OpenEuphoria

Re: ODBC namespace identifier

• Posted by Alex Chamberlain <alex.chamberlain at tiscali.co.uk> Dec 07, 2005
• 491 views

Juergen Luethje wrote:
> 
> Rad wrote:
> 
> > I am using odbc.e with the name space identifier ODBC in the
> > Begin area of WinMain() window.
> > 
> > }}}
<eucode>
> > include odbc.e as ODBC
> > </eucode>
{{{

> > 
> > 
> > I have also included a library mss.ew of my own routines after odbc.
> > 
> > }}}
<eucode>
> > include mss.ew
> > </eucode>
{{{

> > 
> > 
> > Now, I have written a procedure in mss.ew which accesses ODBC:getData()
> > function, but ODBC name space identifier is not recognised.
> > 
> > I get following error:
> > 
> > D:\EUPHORIA\IDE\Projects\Syndicate ODBC\mss.ew:155
> > ODBC has not been declared
> >     		rec_data = ODBC:getData(sysmsgs_hndl)
> >     		              ^
> > 
> > Only when I move the concerned procedure to the General area of the window
> > where ODBC is accessed, the name space identifier is recognized and system
> > works fine.
> > 
> > Is it a problem with ODBC or am I doing something wrong?
> > How can I avoid having my own routine outside mss.ew?
> 
> See section "Scope" in the reference manual:
>      <a
>      href="http://www.rapideuphoria.com/refman_2.htm#42">http://www.rapideuphoria.com/refman_2.htm#42</a>
> 
> | A namespace identifier has local scope. It is known only within the file
> | that declares it, i.e. the file that contains the include statement.
> | Different files might define different namespace identifiers to refer to
> | the same included file. 
> 
> When your library 'mss.ew' also contains a line such as
>      include odbc.e as ODBC
> 
> then your program should work as expected.

I think it needs mentioning that the include will not be included, parsed and
executed twice - it will simply be visible for use in mss.ew.

Alex