template function in inner class

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  • Christof Warlich
    #1

    template function in inner class

    Hi,

    could anyone tell what's wrong with this?:

    template<int x>
    struct Outer {
    struct Inner {
    template<int yvoid finner() {}
    };
    Inner inner;
    void fouter() {inner.finner<0 >();}
    };

    Thanks,

    Christof
    Tags: None
    • Lionel B
      #2
      Re: template function in inner class

      On Tue, 07 Oct 2008 10:41:59 +0200, Christof Warlich wrote:
      Hi,
      >
      could anyone tell what's wrong with this?:
      >
      template<int x>
      struct Outer {
      struct Inner {
      template<int yvoid finner() {}
      };
      Inner inner;
      void fouter() {inner.finner<0 >();}
      void fouter() {inner.template finner<0>();}
      };
      compiles for me. I'm not clear on why this might be required.

      --
      Lionel B

        Comment

        • Christof Warlich
          #3
          Re: template function in inner class

          Lionel B schrieb:
          compiles for me. I'm not clear on why this might be required.
          It doesn't compile with my gcc:

          $ g++ --version
          g++ (GCC) 3.4.6
          Copyright (C) 2006 Free Software Foundation, Inc.
          This is free software; see the source for copying conditions. There is NO
          warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
          $ g++ -c tst.cc
          tst.cc: In member function `void Outer<x>::foute r()':
          tst.cc:8: error: expected primary-expression before ')' token

          So this may be a compiler bug?! I'll try with a more recent gcc version
          tonight. Which compiler did you use?

          Thanks and regards,

          Christof


            Comment

            • Lionel B
              #4
              Re: template function in inner class

              On Tue, 07 Oct 2008 12:38:43 +0200, Christof Warlich wrote:
              Lionel B schrieb:
              >compiles for me. I'm not clear on why this might be required.
              >
              It doesn't compile with my gcc:
              >
              $ g++ --version
              g++ (GCC) 3.4.6
              Copyright (C) 2006 Free Software Foundation, Inc. This is free software;
              see the source for copying conditions. There is NO warranty; not even
              for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ g++ -c tst.cc
              tst.cc: In member function `void Outer<x>::foute r()': tst.cc:8: error:
              expected primary-expression before ')' token
              >
              So this may be a compiler bug?! I'll try with a more recent gcc version
              tonight. Which compiler did you use?
              Odd. The amended code compiles for me here with gcc 3.4.6 (also gcc
              4.3.1, 4.3.0 4.1.2 and Intel icc 10.0).

              All the above gcc versions reject your original code, although icc
              accepts it.

              Comeau (about as standards-compliant as it gets) rejects your original
              code with:

              "ComeauTest .c", line 7: error: expected an expression
              void fouter() {inner.finner<0 >();}

              and accepts the amended version.

              --
              Lionel B

                Comment

                • Triple-DES
                  #5
                  Re: template function in inner class

                  On 7 Okt, 12:38, Christof Warlich <cwarl...@alcat el-lucent.dewrote:
                  Lionel B schrieb:
                  >
                  compiles for me. I'm not clear on why this might be required.
                  >
                  It doesn't compile with my gcc:
                  >
                  $ g++ --version
                  g++ (GCC) 3.4.6
                  Copyright (C) 2006 Free Software Foundation, Inc.
                  This is free software; see the source for copying conditions.  There isNO
                  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
                  $ g++ -c tst.cc
                  tst.cc: In member function `void Outer<x>::foute r()':
                  tst.cc:8: error: expected primary-expression before ')' token
                  >
                  So this may be a compiler bug?! I'll try with a more recent gcc version
                  tonight. Which compiler did you use?
                  >
                  Thanks and regards,
                  >
                  Christof
                  Did you try:

                  template<int x>
                  struct Outer {
                  struct Inner {
                  template<int yvoid finner() {}
                  };
                  Inner inner;
                  void fouter() {inner.template finner<0>();}
                  };

                  ?





                    Comment

                    • Christof Warlich
                      #6
                      Re: template function in inner class

                      Triple-DES schrieb:
                      Did you try:
                      >
                      template<int x>
                      struct Outer {
                      struct Inner {
                      template<int yvoid finner() {}
                      };
                      Inner inner;
                      void fouter() {inner.template finner<0>();}
                      };
                      No, I missed Lionel's change. With the change, it works
                      for me as well :-).

                        Comment

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