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🐛 fixed callback-related issue (https://github.com/nlohmann/json/issues/971#issuecomment-413678360)

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Niels Lohmann 2018-08-17 23:09:45 +02:00
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commit e33b31e6aa
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26 changed files with 97 additions and 18880 deletions
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include/nlohmann/detail/input/json_sax.hpp
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@ -572,6 +572,13 @@ class json_sax_dom_callback_parser
}
else
{
// skip this value if we already decided to skip the parent
// (https://github.com/nlohmann/json/issues/971#issuecomment-413678360)
if (not ref_stack.back())
{
return {false, nullptr};
}
assert(ref_stack.back()->is_array() or ref_stack.back()->is_object());
if (ref_stack.back()->is_array())
{

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single_include/nlohmann/json.hpp
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@ -4348,6 +4348,13 @@ class json_sax_dom_callback_parser
}
else
{
// skip this value if we already decided to skip the parent
// (https://github.com/nlohmann/json/issues/971#issuecomment-413678360)
if (not ref_stack.back())
{
return {false, nullptr};
}
assert(ref_stack.back()->is_array() or ref_stack.back()->is_object());
if (ref_stack.back()->is_array())
{

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test/src/unit-regression.cpp
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@ -1472,6 +1472,46 @@ TEST_CASE("regression tests")
// "[json.exception.out_of_range.408] excessive object size: 8658170730974374167");
}
SECTION("issue #971 - Add a SAX parser - late bug")
{
// a JSON text
auto text = R"(
{
"Image": {
"Width": 800,
"Height": 600,
"Title": "View from 15th Floor",
"Thumbnail": {
"Url": "http://www.example.com/image/481989943",
"Height": 125,
"Width": 100
},
"Animated" : false,
"IDs": [116, 943, 234, 38793]
}
}
)";
// define parser callback
json::parser_callback_t cb = [](int depth, json::parse_event_t event, json & parsed)
{
// skip object elements with key "Thumbnail"
if (event == json::parse_event_t::key and parsed == json("Thumbnail"))
{
return false;
}
else
{
return true;
}
};
// parse (with callback) and serialize JSON
json j_filtered = json::parse(text, cb);
CHECK(j_filtered == R"({"Image":{"Animated":false,"Height":600,"IDs":[116,943,234,38793], "Title":"View from 15th Floor","Width":800}})"_json);
}
SECTION("issue #972 - Segmentation fault on G++ when trying to assign json string literal to custom json type")
{
my_json foo = R"([1, 2, 3])"_json;