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wxSQLite3ResultSet - Cannot return NULL?
Posted: Fri Sep 17, 2010 5:33 pm
by evstevemd
I have a function that returns wxSQLite3ResultSet . However I want it to return NULL if something goes wrong. I cannot as it throws error:
error: conversion from 'int' to non-scalar type 'wxSQLite3ResultSet' requested
Is there alternative trick?
Re: wxSQLite3ResultSet - Cannot return NULL?
Posted: Fri Sep 17, 2010 8:07 pm
by utelle
evstevemd wrote:I have a function that returns wxSQLite3ResultSet . However I want it to return NULL if something goes wrong. I cannot as it throws error:
error: conversion from 'int' to non-scalar type 'wxSQLite3ResultSet' requested
Is there alternative trick?
Just return an invalid result set and check it in the calling procedure:
Code: Select all
wxSQLite3ResultSet myFunction()
{
//...
if (error)
return wxSQLite3ResultSet();
}
// code calling the function
wxSQLite3ResultSet myResultSet = myFunction();
if (myResultSet.IsOk())
{
// process result set
}
else
{
// handle error condition
}
Regards,
Ulrich
Posted: Sat Sep 18, 2010 1:21 pm
by evstevemd
that is cool and simple method. Thanks Urlich.