Compile error. Unable convert form nullptr to nullptr&&

[kirill-782]

I can not compile json.hpp.

error C2664: "BasicJsonType *nlohmann::detail::json_sax_dom_parser::handle_value(Value &&)": невозможно преобразовать аргумент 1 из "nullptr" в "nullptr &&"

problem code:

    bool null() override
    {
        handle_value(nullptr); 
        return true;
    }

[nlohmann]

What code do you try to compile? Which compiler are you using? What version of the library are you using?

[kirill-782]

visual studio 2015 (vc140). library downloaded from develop branch (last version)

#include <nlohmann/json.hpp> // single include

using namespace std;

using json = nlohmann::json;

int main( void )
{
	json j = "{ \"happy\": true, \"pi\": 3.141 }"_json;
	return 0;
}

[nlohmann]

Is that compiler supported? From the README: Microsoft Visual C++ 2015 / Build Tools 14.0.25123.0 (and possibly later)

[kirill-782]

Microsoft Visual Studio Enterprise 2015
Версия 14.0.25431.01 Update 3
Microsoft .NET Framework
Версия 4.7.03056

[nlohmann]

Could you try to remove using namespace std?

[kirill-782]

Nothing has changed

[nlohmann]

That is strange as we use MSVC 2015 with AppVeyor in your CI suite.

[kirill-782]

Can any macro be defined? Or any compilation option? Can you sln the file?

[nlohmann]

Maybe related: #987.

[nlohmann]

Can any macro be defined? Or any compilation option? Can you sln the file?

What do you mean by that?

[nlohmann]

@kirill-782 Could you comment on #1135 (comment) ?

[kirill-782]

I'm interested in Build Tools. 140 or 141?

[nlohmann]

AppVeyor uses Microsoft (R) Build Engine version 14.0.25420.1, MSVC 19.0.24215.1. What do you mean?

[kirill-782]

It is very strange.

[nlohmann]

I don't know how to proceed here. To summarize, it seems as if you are using the exact compiler version as we are doing on AppVeyor. Could you make sure that you run the exact same commands as here?

[kirill-782]

The problem was solved by disabling the CRL in the compiler settings

[nlohmann]

Thanks for checking back!