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Speed up container destruction, iterator access and diff()

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Signed-off-by: Niels Lohmann <mail@nlohmann.me>
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Niels Lohmann committed 2026-10-15 11:46:52 +02:00
1 parent 0570c5b06b
commit 8b2d29f28b
6 files changed
+662 -504
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tests/src/unit-constructor2.cpp
+54
View File
@@ -323,3 +323,57 @@ TEST_CASE("copy constructor and destructor across value types")
CHECK(w.size() == 9);
}
}
TEST_CASE_TEMPLATE("destructor of nested containers", Json, nlohmann::json, nlohmann::ordered_json)
{
SECTION("empty containers")
{
{
Json j = Json::array();
}
{
Json j = Json::object();
}
{
Json j = Json::array({Json::array(), Json::object(), Json::array({Json::array()})});
}
}
SECTION("leaves mixed with nested containers")
{
Json j = Json::object();
j["leaf"] = 1;
j["str"] = "text";
j["empty_a"] = Json::array();
j["empty_o"] = Json::object();
j["arr"] = Json::array({1, "a", Json::array({1, 2}), Json::object({{"k", Json::array({Json::object()})}}), nullptr});
j["obj"] = Json::object({{"x", Json::object({{"y", Json::array({1, Json::object({{"z", 1}})})}})}, {"w", 2}});
Json copy = j;
CHECK(copy == j);
j = Json::array({std::move(copy), j, 3, Json::array()});
}
SECTION("deep nesting")
{
for (int kind = 0; kind < 3; ++kind)
{
Json j = 1;
for (int i = 0; i < 5000; ++i)
{
switch (kind)
{
case 0:
j = Json::array({std::move(j)});
break;
case 1:
j = Json::object({{"k", std::move(j)}});
break;
default:
// siblings next to the nested child
j = (i % 2 == 0) ? Json::array({1, Json::array(), std::move(j)}) : Json::object({{"a", 1}, {"b", Json::object()}, {"c", std::move(j)}});
break;
}
}
}
}
}