Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. Why no std::byte in qt?!!
Forum Updated to NodeBB v4.3 + New Features

Why no std::byte in qt?!!

Scheduled Pinned Locked Moved Solved General and Desktop
31 Posts 8 Posters 9.1k Views 3 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • JohanSoloJ JohanSolo

    @Engelard said in Why no std::byte in qt?!!:

    It works in VS, and not working in Qt. And you telling me that "completely unrelated"? How your argument should work?

    Well, Qt is no compiler... it's a framework. Therefore the argument holds.

    EngelardE Offline
    EngelardE Offline
    Engelard
    wrote on last edited by
    #8

    @JohanSolo said in Why no std::byte in qt?!!:

    Well, Qt is no compiler... it's a framework. Therefore the argument holds.

    I don't understand. Each IDA must have it's own compiler, no?

    K 1 Reply Last reply
    0
    • EngelardE Offline
      EngelardE Offline
      Engelard
      wrote on last edited by Engelard
      #9

      Just tell me what should i do to be able to use std::byte in qt...

      P.S. this topic for some reason became 'auto topic', but this keyword wont work for my case because it can't convert in proper 'raw byte' type because there is no such thing in my Qt(yet).

      VRoninV 1 Reply Last reply
      0
      • EngelardE Engelard

        @JohanSolo said in Why no std::byte in qt?!!:

        Well, Qt is no compiler... it's a framework. Therefore the argument holds.

        I don't understand. Each IDA must have it's own compiler, no?

        K Offline
        K Offline
        kenchan
        wrote on last edited by kenchan
        #10

        @Engelard
        No, the Qt IDE is not a compiler, it provides you with the ability to use whatever compiler you have installed and is compatible with the version of Qt you are using.
        In the case of the VS IDE it just happens to be provided by Microsoft and they also provide their own compiler as part of the package. That is just the way it is!

        If you want to use the c++17 features in Qt Creator you must tell the compiler you want to use it by putting CONFIG += c++17 in your pro file.
        EDIT:
        Another way to make it use the c++17 features is to add QMAKE_CXXFLAGS += -std:c++17 this should be equivalent to the above if you use the correct compiler.
        I think it will only work the the 15.0 compiler, I tried it with the 14.0 compiler and the complier did not like it. I don't use Qt with the 15.0 version yet so I can't test that.

        EngelardE 1 Reply Last reply
        6
        • EngelardE Engelard

          Just tell me what should i do to be able to use std::byte in qt...

          P.S. this topic for some reason became 'auto topic', but this keyword wont work for my case because it can't convert in proper 'raw byte' type because there is no such thing in my Qt(yet).

          VRoninV Offline
          VRoninV Offline
          VRonin
          wrote on last edited by
          #11

          @Engelard said in Why no std::byte in qt?!!:

          what should i do to be able to use std::byte in qt

          Just chose as a compiler VS 2017.3 [P2] or later (i.e. the compiler 15.0)

          Each IDA must have it's own compiler, no?

          Absolutely not.

          this topic for some reason became 'auto topic',

          Forked to https://forum.qt.io/topic/95412/rants-about-auto

          "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
          ~Napoleon Bonaparte

          On a crusade to banish setIndexWidget() from the holy land of Qt

          1 Reply Last reply
          3
          • K kenchan

            @Engelard
            No, the Qt IDE is not a compiler, it provides you with the ability to use whatever compiler you have installed and is compatible with the version of Qt you are using.
            In the case of the VS IDE it just happens to be provided by Microsoft and they also provide their own compiler as part of the package. That is just the way it is!

            If you want to use the c++17 features in Qt Creator you must tell the compiler you want to use it by putting CONFIG += c++17 in your pro file.
            EDIT:
            Another way to make it use the c++17 features is to add QMAKE_CXXFLAGS += -std:c++17 this should be equivalent to the above if you use the correct compiler.
            I think it will only work the the 15.0 compiler, I tried it with the 14.0 compiler and the complier did not like it. I don't use Qt with the 15.0 version yet so I can't test that.

            EngelardE Offline
            EngelardE Offline
            Engelard
            wrote on last edited by
            #12

            @kenchan said in Why no std::byte in qt?!!:

            I think it will only work the the 15.0 compiler, I tried it with the 14.0 compiler and the complier did not like it. I don't use Qt with the 15.0 version yet so I can't test that.

