[erlang-questions] Construct parameter dynamically, sometimes illegal?

[mog]

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Caspar Florian Ebeling wrote:
| I'm really a bit confused about cases when it is not possible to
| pass parameters which were created dynamically. An example:
| this does not work,
|
|     {ok, File} = file:open("writebench.data.erl",
|                [write, binary, raw, {delayed_write, math:pow(2, 12), 
1000}]
math:pow(Int) -> Float, so that will be the wrong type for that 
function, if you have a function that returns an int I am sure it will 
work, or if you surround it in a round or trunc it will work fine.

Mog
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