amorfo77/json
1
0
Fork 0
mirror of https://github.com/nlohmann/json.git synced 2026-07-11 21:15:10 +00:00
Code Issues Packages Projects Releases Wiki Activity

fix: support constructing json from C++20 range views (#4916) (#5205)

Browse Source
This commit is contained in:
Federico Sfriso
2026-07-11 09:13:04 +02:00
committed by GitHub
parent 6ba332c7df
commit c60217e801
4 changed files with 270 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tests/src/unit-regression2.cpp
+40
View File
@@ -1165,6 +1165,46 @@ TEST_CASE("regression tests 2")
}
#endif
#if JSON_HAS_RANGES && !defined(__MINGW32__)
SECTION("issue #4916 - constructing array from C++20 ranges view does not work")
{
std::vector<int> nums{1, 2, 37, 42, 21};
auto filteredNums = nums | std::views::filter([](int i)
{
return i > 10;
});
json const j(filteredNums);
CHECK(j.type() == json::value_t::array);
CHECK(j == json({37, 42, 21}));
}
#endif
// owning_view is not available in libstdc++ < 12
#if JSON_HAS_RANGES && !defined(__MINGW32__) && !(defined(__GLIBCXX__) && _GLIBCXX_RELEASE < 12)
SECTION("issue #4916 - constructing array from prvalue C++20 ranges view (owning_view)")
{
json const j(std::vector<int> {1, 2, 37, 42, 21} | std::views::filter([](int i)
{
return i > 10;
}));
CHECK(j.type() == json::value_t::array);
CHECK(j == json({37, 42, 21}));
}
#endif
#if JSON_HAS_RANGES && !defined(__MINGW32__)
SECTION("issue #4916 - constructing array from C++20 transform view (prvalue elements)")
{
std::vector<int> nums{1, 2, 3};
auto t = nums | std::views::transform([](int i) noexcept
{
return i * 2;
});
json const j(t);
CHECK(j.type() == json::value_t::array);
CHECK(j == json({2, 4, 6}));
}
#endif
}
TEST_CASE_TEMPLATE("issue #4798 - nlohmann::json::to_msgpack() encode float NaN as double", T, double, float) // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)