[Coin-discuss] Problems compiling CoinLib under VC++ 6

[Laszlo Ladanyi]

Strange, I just checked out the code and the fix is there...

Anyway, I was wrong about VC++6 having a bug. That the C++ standard has
changed and in the previos standard the scope of a variable defined in a for
statement (but not within its body) was the whole block enclosing the for
statement, while in the current standard the scope of such variable is just
the loop (which makes a lot more sense, IMHO). The change has occured sometime
around the turn of the century :-), I googled for it a lot, but couldn't
pinpoint it. So VC++6 was correct at the time. It does have bugs (so does gcc,
what sufficiently complex program doesn't?), but this is not one of them.
VC++7 (the .NET version) adheres to the current standard, Thanks goes to JP
for pointing this out.

In general it's a good question which standard one should conform to in a
language. Use the latest and greatest *defined* features, which may be
inefficiently or maybe downright incorrectly implemented in some or all
compilers, or stick to an older standard, which may be clumsier. At what
point a switch should be made? I'm not sure what's the right answer.

--Laci

On Sun, 22 May 2005, Paolo wrote:

> Laszlo Ladanyi wrote:
> 
> >Hi Paolo,
> >
> >This is a bug in MSVC++ 6. It considers it a syntax error if you use the same
> >variable name to define variables in two independent basic block (something
> >enclosed in {}). Anyway, I changed the code to work around it by moving the
> >definition of iColumn to the beginning of the function. The change is
> >committed.
> >
> >--Laci
> >
> >On Fri, 20 May 2005, Paolo wrote:
> >
> >  
> >
> >>Hi guys,
> >>I'm trying to compile COIN using OSL under win32 using VC++ 6
> >>
> >>Compiler gives me the following error:
> >>
> >>CoinFactorization2.cpp
> >>i:\RicOp2\COIN\Coin\CoinFactorization2.cpp(530) : error C2374: 'iColumn' 
> >>: redefinition; multiple initialization
> >>        i:\RicOp2\COIN\Coin\CoinFactorization2.cpp(465) : see 
> >>declaration of 'iColumn'
> >>in project CoinLib
> >>
> >>Any idea to solve this problem?
> >>
> >>Thanks
> >>
> >>Paolo Chil?
> >>_______________________________________________
> >>Coin-discuss mailing list
> >>Coin-discuss at list.coin-or.org
> >>http://list.coin-or.org/mailman/listinfo/coin-discuss
> >>
> >>    
> >>
> >
> >
> >_______________________________________________
> >Coin-discuss mailing list
> >Coin-discuss at list.coin-or.org
> >http://list.coin-or.org/mailman/listinfo/coin-discuss
> >
> >
> >  
> >
> I updated sources with WinCVS but still no result... I think changes you 
> have made has not been committed... I'll try moving the declaration 
> myself but it would be nice to have the change in sources
> 
> Paolo
>