It seems I learn best by expanding examples from the tutorials and
example files - but I usually end up about a half step ahead of what I
really understand. I'm trying to split my code into .C and .h files
based on several of the files in the charts example, and I've ended up
with a compiler error. It looks like it is coming from the first line
of the file (following a path of #include's) but if I truncate the
file, it compiles.
File traitsUI.C has first three lines:
#include "wttrees.h"
#include "traitsUI.h"
#include "traitsDB.h"
File wttrees.h starts with
#ifndef WTTREES_H_
#define WTTREES_H_
#include <Wt/WApplication>
and then has one class definition, similar to a simplified version from
the charts example.
Compiling this gives:
In file included from /usr/include/Wt/WWebWidget:14:0,
from /usr/include/Wt/WBreak:10,
from /usr/include/Wt/WCssStyleSheet:14,
from /usr/include/Wt/WApplication:23,
from /var/www/treesdb/htdocs/wttrees/src/wttrees.h:4,
from /var/www/treesdb/htdocs/wttrees/src/traitsUI.C:1:
/usr/include/boost/noncopyable.hpp: In member function 'Wt::WWidget&
Wt::WWidget::operator=(const Wt::WWidget&)':
/usr/include/boost/noncopyable.hpp:28:26: error: 'const
boost::noncopyable_::noncopyable&
boost::noncopyable_::noncopyable::operator=(const
boost::noncopyable_::noncopyable&)' is private
/usr/include/Wt/WWidget:66:1: error: within this context
If I truncate traitsUI.C after those three lines, that file compiles,
and I get errors in the next file. However, as I'm working my way
through those errors, it seems that I can fix an error on line 15, and
the next compile shows an error on line 5. Because of this, I'm
assuming the above error might actually be due to something I'm doing
later in the file. Can anybody suggest what type of thing might I be
doing to cause it - or which piece of the documentation to read to get
a better handle on what I'm probably doing wrong? As far as I know,
the only boost related stuff I've added so far is a dbo::collection in
traitsDB.C, which is why I don't understand getting the error above -
when that file isn't involved.
Thanks for any suggestions on how I can go about unraveling and
understanding this.
Jack
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