Niels Lohmann 6ae17630a4 Reject integral keys for contains(), find(), and count() at compile time (#5705) ...

j.contains(0), j.find(0), and j.count(0) used to compile: the literal 0 is
a null pointer constant, so it converts to a null const char*, and the
overloads taking const typename object_t::key_type& accepted it by
constructing a std::string from that null pointer, which is undefined
behavior (a crash with both libc++ and libstdc++). value(0, default_value)
had the same problem in C++11, where the object comparator is not
transparent.

Add deleted overloads for integral arguments to contains(), find()
(const and non-const), count(), and value() so that these calls are
compile errors in every supported language mode instead of crashing.
Calls with string, string_view, json_pointer, and size-typed element
access (at(), operator[](), erase()) are unaffected.

Fixes #5657.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

2026-09-30 20:07:45 +02:00

..

fuzzer-driver_afl.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

fuzzer-parse_bjdata.cpp

Check the fuzzers' UBJSON/BJData round-trip invariants in the unit tests (#5569)

2026-09-25 08:29:02 +02:00

fuzzer-parse_bon8.cpp

Add BON8 support (#2998)

2026-09-27 16:56:21 +02:00

fuzzer-parse_bson.cpp

Refuse to build the fuzzer drivers with NDEBUG (#5562)

2026-09-24 17:02:57 +02:00

fuzzer-parse_cbor.cpp

Refuse to build the fuzzer drivers with NDEBUG (#5562)

2026-09-24 17:02:57 +02:00

fuzzer-parse_json.cpp

Refuse to build the fuzzer drivers with NDEBUG (#5562)

2026-09-24 17:02:57 +02:00

fuzzer-parse_msgpack.cpp

Refuse to build the fuzzer drivers with NDEBUG (#5562)

2026-09-24 17:02:57 +02:00

fuzzer-parse_ubjson.cpp

Check the fuzzers' UBJSON/BJData round-trip invariants in the unit tests (#5569)

2026-09-25 08:29:02 +02:00

make_test_data_available.hpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

round_trip_corpus.hpp

Check the fuzzers' UBJSON/BJData round-trip invariants in the unit tests (#5569)

2026-09-25 08:29:02 +02:00

skip_library_version_check.cpp

Test suite: cover untested macro configs, std::formatter branches, patch_inplace, and fix a duplicate TEST_CASE name (#5492)

2026-09-16 20:15:46 +02:00

test_utils.hpp

Cut test suite runtime in binary roundtrips and integer sweeps (#5519)

2026-09-27 14:28:38 +02:00

unit-32bit.cpp

reject CBOR array/map length equal to the indefinite-length marker (#5274)

2026-07-31 18:04:30 +02:00

unit-algorithms.cpp

🔒 fix security findings (#5245)

2026-07-08 16:40:58 +02:00

unit-allocator.cpp

Add tests for uncovered code paths (#5581)

2026-09-27 14:19:22 +02:00

unit-alt-string.cpp

Fix NLOHMANN_JSON_SERIALIZE_ENUM_STRICT's from_json message (#5698)

2026-09-30 20:07:29 +02:00

unit-assert_macro.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-binary_formats.cpp

Add BON8 support (#2998)

2026-09-27 16:56:21 +02:00

unit-binary_writer_sinks.cpp

Add BON8 support (#2998)

2026-09-27 16:56:21 +02:00

unit-bjdata.cpp

Cut test suite runtime in binary roundtrips and integer sweeps (#5519)

2026-09-27 14:28:38 +02:00

unit-bon8.cpp

Add BON8 support (#2998)

2026-09-27 16:56:21 +02:00

unit-brace-init-copy-semantics.cpp

Test JSON_BRACE_INIT_COPY_SEMANTICS for real, and fix one-element tuples under it (#5544)

2026-09-24 17:05:37 +02:00

unit-bson.cpp

Move to_bson's binary subtype check into calc_bson_sizes (#5703)

2026-09-30 20:07:41 +02:00

unit-byte_container_with_subtype.cpp

Test suite: cover untested macro configs, std::formatter branches, patch_inplace, and fix a duplicate TEST_CASE name (#5492)

