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system.nim documentation: setLen can handle nil now

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This commit is contained in:
Andreas Rumpf 2018-04-28 09:31:22 +02:00
commit 1eaeb8945b
1 changed files with 2 additions and 4 deletions
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lib/system.nim
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@ -1280,15 +1280,13 @@ proc setLen*[T](s: var seq[T], newlen: Natural) {.
## sets the length of `s` to `newlen`. ## sets the length of `s` to `newlen`.
## ``T`` may be any sequence type. ## ``T`` may be any sequence type.
## If the current length is greater than the new length, ## If the current length is greater than the new length,
## ``s`` will be truncated. `s` cannot be nil! To initialize a sequence with ## ``s`` will be truncated.
## a size, use ``newSeq`` instead.
proc setLen*(s: var string, newlen: Natural) {. proc setLen*(s: var string, newlen: Natural) {.
magic: "SetLengthStr", noSideEffect.} magic: "SetLengthStr", noSideEffect.}
## sets the length of `s` to `newlen`. ## sets the length of `s` to `newlen`.
## If the current length is greater than the new length, ## If the current length is greater than the new length,
## ``s`` will be truncated. `s` cannot be nil! To initialize a string with ## ``s`` will be truncated.
## a size, use ``newString`` instead.
## ##
## .. code-block:: Nim ## .. code-block:: Nim
## var myS = "Nim is great!!" ## var myS = "Nim is great!!"