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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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20
extras/tests/JsonVariant/remove.cpp
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@ -39,24 +39,4 @@ TEST_CASE("JsonVariant::remove()") {
REQUIRE(var.as<std::string>() == "{\"a\":1}");
}
SECTION("linked array") {
StaticJsonDocument<128> doc2;
doc2[0] = 42;
var.link(doc2);
var.remove(0);
CHECK(var.as<std::string>() == "[42]");
}
SECTION("linked object") {
StaticJsonDocument<128> doc2;
doc2["hello"] = "world";
var.link(doc2);
var.remove("hello");
CHECK(var.as<std::string>() == "{\"hello\":\"world\"}");
}
}