import type { ComparisonNode } from "ts-rsql";
import type { RsqlOperatorPlugin, SqlContext } from "./context";
export declare const CustomOperator: {
    readonly IS_EMPTY: "=empty=";
    readonly IS_NULL: "=null=";
    readonly IS_NULL_OR_EMPTY: "=nullorempty=";
};
export declare const OverwrittenOperator: {
    readonly IN: "=in=";
    readonly OUT: "=out=";
};
export declare const maybeExecuteRsqlOperatorPlugin: (context: SqlContext, ast: ComparisonNode, formattedSelector: string) => string | undefined;
export declare const isBooleanValueInvariant: (ast: ComparisonNode) => void;
export declare const MapInToEqualsAnyPlugin: RsqlOperatorPlugin;
export declare const MapOutToNotEqualsAllPlugin: RsqlOperatorPlugin;
export declare const IsNullPlugin: RsqlOperatorPlugin;
export declare const IsEmptyPlugin: RsqlOperatorPlugin;
export declare const IsNullOrEmptyPlugin: RsqlOperatorPlugin;
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