import { NumericValue } from "../../value/NumericValue.js";
import { Expr1 } from "../Expr1.js";
import { Expr } from "../Expr.js";
import { IfcExpressionContext } from "../../context/IfcExpressionContext.js";
import { ExprEvalError } from "../ExprEvalResult.js";
import { ExprType } from "../../type/ExprType.js";
import { ExprStringBuilder } from "../ExprStringBuilder.js";
export declare class UnaryMinusExpr extends Expr1<NumericValue, NumericValue> {
    constructor(value: Expr<NumericValue>);
    protected calculateResult(ctx: IfcExpressionContext, localCtx: Map<string, any>, subExpressionResult: NumericValue): ExprEvalError | NumericValue;
    protected buildExprString(builder: ExprStringBuilder): void;
    getType(): ExprType;
}