Return self on load for chaining (#53)

dissect/cstruct/cstruct.py

@@ -188,7 +188,7 @@ def addtype(self, name: str, type_: BaseType, replace: bool = False) -> None:
 
         self.typedefs[name] = type_
 
-    def load(self, definition: str, deftype: int = None, **kwargs) -> None:
+    def load(self, definition: str, deftype: int = None, **kwargs) -> "cstruct":
         """Parse structures from the given definitions using the given definition type.
 
         Definitions can be parsed using different parsers. Currently, there's
@@ -212,6 +212,8 @@ def load(self, definition: str, deftype: int = None, **kwargs) -> None:
         elif deftype == cstruct.DEF_LEGACY:
             CStyleParser(self, **kwargs).parse(definition)
 
+        return self
+
     def loadfile(self, path: str, deftype: int = None, **kwargs) -> None:
         """Load structure definitions from a file.