Re: [sqlite] C++ struct declarations

[Pavel Ivanov]

> Is there a working (with C++) sqlite3.h equivalent available
> somewhere, or do I need to hack on it?

A lot of people on this list including me use sqlite3.h in their C++
applications and don't see any problems compiling that as is. So you
should look at how you use that header and/or how you compile your
application. If you can narrow your non-compiling C++ file to some
short piece of code you can post it here and we'll look what's wrong
with it.


Pavel

On Tue, Jul 20, 2010 at 1:51 AM, Christopher Vance  wrote:
> I've just started playing with SQLite on MacOS, Linux and OpenBSD,
> with the intent of compiling on Windows too.
>
> Using C, I think I'm getting the hang of it. Things compile fine, and
> seem to work.
>
> I've just tried using sqlite3.h (from the 3.6.23.1 amalgamation) with
> C++ and find that it contains stuff which won't compile on C++ (I'm
> currently using Apple's g++ 4.0.1).
>
> My understanding is that declarations like
>
>   typedef struct sqlite3 sqlite3;
>
> are improper in C++, because the struct declaration already makes
> sqlite3 a typedef. The error message says
>
>  error: forward declaration of ‘struct sqlite3’
>
> Unfortunately, there are a bunch of these. Perhaps making the typedef
> name different from the struct tag is sufficient to resolve the
> problem, although I'm guessing the compiler thinks it needs to know
> not only that sqlite3 is a name for a type, but also what the contents
> of the struct are.
>
> Is there a working (with C++) sqlite3.h equivalent available
> somewhere, or do I need to hack on it?
>
> Of course, I may have missed something obvious...
>
> --
> Christopher Vance
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>
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[sqlite] C++ struct declarations

[Christopher Vance]

I've just started playing with SQLite on MacOS, Linux and OpenBSD,
with the intent of compiling on Windows too.

Using C, I think I'm getting the hang of it. Things compile fine, and
seem to work.

I've just tried using sqlite3.h (from the 3.6.23.1 amalgamation) with
C++ and find that it contains stuff which won't compile on C++ (I'm
currently using Apple's g++ 4.0.1).

My understanding is that declarations like

   typedef struct sqlite3 sqlite3;

are improper in C++, because the struct declaration already makes
sqlite3 a typedef. The error message says

  error: forward declaration of ‘struct sqlite3’

Unfortunately, there are a bunch of these. Perhaps making the typedef
name different from the struct tag is sufficient to resolve the
problem, although I'm guessing the compiler thinks it needs to know
not only that sqlite3 is a name for a type, but also what the contents
of the struct are.

Is there a working (with C++) sqlite3.h equivalent available
somewhere, or do I need to hack on it?

Of course, I may have missed something obvious...

-- 
Christopher Vance
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