            Did'nt work out((

            @VRonin said in Why no std::byte in qt?!!:

            Just chose as a compiler VS 2017.3 [P2] or later (i.e. the compiler 15.0)

            Which one should i choose?:

            alt text

            And then. Where and for what exactly file should i looking at? Can i add same compiler from my VS2017?

            VRoninV 1 Reply Last reply
            0
            • EngelardE Engelard

              @kenchan said in Why no std::byte in qt?!!:

              I think it will only work the the 15.0 compiler, I tried it with the 14.0 compiler and the complier did not like it. I don't use Qt with the 15.0 version yet so I can't test that.

              Did'nt work out((

              @VRonin said in Why no std::byte in qt?!!:

              Just chose as a compiler VS 2017.3 [P2] or later (i.e. the compiler 15.0)

              Which one should i choose?:

              alt text

              And then. Where and for what exactly file should i looking at? Can i add same compiler from my VS2017?

              VRoninV Offline
              VRoninV Offline
              VRonin
              wrote on last edited by
              #13

              @Engelard said in Why no std::byte in qt?!!:

              Did'nt work out((

              What did you do?

              "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
              ~Napoleon Bonaparte

              On a crusade to banish setIndexWidget() from the holy land of Qt

              EngelardE 1 Reply Last reply
              0
              • VRoninV VRonin

                @Engelard said in Why no std::byte in qt?!!:

                Did'nt work out((

                What did you do?

                EngelardE Offline
                EngelardE Offline
                Engelard
                wrote on last edited by Engelard
                #14

                @VRonin like @kenchan said, add in to .pro file one of these:

                CONFIG += c++17
                QMAKE_CXXFLAGS += -std:c++17
                

                Non of them worked. Still no byte type in std::

                kkoehneK K 2 Replies Last reply
                0
                • VRoninV Offline
                  VRoninV Offline
                  VRonin
                  wrote on last edited by
                  #15

                  Can you show us what kit are you building with? see image below:
                  0_1539108183391_Capture.png

                  "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                  ~Napoleon Bonaparte

                  On a crusade to banish setIndexWidget() from the holy land of Qt

                  EngelardE 1 Reply Last reply
                  0
                  • VRoninV VRonin

                    Can you show us what kit are you building with? see image below:
                    0_1539108183391_Capture.png

                    EngelardE Offline
                    EngelardE Offline
                    Engelard
                    wrote on last edited by
                    #16

                    @VRonin I just added first manual compiler, which from folder of my VS2017 Community, still it says that byte is not part of std.

                    alt text

                    Here it is:

                    alt text

                    Did i did that correct?

                    VRoninV 1 Reply Last reply
                    0
                    • EngelardE Offline
                      EngelardE Offline
                      Engelard
                      wrote on last edited by Engelard
                      #17

                      Oh and in the Kits i just now noticed, for some reason there is compilers for amd chosen, when i have normal for intel i suppose in my VS. And i can't change it, when i press manage - it's simply throw me in to compilers tab so i don't know how to change it:

                      alt text

                      AND. i just now added one more custom compiler, also from VS2017 but 64 version, since i have x64 CPU and windows, maybe should be proper one, am i right?

                      alt text

                      Only one thing (as i understand) left to do. Is apply compiler which i chose in 'compilers' tab, because there is still my old as you can see from screenshot

                      alt text

                      jsulmJ kshegunovK 2 Replies Last reply
                      0
                      • EngelardE Engelard

                        Oh and in the Kits i just now noticed, for some reason there is compilers for amd chosen, when i have normal for intel i suppose in my VS. And i can't change it, when i press manage - it's simply throw me in to compilers tab so i don't know how to change it:

                        alt text

                        AND. i just now added one more custom compiler, also from VS2017 but 64 version, since i have x64 CPU and windows, maybe should be proper one, am i right?

                        alt text

                        Only one thing (as i understand) left to do. Is apply compiler which i chose in 'compilers' tab, because there is still my old as you can see from screenshot

                        alt text

                        jsulmJ Offline
                        jsulmJ Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by jsulm
                        #18

                        @Engelard "How your argument should work?" - easy. You should understand the difference between a compiler, an IDE and a framework. Qt is a C++ framework (not a compiler), QtCreator is an IDE which supports many different compilers, but does not contain own compilers. C++standard library (std::*) comes as part of the compiler and NOT Qt, that's why it is "completely unrelated to Qt". So, as already explained by others you need a compiler supporting C++2017 and activate C++2017 supports in the pro file (not sure it is needed with Microsoft compilers).

