--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/node/CreateCastParser.java	Mon Jul 01 20:58:32 2013 +0200
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.dsl.processor.node;
+
+import java.lang.annotation.*;
+import java.util.*;
+
+import javax.lang.model.element.*;
+import javax.lang.model.type.*;
+
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.dsl.processor.*;
+import com.oracle.truffle.dsl.processor.template.*;
+
+public class CreateCastParser extends NodeMethodParser<CreateCastData> {
+
+    public CreateCastParser(ProcessorContext context, NodeData operation) {
+        super(context, operation);
+    }
+
+    @Override
+    public Class<? extends Annotation> getAnnotationType() {
+        return CreateCast.class;
+    }
+
+    @Override
+    public MethodSpec createSpecification(ExecutableElement method, AnnotationMirror mirror) {
+        List<String> childNames = Utils.getAnnotationValueList(String.class, mirror, "value");
+        TypeMirror baseType = getContext().getTruffleTypes().getNode();
+        for (String childName : childNames) {
+            NodeChildData child = getNode().findChild(childName);
+            if (child != null) {
+                baseType = child.getOriginalType();
+                break;
+            }
+        }
+        MethodSpec spec = new MethodSpec(new InheritsParameterSpec(getContext(), "child", baseType));
+        addDefaultFieldMethodSpec(method, spec);
+        spec.addRequired(new ParameterSpec("castedChild", baseType)).setSignature(true);
+        return spec;
+    }
+
+    @Override
+    public CreateCastData create(TemplateMethod method) {
+        AnnotationMirror mirror = method.getMarkerAnnotation();
+        List<String> childNames = Utils.getAnnotationValueList(String.class, mirror, "value");
+        CreateCastData cast = new CreateCastData(method, childNames);
+        AnnotationValue value = Utils.getAnnotationValue(mirror, "value");
+        TypeMirror type = null;
+        if (childNames == null || childNames.isEmpty()) {
+            cast.addError(value, "No value specified but required.");
+            return cast;
+        }
+
+        for (String childName : childNames) {
+            NodeChildData child = getNode().findChild(childName);
+            if (child == null) {
+                // error
+                cast.addError(value, "Specified child '%s' not found.", childName);
+                continue;
+            }
+            if (type == null) {
+                type = child.getNodeType();
+            } else if (!Utils.typeEquals(type, child.getNodeType())) {
+                cast.addError(value, "All child nodes for a cast must have the same node type.");
+                continue;
+            }
+        }
+        return cast;
+    }
+
+    private static class InheritsParameterSpec extends ParameterSpec {
+
+        private final ProcessorContext context;
+
+        public InheritsParameterSpec(ProcessorContext context, String name, TypeMirror... allowedTypes) {
+            super(name, Arrays.asList(allowedTypes));
+            this.context = context;
+        }
+
+        @Override
+        public boolean matches(TypeMirror actualType) {
+            boolean found = false;
+            for (TypeMirror specType : getAllowedTypes()) {
+                if (Utils.isAssignable(context, actualType, specType)) {
+                    found = true;
+                    break;
+                }
+            }
+            return found;
+        }
+    }
+}