1 files changed, 50 insertions, 0 deletions
diff --git a/src/Language/Def/Language/AsyncCompletion/Data/UpdateTrigger.cs b/src/Language/Def/Language/AsyncCompletion/Data/UpdateTrigger.cs
new file mode 100644
index 0000000..6151d88
--- /dev/null
+++ b/src/Language/Def/Language/AsyncCompletion/Data/UpdateTrigger.cs
@@ -0,0 +1,50 @@
+using System;
+using System.Diagnostics;
+
+namespace Microsoft.VisualStudio.Language.Intellisense.AsyncCompletion.Data
+{
+    /// <summary>
+    /// What triggered updating of completion.
+    /// </summary>
+    [DebuggerDisplay("{Reason} {Character}")]
+    public struct UpdateTrigger : IEquatable<UpdateTrigger>
+    {
+        /// <summary>
+        /// The reason that completion was updated.
+        /// </summary>
+        public UpdateTriggerReason Reason { get; }
+
+        /// <summary>
+        /// The text edit associated with the triggering action.
+        /// </summary>
+        public char Character { get; }
+
+        /// <summary>
+        /// Creates a <see cref="UpdateTrigger"/> associated with a text edit
+        /// </summary>
+        /// <param name="reason">The kind of action that triggered completion to update</param>
+        /// <param name="character">Character that triggered the update</param>
+        public UpdateTrigger(UpdateTriggerReason reason, char character)
+        {
+            this.Reason = reason;
+            this.Character = character;
+        }
+
+        /// <summary>
+        /// Creates a <see cref="InitialTrigger"/> not associated with a text edit
+        /// </summary>
+        /// <param name="reason">The kind of action that triggered completion to update</param>
+        public UpdateTrigger(UpdateTriggerReason reason) : this(reason, default(char))
+        { }
+
+        bool IEquatable<UpdateTrigger>.Equals(UpdateTrigger other) => Reason.Equals(other.Reason) && Character.Equals(other.Character);
+
+        public override bool Equals(object other) => (other is InitialTrigger otherImage) ? ((IEquatable<UpdateTrigger>)this).Equals(otherImage) : false;
+
+        public static bool operator ==(UpdateTrigger left, UpdateTrigger right) => left.Equals(right);
+
+        public static bool operator !=(UpdateTrigger left, UpdateTrigger right) => !(left == right);
+
+        public override int GetHashCode() => Reason.GetHashCode() ^ Character.GetHashCode();
+    }
+}