                        Didn't QtCreator auto-detect your VS2017 compiler? Usually there is no need to configure compilers manually. The 15.0 is already the C++ compiler from VS2017, why do you add the compiler manually? Does it now work with your "Desktop Qt 5.10.1 MSVC2017 64bit2" Kit and autodetected VS2017 compiler?

                        One note: an IDE does not have to contain any compilers. Microsoft Compilers can be installed and used without Visual Studio. The reasons are: it must be possible to use compilers without a huge IDE (for example in a continuous integration system) and many IDEs (like QtCreator) support different compilers which come from different companies or are open source. QtCreator, for example, supports Microsoft Compilers and MinGW on Windows. Qt Online Installer for Windows provides the possibility to install MinGW as it is Open Source. Microsoft compilers on the other hand can't be provided by Qt Online Installer as this not allowed by Microsoft.

                        https://forum.qt.io/topic/113070/qt-code-of-conduct

                        1 Reply Last reply
                        5
                        • EngelardE Engelard

                          @VRonin I just added first manual compiler, which from folder of my VS2017 Community, still it says that byte is not part of std.

                          alt text

                          Here it is:

                          alt text

                          Did i did that correct?

                          VRoninV Offline
                          VRoninV Offline
                          VRonin
                          wrote on last edited by
                          #19

                          @Engelard said in Why no std::byte in qt?!!:

                          still it says that byte is not part of std.

                          • Did you #include <cstddef>?
                          • Can you open Visual Studio 2017, create a simple console program and test if it works there?

                          "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                          ~Napoleon Bonaparte

                          On a crusade to banish setIndexWidget() from the holy land of Qt

                          EngelardE 1 Reply Last reply
                          1
                          • EngelardE Engelard

                            Oh and in the Kits i just now noticed, for some reason there is compilers for amd chosen, when i have normal for intel i suppose in my VS. And i can't change it, when i press manage - it's simply throw me in to compilers tab so i don't know how to change it:

                            alt text

                            AND. i just now added one more custom compiler, also from VS2017 but 64 version, since i have x64 CPU and windows, maybe should be proper one, am i right?

                            alt text

                            Only one thing (as i understand) left to do. Is apply compiler which i chose in 'compilers' tab, because there is still my old as you can see from screenshot

                            alt text

                            kshegunovK Offline
                            kshegunovK Offline
                            kshegunov
                            Moderators
                            wrote on last edited by
                            #20

                            @Engelard said in Why no std::byte in qt?!!:

                            there is compilers for amd chosen, when i have normal for intel i suppose in my VS

                            This is the CPU instruction set. Intel processors use amd64, so it's correct.

                            Read and abide by the Qt Code of Conduct

                            EngelardE 1 Reply Last reply
                            5
                            • EngelardE Engelard

                              @VRonin like @kenchan said, add in to .pro file one of these:

                              CONFIG += c++17
                              QMAKE_CXXFLAGS += -std:c++17
                              

                              Non of them worked. Still no byte type in std::

                              kkoehneK Offline
                              kkoehneK Offline
                              kkoehne
                              Moderators
                              wrote on last edited by
                              #21

                              @Engelard said in Why no std::byte in qt?!!:

                              CONFIG += c++17
                              QMAKE_CXXFLAGS += -std:c++17

                              Please try

                              CONFIG +=c++1z

                              This works for me with Visual Studio 2017 compiler.

                              Director R&D, The Qt Company

                              1 Reply Last reply
                              2
                              • EngelardE Engelard

                                @VRonin like @kenchan said, add in to .pro file one of these:

                                CONFIG += c++17
                                QMAKE_CXXFLAGS += -std:c++17
                                

                                Non of them worked. Still no byte type in std::

                                K Offline
                                K Offline
                                kenchan
                                wrote on last edited by kenchan
                                #22

                                @Engelard
                                OK, problem solved...
                                In spite the Microsoft docs which say the -std:c++17 flag can be used in VS2017 to enable the c++17 features it does not seem to work though the command line via qmake!
                                but adding...
                                DEFINES += _HAS_STD_BYTE
                                and
                                QMAKE_CXXFLAGS += -std:c++17
                                to the pro file does work and I can use std::byte in the code.

                                QMAKE_CXXFLAGS += -std:c++1z also worked

                                I hope this works for you too.

