Type alias

Is there a way to define somthing in my assembly along the lines of

MyQuery<T> = Expression<Func<IQueryable<T>, IQueryable<T>>>

I'm feed up of typing this over and over again!

Cheers,

Stephen.

I don't know any way. You can declare alias with a using-directive.

using MyQuery = System.Linq.Expressions.Expression<System.Func<System.Linq.IQueryable<int>, System.Linq.IQueryable<int>>>;

However it doesn't work to declare a 'generic' alias :

// Does NOT work =( 
  
using MyQuery<T> = System.Linq.Expressions.Expression<System.Func<System.Linq.IQueryable<T>, System.Linq.IQueryable<T>>>; 

static global method that acts as a Factory?

Foo<T>();

or Foo<T>( TypeThing T);

that retun an instance of the target Type ?

figuerres said:

static global method that acts as a Factory?

 

Foo<T>();

or Foo<T>( TypeThing T);

 

that retun an instance of the target Type ?

 

About the best option I settled on was something along the lines of as static method on a class

 
public static Expression<Func<IQueryable<T>, IQueryable<T>>> CreateQuery<T>(Expression<Func<IQueryable<T>, IQueryable<T>>> spec)

{

   return spec;

}

And then in the app code

var spec = DataRepository.CreateQuery<User>((x) => from u in x where u.FirstName == firstname select u) ;

Seems the best compromise for readability in the app code.