On May 29, 2014, at 17:47 , Gedare Bloom <ged...@rtems.org> wrote:
> You understood precisely. I think it was not permitted in C90 perhaps?
> We should revisit it, but I think historically all variables are
> declared at the top of the function.
I'll dig up K&R, but I'm 95% sure it's been supported from the beginning. What
hasn't always been supported is declaring variables anywhere other than after
an opening bracket:
/* Local block */
{
invoke_foo();
int i;
invoke_bar(&i);
/* ... */
}
The argument for permitting declaration inside brackets (not as above, but as
allowed by K&R) is to declare variables in as restrictive a scope as possible.
The argument against is shadowing variables and getting subtle errors.
Peter
-----------------
Peter Dufault
HD Associates, Inc. Software and System Engineering
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