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QString Error

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  • hskoglundH Offline
    hskoglundH Offline
    hskoglund
    wrote on last edited by
    #14

    Hi, just guessing, but if that line is inside a class declaration (not outside) then you'll get that 108 error, for example:

    class MyClass {
    ...
    QString settingsFile("/boot/settings.json");
    ...
    };
    

    you could try

    class MyClass {
    ...
    QString settingsFile = "/boot/settings.json";
    ...
    };
    
    M 1 Reply Last reply
    0
    • hskoglundH hskoglund

      Hi, just guessing, but if that line is inside a class declaration (not outside) then you'll get that 108 error, for example:

      class MyClass {
      ...
      QString settingsFile("/boot/settings.json");
      ...
      };
      

      you could try

      class MyClass {
      ...
      QString settingsFile = "/boot/settings.json";
      ...
      };
      
      M Offline
      M Offline
      marvic_39
      wrote on last edited by
      #15

      @hskoglund

      Yes, tried that statement too. Here it's flashing error.

      QString settingsFile = "/neet/one.json";
      
      /home/cpp/cap.h:109: sorry, unimplemented: non-static data member initializers
      
      /home/cpp/cap.h:109: error: in-class initialization of static data member 'str' of non-literal type
      
      1 Reply Last reply
      0
      • RatzzR Offline
        RatzzR Offline
        Ratzz
        wrote on last edited by
        #16

        @hskoglund
        What is your GCC version ? less than 4.7?

        --Alles ist gut.

        M 2 Replies Last reply
        0
        • RatzzR Ratzz

          @hskoglund
          What is your GCC version ? less than 4.7?

          M Offline
          M Offline
          marvic_39
          wrote on last edited by
          #17

          @Ratzz

          gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
          

          I cross compiled Linux, OpenCV, FFmpeg Qt Raspi and many other apps never faced a compiler problems.

          Should this look like compiler version problem?

          RatzzR 1 Reply Last reply
          0
          • M marvic_39

            @Ratzz

            gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
            

            I cross compiled Linux, OpenCV, FFmpeg Qt Raspi and many other apps never faced a compiler problems.

            Should this look like compiler version problem?

            RatzzR Offline
            RatzzR Offline
            Ratzz
            wrote on last edited by Ratzz
            #18

            @marvic_39 said:
            But Non static data member initializers available only for GCC >4.7 . Check this . Check the GCC support docs.

            --Alles ist gut.

            M 1 Reply Last reply
            1
            • RatzzR Ratzz

              @marvic_39 said:
              But Non static data member initializers available only for GCC >4.7 . Check this . Check the GCC support docs.

              M Offline
              M Offline
              marvic_39
              wrote on last edited by
              #19

              @Ratzz

              Thank you, Ok, Will check with updated GCC version greater than 4.7.

              1 Reply Last reply
              0
              • RatzzR Ratzz

                @hskoglund
                What is your GCC version ? less than 4.7?

                M Offline
                M Offline
                marvic_39
                wrote on last edited by
                #20

                @Ratzz

                Installed, Still flashing errors.

                gcc (Ubuntu/Linaro 4.7.3-2ubuntu1~12.04) 4.7.3
                
                108   QString settingsFile("Hello");
                109   QString str="/neet/one.json";
                
                /home/cpp/app.h:108: error: expected identifier before string constant
                /home/cpp/app.h:108: error: expected ',' or '...' before string constant
                
                /home//cpp/app.h:109: sorry, unimplemented: non-static data member initializers
                /home/cpp/app.h:109: error: in-class initialization of static data member 'str' of non-literal type
                

                In QT creator it show this, is this correct.

                Qt Creator 3.5.1 (opensource)
                Based on Qt 5.5.1 (GCC 4.9.1 20140922 (Red Hat 4.9.1-10), 32 bit)

                Built on Oct 13 2015 07:38:32

                RatzzR 1 Reply Last reply
                0
                • M marvic_39

                  @Ratzz

                  Installed, Still flashing errors.

                  gcc (Ubuntu/Linaro 4.7.3-2ubuntu1~12.04) 4.7.3
                  
                  108   QString settingsFile("Hello");
                  109   QString str="/neet/one.json";
                  
                  /home/cpp/app.h:108: error: expected identifier before string constant
                  /home/cpp/app.h:108: error: expected ',' or '...' before string constant
                  
                  /home//cpp/app.h:109: sorry, unimplemented: non-static data member initializers
                  /home/cpp/app.h:109: error: in-class initialization of static data member 'str' of non-literal type
                  

                  In QT creator it show this, is this correct.

                  Qt Creator 3.5.1 (opensource)
                  Based on Qt 5.5.1 (GCC 4.9.1 20140922 (Red Hat 4.9.1-10), 32 bit)

                  Built on Oct 13 2015 07:38:32

                  RatzzR Offline
                  RatzzR Offline
                  Ratzz
                  wrote on last edited by Ratzz
                  #21

                  @marvic_39
                  Are you doing this inside the structure? QString settingsFile("Hello");
                  Is the error at line 108 bec of this ?

                  --Alles ist gut.

                  M 1 Reply Last reply
                  0
                  • RatzzR Ratzz

                    @marvic_39
                    Are you doing this inside the structure? QString settingsFile("Hello");
                    Is the error at line 108 bec of this ?

                    M Offline
                    M Offline
                    marvic_39
                    wrote on last edited by marvic_39
                    #22

                    @Ratzz

                    I cleaned all GCC versions and activated 4.7
                    Now it's compiled and executed my app.

                    QString settingsFile{"neet/One.json"};
                    

                    Very strange about the brackets () and {}

                    Thank You guys, it's GCC 4.7 made the difference.

                    RatzzR 1 Reply Last reply
                    0
                    • M marvic_39

                      @Ratzz

                      I cleaned all GCC versions and activated 4.7
                      Now it's compiled and executed my app.

                      QString settingsFile{"neet/One.json"};
                      

                      Very strange about the brackets () and {}

                      Thank You guys, it's GCC 4.7 made the difference.

                      RatzzR Offline
                      RatzzR Offline
                      Ratzz
                      wrote on last edited by
                      #23

                      @marvic_39
                      Once your problem is solved please use the Topic Tools button to mark as Solved.
                      Thank you!

                      --Alles ist gut.

                      1 Reply Last reply
                      0
                      • kshegunovK Offline
                        kshegunovK Offline
                        kshegunov
                        Moderators
                        wrote on last edited by
                        #24

                        Ok. I think I get what your problem was. In all probability C++11 is enabled by default in GCC 4.7 (on your distribution), that is why I asked what compiler and environment you're using. Here is the relevant link:
                        http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2008/n2756.htm
                        That being said, without the non-static data member initializers supported by the compiler you are obliged to initialize the object in your class' constructor and cannot do it in its declaration. Meaning that if you compile the code on another platform and/or compiler that does not have the C++11 standard enabled you'll get similar errors.

                        Read and abide by the Qt Code of Conduct

                        1 Reply Last reply
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