Class BigInt

example/print_half.cpp:38–44

Do not static_store BigInt to actually work -- it's a stub.

// Do not static_store BigInt to actually work -- it's a stub.
struct BigInt
{
    static leaf::result<BigInt> fromString(const std::string& s) { return BigInt{s}; }
    explicit BigInt(const std::string&) { }
    BigInt half() const { return BigInt{""}; }
    friend std::ostream& operator<<(std::ostream& o, const BigInt&) { return o << "big int half"; }
};

// This function handles ConversionErrc::TooLong errors, forwards any other
// error to the caller.