Florian Albrechtskirchinger d909f80960

Add versioned, ABI-tagged inline namespace and namespace macros (#3590 )

* Add versioned inline namespace

Add a versioned inline namespace to prevent ABI issues when linking code
using multiple library versions.

* Add namespace macros

* Encode ABI information in inline namespace

Add _diag suffix to inline namespace if JSON_DIAGNOSTICS is enabled, and
_ldvcmp suffix if JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON is enabled.

* Move ABI-affecting macros into abi_macros.hpp

* Move std_fs namespace definition into std_fs.hpp

* Remove std_fs namespace from unit test

* Format more files in tests directory

* Add unit tests

* Update documentation

* Fix GDB pretty printer

* fixup! Add namespace macros

* Derive ABI prefix from NLOHMANN_JSON_VERSION_*

2022-07-30 21:59:13 +02:00

2.7 KiB

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GDB Pretty Printer

File nlohmann-json.py contains a pretty printer for GDB for JSON values of this library. It was originally published as Gist by Hannes Domani.

How to use

Add line
```
source /path/to/nlohmann-json.py
```
to ~/.gdbinit. Note you must replace /path/to with whatever path you stored file nlohmann-json.py.

In GDB, debug as usual. When you want to pretty-print a JSON value var, type

p -pretty on -array on -- var

The result should look like

  $1 = std::map with 5 elements = {
      ["Baptiste"] = std::map with 1 element = {
          ["first"] = "second"
      },
      ["Emmanuel"] = std::vector of length 3, capacity 3 = {
          3,
          "25",
          0.5
      },
      ["Jean"] = 0.7,
      ["Zorg"] = std::map with 8 elements = {
          ["array"] = std::vector of length 3, capacity 3 = {
              1,
              0,
              2
          },
          ["awesome_str"] = "bleh",
          ["bool"] = true,
          ["flex"] = 0.2,
          ["float"] = 5.22,
          ["int"] = 5,
          ["nested"] = std::map with 1 element = {
              ["bar"] = "barz"
          },
          ["trap "] = "you fell"
      },
      ["empty"] = nlohmann::detail::value_t::null
  }

Requires Python 3.9+. Last tested with GDB 12.1. See #1952 for more information. Please post questions there.

Copyright

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

2.7 KiB Raw Blame History

GDB Pretty Printer

How to use

Copyright

2.7 KiB

Raw Blame History