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Merge e6867f54b978ff992f4855ce7026a21c0f1a78b4 into f8c573d7419ab08de382c60005e37caa271e869a

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@ -58,32 +58,36 @@ Example:
#include "fast_float/fast_float.h"
#include <iostream>
#include <string>
#include <system_error>
int main() {
std::string input = "3.1416 xyz ";
const std::string input = "3.1416 xyz ";
double result;
auto answer = fast_float::from_chars(input.data(), input.data() + input.size(), result);
if (answer.ec != std::errc()) { std::cerr << "parsing failure\n"; return EXIT_FAILURE; }
std::cout << "parsed the number " << result << std::endl;
if (answer.ec != std::errc()) {
std::cerr << "parsing failure\n";
return EXIT_FAILURE;
}
std::cout << "parsed the number " << result << '\n';
return EXIT_SUCCESS;
}
```
Though the C++17 standard has you do a comparison with `std::errc()` to check whether the conversion worked, you can avoid it by casting the result to a `bool` like so:
Prior to C++26, checking for a successful `std::from_chars` conversion requires comparing the `from_chars_result::ec` member to `std::errc()`. As an extension `fast_float::from_chars` supports the improved C++26 API that allows checking the result by converting it to `bool`, like so:
```cpp
```C++
#include "fast_float/fast_float.h"
#include <iostream>
#include <string>
int main() {
std::string input = "3.1416 xyz ";
const std::string input = "3.1416 xyz ";
double result;
if (auto answer = fast_float::from_chars(input.data(), input.data() + input.size(), result)) {
std::cout << "parsed the number " << result << std::endl;
std::cout << "parsed the number " << result << '\n';
return EXIT_SUCCESS;
}
std::cerr << "failed to parse " << result << std::endl;
std::cerr << "parsing failure\n";
return EXIT_FAILURE;
}
```
@ -91,7 +95,7 @@ int main() {
You can parse delimited numbers:
```C++
std::string input = "234532.3426362,7869234.9823,324562.645";
const std::string input = "234532.3426362,7869234.9823,324562.645";
double result;
auto answer = fast_float::from_chars(input.data(), input.data() + input.size(), result);
if (answer.ec != std::errc()) {