I try to assign a template to another template. Direct assignment works,
but when I try to assign the result of a function call, gcc fails. Under
the given canditates the expected one is listed.
following code fails using gcc:
====================================================================
// template test for gcc
//
template<class TEST>
class Pointer
{
public:
Pointer(TEST initValue): m_data(initValue) {}
Pointer(Pointer<TEST> &other): m_data(other.m_data) {}
virtual ~Pointer() {}
//Pointer<TEST> &operator = (Pointer<TEST> &other) { m_data =
other.m_data; return *this; }
private:
TEST m_data;
};
template<class TEST>
class UsePointer
{
public:
UsePointer(Pointer<TEST> &point)
: m_localCopy(point)
{}
UsePointer(Pointer<TEST> point)
: m_localCopy(point)
{
}
private:
Pointer<TEST> m_localCopy;
};
Pointer<int> getSomething()
{
Pointer<int> result(4);
return result;
}
int main(int argc, char* argv[])
{
UsePointer<int> user(getSomething());
return 0;
}
====================================================================
with following output
====================================================================
[EMAIL PROTECTED]:~/Entwicklung/eigenes$ gcc -v -save-temps -c templates.cpp -o
templtest
Reading specs from /usr/lib/gcc-lib/i486-linux/3.3.5/specs
Configured with: ../src/configure -v
--enable-languages=c,c++,java,f77,pascal,objc,ada,treelang --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-gxx-include-dir=/usr/include/c++/3.3 --enable-shared --with-system-zlib
--enable-nls --without-included-gettext --enable-__cxa_atexit
--enable-clocale=gnu --enable-debug --enable-java-gc=boehm
--enable-java-awt=xlib --enable-objc-gc i486-linux
Thread model: posix
gcc version 3.3.5 (Debian 1:3.3.5-2)
/usr/lib/gcc-lib/i486-linux/3.3.5/cc1plus -E -D__GNUG__=3 -quiet -v
-D__GNUC__=3 -D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=5 -D_GNU_SOURCE
templates.cpp templates.ii
ignoring nonexistent directory "/usr/i486-linux/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/3.3
/usr/include/c++/3.3/i486-linux
/usr/include/c++/3.3/backward
/usr/local/include
/usr/lib/gcc-lib/i486-linux/3.3.5/include
/usr/include
End of search list.
/usr/lib/gcc-lib/i486-linux/3.3.5/cc1plus -fpreprocessed templates.ii -quiet
-dumpbase templates.cpp -auxbase-strip templtest -version -o templates.s
GNU C++ version 3.3.5 (Debian 1:3.3.5-2) (i486-linux)
compiled by GNU C version 3.3.5 (Debian 1:3.3.5-2).
GGC heuristics: --param ggc-min-expand=99 --param ggc-min-heapsize=129567
templates.cpp: In function `int main(int, char**)':
templates.cpp:45: error: no matching function for call to `Pointer<int>::
Pointer(Pointer<int>)'
templates.cpp:9: error: candidates are: Pointer<TEST>::Pointer(Pointer<TEST>&)
[with TEST = int]
templates.cpp:8: error: Pointer<TEST>::Pointer(TEST) [with
TEST
= int]
templates.cpp:45: error: initializing argument 1 of `
UsePointer<TEST>::UsePointer(Pointer<TEST>) [with TEST = int]'
====================================================================
--
Summary: assignment from function to template fails
Product: gcc
Version: 3.3.5
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: d dot hentrich at gmx dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC host triplet: linux
GCC target triplet: linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19112
