/**
 * VariableLineParser
 *
 * Parses variable lines from HTTP request content.
 * Handles REST Client @name directive and variable assignments.
 *
 * Supported syntax:
 * - @name requestId (REST Client named request)
 * - @key = value (variable assignment)
 * - @key = $.jsonpath (JSONPath for response variable extraction)
 */
import { VariableUpdate } from '../types';
/**
 * Type of variable line
 */
export type VariableLineType = 'name' | 'variable' | 'jsonpath' | 'invalid';
/**
 * Result from parsing a variable line
 */
export interface VariableLineResult {
    type: VariableLineType;
    /** Request ID for @name directive */
    requestId?: string;
    /** Variable key */
    key?: string;
    /** Variable value or JSONPath expression */
    value?: string;
    /** Whether value is a JSONPath expression */
    isJsonPath?: boolean;
    /** Error message for invalid lines */
    error?: string;
}
export declare class VariableLineParser {
    /**
     * Check if a line is a variable line (starts with @)
     */
    isVariableLine(line: string): boolean;
    /**
     * Parse a single variable line
     */
    parse(line: string): VariableLineResult;
    /**
     * Parse multiple lines, returning results for variable lines only
     */
    parseMultiple(lines: string[]): VariableLineResult[];
    /**
     * Extract all variable lines from content
     */
    extractFromContent(content: string): VariableLineResult[];
    /**
     * Convert a parse result to VariableUpdate format
     * Returns null for name directives or invalid results
     */
    toVariableUpdate(result: VariableLineResult): VariableUpdate | null;
    /**
     * Check if a line is a variable line (starts with @)
     */
    static isVariableLine(line: string): boolean;
    /**
     * Parse a single variable line
     */
    static parse(line: string): VariableLineResult;
}