This is the mail archive of the gcc-bugs@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

[Bug c++/58856] New: [4.9 Regression] spurious 'wrong number of template arguments' error for template alias


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58856

            Bug ID: 58856
           Summary: [4.9 Regression] spurious 'wrong number of template
                    arguments' error for template alias
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: st at quanttec dot com

The current trunk version of GCC fails to compile the following valid sample

template <typename T>
struct U1 {};

template <typename T1, typename... Ts>
using U2 = U1<T1>;

template <typename T1, typename... Ts>
using U3 = U2<T1, Ts...>;

> g++ -std=c++11 -Wall -Wextra test.cpp
test.cpp:8:24: error: wrong number of template arguments (2, should be 1)
 using U3 = U2<T1, Ts...>;
                        ^
test.cpp:2:8: error: provided for âtemplate<class T> struct U1â
 struct U1 {};
        ^

This bug doesn't seem to exist in
g++ (GCC) 4.8.1 20130603 (Red Hat 4.8.1-1)
and in
g++ (Built by MinGW-builds project) 4.9.0 20130717 (experimental)

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]