--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/core/RegexpNodes.java	Tue Jan 07 18:53:04 2014 +0100
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
+ * code is released under a tri EPL/GPL/LGPL license. You can use it,
+ * redistribute it and/or modify it under the terms of the:
+ *
+ * Eclipse Public License version 1.0
+ * GNU General Public License version 2
+ * GNU Lesser General Public License version 2.1
+ */
+package com.oracle.truffle.ruby.nodes.core;
+
+import java.util.regex.*;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.ruby.runtime.*;
+import com.oracle.truffle.ruby.runtime.core.*;
+
+@CoreClass(name = "Regexp")
+public abstract class RegexpNodes {
+
+    @CoreMethod(names = {"=~", "==="}, minArgs = 1, maxArgs = 1)
+    public abstract static class MatchOperatorNode extends CoreMethodNode {
+
+        public MatchOperatorNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public MatchOperatorNode(MatchOperatorNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public Object match(VirtualFrame frame, RubyRegexp regexp, RubyString string) {
+            return regexp.matchOperator(frame.getCaller().unpack(), string.toString());
+        }
+
+    }
+
+    @CoreMethod(names = "!~", minArgs = 1, maxArgs = 1)
+    public abstract static class NotMatchOperatorNode extends CoreMethodNode {
+
+        public NotMatchOperatorNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public NotMatchOperatorNode(NotMatchOperatorNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public Object match(VirtualFrame frame, RubyRegexp regexp, RubyString string) {
+            return regexp.matchOperator(frame.getCaller().unpack(), string.toString()) == NilPlaceholder.INSTANCE;
+        }
+
+    }
+
+    @CoreMethod(names = "escape", isModuleMethod = true, needsSelf = false, minArgs = 1, maxArgs = 1)
+    public abstract static class EscapeNode extends CoreMethodNode {
+
+        public EscapeNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public EscapeNode(EscapeNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public RubyString sqrt(RubyString pattern) {
+            return getContext().makeString(Pattern.quote(pattern.toString()));
+        }
+
+    }
+
+    @CoreMethod(names = "initialize", minArgs = 1, maxArgs = 1)
+    public abstract static class InitializeNode extends CoreMethodNode {
+
+        public InitializeNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public InitializeNode(InitializeNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public NilPlaceholder initialize(RubyRegexp regexp, RubyString string) {
+            regexp.initialize(string.toString());
+            return NilPlaceholder.INSTANCE;
+        }
+
+    }
+
+    @CoreMethod(names = "match", minArgs = 1, maxArgs = 1)
+    public abstract static class MatchNode extends CoreMethodNode {
+
+        public MatchNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public MatchNode(MatchNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public Object match(RubyRegexp regexp, RubyString string) {
+            return regexp.match(string.toString());
+        }
+
+    }
+
+}