2026-09-16 20:15:46 +02:00

unit-capacity.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-cbor.cpp

Name the key type when rejecting non-string CBOR/MessagePack map keys (#5594)

2026-09-28 17:51:07 +02:00

unit-class_const_iterator.cpp

Add tests for uncovered code paths (#5581)

2026-09-27 14:19:22 +02:00

unit-class_iterator.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-class_lexer.cpp

Convert floats with Eisel-Lemire when std::from_chars is unavailable (#5617)

2026-09-30 20:06:26 +02:00

unit-class_parser.cpp

Trim the compiler-appended NUL from wide/UTF string literals too (#5702)

2026-09-30 20:07:37 +02:00

unit-comparison.cpp

Compare unordered objects by key below the nesting bound (#5582)

2026-09-27 14:21:58 +02:00

unit-concepts.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-constructor1.cpp

Fix #3868: Remove operator!= to enable P2468R2 rewritten candidate synthesis (#5253)

2026-07-09 20:38:39 +02:00

unit-constructor2.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-convenience.cpp

Stop dump() from heap-allocating its output adapter per call (#5449)

2026-09-11 08:22:50 +02:00

unit-conversions.cpp

Fix NLOHMANN_JSON_SERIALIZE_ENUM_STRICT's from_json message (#5698)

2026-09-30 20:07:29 +02:00

unit-custom-array-type.cpp

Copy values before inserting an initializer list into an array (#5693)

2026-09-30 20:07:16 +02:00

unit-custom-base-class.cpp

Exchange the CustomBaseClass subobject in basic_json::swap() (#5697)

2026-09-30 20:07:24 +02:00

unit-custom-binary-type.cpp

Add BON8 support (#2998)

2026-09-27 16:56:21 +02:00

unit-custom-object-type.cpp

Add BON8 support (#2998)

2026-09-27 16:56:21 +02:00

unit-deserialization.cpp

Fix std::terminate and null pointer access in input_stream_adapter (#5699)

2026-09-30 20:07:33 +02:00

unit-diagnostic-positions.cpp

Add tests for uncovered code paths (#5581)

2026-09-27 14:19:22 +02:00

unit-diagnostics.cpp

Move to_bson's binary subtype check into calc_bson_sizes (#5703)

2026-09-30 20:07:41 +02:00

unit-disabled_exceptions.cpp

Move instead of deep-copy ordered_json values when an object grows (#5609)

2026-09-30 20:06:34 +02:00

unit-element_access1.cpp

Throw std::length_error for operator[](SIZE_MAX) instead of corrupting the array (#5687)

2026-09-30 20:07:06 +02:00

unit-element_access2.cpp

Reject integral keys for contains(), find(), and count() at compile time (#5705)

2026-09-30 20:07:45 +02:00

unit-explicit_instantiation.cpp

Add BON8 support (#2998)

2026-09-27 16:56:21 +02:00

unit-format-as.cpp

Add std::format and fmt support (#5224)

2026-07-02 15:59:36 +02:00

unit-hash.cpp

Hash deeply nested values without recursing per nesting level (#5546)

2026-09-24 17:12:02 +02:00

unit-inspection.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-items-cpp17.cpp

Reduce test-suite compile time: extract tiny per-standard test content; drop redundant legacy-comparison CI job (#5481)

2026-09-09 09:52:58 +02:00

unit-items.cpp

Reduce test-suite compile time: extract tiny per-standard test content; drop redundant legacy-comparison CI job (#5481)

2026-09-09 09:52:58 +02:00

unit-iterators1.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-iterators2.cpp

Fix #3868: Remove operator!= to enable P2468R2 rewritten candidate synthesis (#5253)

2026-07-09 20:38:39 +02:00

unit-iterators3.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-json_patch.cpp

Take diff()'s fast path unless the object type reorders members (#5691)

2026-09-30 20:07:10 +02:00

unit-json_pointer.cpp

Fix deprecated json_pointer/string operator== warning in value() (#5683)

2026-09-30 20:06:59 +02:00

unit-large_json.cpp

Cut test suite runtime in binary roundtrips and integer sweeps (#5519)

2026-09-27 14:28:38 +02:00

unit-locale-cpp.cpp

Fix CI: clang-tidy and GCC -Wnoexcept in the locale test (#5613)

