create custom constant suffix in C#

问题

i am trying to develop a class for unlimited size integer values, all i need is to make a new custom constant suffix used with the assign operator.

For example:

lets assume the class name is BigInt and the Suffix created is B

the assign statement will be like this

// B character will tell the compiler about the New Data Type
BigInt x = 111111111111111111111111111111111111111111111111B;

is there any way to achieve this?

Special Regards

回答1:

No, there isn't any way to do this in C# at this time.

Workarounds: You can check out Nemerle which is a very flexible, meta-programming friendly language based on the C# syntax.

回答2:

There is no way to extend the language directly in the manner you describe.

You could write a .NET language that is C# like and accepts such a specifier, but there is nothing like what you are trying to do.

Note: There is an existing structure for integers of arbitrary size BigInteger - no need to reinvent the wheel.

回答3:

No. The language / compiler do not support this. Something close, which you might want to look into is an implicit conversion operator. That would let you do something like this:

BigInt b = "1234";

public class BigInt
{
    public static implicit operator BigInt(string value)
    {
        return new BigInt {Value = value};
    }
    public string Value { get; private set; }
}

回答4:

Microsoft already did this. It's called a BigInteger. Think it came out with .NET 4.0?

Here's the MSDN link: http://msdn.microsoft.com/en-us/library/system.numerics.biginteger.aspx

As for extending it like that, I don't think that's possible in C#. You'd have to overload the assignment operator, and that's only do-able in C++ as far as I know.

回答5:

I'm not entirely certain but you can take a look at Roslyn. Check out http://kevinmontrose.com/2012/06/10/extending-type-inferencing-in-c/ for more information.

来源：https://stackoverflow.com/questions/11268213/create-custom-constant-suffix-in-c-sharp

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