Procs

proc dataPointer[T](a: T): pointer

same as C++ data that works with std::string, std::vector etc. Note: safe to use when a.len == 0 but whether the result is nil or not is implementation defined for performance reasons.   Source   Edit

proc forceCopy(result: var string; a: string) {....raises: [], tags: [].}

also forces a copy if a is shallow   Source   Edit

proc setLen(result: var string; n: int; isInit: bool) {....raises: [], tags: [].}

when isInit = false, elements are left uninitialized, analog to {.noinit.} else, there are 0-initialized.   Source   Edit

proc toLowerAscii(a: var string) {....raises: [], tags: [].}

optimized and inplace overload of strutils.toLowerAscii   Source   Edit