[boost] Re: Warning about a truncated decorated name withsmart_ptr.hpp

From: Nick Ambrose (nick_at_[hidden])
Date: 1999-10-28 15:10:25

Duh ! Sorry, ignore my ranting. I was of course referring to the C4786 error.
Frankly, this 4503 one sounds scary since it does not (as far as i can see) refer to
the debug info.
However, I have never seen 4503. ever. I can't imagine that the limit is 255 here -
since I have seen 4786 for which the limit is 255.

Nick

Nick Ambrose wrote:

> Ed Brey wrote:
>
> > Gaddy Barchana-Lorand wrote:
> > >
> > > I have downloaded the smart_ptr.hpp header file, and when compiling my code
> > > (with MSVC 6.0) I get the the C4503 warning (decorated name length exceeded,
> > > name was truncated).
> >
> > I recently ran into this same problem, although with my own template,
> > rather than a boost one.
> >
> > > 1. Is there a way to avoid the warning (as I'm using the smrt_ptr with STL -
> > > the names get very long quite easily)?
> >
> > Get a better compiler.  Of course, if you're like me and that option
> > doesn't work, a viable plan B is to simply disable the warning with
> > #pragma disable.
> >
> > > 2. Is it safe to ignore the warning (Don't think so...)?
> >
> > AFAK, it is.  The warning is telling you that the compiler is
> > truncating the mangled name at 255 characters, much like the way more
> > primitive compilers used to truncate variable names at 32 characters.
> > So, as long as your first 255 characters are unique, you're fine.  I
> > haven't examined the mangled names in detail, but I expect that this
> > is the case, based on where I see early differences that I see in the
> > "human readable" names that the compiler spits on an error.
> >
>
> I think it is not the actual names that are truncated, just the names in the debug
> info.
> This means that you might have problems inspecting the symbols in the debugger,
> but the full names should be used
> in the actual generated code, so it should be safe to ignore without the danger of
> duplicate names or the wrong symbol being picked up.
>
> Disclaimer: I haven't actually verified this, but it's the understanding I came to
> from the actual text of the message (it is quite specific that the name is being
> truncated in the debug info)
> Nick
>
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