Databases
StackOverflow2013
Postsdbo
POClass type inference from static method / caller?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POClass type inference from static method / caller?
    primarykey
    data
    text
    <p>Given the following two classes:</p> <pre><code>public class ABC { public void Accept(Ordering&lt;User&gt; xyz) { // Do stuff with xyz... } } public class Ordering&lt;TEntity&gt; where TEntity : class { private readonly Func&lt;IQueryable&lt;TEntity&gt;, IOrderedQueryable&lt;TEntity&gt;&gt; Transform; private Ordering(Func&lt;IQueryable&lt;TEntity&gt;, IOrderedQueryable&lt;TEntity&gt;&gt; transform) { this.Transform = transform; } public static Ordering&lt;TEntity&gt; By&lt;TKey&gt;(Expression&lt;Func&lt;TEntity, TKey&gt;&gt; expression) { return new Ordering&lt;TEntity&gt;(query =&gt; query.OrderBy(expression)); } public static Ordering&lt;TEntity&gt; ByDescending&lt;TKey&gt;(Expression&lt;Func&lt;TEntity, TKey&gt;&gt; expression) { return new Ordering&lt;TEntity&gt;(query =&gt; query.OrderByDescending(expression)); } public Ordering&lt;TEntity&gt; ThenBy&lt;TKey&gt;(Expression&lt;Func&lt;TEntity, TKey&gt;&gt; expression) { return new Ordering&lt;TEntity&gt;(query =&gt; this.Transform(query).ThenBy(expression)); } public Ordering&lt;TEntity&gt; ThenByDescending&lt;TKey&gt;(Expression&lt;Func&lt;TEntity, TKey&gt;&gt; expression) { return new Ordering&lt;TEntity&gt;(query =&gt; this.Transform(query).ThenByDescending(expression)); } public IOrderedQueryable&lt;TEntity&gt; Apply(IQueryable&lt;TEntity&gt; query) { return Transform(query); } } </code></pre> <p>Used in the following way:</p> <pre><code>ABC abc = new ABC(); abc.Accept(Ordering&lt;User&gt;.By(u =&gt; u.Id)); </code></pre> <p>Is there any way to infer the type of <code>T</code> like so:</p> <pre><code>abc.Accept(Ordering.By(u =&gt; u.Id)); </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USTheCloudlessSky
    1. USTheCloudlessSky
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POClass type inference from static method / caller?
      1. USJohn Saunders
      1. VTFavorite
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload