The following code demonstrates that GCC raises an invalid error on certain
template function syntax. It is the same error than on
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19552 but on a NON-DEPENDENT name,
so the error is not appropriate here.
Please also note that this code compiles on MSVC++ EE 2005.
Here is the source code:
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class template_function
{
public:
template <int N>
int func()
{
return N;
};
};
class non_template_class
{
public:
template_function tf;
void run()
{
tf.func<36>(); // SUCCESS
}
};
// The PointLess template parameter makes gcc
// fail to see that tf is a non-dependent name
template <int PonitLess>
class template_class
{
public:
template_function tf;
void run()
{
tf.func<42>(); // FAIL
}
};
int main()
{
non_template_class ntc;
ntc.run();
template_class<0> tc;
tc.run();
return 0;
}
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Here is the output of G++:
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Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2.3/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--disable-checking --with-system-zlib --enable-__cxa_atexit
--host=i386-redhat-linux
Thread model: posix
gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-34)
/usr/lib/gcc-lib/i386-redhat-linux/3.2.3/cpp0 -lang-c++ -D__GNUG__=3
-D__DEPRECATED -D__EXCEPTIONS -v -D__GNUC__=3 -D__GNUC_MINOR__=2
-D__GNUC_PATCHLEVEL__=3 -D__GXX_ABI_VERSION=102 -D__ELF__ -Dunix
-D__gnu_linux__ -Dlinux -D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__
-D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1
-D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__
-D__tune_i386__ main.cpp -Wall main.ii
GNU CPP version 3.2.3 20030502 (Red Hat Linux 3.2.3-34) (cpplib) (i386
Linux/ELF)
ignoring nonexistent directory "/usr/i386-redhat-linux/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/3.2.3
/usr/include/c++/3.2.3/i386-redhat-linux
/usr/include/c++/3.2.3/backward
/usr/local/include
/usr/lib/gcc-lib/i386-redhat-linux/3.2.3/include
/usr/include
End of search list.
/usr/lib/gcc-lib/i386-redhat-linux/3.2.3/cc1plus -fpreprocessed main.ii -quiet
-dumpbase main.cpp -Wall -version -o main.s
GNU CPP version 3.2.3 20030502 (Red Hat Linux 3.2.3-34) (cpplib) (i386
Linux/ELF)
GNU C++ version 3.2.3 20030502 (Red Hat Linux 3.2.3-34) (i386-redhat-linux)
compiled by GNU C version 3.2.3 20030502 (Red Hat Linux 3.2.3-34).
main.cpp: In member function `void template_class<PonitLess>::run()':
main.cpp:34: syntax error before `;' token
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
And here is the main.ii file:
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# 1 "main.cpp"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "main.cpp"
class template_function
{
public:
template <int N>
int func()
{
return N;
};
};
class non_template_class
{
public:
template_function tf;
void run()
{
tf.func<36>();
}
};
template <int PonitLess>
class template_class
{
public:
template_function tf;
void run()
{
tf.func<42>();
}
};
int main()
{
non_template_class ntc;
ntc.run();
template_class<0> tc;
tc.run();
return 0;
}
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
--
Summary: Invalid template error on non-dependent name
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: trundeg at hotmail dot com
GCC host triplet: Linux cfr1ll19 2.4.21-37.ELsmp #1 SMP Wed Sep 7 13:28:55
EDT 200
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32022
