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Date: Sat, 16 Mar 2013 10:29:59 +0100
From: Georg Bauhaus <rm.dash-bauhaus@futureapps.de>
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Subject: Re: Is this expected behavior or not
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Date: 2013-03-16T10:30:00+01:00
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On 15.03.13 22:46, Robert A Duff wrote:
> That works in C because all sizes
> are known at compile time.

That's true in C89, but C99 makes sizeof an execution
time operator for variable length arrays. The operand
is then evaluated.

6.5.3.4 has this example,

#include <stddef.h>

size_t fsize3(int n)
{
   char b[n+3];     // variable length array
   return sizeof b; // execution time sizeof
}