Number to string function using constexpr lamba with auto deductible parameters

to_string_generic_c++17.cpp

#include <charconv>
#include <iostream>
#include <array>

constexpr auto ToString = [](auto number) constexpr -> const std::string {
    std::array<char, 20 /* Max chars in 64 bit number*/> buffer;
    if (auto [ptr, ec] = std::to_chars(buffer.data(), buffer.data() + buffer.size(), number); ec == std::errc())
    {
        return std::string{buffer.data(), static_cast<size_t>(ptr - buffer.data())};
    }
    return {};
};

int main() {
    std::cout << "\"1234.123\": " << ToString(1234.123) << "\n";
    std::cout << "\"1234\": " << ToString(1234) << "\n";
    std::cout << "\"0.0f\": " << ToString(0.0f) << "\n";
}