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Added limitations note to sizeof. Closes #4153.

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Yuriy Glukhov 2016-05-13 20:09:14 +03:00
commit 5a49c51b4c
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lib/system.nim
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@ -588,6 +588,9 @@ proc sizeof*[T](x: T): int {.magic: "SizeOf", noSideEffect.}
## that one never needs to know ``x``'s size. As a special semantic rule, ## that one never needs to know ``x``'s size. As a special semantic rule,
## ``x`` may also be a type identifier (``sizeof(int)`` is valid). ## ``x`` may also be a type identifier (``sizeof(int)`` is valid).
## ##
## Limitations: If used within nim VM context ``sizeof`` will only work
## for simple types.
##
## .. code-block:: nim ## .. code-block:: nim
## sizeof('A') #=> 1 ## sizeof('A') #=> 1
## sizeof(2) #=> 8 ## sizeof(2) #=> 8