diff --git a/.idea/modules.xml b/.idea/modules.xml
index 335a959bed2..8958a9581db 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -6,6 +6,7 @@
       <module fileurl="file://$PROJECT_DIR$/examples/examples.iml" filepath="$PROJECT_DIR$/examples/examples.iml" />
       <module fileurl="file://$PROJECT_DIR$/grammar/grammar.iml" filepath="$PROJECT_DIR$/grammar/grammar.iml" />
       <module fileurl="file://$PROJECT_DIR$/idea/idea.iml" filepath="$PROJECT_DIR$/idea/idea.iml" />
+      <module fileurl="file://$PROJECT_DIR$/stdlib/stdlib.iml" filepath="$PROJECT_DIR$/stdlib/stdlib.iml" />
     </modules>
   </component>
 </project>
diff --git a/idea/idea.iml b/idea/idea.iml
index fcc6e7e360a..d01e54ca4d0 100644
--- a/idea/idea.iml
+++ b/idea/idea.iml
@@ -10,6 +10,7 @@
     <orderEntry type="jdk" jdkName="IDEA 10.x" jdkType="IDEA JDK" />
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" name="asm" level="project" />
+    <orderEntry type="module" module-name="stdlib" />
   </component>
 </module>
 
diff --git a/idea/src/org/jetbrains/jet/codegen/ExpressionCodegen.java b/idea/src/org/jetbrains/jet/codegen/ExpressionCodegen.java
index b19daacfe70..1f6a0aa7b26 100644
--- a/idea/src/org/jetbrains/jet/codegen/ExpressionCodegen.java
+++ b/idea/src/org/jetbrains/jet/codegen/ExpressionCodegen.java
@@ -4,6 +4,7 @@ import com.intellij.openapi.project.Project;
 import com.intellij.psi.*;
 import com.intellij.psi.search.ProjectScope;
 import com.intellij.psi.tree.IElementType;
+import jet.IntRange;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.psi.*;
 import org.jetbrains.jet.lang.resolve.BindingContext;
@@ -32,11 +33,15 @@ public class ExpressionCodegen extends JetVisitor {
     private static final String CLASS_ITERABLE = "java/lang/Iterable";
     private static final String CLASS_ITERATOR = "java/util/Iterator";
 
+    private static final String CLASS_INT_RANGE = "jet/IntRange";
+
     private static final String ITERABLE_ITERATOR_DESCRIPTOR = "()Ljava/util/Iterator;";
     private static final String ITERATOR_HASNEXT_DESCRIPTOR = "()Z";
     private static final String ITERATOR_NEXT_DESCRIPTOR = "()Ljava/lang/Object;";
+    private static final String INT_RANGE_CONSTRUCTOR_DESCRIPTOR = "(II)V";
 
     private static final Type ITERATOR_TYPE = Type.getType(Iterator.class);
+    private static final Type INT_RANGE_TYPE = Type.getType(IntRange.class);
 
     private final Stack<Label> myContinueTargets = new Stack<Label>();
     private final Stack<Label> myBreakTargets = new Stack<Label>();
@@ -706,6 +711,9 @@ public class ExpressionCodegen extends JetVisitor {
         else if (opToken == JetTokens.ELVIS) {
             generateElvis(expression);
         }
+        else if (opToken == JetTokens.RANGE) {
+            generateRange(expression);
+        }
         else {
             DeclarationDescriptor op = bindingContext.resolveReferenceExpression(expression.getOperationReference());
             if (op instanceof FunctionDescriptor) {
@@ -816,6 +824,21 @@ public class ExpressionCodegen extends JetVisitor {
         myStack.push(StackValue.onStack(exprType));
     }
 
+    private void generateRange(JetBinaryExpression expression) {
+        final Type leftType = expressionType(expression.getLeft());
+        if (isIntPrimitive(leftType)) {
+            v.anew(INT_RANGE_TYPE);
+            v.dup();
+            gen(expression.getLeft(), Type.INT_TYPE);
+            gen(expression.getRight(), Type.INT_TYPE);
+            v.invokespecial(CLASS_INT_RANGE, "<init>", INT_RANGE_CONSTRUCTOR_DESCRIPTOR);
+            myStack.push(StackValue.onStack(INT_RANGE_TYPE));
+        }
+        else {
+            throw new UnsupportedOperationException("ranges are only supported for int objects");
+        }
+    }
+
     private static boolean isNumberPrimitive(DeclarationDescriptor descriptor) {
         if (!(descriptor instanceof ClassDescriptor)) {
             return false;
diff --git a/idea/tests/org/jetbrains/jet/codegen/NamespaceGenTest.java b/idea/tests/org/jetbrains/jet/codegen/NamespaceGenTest.java
index e3179f32814..fd74ebf0f0e 100644
--- a/idea/tests/org/jetbrains/jet/codegen/NamespaceGenTest.java
+++ b/idea/tests/org/jetbrains/jet/codegen/NamespaceGenTest.java
@@ -1,5 +1,6 @@
 package org.jetbrains.jet.codegen;
 
+import jet.IntRange;
 import org.jetbrains.jet.parsing.JetParsingTest;
 
 import java.awt.*;
@@ -358,4 +359,13 @@ public class NamespaceGenTest extends CodegenTestCase {
         main.invoke(null, new Object[] { data });
         assertEquals(10, data[0]);
     }
+
+    public void testIntRange() throws Exception {
+        loadText("fun foo() = 1..10");
+        final Method main = generateFunction();
+        IntRange result = (IntRange) main.invoke(null);
+        assertTrue(result.contains(1));
+        assertTrue(result.contains(10));
+        assertFalse(result.contains(11));
+    }
 }
diff --git a/stdlib/src/jet/IntRange.java b/stdlib/src/jet/IntRange.java
new file mode 100644
index 00000000000..b816414f65b
--- /dev/null
+++ b/stdlib/src/jet/IntRange.java
@@ -0,0 +1,20 @@
+package jet;
+
+public class IntRange implements Range<Integer> {
+    private final int startValue;
+    private final int endValue;
+
+    public IntRange(int startValue, int endValue) {
+        this.startValue = startValue;
+        this.endValue = endValue;
+    }
+
+    @Override
+    public boolean contains(Integer item) {
+        if (item == null) return false;
+        if (startValue <= endValue) {
+            return item >= startValue && item <= endValue;
+        }
+        return item <= startValue && item >= endValue;
+    }
+}
diff --git a/stdlib/src/jet/Range.java b/stdlib/src/jet/Range.java
new file mode 100644
index 00000000000..b1fe86e3b72
--- /dev/null
+++ b/stdlib/src/jet/Range.java
@@ -0,0 +1,5 @@
+package jet;
+
+public interface Range<T extends Comparable<T>> {
+    boolean contains(T item);
+}
diff --git a/stdlib/stdlib.iml b/stdlib/stdlib.iml
new file mode 100644
index 00000000000..d5c07432750
--- /dev/null
+++ b/stdlib/stdlib.iml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
+