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[PULL,06/13] trace: Extend API to manage event arguments

Message ID 1456847294-13576-7-git-send-email-stefanha@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Stefan Hajnoczi March 1, 2016, 3:48 p.m. UTC 
From: Lluís Vilanova <vilanova@ac.upc.edu>

Lets the user manage event arguments as a list, and simplifies argument
concatenation.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 145641858432.30295.3069911069472672646.stgit@localhost
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 scripts/tracetool/__init__.py | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)
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Patch

diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py
index 181675f..0663e7f 100644
--- a/scripts/tracetool/__init__.py
+++ b/scripts/tracetool/__init__.py
@@ -50,9 +50,14 @@  class Arguments:
         Parameters
         ----------
         args :
-            List of (type, name) tuples.
+            List of (type, name) tuples or Arguments objects.
         """
-        self._args = args
+        self._args = []
+        for arg in args:
+            if isinstance(arg, Arguments):
+                self._args.extend(arg._args)
+            else:
+                self._args.append(arg)
 
     def copy(self):
         """Create a new copy."""
@@ -83,6 +88,12 @@  class Arguments:
             res.append((arg_type, identifier))
         return Arguments(res)
 
+    def __getitem__(self, index):
+        if isinstance(index, slice):
+            return Arguments(self._args[index])
+        else:
+            return self._args[index]
+
     def __iter__(self):
         """Iterate over the (type, name) pairs."""
         return iter(self._args)