_json operator""()

[boris-999]

Description

had some issues with operator"" _json namespacing. added the #define as per docs: https://json.nlohmann.me/api/operator_literal_json/ then there was an issue with #if JSON_USE_GLOBAL_UDLS not making any sense. should that be #ifdef ?

Reproduction steps

1. #define JSON_USE_GLOBAL_UDLS
2. #if JSON_USE_GLOBAL_UDLS causes compiler error

Expected vs. actual results

probaly should be #ifdef, not #if

Minimal code example

No response

Error messages

No response

Compiler and operating system

msvc 2019 - 16.11.17 (current as of 2022-08-02)

Library version

3.11.0

Validation

• The bug also occurs if the latest version from the develop branch is used.
• I can successfully compile and run the unit tests.

[falbrechtskirchinger]

This line in the documentation should probably read:

Alternatively, define JSON_USE_GLOBAL_UDLS to 1 to make them available in the global namespace.

That is, please use #define JSON_USE_GLOBAL_UDLS 1. That is the default, though. Can you elaborate on what your problem is and how I might reproduce it?

[gregmarr]

The default is to have that defined to 1. Define it to 0 if you want to disable the default behavior:

https://json.nlohmann.me/api/macros/json_use_global_udls/

@falbrechtskirchinger Maybe this line is left over from before it was the default:

https://json.nlohmann.me/api/operator_literal_json/
Alternatively, define JSON_USE_GLOBAL_UDLS to make them available in the global namespace.

[falbrechtskirchinger]

We clearly had the same thought. :-)

I'll make a note of the documentation issue.

[gregmarr]

@falbrechtskirchinger Got here just before me. :)