The compiler is unable to find inherited template member data from within the
derived class's method. In the sample code, B inherits from A, but within a
method of B, the compiler can not resolve A's member data.
$ /opt/gcc-4.2.2/bin/g++ -v --save-temps dim.cpp
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc-4.2.2/configure --disable-nls --prefix=/opt/gcc-4.2.2
Thread model: posix
gcc version 4.2.2
/opt/gcc-4.2.2/libexec/gcc/i686-pc-linux-gnu/4.2.2/cc1plus -E -quiet -v
-D_GNU_SOURCE dim.cpp -mtune=generic -fpch-preprocess -o dim.ii
ignoring nonexistent directory
"/opt/gcc-4.2.2/lib/gcc/i686-pc-linux-gnu/4.2.2/../../../../i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/opt/gcc-4.2.2/lib/gcc/i686-pc-linux-gnu/4.2.2/../../../../include/c++/4.2.2
/opt/gcc-4.2.2/lib/gcc/i686-pc-linux-gnu/4.2.2/../../../../include/c++/4.2.2/i686-pc-linux-gnu
/opt/gcc-4.2.2/lib/gcc/i686-pc-linux-gnu/4.2.2/../../../../include/c++/4.2.2/backward
/usr/local/include
/opt/gcc-4.2.2/include
/opt/gcc-4.2.2/lib/gcc/i686-pc-linux-gnu/4.2.2/include
/usr/include
End of search list.
/opt/gcc-4.2.2/libexec/gcc/i686-pc-linux-gnu/4.2.2/cc1plus -fpreprocessed
dim.ii -quiet -dumpbase dim.cpp -mtune=generic -auxbase dim -version -o dim.s
GNU C++ version 4.2.2 (i686-pc-linux-gnu)
compiled by GNU C version 4.1.2 20061115 (prerelease) (Debian
4.1.1-21).
GGC heuristics: --param ggc-min-expand=64 --param ggc-min-heapsize=64516
Compiler executable checksum: c0ecf79946fb161889ae27aec5e0ef1f
dim.cpp: In member function 'T B<T>::m()':
dim.cpp:8: error: 'x' was not declared in this scope
$ cat dim.cpp
template <class T>
struct A {
T x;
};
template <class T>
struct B : A<T> {
T m() { return x; }
};
$ cat dim.ii
# 1 "dim.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "dim.cpp"
template <class T>
struct A {
T x;
};
template <class T>
struct B : A<T> {
T m() { return x; }
};
--
Summary: Incorrect scope resolution for inherited template
member.
Product: gcc
Version: 4.2.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: john_millaway at ghrsystems dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35187
