intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 35 insertions, 0 deletions

diff --git a/contrib/tools/cython/Cython/Compiler/CodeGeneration.py b/contrib/tools/cython/Cython/Compiler/CodeGeneration.py
new file mode 100644
index 00000000000..e64049c7f5d
--- /dev/null
+++ b/contrib/tools/cython/Cython/Compiler/CodeGeneration.py
@@ -0,0 +1,35 @@
+from __future__ import absolute_import
+
+from .Visitor import VisitorTransform
+from .Nodes import StatListNode
+
+
+class ExtractPxdCode(VisitorTransform):
+    """
+    Finds nodes in a pxd file that should generate code, and
+    returns them in a StatListNode.
+
+    The result is a tuple (StatListNode, ModuleScope), i.e.
+    everything that is needed from the pxd after it is processed.
+
+    A purer approach would be to separately compile the pxd code,
+    but the result would have to be slightly more sophisticated
+    than pure strings (functions + wanted interned strings +
+    wanted utility code + wanted cached objects) so for now this
+    approach is taken.
+    """
+
+    def __call__(self, root):
+        self.funcs = []
+        self.visitchildren(root)
+        return (StatListNode(root.pos, stats=self.funcs), root.scope)
+
+    def visit_FuncDefNode(self, node):
+        self.funcs.append(node)
+        # Do not visit children, nested funcdefnodes will
+        # also be moved by this action...
+        return node
+
+    def visit_Node(self, node):
+        self.visitchildren(node)
+        return node