doc raise exceptions with a base class

Although valid in very old Python, it is no longer possible to raise
"bare" exceptions without a class.

Signed-off-by: Alfredo Deza <adeza@redhat.com>

diff --git a/doc/scripts/gen_state_diagram.py b/doc/scripts/gen_state_diagram.py
index 8363d9898f1b1e7641128b1ca43f48a42f2a5fce..94c1f03eee5534d4628747effdd6b69ade4bc93a 100755 (executable)
--- a/doc/scripts/gen_state_diagram.py
+++ b/doc/scripts/gen_state_diagram.py
@@ -107,7 +107,7 @@ class StateMachineRenderer(object):
                 r"boost::statechart::state_machine<\s*(\w*),\s*(\w*)\s*>",
                 line)
             if tokens is None:
-                raise "Error: malformed state_machine line: " + line
+                raise Exception("Error: malformed state_machine line: " + line)
             self.machines[tokens.group(1)] = tokens.group(2)
             self.context.append((tokens.group(1), self.context_depth, ""))
             return
@@ -116,7 +116,7 @@ class StateMachineRenderer(object):
                 r"boost::statechart::state<\s*(\w*),\s*(\w*)\s*,?\s*(\w*)\s*>",
                 line)
             if tokens is None:
-                raise "Error: malformed state line: " + line
+                raise Exception("Error: malformed state line: " + line)
             self.states[tokens.group(1)] = tokens.group(2)
             if tokens.group(2) not in self.state_contents.keys():
                 self.state_contents[tokens.group(2)] = []
@@ -133,14 +133,14 @@ class StateMachineRenderer(object):
                 if i.group(1) not in self.edges.keys():
                     self.edges[i.group(1)] = []
                 if len(self.context) is 0:
-                    raise "no context at line: " + line
+                    raise Exception("no context at line: " + line)
                 self.edges[i.group(1)].append((self.context[-1][0], i.group(2)))
         i = re.search("return\s+transit<\s*(\w*)\s*>()", line)
         if i is not None:
             if len(self.context) is 0:
-                raise "no context at line: " + line
+                raise Exception("no context at line: " + line)
             if self.context[-1][2] is "":
-                raise "no event in context at line: " + line
+                raise Exception("no event in context at line: " + line)
             if self.context[-1][2] not in self.edges.keys():
                 self.edges[self.context[-1][2]] = []
             self.edges[self.context[-1][2]].append((self.context[-1][0], i.group(1)))