A plain (void) cast on a call expression suppresses the C++17 [[nodiscard]]
warning but not GCC's warning for functions annotated via the GNU
__attribute__((warn_unused_result)) form -- which is what
JSON_HEDLEY_WARN_UNUSED_RESULT expands to on GCC. Several existing tests
that call a newly-annotated function (dump(), empty()) purely to check
that it throws/does not throw, discarding the result via (void), newly
warned (and failed -Werror builds) once the annotation was broadened.
Route those discards through a small ignore_return_value() helper
instead, which actually consumes the value and suppresses the warning
on both attribute forms.
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
* Fix for printing long doubles bug in dump_float
When you use long double as a floating point type with the current version of this file and try to dump json it prints trash instead of actual number. This if-else fixes the problem. On using long double you just need to add an 'L' modifier before 'g' in format string.
Signed-off-by: Kirill Lokotkov <klokotkov@ya.ru>
* C++11 compatibility
Signed-off-by: Kirill Lokotkov <klokotkov@ya.ru>
* Shorter solution
Signed-off-by: Kirill Lokotkov <klokotkov@ya.ru>
* Applied amalgamate
Signed-off-by: rusloker <klokotkov@ya.ru>
* Add unit tests for `dump()` with `long double` in custom `basic_json`
Signed-off-by: rusloker <klokotkov@ya.ru>
* Fix UB in `snprintf_float` by using `%.*Lg` for `long double`
Signed-off-by: rusloker <klokotkov@ya.ru>
* Use `std::array` for `values` in serialization unit tests to improve type safety
Signed-off-by: rusloker <klokotkov@ya.ru>
* Fix brace initialization for `std::array` in serialization unit tests
Signed-off-by: rusloker <klokotkov@ya.ru>
* Remove comments in `snprintf_float` regarding `%Lg` usage
Signed-off-by: rusloker <klokotkov@ya.ru>
* Skip `long double` infinity dump assertions under Valgrind
Signed-off-by: rusloker <klokotkov@ya.ru>
* Clarify Valgrind bug-tracker reference in `long double` test
Signed-off-by: rusloker <klokotkov@ya.ru>
* Satisfy clang-tidy in `long double` infinity probe
Signed-off-by: rusloker <klokotkov@ya.ru>
---------
Signed-off-by: Kirill Lokotkov <klokotkov@ya.ru>
Signed-off-by: rusloker <klokotkov@ya.ru>
Niels Lohmann
Kirill Lokotkov
