basic_json has no member "parse"

[Ruud-cb]

• What is the issue you have?

Copied the json.hpp file (v3.7.0) from release into my C++ project, the IDE (VS2019) instantly reports problems with 2 issues:

class "nlohmann:basic_json<std::map, std::vector, std::string, bool, int64_t, uint64_t, double, std::allocator, nlohmann:adl_serializer>" has no member "parse".

https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json.hpp#L22516

And one error I am a little bit less concerned about because I don't need it to parse a json:

class "nlohmann:basic_json<std::map, std::vector, std::string, bool, int64_t, uint64_t, double, std::allocator, nlohmann:adl_serializer>" has no member "swap".

https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json.hpp#L22495

• Please describe the steps to reproduce the issue. Can you provide a small but working code example?

1. Create a new C++ Dynamic Link Library Project in VS2019
2. Add json.hpp
3. See errors

• Which compiler and operating system are you using? Is it a supported compiler?

Visual Studio 2019 (v142)
Also tried Visual Studio 2017 (v141) but that even gave me more issues.

• Did you use a released version of the library or the version from the develop branch?

• If you experience a compilation error: can you compile and run the unit tests?

FYI: I am a C++ noob

[t-b]

See https://nlohmann.github.io/json/classnlohmann_1_1basic__json_a265a473e939184aa42655c9ccdf34e58.html#a265a473e939184aa42655c9ccdf34e58 for an example how to use the static parse method.

[kyeonghopark]

It seems just an error from Visual Studio IntelliSense, not an actual compiler.
Maybe a bug of IntelliSense?

[F0bes]

Visual Studio 2019 (16.2.5) suffers from the same IntelliSense bug, hoping for a fix soon.

[nlohmann]

As the issue is not related to the library, but rather IntelliSense, I'm closing the issue.

[asfarley]

For anyone still running into this, there's a workaround available. Add the following flag to 'Additional Options' under your project's Configuration Properties -> C/C++ -> Command Line options.

Zc:__cplusplus

[monkey0506]

For anyone still running into this, there's a workaround available. Add the following flag to 'Additional Options' under your project's Configuration Properties -> C/C++ -> Command Line options.

I'm absolutely floored by the fact that this simple compiler switch actually makes IntelliSense play nicely with complex template code. It's much more pleasant than what I was doing before (stubbing the entire API inside of #ifdef __INTELLISENSE__ blocks).