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@ -180,6 +180,15 @@ Hence, we have the following examples:
// result == std::numeric_limits<double>::infinity() // result == std::numeric_limits<double>::infinity()
``` ```
Users who wish for the value to be left unmodified given `std::errc::result_out_of_range` may do so by adding two lines of code:
```cpp
double old_result = result; // make copy
auto r = fast_float::from_chars(start, end, result);
if(r.ec == std::errc::result_out_of_range) { result = old_result; }
```
## C++20: compile-time evaluation (constexpr) ## C++20: compile-time evaluation (constexpr)
In C++20, you may use `fast_float::from_chars` to parse strings In C++20, you may use `fast_float::from_chars` to parse strings