On Mon, Jan 07, 2008 at 02:59:52AM -0800, Andrew Lentvorski wrote:
It is considered bad style in C++ because of the semantics of stack
allocation.
Declaring everything at the top of a function means that everything gets
allocated on the stack immediately upon function entry and is held until
function exit.
I doubt you could find a compiler still around that would perform this
basic of an optimization. I'm not even sure you would ever find a compiler
that accepted mixed-declarations and allocated by default on exit. The
only time you need to delay the allocation is when the size isn't known
until the declaration (such as an array dimension). In this case, it
wouldn't be possible to move the declaration to the top anyway.
Dave
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