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Change link() to shallowCopy() (issue #1343)

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Instead of storing a pointer, the function copies the `VariantData`.

Benefits:
* smaller code
* no impact on programs that don't use this feature

Drawbacks:
* changes to the original variant are not always reflected on the copy
* modifying the original from the shallow copy leads to UB
This commit is contained in:
Benoit Blanchon
2022-07-05 17:07:43 +02:00
parent 3b3ab8c4e1
commit cd8373ad32
36 changed files with 78 additions and 543 deletions
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44
extras/tests/JsonVariant/createNested.cpp
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@ -18,17 +18,6 @@ TEST_CASE("JsonVariant::createNestedObject()") {
REQUIRE(variant[0]["value"] == 42);
REQUIRE(obj.isNull() == false);
}
SECTION("does nothing on linked array") {
StaticJsonDocument<128> doc2;
doc2[0] = 42;
variant.link(doc2);
variant.createNestedObject();
CHECK(variant.size() == 1);
CHECK(variant[0] == 42);
}
}
TEST_CASE("JsonVariant::createNestedArray()") {
@ -41,17 +30,6 @@ TEST_CASE("JsonVariant::createNestedArray()") {
REQUIRE(variant.is<JsonArray>() == true);
REQUIRE(arr.isNull() == false);
}
SECTION("does nothing on linked array") {
StaticJsonDocument<128> doc2;
doc2[0] = 42;
variant.link(doc2);
variant.createNestedArray();
CHECK(variant.size() == 1);
CHECK(variant[0] == 42);
}
}
TEST_CASE("JsonVariant::createNestedObject(key)") {
@ -65,17 +43,6 @@ TEST_CASE("JsonVariant::createNestedObject(key)") {
REQUIRE(variant.is<JsonObject>() == true);
REQUIRE(variant["weather"]["temp"] == 42);
}
SECTION("does nothing on linked object") {
StaticJsonDocument<128> doc2;
doc2["hello"] = "world";
variant.link(doc2);
variant.createNestedObject("weather");
CHECK(variant.size() == 1);
CHECK(variant["hello"] == "world");
}
}
TEST_CASE("JsonVariant::createNestedArray(key)") {
@ -88,15 +55,4 @@ TEST_CASE("JsonVariant::createNestedArray(key)") {
REQUIRE(variant.is<JsonObject>() == true);
REQUIRE(arr.isNull() == false);
}
SECTION("does nothing on linked object") {
StaticJsonDocument<128> doc2;
doc2["hello"] = "world";
variant.link(doc2);
variant.createNestedArray("items");
CHECK(variant.size() == 1);
CHECK(variant["hello"] == "world");
}
}