template-string-type-for-path.ts

type ToTS<T extends string> =
    T extends 'Int'
    ? number
    : T extends 'String'
    ? string
    : T extends 'Bool'
    ? boolean
    : never



type ParamType<T extends string> =
    T extends `<${infer ParamName}:${infer ParamType}>`
    ? { [key in ParamName]: ToTS<ParamType> }
    : {}

type ParamsType<T extends string> =
    T extends `/${infer Param}/${infer Rest}`
    ? ParamType<Param> & ParamsType<`/${Rest}`>
    : T extends `/${infer Param}`
    ? ParamType<Param>
    : {}



type PathToRegExp<T extends string> = {
    [key in keyof ParamsType<T>]: ParamsType<T>[key]
}

type T1 = PathToRegExp<`/users/<id:Int>/<name:String>/<isVip:Bool>`>