A C# library to write functional code - Part IV - Type Unions

Luca Bolognese's WebLog : A C# library to write functional code - Part I - Background

Fri, 06 Jun 2008 11:49:52 GMT

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re: A C# library to write functional code - Part IV - Type Unions

Jared Parsons — Fri, 06 Jun 2008 18:42:34 GMT

I'm curious as why you chose to inherit from Record as opposed to using it as a member variable. From your example it doesn't look like a TypeUnion "is" a Record so much as it uses a Record.

re: A C# library to write functional code - Part IV - Type Unions

lucabol — Mon, 09 Jun 2008 14:57:58 GMT

I cannot recall the reason, if there ever was one.

On the face of it, you are right.

re: A C# library to write functional code - Part IV - Type Unions

configurator — Tue, 10 Jun 2008 01:35:32 GMT

To access the type union you use the Is and As operator. That means that the usage of Type1 and Type2 in the record is not needed.

You can simply keep the value in a member object-type field. Then, you would simplify the code of As<> and not really much change anything else - except the constantly unused memory slot.

Also, you would be more efficient because the cast to object would be unnecessary. The only two things that would enforce or use the given types would be the constructor - which would only use the given types - and the match operator.

Just my two pence.

re: A C# library to write functional code - Part IV - Type Unions

santhiran — Wed, 11 Jun 2008 15:52:53 GMT

very nice your teachinfg methosd pls sent all C# programming learn tools

Thank You

re: A C# library to write functional code - Part IV - Type Unions

Coder — Wed, 18 Jun 2008 05:21:07 GMT

How can it be useful?! Does anybody have a real-world example?

Mr.

Strange Cat — Wed, 25 Jun 2008 17:36:42 GMT

Good to know lots of italian work for Microsoft :)

Ciao

re: A C# library to write functional code - Part IV - Type Unions

Hasan Naqvi — Fri, 27 Jun 2008 15:15:18 GMT

nice but wud u please tell us the usage of type unions in real world scenerios.

re: A C# library to write functional code - Part IV - Type Unions

Humberto Moreno — Mon, 30 Jun 2008 18:00:46 GMT

I think it would be a good idea to extend the base class to support not just two types, but multiple types. - Btw. I agree with Jared Parsons suggestion.

Overall it's a good idea. Thanks

A C# library to write functional code - Part V - The Match operator

Luca Bolognese's WebLog — Tue, 15 Jul 2008 12:46:25 GMT

Other posts in the series: Part I - Background Part II - Tuples Part III - Records Part IV - Type Unions