Compilation issues when included in project

[prithvisb]

• What is the issue you have?
  When I include the file "json.hpp" in my source code I get the following error(s)

/inc/json.hpp:32:35: error: stray '\302' in program

<title>json/json.hpp at develop · nlohmann/json · GitHub</title> \ inc/json.hpp:360:76: error: stray '\206' in program ↵ \ inc/json.hpp:1067:70: error: stray '#' in program #define NLOHMANN_JSON_VERSION_PATCH 3

"json.hpp:33275:189: error: expected unqualified-id before '<' token
#include <vector> // vector"

<this follows for virtually every line of the header>

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

#include "json.hpp"

<my code that does not use any json features yet>

• What is the expected behavior?

That the code should compile

• And what is the actual behavior instead?
  Several pages of compile errors

• Which compiler and operating system are you using? Is it a supported compiler?
  -- The C compiler identification is GNU 8.3.1
  -- The CXX compiler identification is GNU 8.3.1
  OS - macos but the compilation is happening while building a centos 7 docker image.

I use Cmake and have SET(CMAKE_CXX_STANDARD 17)

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

[nlohmann]

Can you make sure the file is exactly the one from the release? It seems that the stray may have been introduced by copy/pasting (see https://arduino.stackexchange.com/questions/30581/stray-302-in-program-error-when-compiling for example). Can you attach the json.hpp you are using?

[prithvisb]

I think that's probably it. The errors don't correspond to the line numbers in any meaningful way. I copied the file directly from the include.zip file and still have the same issue. I'm looking online if this is a macos problem but I don't understand why copying the file directly is not helping.

Is there an encoding issue in the source? I tried saving in vi with :set nobomb, I opened and saved the file in xcode
json.hpp.zip

I've attached what I'm currently using.

[nlohmann]

I am using macOS myself and never had such problems. I could also see no encoding issue in the attached file. If there was a BOM, then the error should be directly in the first characters. Very strange issue.

[prithvisb]

I'm closing this issue. I did a split diff of the file and found a lot of weird characters. Very long story short I had a process that was trampling on json.hpp in the background. I killed that process and re-downloaded your file and everything works. User error. Sorry for the trouble and thanks for the help!

[felixcrazzolara]

I had a similar issue when I downloaded the header file with wget. Copying the file out of the zip folder instead, solved the issue.