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Allow SAX parsing of tagged CBOR (#5740)

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* Allow SAX parsing of tagged CBOR

Signed-off-by: Tyagiquamar <mohdquamartyagi@gmail.com>

* Consolidate sax_parse overloads with default tag_handler parameter

Signed-off-by: Tyagiquamar <mohdquamartyagi@gmail.com>

* Add version history entry for tag_handler in sax_parse documentation

---------

Signed-off-by: Tyagiquamar <mohdquamartyagi@gmail.com>
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Co-authored-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Mohd Quamar TyagiandNiels Lohmann authored and GitHub committed 2026-10-07 07:38:24 +02:00
1 parent 21a69230bd
commit 675e519966
4 files changed
+61 -11
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tests/src/unit-regression3.cpp
+40
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@@ -862,6 +862,46 @@ TEST_CASE("issue #5338 - truncated CBOR tagged binary subtype is rejected")
}
}
TEST_CASE("issue #5676 - SAX parsing of CBOR tags")
{
const json expected = json::binary({1, 2, 3}, 42);
const auto cbor = json::to_cbor(expected);
nlohmann::detail::json_sax_acceptor<json> acceptor;
CHECK_FALSE(json::sax_parse(cbor, &acceptor, json::input_format_t::cbor));
CHECK_FALSE(json::sax_parse(cbor, &acceptor, json::input_format_t::cbor,
true, false, false, json::cbor_tag_handler_t::error));
CHECK(json::sax_parse(cbor, &acceptor, json::input_format_t::cbor,
true, false, false, json::cbor_tag_handler_t::ignore));
json parsed;
nlohmann::detail::json_sax_dom_parser<json, nlohmann::detail::string_input_adapter_type> sax(parsed);
CHECK(json::sax_parse(cbor, &sax, json::input_format_t::cbor,
true, false, false, json::cbor_tag_handler_t::store));
CHECK(parsed == expected);
json iterator_parsed;
nlohmann::detail::json_sax_dom_parser<json, nlohmann::detail::string_input_adapter_type> iterator_sax(iterator_parsed);
CHECK(json::sax_parse(cbor.begin(), cbor.end(), &iterator_sax, json::input_format_t::cbor,
true, false, false, json::cbor_tag_handler_t::store));
CHECK(iterator_parsed == expected);
json span_parsed;
nlohmann::detail::json_sax_dom_parser<json, nlohmann::detail::string_input_adapter_type> span_sax(span_parsed);
CHECK(json::sax_parse(nlohmann::detail::span_input_adapter(cbor.data(), cbor.size()), &span_sax,
json::input_format_t::cbor, true, false, false, json::cbor_tag_handler_t::store));
CHECK(span_parsed == expected);
const std::string text = "null";
CHECK(json::sax_parse(text, &acceptor, json::input_format_t::json,
true, false, false, json::cbor_tag_handler_t::store));
CHECK(json::sax_parse(text.begin(), text.end(), &acceptor, json::input_format_t::json,
true, false, false, json::cbor_tag_handler_t::store));
CHECK(json::sax_parse(nlohmann::detail::span_input_adapter(text.data(), text.size()), &acceptor,
json::input_format_t::json, true, false, false, json::cbor_tag_handler_t::store));
}
TEST_CASE("issue #5402 - update(merge_objects=true) overwrites a primitive with an object")
{
json t = {{"k", 1}};