[jll29]

This library is nicely concise, and the code is mostly readable (although there are some non-obvious tricks that could be better documented).

The Makefile could need some work:

  json_test.cpp:360:23: warning: missing terminating '"' character [-Winvalid-pp-token]
  { Json::success, R"({
                        ^
  fatal error: too many errors emitted, stopping now [-ferror-limit=]
  9 warnings and 20 errors generated.
  make: *** [json_test.o] Error 1
  % c++ --version                   
  Apple clang version 15.0.0 (clang-1500.1.0.2.5)
  Target: arm64-apple-darwin22.6.0
  Thread model: posix
  InstalledDir: /Library/Developer/CommandLineTools/usr/bin

Compiling direclty with

  c++ --std=c++11 -c json.cpp

works fine, though.