The std::from_chars function does not throw, it only returns a value of type from_chars_result
which is a struct with two fields:
struct from_chars_result {
const char* ptr;
std::errc ec;
};
You should inspect the values of ptr
and ec
when the function returns:
#include <iostream>
#include <string>
#include <charconv>
int main()
{
int i3;
std::string_view sv = "abc";
auto result = std::from_chars(sv.data(), sv.data() + sv.size(), i3);
if (result.ec == std::errc::invalid_argument) {
std::cout << "Could not convert.";
}
}