1 files changed, 95 insertions, 0 deletions
diff --git a/libs/python/pyste/src/Pyste/policies.py b/libs/python/pyste/src/Pyste/policies.py
new file mode 100644
index 000000000..57ebd0dea
--- /dev/null
+++ b/libs/python/pyste/src/Pyste/policies.py
@@ -0,0 +1,95 @@
+# Copyright Bruno da Silva de Oliveira 2003. Use, modification and 
+# distribution is subject to the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at 
+# http://www.boost.org/LICENSE_1_0.txt)
+
+
+
+class Policy(object):
+    'Represents one of the call policies of boost.python.'
+
+    def __init__(self):
+        if type(self) is Policy:
+            raise RuntimeError, "Can't create an instance of the class Policy"
+
+
+    def Code(self):
+        'Returns the string corresponding to a instancialization of the policy.'
+        pass
+        
+
+    def _next(self):
+        if self.next is not None:
+            return ', %s >' % self.next.Code()
+        else:
+            return ' >'
+
+
+    def __eq__(self, other):
+        try:
+            return self.Code() == other.Code()
+        except AttributeError:
+            return False
+
+
+
+class return_internal_reference(Policy):
+    'Ties the return value to one of the parameters.'
+
+    def __init__(self, param=1, next=None):
+        '''
+        param is the position of the parameter, or None for "self".
+        next indicates the next policy, or None.
+        '''
+        self.param = param
+        self.next=next
+
+
+    def Code(self):
+        c = 'return_internal_reference< %i' % self.param
+        c += self._next()
+        return c
+
+
+
+class with_custodian_and_ward(Policy):
+    'Ties lifetime of two arguments of a function.'
+
+    def __init__(self, custodian, ward, next=None):
+        self.custodian = custodian
+        self.ward = ward
+        self.next = next
+
+    def Code(self):
+        c = 'with_custodian_and_ward< %i, %i' % (self.custodian, self.ward)
+        c += self._next()
+        return c
+
+
+
+class return_value_policy(Policy):
+    'Policy to convert return values.'
+    
+    def __init__(self, which, next=None):            
+        self.which = which
+        self.next = next
+
+
+    def Code(self):
+        c = 'return_value_policy< %s' % self.which
+        c += self._next()
+        return c
+
+class return_self(Policy):
+
+    def Code(self):
+        return 'return_self<>'
+
+
+#  values for return_value_policy
+reference_existing_object = 'reference_existing_object'
+copy_const_reference = 'copy_const_reference'
+copy_non_const_reference = 'copy_non_const_reference'
+manage_new_object = 'manage_new_object'        
+return_opaque_pointer = 'return_opaque_pointer'
+return_by_value = 'return_by_value'