Шаблоны

template<int32 aMaxLength> class TTextBuffer: public MString
    {
    public:
    /** Construct an empty TTextBuffer object. */
    TTextBuffer() { }
 
    /** Construct a TTextBuffer object from an 8-bit ASCII string. */
    TTextBuffer(const char* aText)
        {
        iLength = 0;
        while (*aText && iLength < aMaxLength)
            iText[iLength++] = *aText++;
        }
 
    // virtual functions from MString
    const uint16* Text() const { return iText; }
 
    private:
    // virtual functions from MString
    bool Writable() const { return true; }
    int32 MaxWritableLength() const { return aMaxLength; }
    uint16* WritableText() { return iText; }
    TResult Resize(int32 aNewLength)
        { return aNewLength <= aMaxLength ? KErrorNone : KErrorTextTruncated; }
 
    uint16 iText[aMaxLength];
    };
 
/** A macro to define a TTextBuffer object from an ASCII string literal. */
#define TTextLiteral(aName,aText) TTextBuffer<sizeof(aText)> aName(aText)

CartoType::TTextLiteral(layer, "car");

#define TTextLiteral(aName,aText) TTextBuffer<sizeof(aText)> aName(aText)

CartoType::TTextLiteral(layer, "car");

CartoType::TTextBuffer<sizeof("car")> layer("car");

CartoType::TTextBuffer<1024> layer("");