import type { RsqlOperatorPlugin } from "../context";
type SymbolicOperator = "<" | "<=" | ">" | ">=" | "==" | "!=";
type NamedOperator = `=${"lt" | "le" | "gt" | "ge" | "in" | "out"}=`;
export type KnownOperator = SymbolicOperator | NamedOperator;
export declare const toSqlOperator: (operator: KnownOperator, keywordsLowerCase?: boolean, detachedOperators?: boolean) => string;
export declare const isKnownOperator: (maybe: string) => maybe is KnownOperator;
export declare const isPluginOperator: (maybe: string, plugins?: RsqlOperatorPlugin[]) => boolean;
export {};
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