2026-09-28 22:20:43 +02:00

unit-merge_patch.cpp

Add tests for uncovered code paths (#5581)

2026-09-27 14:19:22 +02:00

unit-meta.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-modifiers.cpp

Copy values before inserting an initializer list into an array (#5693)

2026-09-30 20:07:16 +02:00

unit-msgpack.cpp

Fix to_msgpack() reading the inactive number union member (#5694)

2026-09-30 20:07:19 +02:00

unit-no_io_and_user_exceptions.cpp

Test suite: cover untested macro configs, std::formatter branches, patch_inplace, and fix a duplicate TEST_CASE name (#5492)

2026-09-16 20:15:46 +02:00

unit-no-macro-leak.cpp

Undefine the four JSON_HEDLEY_* macros that leak after including json.hpp (#5475)

2026-09-09 09:48:17 +02:00

unit-no-mem-leak-on-adl-serialize.cpp

Test suite: cover untested macro configs, std::formatter branches, patch_inplace, and fix a duplicate TEST_CASE name (#5492)

2026-09-16 20:15:46 +02:00

unit-noexcept.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-ordered_json2.cpp

Add BON8 support (#2998)

2026-09-27 16:56:21 +02:00

unit-ordered_json.cpp

Fix stack overflow when copying a deeply nested value (#5387) (#5389)

2026-09-24 17:01:15 +02:00

unit-ordered_map.cpp

Move instead of deep-copy ordered_json values when an object grows (#5609)

2026-09-30 20:06:34 +02:00

unit-pointer_access.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-precise-stream-position.cpp

Fix std::terminate and null pointer access in input_stream_adapter (#5699)

2026-09-30 20:07:33 +02:00

unit-readme.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-reference_access.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-regression1.cpp

Name the key type when rejecting non-string CBOR/MessagePack map keys (#5594)

2026-09-28 17:51:07 +02:00

unit-regression2.cpp

Add BON8 support (#2998)

2026-09-27 16:56:21 +02:00

unit-regression3.cpp

Add BON8 support (#2998)

2026-09-27 16:56:21 +02:00

unit-serialization.cpp

Add tests for uncovered code paths (#5581)

2026-09-27 14:19:22 +02:00

unit-std-format.cpp

Add tests for uncovered code paths (#5581)

2026-09-27 14:19:22 +02:00

unit-testsuites.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-to_chars.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-type_traits.cpp

avoid sign extension in char_traits<signed char>::to_int_type (#5336)

2026-08-03 08:35:53 +02:00

unit-ubjson.cpp

Cut test suite runtime in binary roundtrips and integer sweeps (#5519)

2026-09-27 14:28:38 +02:00

unit-udl.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-udt_macro.cpp

Support zero-member types in NLOHMANN_DEFINE_TYPE_* macros (#4041) (#5272)

2026-09-25 20:44:30 +02:00

unit-udt.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-unicode1.cpp

Broaden JSON_HEDLEY_WARN_UNUSED_RESULT coverage to pure query functions (#5477)

2026-09-09 09:50:39 +02:00

unit-unicode2.cpp

Broaden JSON_HEDLEY_WARN_UNUSED_RESULT coverage to pure query functions (#5477)

2026-09-09 09:50:39 +02:00

unit-unicode3.cpp

Fix dead ill-formed-fourth-byte UTF-8 test sections (byte3/byte4 typo) (#5499)

2026-09-16 20:16:43 +02:00

unit-unicode4.cpp

Fix dead ill-formed-fourth-byte UTF-8 test sections (byte3/byte4 typo) (#5499)

2026-09-16 20:16:43 +02:00

unit-unicode5.cpp

Fix dead ill-formed-fourth-byte UTF-8 test sections (byte3/byte4 typo) (#5499)

2026-09-16 20:16:43 +02:00

unit-user_defined_input.cpp

Speed up parsing of contiguous input (numbers, strings, UTF-8) (#5283)

2026-09-10 17:20:48 +02:00

unit-windows_h.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

unit-wstring.cpp

Add tests for uncovered code paths (#5581)

2026-09-27 14:19:22 +02:00

unit.cpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00