Add TaskSeq.where and whereAsync as aliases to filter just like in Seq

Author: abelbraaksma

src/FSharp.Control.TaskSeq/TaskSeq.fs

@@ -285,6 +285,8 @@ type TaskSeq private () =
 
     static member filter predicate source = Internal.filter (Predicate predicate) source
     static member filterAsync predicate source = Internal.filter (PredicateAsync predicate) source
+    static member where predicate source = Internal.filter (Predicate predicate) source
+    static member whereAsync predicate source = Internal.filter (PredicateAsync predicate) source
 
     static member skip count source = Internal.skipOrTake Skip count source
     static member drop count source = Internal.skipOrTake Drop count source

src/FSharp.Control.TaskSeq/TaskSeq.fsi

@@ -725,10 +725,38 @@ type TaskSeq =
     /// <exception cref="T:ArgumentNullException">Thrown when the input task sequence is null.</exception>
     static member filterAsync: predicate: ('T -> #Task<bool>) -> source: TaskSeq<'T> -> TaskSeq<'T>
 
+    /// <summary>
+    /// Returns a new task sequence containing only the elements of the collection
+    /// for which the given function <paramref name="predicate" /> returns <see cref="true" />.
+    /// If <paramref name="predicate" /> is asynchronous, consider using <see cref="TaskSeq.whereAsync" />.
+    ///
+    /// Alias for <see cref="TaskSeq.filter" />.
+    /// </summary>
+    ///
+    /// <param name="predicate">A function to test whether an item in the input sequence should be included in the output or not.</param>
+    /// <param name="source">The input task sequence.</param>
+    /// <returns>The resulting task sequence.</returns>
+    /// <exception cref="T:ArgumentNullException">Thrown when the input task sequence is null.</exception>
+    static member where: predicate: ('T -> bool) -> source: TaskSeq<'T> -> TaskSeq<'T>
+
+    /// <summary>
+    /// Returns a new task sequence containing only the elements of the input sequence
+    /// for which the given function <paramref name="predicate" /> returns <see cref="true" />.
+    /// If <paramref name="predicate" /> is synchronous, consider using <see cref="TaskSeq.where" />.
+    ///
+    /// Alias for <see cref="TaskSeq.filterAsync" />.
+    /// </summary>
+    ///
+    /// <param name="predicate">An asynchronous function to test whether an item in the input sequence should be included in the output or not.</param>
+    /// <param name="source">The input task sequence.</param>
+    /// <returns>The resulting task sequence.</returns>
+    /// <exception cref="T:ArgumentNullException">Thrown when the input task sequence is null.</exception>
+    static member whereAsync: predicate: ('T -> #Task<bool>) -> source: TaskSeq<'T> -> TaskSeq<'T>
+
     /// <summary>
     /// Returns a task sequence that, when iterated, skips <paramref name="count" /> elements of the underlying
     /// sequence, and then yields the remainder. Raises an exception if there are not <paramref name="count" />
-    /// items. See <see cref="drop" /> for a version that does not raise an exception.
+    /// items. See <see cref="TaskSeq.drop" /> for a version that does not raise an exception.
     /// See also <see cref="take" /> for the inverse of this operation.
     /// </summary>
     ///
@@ -742,7 +770,6 @@ type TaskSeq =
     /// </exception>
     static member skip: count: int -> source: TaskSeq<'T> -> TaskSeq<'T>
 
-
     /// <summary>
     /// Returns a task sequence that, when iterated, drops at most <paramref name="count" /> elements of the
     /// underlying sequence, and then returns the remainder of the elements, if any.