Added example/duck_typing

Coreccted LabComm.py

examples/Makefile

@@ -8,8 +8,10 @@ test:
 	echo More to be done...
 	cd simple ; sh compile.sh && sh run.sh
 	$(MAKE) -C twoway test 
+	$(MAKE) -C duck_typing test
 
 .PHONY: clean distclean
 clean distclean:
 	echo To be done...
 	$(MAKE) -C twoway clean
+	$(MAKE) -C duck_typing clean

examples/duck_typing/Makefile

+LABCOMM_JAR=../../compiler/labComm.jar
+LABCOMM=java -jar $(LABCOMM_JAR) 
+
+all: gen/animal.py
+
+.PHONY: test
+test: gen/animal.py
+	PYTHONPATH=../../lib/python:gen ./duck_typing.py
+
+
+gen/.dir:
+	mkdir -p $@
+
+gen/%.py: %.lc | gen/.dir
+	$(LABCOMM) --python=$@ $<
+
+.PHONY: clean distclean
+clean distclean:
+	rm -rf gen
+

examples/duck_typing/animal.lc

+typedef struct {
+  string says;
+} animal;
+
+sample animal cow;
+sample animal dog;
+sample struct {
+  string says;
+} duck;
\ No newline at end of file

examples/duck_typing/duck_typing.py

+#!/usr/bin/python
+
+import labcomm
+import animal
+import StringIO
+
+class Animal:
+    def __init__(self):
+        self.says = None
+
+if __name__ == '__main__':
+    buf = StringIO.StringIO()
+    encoder = labcomm.Encoder(labcomm.StreamWriter(buf))
+    encoder.add_decl(animal.cow.signature)
+    encoder.add_decl(animal.dog.signature)
+    encoder.add_decl(animal.duck.signature)
+    theAnimal = Animal()
+    theAnimal.says = 'Moo'
+    encoder.encode(theAnimal, animal.cow.signature)
+    theAnimal.says = 'Bow-Wow'
+    encoder.encode(theAnimal, animal.dog.signature)
+    theAnimal.says = 'Quack'
+    encoder.encode(theAnimal, animal.duck.signature)
+    buf.seek(0)
+    decoder = labcomm.Decoder(labcomm.StreamReader(buf))
+    try:
+        while True:
+            value,decl = decoder.decode()
+            if value:
+                print decl.name, 'says', value.says
+                pass
+            pass
+        pass
+    except EOFError:
+        pass
+    pass

lib/python/labcomm/LabComm.py

@@ -431,7 +431,7 @@ class struct:
                 decl.encode(encoder, obj[name])
         else:
             for (name, decl) in self.field:
-                decl.encode(encoder, obj.__getattribute__(name))
+                decl.encode(encoder, getattr(obj, name))
 
     def decode_decl(self, decoder):
         n_field = decoder.decode_packed32()