You probably forward declared a class somewhere to avoid having to
include another header file and now you're trying to use the class
you've forward declared still without including the header file.
For example:
Header.h:
class YourClass;
class MyClass {
private:
YourClass* p;
public:
YourClass* GetP() {return p};
};
Source.cpp:
#include "Header.h"
int main() {
MyClass m;
YourClass *p = m.GetP();
p->DoSomething(); <---- This will generate that error
Thanks,
Lyle
-----Original Message-----
From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On
Behalf Of Stephen torri
Sent: Wednesday, January 26, 2005 7:15 PM
To: gcc help
Subject: Method for finding reason behind "error: `obj' has incomplete
type"
Is there a way to figure out what is causing me to get an error message
that says:
"error: `obj' has incomplete type"
The full error message is:
../../src/data_source/File_Data_Transfer_T.cpp: In member function
`const typename Data_Type::ptr
kurt::data_source::File_Data_Transfer<Data_Type>::get() [with Data_Type
= kurt::data_types::Group_Seq]':
Event_Filter.cpp:314: instantiated from here
../../src/data_source/File_Data_Transfer_T.cpp:78: error: `obj' has
incomplete type
../../src/data_source/File_Data_Transfer_T.cpp:78: error: storage size
of `obj' isn't known
Line 314 in Event_Filter.cpp is the end of the namespace containing the
defintions for Event_Filter class.
Line 78 of File_Data_Transfer_T.cpp is the place where I try to use a
typename:
typename Data_Type::worker_type obj (new Data_Type());
Is there a compiler flag that I should use? Here are the flags I am
using:
g++ -DHAVE_CONFIG_H -I. -I. -I../../src -march=pentium3 -Wpointer-arith
-gdwarf-2 -g3 -O0 -W -Wall -fno-inline -ftemplate-depth-120 -c
Event_Filter.cpp -MT Event_Filter.lo -MD -MP -MF .deps/Event_Filter.TPlo
-fPIC -DPIC -o .libs/Event_Filter.o
Stephen
