import { HDict } from 'haystack-core';
export declare const REG_EXPR_MATCHING_TEMPLATE: RegExp;
/**
 * Replaces variables (defined as {{parameterName}}) in an expression with the values given in the parameters dict.
 * The HVal.toAxon function is used for conversion to a string. Optional parameters can be marked using a '?'
 * after the parameter name. They can safely be omitted in the parameters Dict.
 * @example
 * resolveTemplatedExpression("func({{num}})", HDict.make({num: HNum.make(22)})) => "func(22)"
 * @example
 * resolveTemplatedExpression("func({{num}}, {{unit?}})", HDict.make({num: HNum.make(22)})) => "func(22, null)"
 * @param expr the axon expression
 * @param params the parameters expressed as dict
 * @returns the axon expression resolved with the specified params
 */
export declare const resolveTemplateExpression: (expr: string, parameters?: HDict) => string;
/**
 * Replaces template variable found in the given string using a given replacer function
 * @param templateString
 * @param replacer
 * @returns a new string containing the compiled template string
 */
export declare const replaceTemplateVariables: (templateString: string, replacer: (substring: string, match: string, optional: string) => string) => string;