Transition changes

Added a method to return a transition to a completion transition.
Added a When overload that can evaluate just the context.
Do not trigger a model bootstrap when changing transition predicates
(as they do not need it).

README.md

@@ -1,6 +1,6 @@
 # Welcome to state.cs
 
-The current stable release is 5.0.0.
+The current stable release is 5.0.1.
 
 If you're using state.cs I'd love to hear about it; please e-mail me at [email protected] 
 

src/Transition.cs

@@ -97,33 +97,55 @@ internal Transition( Vertex<TContext> source, Vertex<TContext> target ) {
 
 			this.Source = source;
 			this.Target = target;
-			this.Predicate = ( context, message ) => message == this.Source;
+//			this.Predicate = ( context, message ) => message == this.Source;
+
+			this.Completion();
 		}
 
 		/// <summary>
 		/// Adds a typed guard condition to a transition that can evaluate both the state machine context and the triggering message.
 		/// </summary>
 		/// <typeparam name="TMessage">The type of the message that can trigger the transition.</typeparam>
-		/// <param name="guard">The guard condition that must evaluate true for the transition to be traversed.</param>
+		/// <param name="guard">The guard condition taking both the state machine context and the message that must evaluate true for the transition to be traversed.</param>
 		/// <returns>Returns the transition.</returns>
 		public Transition<TContext> When<TMessage>( Func<TContext, TMessage, Boolean> guard ) where TMessage : class {
 			this.Predicate = ( context, message ) => message is TMessage && guard( context, message as TMessage );
 
-			this.Source.Root.Clean = false;
-
 			return this;
 		}
 
 		/// <summary>
 		/// Adds a typed guard condition to a transition that can evaluate the triggering message.
 		/// </summary>
 		/// <typeparam name="TMessage">The type of the message that can trigger the transition.</typeparam>
-		/// <param name="guard">The guard condition that must evaluate true for the transition to be traversed.</param>
+		/// <param name="guard">A guard condition taking the message that must evaluate true for the transition to be traversed.</param>
 		/// <returns>Returns the transition.</returns>
 		public Transition<TContext> When<TMessage>( Func<TMessage, Boolean> guard ) where TMessage : class {
 			this.Predicate = ( context, message ) => message is TMessage && guard( message as TMessage );
 
-			this.Source.Root.Clean = false;
+			return this;
+		}
+
+		/// <summary>
+		/// Adds a guard condition to a transition that can evaluate the triggering message.
+		/// </summary>
+		/// <param name="guard">A guard condition, taking just the state machine context, that must evaluate true for the transition to be traversed.</param>
+		/// <returns>Returns the transition.</returns>
+		public Transition<TContext> When( Func<TContext, Boolean> guard ) {
+			this.Predicate = ( context, message ) => guard( context );
+
+			return this;
+		}
+
+		/// <summary>
+		/// Turns a transition into a completion transition
+		/// </summary>
+		/// <returns>Returns the transition.</returns>
+		/// <remarks>
+		/// All transitions are completion tansitions when initially created; this method can be used to return a transition to be a completion transition if prior calls to When or Else have been made.
+		/// </remarks>
+		public Transition<TContext> Completion() {
+			this.Predicate = ( context, message ) => message == this.Source;
 
 			return this;
 		}
@@ -137,8 +159,6 @@ public Transition<TContext> Else() {
 
 			this.Predicate = Transition<TContext>.IsElse;
 
-			this.Source.Root.Clean = false;
-
 			return this;
 		}