activity diagram for token application

doc/uml/lib/token activity.puml

@@ -0,0 +1,44 @@
+@startuml "Token.apply activity diagram"
+title Token.apply
+
+left footer
+Les méthodes et champs de l'argument "context" et "self" ont été raccourcis pour gagner de la place.
+"t" will be incremented by placing the length instruction in "slopes". Context.render will tick every slope variable at every frame.
+endfooter
+
+start
+
+(C)
+switch (T)
+case (Silence)
+    :render(None);
+case (Marser)
+    :result = [];
+case (Note)
+    :render(n);
+case (VariableChange)
+    :variables[name] = change.eval(variables);
+case (Loop)
+    :old_context = context.clone();
+    :context.result = [];
+    :new_context = fold inner into current context with Token.apply;
+    :return new_context.replace(result, old_context.result + new_context.result * count);
+case (Tuplet)
+    :current_length = current_length();
+    :calculate how many samples should fit in the current length;
+    :old_context = context.clone();
+    :context.result = [];
+    :new_context = fold inner into current context with Token.apply;
+    :new_context.variables[t] = old_context.variables[t];
+    :spray new_context.result with void until it fits the sample count;
+    :prepend old_context.result;
+    :return new context;
+case (Slope)
+    :slopes += (each_frame.name, each_frame.change);
+    :context = fold inner into current context with Token.apply;
+    :slopes[each_frame.name].drop();
+endswitch
+
+stop
+
+@enduml