Class ifstream

src/fl/stl/fstream.h:48–201

// ============================================================================

class ifstream {
private:
    filebuf_ptr mHandle;
    fl::size_t mLastRead;
    bool mGood;
    bool mEof;
    bool mFail;

    void updateState() {
        if (mHandle && mHandle->is_open()) {
            mEof = mHandle->is_eof();
            mFail = mHandle->has_error();
            mGood = !mEof && !mFail;
        } else {
            mGood = false;
            mEof = false;
            mFail = true;
        }
    }

public:
    ifstream() FL_NOEXCEPT : mLastRead(0), mGood(false), mEof(false), mFail(true) {}

    explicit ifstream(const char* path, ios::openmode mode = ios::in);

    explicit ifstream(filebuf_ptr handle);

    ~ifstream() FL_NOEXCEPT;

    // Non-copyable
    ifstream(const ifstream&) FL_NOEXCEPT = delete;
    ifstream& operator=(const ifstream&) = delete;

    // Moveable
    ifstream(ifstream&& other) FL_NOEXCEPT
        : mHandle(other.mHandle), mLastRead(other.mLastRead),
          mGood(other.mGood), mEof(other.mEof), mFail(other.mFail) {
        other.mHandle.reset();
        other.mLastRead = 0;
        other.mGood = false;
        other.mEof = false;
        other.mFail = true;
    }

    ifstream& operator=(ifstream&& other) FL_NOEXCEPT {
        if (this != &other) {
            close();
            mHandle = other.mHandle;
            mLastRead = other.mLastRead;
            mGood = other.mGood;
            mEof = other.mEof;
            mFail = other.mFail;
            other.mHandle.reset();
            other.mLastRead = 0;
            other.mGood = false;
            other.mEof = false;
            other.mFail = true;
        }