Q# – Function Templates

Generics helps in the  following ways to write code.

• Code reuse, performance and type safety
• Creation of custom generic classes, methods, interfaces and delegates
• Creation of Generic Collection classes
• Retrieving information of the types used in generic data type at run-time
• Better performance

The code below shows a generic method with different type parameters such as int, char and double typed parameters. 

Code Snippet : FunctionTemplates  Example

public class FunctionTemplates
{

    public void Show<TypeOfValue>(string message, TypeOfValue value)
    {
        Console.WriteLine("{0}:{1}", message, value);
    }
} 

Code Snippet : FunctionTemplates Driver Example

using System;

using Microsoft.Quantum.Simulation.Core;
using Microsoft.Quantum.Simulation.Simulators;

namespace Hello
{
    class Driver
    {
        static void Main(string[] args)
        {

            FunctionTemplates p = new FunctionTemplates();

            p.Show<int>("Integer", 10);
            p.Show<char>("Character", 'E');
            p.Show<double>("Decimal", 231.78);
           
        }

    }

Run the following commands  to execute the project in Visual Studio Code:

^F5 

In the terminal, you can execute the build by running the command below.

dotnet run

The screenshot of the output is attached below: