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nlohmannjson/tests/abi/diag/diag_on.cpp
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

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C++

#undef JSON_DIAGNOSTICS
#define JSON_DIAGNOSTICS 1
#include <nlohmann/json.hpp>
#include "diag.hpp"
std::size_t json_sizeof_diag_on()
{
return sizeof(nlohmann::json);
}
std::size_t json_sizeof_diag_on_explicit()
{
return sizeof(::NLOHMANN_JSON_NAMESPACE::json);
}
void json_at_diag_on()
{
using nlohmann::json;
json j = json{{"foo", json::object()}};
j.at(json::json_pointer("/foo/bar"));
}