XB Library: xb::type

The XB nodes may store type information regarding the value stored. The xb::type is template that is specialized for every instrinsic type as stated in format specification.

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Interface:

namespace xb {
    template <typename T>
    struct type {
        static const xb::element info;
    };
};


Following data types are defined by specification:

• 0x62 - boolean value, zero = false, non-zero = true
• 0x69 - signed integer number
• 0x75 - unsigned integer number
• 0x66 - floating point (real) number
• 0x62 - ASCII character string
• 0x77 - unicode character string

The specialization is provided for following data types:

• bool - 0x62 ('b')
• char - 0x63 ('c')
• char [] - 0x63 ('c')
• wchar_t (16-bit) - 0x77 ('w')
• wchar_t [] (16-bit) - 0x77 ('w')
• wchar_t (32-bit) - 0x57 ('W')
• wchar_t [] (32-bit) - 0x57 ('W')
• signed char - 0x69 ('i')
• signed short - 0x69 ('i')
• signed int - 0x69 ('i')
• signed long - 0x69 ('i')
• signed long long - 0x69 ('i') // where available
• unsigned char - 0x75 ('u')
• unsigned short - 0x75 ('u')
• unsigned int - 0x75 ('u')
• unsigned long - 0x75 ('u')
• unsigned long long - 0x75 ('u') // where available
• float - 0x66 ('f')
• double - 0x66 ('f')
• long double - 0x66 ('f')

User type information:

When it is neccessary to provide type information for another or user-defined type, all you need to do is write a specialization of the xb::type template for that type.

Examples:

// ...

struct myType {
    int a;
    int b;
    int c;
};

namespace xb {
    template <> struct type <myType>
        { static const element info; };

    const element type <myType> ::info ("myType"); // this line would go into .cpp
};

// ...

myType val;
xb::node n (name, val);

n.serialize (...);

// ...


Remarks:

None.

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