differences w/ enum in for loop between 3.3.2 and 3.4.3
corey taylor
corey.taylor@gmail.com
Wed Jul 6 20:40:00 GMT 2005
Steve,
You are correct about the C++ conflict.
Look at the 4th bullet in the C/Objective-C/C++ section:
http://gcc.gnu.org/gcc-3.4/changes.html
corey
On 7/6/05, Steve deRosier <derosier@pianodisc.com> wrote:
> Perhaps this is now against standard ISO C++ now, but in g++ 3.3.2, the following code compiled (snipped and adjusted of course):
>
> class whatever
> {
> private:
> typedef enum { BUFF_LEFT=0, BUFF_RIGHT=1, BUFF_SIZE=2 } eBuffSide;
> }
>
> void whatever::function( void )
> {
> for( eBuffSide i = BUFF_LEFT; i <= BUFF_RIGHT; (int(i))++ )
> {
> function2( i )
> ...
> }
> }
>
> Now with 3.4.3 I get an error:
> "error: ISO C++ forbids cast to non-reference type used as lvalue"
>
> What gives?
>
> Removing the cast gives me an error about not being able to find a postfix operator++. To make this compile under 3.4.3 I have to code as:
>
> for( int i = BUFF_LEFT; i <= BUFF_RIGHT; i++ )
> {
> function2( eBuffSide(i) )
> ...
> }
>
> Is there a better way to do this? (And no, I don't want to make eBuffSide into a class of its own w/ proper operator overloading, it is just intended to be a class-scope named constant.)
>
> - Steve
>
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