CODEWITHSUNDEEP
c#
Peter
Peter

Reputation: 1

Method Signature Explanation Required

I am trying to understand a complex (for me) method.

Here is the signature for the method:

public static List<T> GetAll<R, T>(RestClient client, RestRequest request) where R : new()

Now from this I understand that it will return a generic type and that it requires a RestClient and RestRequest object as parameters.

But I dont understand what the:

<R, T>

and

where R : new()

bits actually means?

Can someone elaborate please?

Upvotes: 0

Views: 64

Answers (1)

zaitsman
zaitsman

Reputation: 9519

These are Generic type constraints

Essentially, this signature says:

public static List<T> GetAll<R, T>(RestClient client, RestRequest request) where R : new()

public - accessible outside of this Assembly

static - non-instance, static (aka class) method

List<T> - returns a System.Collections.Generic.List<T> - an array-like collection where items inside it have type T

GetAll<R, T> - GetAll is the method name; R,T -> i imagine, RequestType and T where t is ResponseType.

(RestClient client, RestRequest request) are just arguments to the method

where R : new() - the method is only valid for types R where R has a public parameterless constructor (e.g. you can type somewhere new R())

Usages could be:

List<string> GetAll<object, string>(RestClient client, RestRequest request);

It is not a really good signature because it is not clear why the author needs R.

Upvotes: 7

Related Questions