CODEWITHSUNDEEP
c#
Luke101
Luke101

Reputation: 65308

What syntax is this

I have seen this code in NodaTime. Here is the code here

public bool Equals(DateInterval other) => this == other;

This code uses the => operator to define the body of a function. I tried to create a project using syntax but keeps giving me an error. I am using visual studio 2012. How can I use this same syntax in my code.

Upvotes: 1

Views: 99

Answers (3)

A_Sk
A_Sk

Reputation: 4630

Expression-bodied function members allow properties, methods, operators and other function members to have bodies as lambda like expressions instead of statement blocks. Thus reducing lines of codes and clear view of the expressions.

Now in C# 6.0, instead of writing the whole property body using getters/setters, you can now just use the lambda arrow (“=>”) to return values.

For example, the below code returns the string “My Name” when you access the property “NewName”. Remember that, in this case you don’t have to write the “return” keyword. The lambda arrow (=>) will do the same for you internally.

Public string NewName=>"My Name" //this is the new way 
public string NewName//this was the old 
{
  get
  {
    return "My Name";
  }
}

Another Example

Public int NewSum(int a,int b)=>a+b;//new way

public int oldSum(int a,int b)//old way
{
  return a+b;
}

Link Here

Upvotes: 1

Arvind Krmar
Arvind Krmar

Reputation: 2612

public bool Equals(DateInterval other) => this == other;

is equivalent to:

public bool Equals(DateInterval other)
{
   return this==other;
}

Upvotes: 2

zneak
zneak

Reputation: 138241

This is an expression-bodied function from C# 6. It's supported in Visual Studio 2015 and above. You can read more on the announcement of C# 6 (look for "Expression Bodied Functions and Properties").

Upvotes: 6

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