/**
 * 字符串模板替换工具函数
 * 使用单次遍历和正则表达式缓存来提高性能
 */
type ReplacementMap = Record<string, string>;
/**
 * 字符串模板替换函数
 * @param template 模板字符串，如 "Hello {name}, you have {count} messages"
 * @param replacements 替换对象，如 { name: "John", count: "5" }
 * @param beginSeg 占位符开始符号，默认为 "{"
 * @param endSeg 占位符结束符号，默认为 "}"
 * @returns 替换后的字符串
 *
 * @example
 * ```ts
 * replaceTemplate("Hello {name}!", { name: "World" })
 * // => "Hello World!"
 *
 * replaceTemplate("Price: {{amount}}", { amount: "$100" }, "{{", "}}")
 * // => "Price: $100"
 *
 * replaceTemplate("You have {count} items", { count: "5", unused: "test" })
 * // => "You have 5 items" (unused 键会被忽略)
 *
 * replaceTemplate("Hello ${name}!", { name: "World" }, "${", "}")
 * // => "Hello World!"
 * ```
 */
export declare function replaceTemplate(template: string, replacements: ReplacementMap, beginSeg?: string, endSeg?: string): string;
/**
 * 批量字符串模板替换函数（用于一次性替换多个模板）
 * @param templates 模板字符串数组
 * @param replacements 替换对象
 * @param beginSeg 占位符开始符号，默认为 "{"
 * @param endSeg 占位符结束符号，默认为 "}"
 * @returns 替换后的字符串数组
 *
 * @example
 * ```ts
 * replaceTemplates(
 *   ["Hello {name}!", "You have {count} items"],
 *   { name: "John", count: "5" }
 * )
 * // => ["Hello John!", "You have 5 items"]
 *
 * replaceTemplates(
 *   ["Hello {{name}}!", "Price: {{amount}}"],
 *   { name: "John", amount: "$100" },
 *   "{{",
 *   "}}"
 * )
 * // => ["Hello John!", "Price: $100"]
 * ```
 */
export declare function replaceTemplates(templates: string[], replacements: ReplacementMap, beginSeg?: string, endSeg?: string): string[];
/**
 * 从模板字符串中提取所有占位符键名
 * @param template 模板字符串
 * @param beginSeg 占位符开始符号，默认为 "{"
 * @param endSeg 占位符结束符号，默认为 "}"
 * @returns 占位符键名数组（去重）
 *
 * @example
 * ```ts
 * extractPlaceholders("Hello {name}, you have {count} new {count} messages")
 * // => ["name", "count"]
 *
 * extractPlaceholders("Hello {{name}}, price is {{amount}}", "{{", "}}")
 * // => ["name", "amount"]
 * ```
 */
export declare function extractPlaceholders(template: string, beginSeg?: string, endSeg?: string): string[];
export {};