C++ fixed length string class?

Question

Is there anything like this in Standard C++ / STL? Ideally it should be constructed like

fstring s = fstring(10);

I need to sometimes cons

Answer 1

I've been using something like this for strings allocated on stack or as a part of another object. Which in release becomes a char*

#ifdef DEBUG
#define STR_DEBUG
#endif

#define FIXED_STRING( maxSize ) ReservedString _Tmp##__LINE__; 

class FixedString{
public:
    FixedString& operator =( char const * const pStr );
    //FixedString& operator =( FixedString const &pStr );
    operator const char*() const { return mStr; }
    const char* cStr() const { return mStr; }
    FixedString& operator +=(const char *pStr);
    bool equals( const char *pStr );
    bool beginsWith( const char *pStr );
    /// rises ASSERT if not enough
    void ensureEnoughForNMore( int NMoreSymbols );
protected:
    char *mStr;
    #ifdef STR_DEBUG
        ui16 mMaxLength;
    #endif

private:
    #ifdef STR_DEBUG
        FixedString( char *str, ui16 maxLength ): mStr(str), mMaxLength(maxLength) {}
    #else
        FixedString( char *str ): mStr(str) {}
    #endif
    template
    friend  class ReservedString;
};

template  class ReservedString{
public:
    operator FixedString() { 
        #ifdef STR_DEBUG
            return FixedString( mBuf, MAX_LENGTH );
        #else
            return FixedString( mBuf );
        #endif
    }   
private:
    char mBuf[MAX_LENGTH+1];
};