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update documentation for closureScope and capture (#12886)

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Judd
2019-12-21 15:06:32 +08:00
committed by Andreas Rumpf
parent 9b8afd1dbb
commit e1d79d40f2
2 changed files with 8 additions and 2 deletions
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3
doc/manual.rst
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@@ -3521,7 +3521,8 @@ Creating closures in loops
Since closures capture local variables by reference it is often not wanted
behavior inside loop bodies. See `closureScope
<system.html#closureScope.t,untyped>`_ for details on how to change this behavior.
<system.html#closureScope.t,untyped>`_ and `capture
<sugar.html#capture.m,openArray[typed],untyped>`_ for details on how to change this behavior.
Anonymous Procs
---------------

7
lib/system.nim
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@@ -4395,7 +4395,12 @@ when defined(nimNoNilSeqs2):
template closureScope*(body: untyped): untyped =
## Useful when creating a closure in a loop to capture local loop variables by
## their current iteration values. Example:
## their current iteration values.
##
## Note: This template may not work in some cases, use
## `capture <sugar.html#capture.m,openArray[typed],untyped>`_ instead.
##
## Example:
##
## .. code-block:: Nim
## var myClosure : proc()