Convert byte array to generic value type?

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借酒劲吻你
借酒劲吻你 2021-01-23 06:08

I have a Stream where I\'d like to read data from (as value type segments) and move the position according to the size of the given type (declared as generics).

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  • 2021-01-23 06:33
    return (TValue)buffer; // here's where I'm stuck
    

    Yes, you have just shifted the problem. From not having a Stream.Read<T>() to not having a Convert<T>(byte[]) in the std library.
    And you would have to call it like Read<int>() anyway so there isn't a direct advantage over BinaryReader.ReadInt32()

    Now when you want to use it from another generic class/method, the Read<T>() syntax is useful but for the implementation you might as well map it to BinaryReader calls. I'm afraid that will require boxing:

    obcject result = null;
    if (typeof(TValue) == typeof(int))
      result = reader.ReadInt32();
    else if (typeof(TValue) == typeof(double))
      result = reader.ReadDouble();
    else ...
    
    return (TValue) result;
    
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