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Fix bug in diff function #2054

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merged 1 commit into from
Apr 20, 2020
Merged

Fix bug in diff function #2054

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2 changes: 1 addition & 1 deletion include/nlohmann/json.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -7930,7 +7930,7 @@ class basic_json
result.push_back(
{
{"op", "add"},
{"path", path + "/" + std::to_string(i)},
{"path", path + "/-"},
{"value", target[i]}
});
++i;
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2 changes: 1 addition & 1 deletion single_include/nlohmann/json.hpp
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Expand Up @@ -22741,7 +22741,7 @@ class basic_json
result.push_back(
{
{"op", "add"},
{"path", path + "/" + std::to_string(i)},
{"path", path + "/-"},
{"value", target[i]}
});
++i;
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8 changes: 8 additions & 0 deletions test/src/unit-regression.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1896,6 +1896,14 @@ TEST_CASE("regression tests")
static_assert(!std::is_constructible<json, std::tuple<NotSerializableData, std::string>>::value, "");
static_assert(std::is_constructible<json, std::tuple<int, std::string>>::value, "");
}

SECTION("issue #1983 - JSON patch diff for op=add formation is not as per standard (RFC 6902)")
{
const auto source = R"({ "foo": [ "1", "2" ] })"_json;
const auto target = R"({"foo": [ "1", "2", "3" ]})"_json;
const auto result = json::diff(source, target);
CHECK(result.dump() == R"([{"op":"add","path":"/foo/-","value":"3"}])");
}
}

#if not defined(JSON_NOEXCEPTION)
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