import type { PropSymbol } from "../../models";
/**
 * Converts a logical expression string into an array of PropSymbols.
 *
 * - Uses `tokenizeString` to split the input string into tokens.
 * - Uses `createPropositionalSymbol` to convert tokens into `PropSymbol` objects.
 * - Assigns an index-based position to each symbol.
 *
 * @param input - The logical expression as a string.
 * @returns An array of `PropSymbol` objects representing the parsed expression.
 * @throws {Error}  If the input contains invalid characters.
 * @category Builders
 */
export declare function createPropExpression(input: string): PropSymbol[];