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💥 implemented new handling of NaN and INF #70 #329 #388

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- If an overflow occurs during parsing a number from a JSON text, an
exception (std::out_of_range for the moment, to be replaced by a
user-defined exception #244) is thrown so that the overflow is detected
early and roundtripping is guaranteed.
- NaN and INF floating-point values can be stored in a JSON value and
are not replaced by null. That is, the basic_json class behaves like
double in this regard (no exception occurs). However, NaN and INF are
serialized to “null”.
- Adjusted test cases appropriately.
This commit is contained in:
Niels Lohmann
2017-03-12 18:38:05 +01:00
parent 9355f05888
commit 8feaf8dc94
8 changed files with 100 additions and 46 deletions
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35
test/src/unit-regression.cpp
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@ -49,6 +49,7 @@ TEST_CASE("regression tests")
SECTION("issue #70 - Handle infinity and NaN cases")
{
/*
SECTION("NAN value")
{
CHECK(json(NAN) == json());
@ -60,6 +61,36 @@ TEST_CASE("regression tests")
CHECK(json(INFINITY) == json());
CHECK(json(json::number_float_t(INFINITY)) == json());
}
*/
// With 3.0.0, the semantics of this changed: NAN and infinity are
// stored properly inside the JSON value (no exception or conversion
// to null), but are serialized as null.
SECTION("NAN value")
{
json j1 = NAN;
CHECK(j1.is_number_float());
json::number_float_t f1 = j1;
CHECK(std::isnan(f1));
json j2 = json::number_float_t(NAN);
CHECK(j2.is_number_float());
json::number_float_t f2 = j2;
CHECK(std::isnan(f2));
}
SECTION("infinity")
{
json j1 = INFINITY;
CHECK(j1.is_number_float());
json::number_float_t f1 = j1;
CHECK(not std::isfinite(f1));
json j2 = json::number_float_t(INFINITY);
CHECK(j2.is_number_float());
json::number_float_t f2 = j2;
CHECK(not std::isfinite(f2));
}
}
SECTION("pull request #71 - handle enum type")
@ -559,8 +590,8 @@ TEST_CASE("regression tests")
SECTION("issue #329 - serialized value not always can be parsed")
{
json j = json::parse("22e2222");
CHECK(j == json());
CHECK_THROWS_AS(json::parse("22e2222"), std::out_of_range);
CHECK_THROWS_WITH(json::parse("22e2222"), "number overflow: 22e2222");
}
SECTION("issue #366 - json::parse on failed stream gets stuck")