diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/patterns/GroovyAssignmentExpressionPattern.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/patterns/GroovyAssignmentExpressionPattern.java
new file mode 100644
index 000000000000..7a95db57cd35
--- /dev/null
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/patterns/GroovyAssignmentExpressionPattern.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2000-2011 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jetbrains.plugins.groovy.lang.psi.patterns;
+
+import com.intellij.patterns.ElementPattern;
+import com.intellij.patterns.PatternCondition;
+import com.intellij.util.ProcessingContext;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrAssignmentExpression;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrBinaryExpression;
+
+public class GroovyAssignmentExpressionPattern extends GroovyExpressionPattern<GrAssignmentExpression, GroovyAssignmentExpressionPattern> {
+  protected GroovyAssignmentExpressionPattern() {
+    super(GrAssignmentExpression.class);
+  }
+
+  public GroovyAssignmentExpressionPattern left(@NotNull final ElementPattern pattern) {
+    return with(new PatternCondition<GrAssignmentExpression>("left") {
+      public boolean accepts(@NotNull final GrAssignmentExpression psiBinaryExpression, final ProcessingContext context) {
+        return pattern.getCondition().accepts(psiBinaryExpression.getLValue(), context);
+      }
+    });
+  }
+
+  public GroovyAssignmentExpressionPattern right(@NotNull final ElementPattern pattern) {
+    return with(new PatternCondition<GrAssignmentExpression>("right") {
+      public boolean accepts(@NotNull final GrAssignmentExpression psiBinaryExpression, final ProcessingContext context) {
+        return pattern.getCondition().accepts(psiBinaryExpression.getRValue(), context);
+      }
+    });
+  }
+
+  public GroovyAssignmentExpressionPattern operation(final ElementPattern pattern) {
+    return with(new PatternCondition<GrAssignmentExpression>("operation") {
+      public boolean accepts(@NotNull final GrAssignmentExpression psiBinaryExpression, final ProcessingContext context) {
+        return pattern.getCondition().accepts(psiBinaryExpression.getOperationToken(), context);
+      }
+    });
+  }
+
+}
diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/patterns/GroovyPatterns.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/patterns/GroovyPatterns.java
index 13864a087d40..992876369a78 100644
--- a/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/patterns/GroovyPatterns.java
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/patterns/GroovyPatterns.java
@@ -36,10 +36,7 @@ import org.jetbrains.plugins.groovy.lang.psi.api.auxiliary.GrListOrMap;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.arguments.GrArgumentLabel;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.arguments.GrArgumentList;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.arguments.GrNamedArgument;
-import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrCall;
-import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
-import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrMethodCall;
-import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.*;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.literals.GrLiteral;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.path.GrCallExpression;
 import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.TypesUtil;
@@ -58,6 +55,10 @@ public class GroovyPatterns extends PsiJavaPatterns {
     return new GroovyBinaryExpressionPattern();
   }
 
+  public static GroovyAssignmentExpressionPattern groovyAssignmentExpression() {
+    return new GroovyAssignmentExpressionPattern();
+  }
+
   public static GroovyElementPattern.Capture<GrLiteral> groovyLiteralExpression() {
     return groovyLiteralExpression(null);
   }
@@ -71,6 +72,23 @@ public class GroovyPatterns extends PsiJavaPatterns {
     });
   }
 
+  public static GroovyElementPattern.Capture<GroovyPsiElement> rightOfAssignment(final ElementPattern<? extends GroovyPsiElement> value,
+                                                                                 final GroovyAssignmentExpressionPattern assignment) {
+    return new GroovyElementPattern.Capture<GroovyPsiElement>(new InitialPatternCondition<GroovyPsiElement>(GroovyPsiElement.class) {
+      @Override
+      public boolean accepts(@Nullable Object o, ProcessingContext context) {
+        if (!(o instanceof GroovyPsiElement)) return false;
+
+        PsiElement parent = ((GroovyPsiElement)o).getParent();
+        if (!(parent instanceof GrAssignmentExpression)) return false;
+
+        if (((GrAssignmentExpression)parent).getRValue() != o) return false;
+
+        return assignment.getCondition().accepts(parent, context) && value.getCondition().accepts(o, context);
+      }
+    });
+  }
+
   public static GroovyElementPattern.Capture<GrLiteralImpl> stringLiteral() {
     return new GroovyElementPattern.Capture<GrLiteralImpl>(new InitialPatternCondition<GrLiteralImpl>(GrLiteralImpl.class) {
       public boolean accepts(@Nullable final Object o, final ProcessingContext context) {
@@ -91,7 +109,8 @@ public class GroovyPatterns extends PsiJavaPatterns {
           PsiElement nameElement = ((GrArgumentLabel)o).getNameElement();
           if (nameElement instanceof LeafPsiElement) {
             IElementType elementType = ((LeafPsiElement)nameElement).getElementType();
-            if (elementType == GroovyElementTypes.mIDENT || CommonClassNames.JAVA_LANG_STRING.equals(TypesUtil.getPsiTypeName(elementType))) {
+            if (elementType == GroovyElementTypes.mIDENT ||
+                CommonClassNames.JAVA_LANG_STRING.equals(TypesUtil.getPsiTypeName(elementType))) {
               return namePattern.accepts(((GrArgumentLabel)o).getName());
             }
           }