import type { BinaryMalloyOperator } from '../types/binary_operators';
import type { ExprValue } from '../types/expr-value';
import { ExpressionDef } from '../types/expression-def';
import type { FieldSpace } from '../types/field-space';
export declare abstract class BinaryBoolean<opType extends BinaryMalloyOperator> extends ExpressionDef {
    readonly left: ExpressionDef;
    readonly op: opType;
    readonly right: ExpressionDef;
    elementType: string;
    legalChildTypes: import("../../..").TypeDesc[];
    constructor(left: ExpressionDef, op: opType, right: ExpressionDef);
    getExpression(fs: FieldSpace): ExprValue;
}