: Expr.Logical): Type;
    visitBinaryExpr(expr: Expr.Binary): Type;
    visitGroupingExpr(expr: Expr.Grouping): Type;
    visitLiteralExpr(expr: Expr.Literal): Type;
    visitUnaryExpr(expr: Expr.Unary): Type;
    visitPercentageExpr(expr: Expr.Percentage): Type;
    private evaluate;
    private checkInvalidOperation;
    private throwUnexpectedUnits;
}
export { Evaluator };