json/tests/abi/diag/diag.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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#include "doctest_compatibility.h"
#include "diag.hpp"
TEST_CASE("ABI compatible diagnostics")
{
SECTION("basic_json size")
{
// basic_json with diagnostics is larger because of added data members
CHECK(json_sizeof_diag_on() == json_sizeof_diag_on_explicit());
CHECK(json_sizeof_diag_off() == json_sizeof_diag_off_explicit());
CHECK(json_sizeof_diag_on() > json_sizeof_diag_off());
}
SECTION("basic_json at")
{
// accessing a nonexistent key throws different exception with diagnostics
CHECK_THROWS_WITH(json_at_diag_on(), "[json.exception.out_of_range.403] (/foo) key 'bar' not found");
CHECK_THROWS_WITH(json_at_diag_off(), "[json.exception.out_of_range.403] key 'bar' not found");
}
}