Unknown6656.IndexableProperties

This library aims to bring indexable properties to C#.

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Installation

Use one of the follwing methods to install and use this library:

• Package Manager:

  PM> Install-Package Unknown6656.IndexableProperties

• .NET CLI:

  > dotnet add package Unknown6656.IndexableProperties

• Package reference (e.g. in a .csproj/.vbproj/.fsproj project file):

  <PackageReference Include="Unknown6656.IndexableProperties" Version="*" />

• Paket CLI:

  > paket add Unknown6656.IndexableProperties

• F# Interactive:

  #r "nuget: Unknown6656.IndexableProperties, *"

Documentation and Usage

To use the indexable properties, simply include the namespace Unknown6656:

using Unknown6656;

The library defines the following indexer types:

1. Readable/Writable indexers (Unknown6656.Indexer<...>)
2. Read-only indexers (Unknown6656.ReadOnlyIndexer<...>)
3. Write-only indexers (Unknown6656.WriteOnlyIndexer<...>)
4. By-reference indexers (Unknown6656.RedIndexer<...>)

Each indexer defines a set of index types (Index1 through IndexN) and a input/return value type (Value). An Indexer may be declared as follows:

public class MyClass
{
    public Indexer<int, string> MyIndex { get; } = new(...);
}

The code sample above declares a 1-dimensional indexer which takes an int as its only index and accepts/returns a string-value.

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Code samples

public class MyClass
{
    public Indexer<int, double> Items { get; }
    public Indexer<int, double> SquaredItems { get; }


    public MyClass(double[] array)
    {
        Items = new(
            index => array[index],
            (index, value) => array[index] = value
        );
        SquaredItems = new(
            index => array[index] * array[index],
            (index, value) => array[index] = Math.Sqrt(value)
        );
    }
}


MyClass c = new(new double [] { 1, 2, 3, 4, 5 });

double original = c.Items[3];
double squared = c.SquaredItems[3];

c.SquaredItems[3] = 42;

double newvalue = c.Items[3];

Console.WriteLine("original item at index 3:    " + original);
Console.WriteLine("original squared at index 3: " + squared);
Console.WriteLine("new item at index 3:         " + newvalue);

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