Event is no longer exposed for guards of eventless transitions

CHANGELOG.rst

@@ -1,6 +1,13 @@
 Changelog
 =========
 
+1.2.2 (2018-06-21)
+------------------
+
+- (Fixed) Event is not exposed when guard of eventless transitions are evaluated (regression 
+  introduced in version 1.2.1).
+
+
 1.2.1 (2018-06-19)
 ------------------
 

sismic/__init__.py

@@ -1,5 +1,5 @@
 __package__ = 'sismic'
-__version__ = '1.2.1'
+__version__ = '1.2.2'
 __licence__ = 'LGPL3'
 __author__ = 'Alexandre Decan'
 __url__ = 'https://github.com/AlexandreDecan/sismic/'

sismic/interpreter/default.py

@@ -394,15 +394,18 @@ def _select_transitions(self, event: Event, states: List[str], *,
         ignored_states = set()  # type: Set[str]
 
         # Select transitions according to the semantics
-        for _, transitions in groupby(considered_transitions, lambda t: t[0]):  # event order
+        for eventless, transitions in groupby(considered_transitions, lambda t: t[0]):  # event order
+            # Event shouldn't be exposed to guards if we're processing eventless transition
+            exposed_event = None if eventless else event
+
             # If there are selected transitions (from previous group), ignore new ones
             if len(selected_transitions) > 0:
                 break
 
             # Remember that transitions are sorted based on event/eventless and the source state depth
             for *_, transition in transitions: 
                 if transition.source not in ignored_states:
-                    if transition.guard is None or self._evaluator.evaluate_guard(transition, event):
+                    if transition.guard is None or self._evaluator.evaluate_guard(transition, exposed_event):
                         # Add descendants/ancestors to ignored states
                         for state in ignored_state_selector(transition.source):
                             ignored_states.add(state)