--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/parser/GuardParser.java	Mon Aug 11 15:57:14 2014 +0200
@@ -0,0 +1,104 @@
+/*
+ * 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.parser;
+
+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.java.*;
+import com.oracle.truffle.dsl.processor.model.*;
+
+public class GuardParser extends NodeMethodParser<GuardData> {
+
+    private final Set<String> guardNames;
+    private final TemplateMethod compatibleSource;
+
+    public GuardParser(ProcessorContext context, NodeData node, TemplateMethod compatibleSource, Set<String> guardNames) {
+        super(context, node);
+        this.guardNames = guardNames;
+        this.compatibleSource = compatibleSource;
+        setEmitErrors(false);
+        setParseNullOnError(false);
+    }
+
+    @Override
+    protected ParameterSpec createValueParameterSpec(NodeExecutionData execution) {
+        return super.createValueParameterSpec(execution);
+    }
+
+    @Override
+    public MethodSpec createSpecification(ExecutableElement method, AnnotationMirror mirror) {
+        MethodSpec spec = createDefaultMethodSpec(method, mirror, true, null);
+        spec.setIgnoreAdditionalSpecifications(true);
+        if (compatibleSource != null) {
+            spec.getRequired().clear();
+            for (Parameter parameter : compatibleSource.getRequiredParameters()) {
+                spec.addRequired(new ParameterSpec(parameter.getSpecification(), ElementUtils.getAssignableTypes(getContext(), parameter.getType())));
+            }
+        }
+        return spec;
+    }
+
+    @Override
+    protected List<TypeMirror> nodeTypeMirrors(NodeData nodeData) {
+        Set<TypeMirror> typeMirrors = new LinkedHashSet<>();
+        typeMirrors.addAll(nodeData.getTypeSystem().getPrimitiveTypeMirrors());
+        typeMirrors.addAll(nodeData.getTypeSystem().getBoxedTypeMirrors());
+        return new ArrayList<>(typeMirrors);
+    }
+
+    @Override
+    protected ParameterSpec createReturnParameterSpec() {
+        return new ParameterSpec("returnType", getContext().getType(boolean.class));
+    }
+
+    @Override
+    public boolean isParsable(ExecutableElement method) {
+        return guardNames.contains(method.getSimpleName().toString());
+    }
+
+    @Override
+    public GuardData create(TemplateMethod method, boolean invalid) {
+        Implies impliesAnnotation = method.getMethod().getAnnotation(Implies.class);
+        String[] impliesExpressions = new String[0];
+        if (impliesAnnotation != null) {
+            impliesExpressions = impliesAnnotation.value();
+        }
+        List<GuardExpression> guardExpressions = new ArrayList<>();
+        for (String string : impliesExpressions) {
+            guardExpressions.add(new GuardExpression(string));
+        }
+        return new GuardData(method, guardExpressions);
+    }
+
+    @Override
+    public Class<? extends Annotation> getAnnotationType() {
+        return null;
+    }
+
+}