import type { FilterComparisonOperator, FilterLogicalOperator, ProductAttribute } from '../types/product.js';
/** Comparison operators for FilterQL (jsep binary ops, same precedence). */
export declare const FILTER_COMPARISON_OPERATORS: readonly ["=", "!=", "LIKE"];
/** Logical connectors for FilterQL (jsep binary ops, AND binds tighter than OR). */
export declare const FILTER_LOGICAL_OPERATORS: readonly ["AND", "OR"];
/** Same operators as {@link FILTER_LOGICAL_OPERATORS}; OR first for autocomplete ordering. */
export declare const FILTER_LOGICAL_OPERATORS_SUGGESTION_ORDER: readonly ["OR", "AND"];
/**
 * jsep registration: name + precedence (higher binds tighter).
 * Must stay in sync with FILTER_COMPARISON_OPERATORS and FILTER_LOGICAL_OPERATORS.
 */
export declare const FILTER_QL_JSEP_BINARY_OPS: readonly {
    name: string;
    precedence: number;
}[];
/**
 * Fields allowed in FilterQL comparisons. Single source for parser, API, and UI autocomplete.
 */
export declare const FILTER_QL_ATTRIBUTES: readonly ProductAttribute[];
/**
 * Single characters that trigger operator/paren token boundaries in the FilterQLCard tokenizer
 * (must cover =, !=, LIKE, AND, OR, parentheses).
 */
export declare const FILTER_QL_TOKENIZER_SPLIT_CHARS: readonly ["=", "!", "L", "I", "K", "E", "A", "N", "D", "O", "R", "(", ")"];
export declare const FILTER_QL_TOKENIZER_SPLIT_CHAR_SET: Set<string>;
export declare function isFilterComparisonToken(token: string): token is FilterComparisonOperator;
export declare function isFilterLogicalToken(token: string): token is FilterLogicalOperator;
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