jsoncpp using IStream = std::istream; conflict with WindowsSDK‘s include CommCtrl.h

[biepenghaomie]

jsoncpp using IStream = std::istream; conflict with WindowsSDK‘s include CommCtrl.h

[vassilux]

Hi,
I have the sale issue
Is there a solution for ?

[biepenghaomie]

Hi, I have the sale issue Is there a solution for ?

Of cause.
You can use other name to replace 'IStream' like 'iStream'.
And recompile it.
Luckly,jsoncpp use 'IStream' less.
So you just pay a little time to change all 'IStream' in jsoncpp source code.

[vassilux]

I find soltion to incldue afxole.h before include jsoncpp.h and it works
thanks

[BillyDonahue]

What's the nature of the conflict?
If it's macros, then I would recommend isolating the windows header inclusion into a wrapper .cpp file. Only include it off to the side, where it can do less damage to other headers like jsoncpp's headers.

[biepenghaomie]

What's the nature of the conflict? If it's macros, then I would recommend isolating the windows header inclusion into a wrapper .cpp file. Only include it off to the side, where it can do less damage to other headers like jsoncpp's headers.

Windows header CommCtrl.h has a struct declare which name is IStream in the header.
So it make the conflict between windows header and jsoncpp.

[BillyDonahue]

But jsoncpp defines a Json::IStream, so it's in the Json namespace.

jsoncpp/include/json/config.h

Line 139 in 69098a1

using IStream = std::istream;

This sounds like the conflict is happening due to the user code breaking the separation between namespaces?

Perhaps the user code has using namespace Json; directives or similar usage? If so, just don't do that.

I would like to see a repro and to see what the compiler's actual error message is.

[biepenghaomie]

But jsoncpp defines a Json::IStream, so it's in the Json namespace.

jsoncpp/include/json/config.h

Line 139 in 69098a1

using IStream = std::istream;

This sounds like the conflict is happening due to the user code breaking the separation between namespaces?

Perhaps the user code has using namespace Json; directives or similar usage? If so, just don't do that.

I would like to see a repro and to see what the compiler's actual error message is.

You're right.
Thanks for your reminder.
I overlooked this issue at the time.