                                EngelardE 1 Reply Last reply
                                4
                                • VRoninV VRonin

                                  @Engelard said in Why no std::byte in qt?!!:

                                  still it says that byte is not part of std.

                                  • Did you #include <cstddef>?
                                  • Can you open Visual Studio 2017, create a simple console program and test if it works there?
                                  EngelardE Offline
                                  EngelardE Offline
                                  Engelard
                                  wrote on last edited by Engelard
                                  #23

                                  @VRonin said in Why no std::byte in qt?!!:

                                  @Engelard said in Why no std::byte in qt?!!:

                                  still it says that byte is not part of std.

                                  • Did you #include <cstddef>?

                                  Yes, i mentioned in firsts posts.

                                  • Can you open Visual Studio 2017, create a simple console program and test if it works there?

                                  In first post i told that original program which widely using std::byte was from my VS2017(ofc it works).

                                  @kshegunov

                                  This is the CPU instruction set. Intel processors use amd64, so it's correct.

                                  lol

                                  1 Reply Last reply
                                  0
                                  • kshegunovK kshegunov

                                    @Engelard said in Why no std::byte in qt?!!:

                                    there is compilers for amd chosen, when i have normal for intel i suppose in my VS

                                    This is the CPU instruction set. Intel processors use amd64, so it's correct.

                                    EngelardE Offline
                                    EngelardE Offline
                                    Engelard
                                    wrote on last edited by
                                    #24

                                    @kshegunov said in Why no std::byte in qt?!!:

                                    @Engelard said in Why no std::byte in qt?!!:

                                    there is compilers for amd chosen, when i have normal for intel i suppose in my VS

                                    This is the CPU instruction set. Intel processors use amd64, so it's correct.

                                    lol

                                    @kkoehne said in Why no std::byte in qt?!!:

                                    @Engelard said in Why no std::byte in qt?!!:

                                    CONFIG += c++17
                                    QMAKE_CXXFLAGS += -std:c++17

                                    Please try

                                    CONFIG +=c++1z

                                    This works for me with Visual Studio 2017 compiler.

                                    Sorry, no effect. Tried both of them, separately and together like in your message.

                                    1 Reply Last reply
                                    0
                                    • K kenchan

                                      @Engelard
                                      OK, problem solved...
                                      In spite the Microsoft docs which say the -std:c++17 flag can be used in VS2017 to enable the c++17 features it does not seem to work though the command line via qmake!
                                      but adding...
                                      DEFINES += _HAS_STD_BYTE
                                      and
                                      QMAKE_CXXFLAGS += -std:c++17
                                      to the pro file does work and I can use std::byte in the code.

                                      QMAKE_CXXFLAGS += -std:c++1z also worked

                                      I hope this works for you too.

                                      EngelardE Offline
                                      EngelardE Offline
                                      Engelard
                                      wrote on last edited by Engelard
                                      #25

                                      @kenchan damn it worked! At least now after typing std::b it advice me byte type and word now not dead black but violet like all valid variables should be(finally).

                                      But!)

                                      It still rejects to compile. I tried to clean all, then rebuild, but same error:

                                      alt text

                                      1 Reply Last reply
                                      0
                                      • EngelardE Offline
                                        EngelardE Offline
                                        Engelard
                                        wrote on last edited by
                                        #26

                                        Even restart of Qt don't help, what's wrong...

                                        K 1 Reply Last reply
                                        0
                                        • EngelardE Engelard

                                          Even restart of Qt don't help, what's wrong...

                                          K Offline
                                          K Offline
                                          kenchan
                                          wrote on last edited by kenchan
                                          #27

                                          @Engelard
                                          hmm?? looks like you have another problem somewhere.
                                          Can you show us your pro file?
                                          Can you show us a screen shot of your kits panel for the kit you are currently using again please?
                                          Can you show us a screen shot the qt versions panel and the compilers panel again please?
                                          Can can you show a screen shot of the compiler output when you compile your code with the std::byte declaration please?

                                          Thank you

                                          K EngelardE 2 Replies Last reply
                                          1

                                          • Login

                                          • Login or register to search.
                                          • First post
                                            Last post
                                          0
                                          • Categories
                                          • Recent
                                          • Tags
                                          • Popular
                                          • Users
                                          • Groups
                                          • Search
                                          • Get Qt Extensions
                                          • Unsolved