Why no std::byte in qt?!!
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@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.
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@Engelard said in Why no std::byte in qt?!!:
qt betrayed me
Sorry, but before complaining about Qt you should check what std::byte actually is.
As @kenchan said std::byte is part of C++ standard library (as everything in std namespace).
Furthermore std::byte is part of C++17 standard, that means: you need a C++ compiler supporting C++17.
See https://en.cppreference.com/w/cpp/types/byte
What compiler do you use?
This problem is completely unrelated to Qt. -
@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.
@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?
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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).
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@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?
@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. -
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).
@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',
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@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.@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?:
And then. Where and for what exactly file should i looking at? Can i add same compiler from my VS2017?
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@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?:
And then. Where and for what exactly file should i looking at? Can i add same compiler from my VS2017?
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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:
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?
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
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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:
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?
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
@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.
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@VRonin I just added first manual compiler, which from folder of my VS2017 Community, still it says that byte is not part of std.
Here it is:
Did i did that correct?
@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?
- Did you
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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:
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?
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
@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
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@Engelard said in Why no std::byte in qt?!!:
CONFIG += c++17
QMAKE_CXXFLAGS += -std:c++17Please try
CONFIG +=c++1z
This works for me with Visual Studio 2017 compiler.
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@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.
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@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?
@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).
This is the CPU instruction set. Intel processors use amd64, so it's correct.
lol
- Did you
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@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.
@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++17Please 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.
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@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.
@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:
