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/ClassCodegen.java b/idea/src/org/jetbrains/jet/codegen/ClassCodegen.java
index c62c45cd104..a7e4872dff8 100644
--- a/idea/src/org/jetbrains/jet/codegen/ClassCodegen.java
+++ b/idea/src/org/jetbrains/jet/codegen/ClassCodegen.java
@@ -5,10 +5,7 @@ import com.intellij.psi.PsiClass;
 import com.intellij.psi.PsiElement;
 import org.jetbrains.jet.lang.psi.*;
 import org.jetbrains.jet.lang.resolve.BindingContext;
-import org.jetbrains.jet.lang.types.ClassDescriptor;
-import org.jetbrains.jet.lang.types.JetStandardLibrary;
-import org.jetbrains.jet.lang.types.JetType;
-import org.jetbrains.jet.lang.types.PropertyDescriptor;
+import org.jetbrains.jet.lang.types.*;
 import org.objectweb.asm.ClassVisitor;
 import org.objectweb.asm.MethodVisitor;
 import org.objectweb.asm.Opcodes;
@@ -27,11 +24,15 @@ public class ClassCodegen {
     private final Project project;
     private final BindingContext bindingContext;
     private final Codegens factory;
+    private final JetTypeMapper typeMapper;
 
     public ClassCodegen(Project project, Codegens factory, BindingContext bindingContext) {
         this.project = project;
         this.factory = factory;
         this.bindingContext = bindingContext;
+
+        final JetStandardLibrary standardLibrary = JetStandardLibrary.getJetStandardLibrary(project);
+        typeMapper = new JetTypeMapper(standardLibrary, bindingContext);
     }
 
     public void generate(JetClass aClass) {
@@ -68,7 +69,7 @@ public class ClassCodegen {
         ClassVisitor v = kind == OwnerKind.IMPLEMENTATION ? factory.forClassImplementation(descriptor) : factory.forClassDelegatingImplementation(descriptor);
         v.visit(Opcodes.V1_6,
                 Opcodes.ACC_PUBLIC,
-                JetTypeMapper.jvmNameForImplementation(descriptor),
+                JetTypeMapper.jvmName(descriptor, kind),
                 null,
                 superClass,
                 new String[] {JetTypeMapper.jvmNameForInterface(descriptor)}
@@ -158,31 +159,133 @@ public class ClassCodegen {
     }
 
     private void generatePrimaryConstructor(JetClass aClass, ClassVisitor v, OwnerKind kind) {
+        ConstructorDescriptor constructorDescriptor = bindingContext.getConstructorDescriptor(aClass);
+        if (constructorDescriptor == null) return;
+
+        ClassDescriptor classDescriptor = bindingContext.getClassDescriptor(aClass);
+
+        Method method = typeMapper.mapConstructorSignature(constructorDescriptor, kind);
         int flags = Opcodes.ACC_PUBLIC; // TODO
-        Method method = new Method("<init>", Type.VOID_TYPE, new Type[0]);
         final MethodVisitor mv = v.visitMethod(flags, "<init>", method.getDescriptor(), null, null);
         mv.visitCode();
 
+        Type[] argTypes = method.getArgumentTypes();
+        List<ValueParameterDescriptor> paramDescrs = constructorDescriptor.getUnsubstitutedValueParameters();
+
         FrameMap frameMap = new FrameMap();
         frameMap.enterTemp();   // this
 
         final InstructionAdapter iv = new InstructionAdapter(mv);
-        String superClass = getSuperClass(aClass, kind);
-        iv.load(0, Type.getType("L" + superClass + ";"));
-        iv.invokespecial(superClass, "<init>", method.getDescriptor());
+        ExpressionCodegen codegen = new ExpressionCodegen(mv, bindingContext, frameMap, typeMapper, Type.VOID_TYPE, classDescriptor, kind);
 
-        final JetStandardLibrary standardLibrary = JetStandardLibrary.getJetStandardLibrary(project);
-        final JetTypeMapper typeMapper = new JetTypeMapper(standardLibrary, bindingContext);
-        ExpressionCodegen codegen = new ExpressionCodegen(mv, bindingContext, frameMap,
-                typeMapper, Type.VOID_TYPE);
-        generateInitializers(aClass, kind, codegen, iv, typeMapper);
+        String classname = JetTypeMapper.jvmName(classDescriptor, kind);
+        final Type classType = Type.getType("L" + classname + ";");
+
+        if (kind == OwnerKind.DELEGATING_IMPLEMENTATION) {
+            String interfaceDesc = JetTypeMapper.jetInterfaceType(classDescriptor).getDescriptor();
+            v.visitField(Opcodes.ACC_PRIVATE, "$this", interfaceDesc, /*TODO*/null, null);
+            iv.load(1, argTypes[0]);
+            iv.putfield(classname, "$this", interfaceDesc);
+            frameMap.enterTemp();
+        }
+
+        for (int i = 0; i < paramDescrs.size(); i++) {
+            ValueParameterDescriptor parameter = paramDescrs.get(i);
+            frameMap.enter(parameter, argTypes[i].getSize());
+        }
+
+        List<JetDelegationSpecifier> specifiers = aClass.getDelegationSpecifiers();
+
+        if (specifiers.isEmpty() || !(specifiers.get(0) instanceof JetDelegatorToSuperCall)) {
+            String superClass = getSuperClass(aClass, kind);
+            iv.load(0, Type.getType("L" + superClass + ";"));
+            iv.invokespecial(superClass, "<init>", /* TODO super constructor descriptor */"()V");
+        }
+
+        int n = 0;
+        for (JetDelegationSpecifier specifier : specifiers) {
+            boolean delegateOnStack = specifier instanceof JetDelegatorToSuperCall && n > 0 ||
+                                      specifier instanceof JetDelegatorByExpressionSpecifier ;
+
+            if (delegateOnStack) {
+                iv.load(0, classType);
+            }
+
+            if (specifier instanceof JetDelegatorToSuperCall) {
+                JetDelegatorToSuperCall superCall = (JetDelegatorToSuperCall) specifier;
+                ConstructorDescriptor constructorDescriptor1 = bindingContext.resolveSuperConstructor(superCall, this);
+
+                ClassDescriptor classDecl = constructorDescriptor1.getContainingDeclaration();
+                boolean isDelegating = kind == OwnerKind.DELEGATING_IMPLEMENTATION;
+                Type type = isDelegating ? JetTypeMapper.jetDelegatingImplementationType(classDecl) : JetTypeMapper.jetImplementationType(classDecl);
+
+                if (n > 0) {
+                    if (kind == OwnerKind.DELEGATING_IMPLEMENTATION) {
+                        codegen.thisToStack();
+                    }
+                }
+
+                if (n == 0) {
+                    iv.load(0, type);
+                }
+                else {
+                    iv.anew(type);
+                    iv.dup();
+                }
+
+                Method method1 = typeMapper.mapConstructorSignature(constructorDescriptor1, kind);
+                final Type[] argTypes1 = method1.getArgumentTypes();
+                List<JetArgument> args = superCall.getValueArguments();
+                for (int i = 0, argsSize = args.size(); i < argsSize; i++) {
+                    JetArgument arg = args.get(i);
+                    codegen.gen(arg.getArgumentExpression(), argTypes1[i]);
+                }
+
+                iv.invokespecial(type.getClassName(), "<init>", method1.getDescriptor());
+            }
+            else if (specifier instanceof JetDelegatorByExpressionSpecifier) {
+                codegen.genToJVMStack(((JetDelegatorByExpressionSpecifier) specifier).getDelegateExpression());
+            }
+
+            if (delegateOnStack) {
+                JetType superType = bindingContext.resolveTypeReference(specifier.getTypeReference());
+                ClassDescriptor superClassDescriptor = (ClassDescriptor) superType.getConstructor().getDeclarationDescriptor();
+                String delegateField = "$delegate_" + n;
+                Type fieldType = JetTypeMapper.jetInterfaceType(superClassDescriptor);
+                String fieldDesc = fieldType.getDescriptor();
+                v.visitField(Opcodes.ACC_PRIVATE, delegateField, fieldDesc, /*TODO*/null, null);
+                iv.putfield(classname, delegateField, fieldDesc);
+
+                JetClass superClass = (JetClass) bindingContext.getDeclarationPsiElement(superClassDescriptor);
+                generateDelegates(aClass, superClass, v,
+                        new OwnerKind.DelegateKind(StackValue.field(fieldType, classname, delegateField, false),
+                        JetTypeMapper.jvmNameForInterface(superClassDescriptor)));
+            }
+
+            n++;
+        }
+
+        generateInitializers(aClass, kind, codegen, iv);
+
+        int curParam = 0;
+        List<JetParameter> constructorParameters = aClass.getPrimaryConstructorParameters();
+        for (JetParameter parameter : constructorParameters) {
+            if (parameter.getValOrVarNode() != null) {
+                VariableDescriptor descriptor = paramDescrs.get(curParam);
+                Type type = typeMapper.mapType(descriptor.getOutType());
+                iv.load(0, classType);
+                iv.load(frameMap.getIndex(descriptor), type);
+                iv.putfield(classname, descriptor.getName(), type.getDescriptor());
+            }
+            curParam++;
+        }
 
         iv.visitInsn(Opcodes.RETURN);
         mv.visitMaxs(0, 0);
         mv.visitEnd();
     }
 
-    private void generateInitializers(JetClass aClass, OwnerKind kind, ExpressionCodegen codegen, InstructionAdapter iv, JetTypeMapper typeMapper) {
+    private void generateInitializers(JetClass aClass, OwnerKind kind, ExpressionCodegen codegen, InstructionAdapter iv) {
         for (JetDeclaration declaration : aClass.getDeclarations()) {
             if (declaration instanceof JetProperty) {
                 final PropertyDescriptor propertyDescriptor = (PropertyDescriptor) bindingContext.getVariableDescriptor((JetProperty) declaration);
@@ -201,7 +304,7 @@ public class ClassCodegen {
 
     private void generateClassBody(JetClass aClass, ClassVisitor v, OwnerKind kind) {
         final JetStandardLibrary standardLibrary = JetStandardLibrary.getJetStandardLibrary(project);
-        final FunctionCodegen functionCodegen = new FunctionCodegen(v, standardLibrary, bindingContext);
+        final FunctionCodegen functionCodegen = new FunctionCodegen(aClass, v, standardLibrary, bindingContext);
         final PropertyCodegen propertyCodegen = new PropertyCodegen(v, standardLibrary, bindingContext, functionCodegen);
 
         for (JetDeclaration declaration : aClass.getDeclarations()) {
@@ -212,5 +315,56 @@ public class ClassCodegen {
                 functionCodegen.gen((JetFunction) declaration, kind);
             }
         }
+
+        for (JetParameter p : aClass.getPrimaryConstructorParameters()) {
+            if (p.getValOrVarNode() != null) {
+                VariableDescriptor descriptor = bindingContext.getParameterDescriptor(p);
+                if (descriptor instanceof PropertyDescriptor) {
+                    PropertyDescriptor propertyDescriptor = (PropertyDescriptor) descriptor;
+                    propertyCodegen.generateDefaultGetter(propertyDescriptor, Opcodes.ACC_PUBLIC, kind);
+                    if (propertyDescriptor.isVar()) {
+                        propertyCodegen.generateDefaultSetter(propertyDescriptor, Opcodes.ACC_PUBLIC, kind);
+                    }
+
+                    if (!(kind instanceof OwnerKind.DelegateKind) && kind != OwnerKind.INTERFACE && bindingContext.hasBackingField(propertyDescriptor)) {
+                        v.visitField(Opcodes.ACC_PRIVATE, p.getName(), typeMapper.mapType(propertyDescriptor.getOutType()).getDescriptor(), null, null);
+                    }
+                }
+            }
+        }
+    }
+
+    private void generateDelegates(JetClass inClass, JetClass toClass, ClassVisitor v, OwnerKind kind) {
+        final JetStandardLibrary standardLibrary = JetStandardLibrary.getJetStandardLibrary(project);
+        final FunctionCodegen functionCodegen = new FunctionCodegen(toClass, v, standardLibrary, bindingContext);
+        final PropertyCodegen propertyCodegen = new PropertyCodegen(v, standardLibrary, bindingContext, functionCodegen);
+
+/* TODO
+        for (JetDeclaration declaration : toClass.getDeclarations()) {
+            if (declaration instanceof JetProperty) {
+                propertyCodegen.gen((JetProperty) declaration, kind);
+            }
+            else if (declaration instanceof JetFunction) {
+                functionCodegen.gen((JetFunction) declaration, kind);
+            }
+        }
+*/
+
+        for (JetParameter p : toClass.getPrimaryConstructorParameters()) {
+            if (p.getValOrVarNode() != null) {
+                VariableDescriptor descriptor = bindingContext.getParameterDescriptor(p);
+                if (descriptor instanceof PropertyDescriptor) {
+                    PropertyDescriptor propertyDescriptor = (PropertyDescriptor) descriptor;
+                    propertyCodegen.generateDefaultGetter(propertyDescriptor, Opcodes.ACC_PUBLIC, kind);
+                    if (propertyDescriptor.isVar()) {
+                        propertyCodegen.generateDefaultSetter(propertyDescriptor, Opcodes.ACC_PUBLIC, kind);
+                    }
+
+                    if (!(kind instanceof OwnerKind.DelegateKind) && kind != OwnerKind.INTERFACE && bindingContext.hasBackingField(propertyDescriptor)) {
+                        v.visitField(Opcodes.ACC_PRIVATE, p.getName(), typeMapper.mapType(propertyDescriptor.getOutType()).getDescriptor(), null, null);
+                    }
+                }
+            }
+        }
     }
 }
diff --git a/idea/src/org/jetbrains/jet/codegen/ExpressionCodegen.java b/idea/src/org/jetbrains/jet/codegen/ExpressionCodegen.java
index 93e0df63f92..ea00ced7f68 100644
--- a/idea/src/org/jetbrains/jet/codegen/ExpressionCodegen.java
+++ b/idea/src/org/jetbrains/jet/codegen/ExpressionCodegen.java
@@ -1,7 +1,11 @@
 package org.jetbrains.jet.codegen;
 
+import com.intellij.openapi.project.Project;
 import com.intellij.psi.*;
+import com.intellij.psi.search.ProjectScope;
 import com.intellij.psi.tree.IElementType;
+import com.intellij.psi.util.PsiTreeUtil;
+import jet.IntRange;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.psi.*;
 import org.jetbrains.jet.lang.resolve.BindingContext;
@@ -15,6 +19,7 @@ import org.objectweb.asm.Type;
 import org.objectweb.asm.commons.InstructionAdapter;
 import org.objectweb.asm.commons.Method;
 
+import java.util.Iterator;
 import java.util.List;
 import java.util.Stack;
 
@@ -26,6 +31,18 @@ public class ExpressionCodegen extends JetVisitor {
     private static final String CLASS_STRING = "java/lang/String";
     private static final String CLASS_STRING_BUILDER = "java/lang/StringBuilder";
     private static final String CLASS_COMPARABLE = "java/lang/Comparable";
+    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>();
@@ -35,13 +52,22 @@ public class ExpressionCodegen extends JetVisitor {
     private final FrameMap myMap;
     private final JetTypeMapper typeMapper;
     private final Type returnType;
+    private final ClassDescriptor contextType;
+    private final OwnerKind contextKind;
     private final BindingContext bindingContext;
 
-    public ExpressionCodegen(MethodVisitor v, BindingContext bindingContext, FrameMap myMap, JetTypeMapper typeMapper,
-                             Type returnType) {
+    public ExpressionCodegen(MethodVisitor v,
+                             BindingContext bindingContext,
+                             FrameMap myMap,
+                             JetTypeMapper typeMapper,
+                             Type returnType,
+                             ClassDescriptor contextType,
+                             OwnerKind contextKind) {
         this.myMap = myMap;
         this.typeMapper = typeMapper;
         this.returnType = returnType;
+        this.contextType = contextType;
+        this.contextKind = contextKind;
         this.v = new InstructionAdapter(v);
         this.bindingContext = bindingContext;
     }
@@ -51,7 +77,7 @@ public class ExpressionCodegen extends JetVisitor {
         expr.accept(this);
     }
 
-    private void gen(JetElement expr, Type type) {
+    public void gen(JetElement expr, Type type) {
         int oldStackDepth = myStack.size();
         gen(expr);
         if (myStack.size() == oldStackDepth+1) {
@@ -174,12 +200,23 @@ public class ExpressionCodegen extends JetVisitor {
     @Override
     public void visitForExpression(JetForExpression expression) {
         final JetExpression loopRange = expression.getLoopRange();
-        Type loopRangeType = expressionType(loopRange);
+        final JetType expressionType = bindingContext.getExpressionType(loopRange);
+        Type loopRangeType = typeMapper.mapType(expressionType);
         if (loopRangeType.getSort() == Type.ARRAY) {
             generateForInArray(expression, loopRangeType);
         }
         else {
-            throw new UnsupportedOperationException("for/in loop currently only supported for arrays");
+            final DeclarationDescriptor descriptor = expressionType.getConstructor().getDeclarationDescriptor();
+            final PsiElement declaration = bindingContext.getDeclarationPsiElement(descriptor);
+            if (declaration instanceof PsiClass) {
+                final Project project = declaration.getProject();
+                final PsiClass iterable = JavaPsiFacade.getInstance(project).findClass("java.lang.Iterable", ProjectScope.getAllScope(project));
+                if (((PsiClass) declaration).isInheritor(iterable, true)) {
+                    generateForInIterable(expression, loopRangeType);
+                    return;
+                }
+            }
+            throw new UnsupportedOperationException("for/in loop currently only supported for arrays and Iterable instances");
         }
     }
 
@@ -230,6 +267,48 @@ public class ExpressionCodegen extends JetVisitor {
         myContinueTargets.pop();
     }
 
+    private void generateForInIterable(JetForExpression expression, Type loopRangeType) {
+        final JetParameter loopParameter = expression.getLoopParameter();
+        final VariableDescriptor parameterDescriptor = bindingContext.getParameterDescriptor(loopParameter);
+        JetType paramType = parameterDescriptor.getOutType();
+        Type asmParamType = typeMapper.mapType(paramType);
+
+        int iteratorVar = myMap.enterTemp();
+        gen(expression.getLoopRange(), loopRangeType);
+        v.invokeinterface(CLASS_ITERABLE, "iterator", ITERABLE_ITERATOR_DESCRIPTOR);
+        v.store(iteratorVar, ITERATOR_TYPE);
+
+        Label begin = new Label();
+        Label end = new Label();
+        myContinueTargets.push(begin);
+        myBreakTargets.push(end);
+
+        v.mark(begin);
+        v.load(iteratorVar, ITERATOR_TYPE);
+        v.invokeinterface(CLASS_ITERATOR, "hasNext", ITERATOR_HASNEXT_DESCRIPTOR);
+        v.ifeq(end);
+
+        myMap.enter(parameterDescriptor, asmParamType.getSize());
+        v.load(iteratorVar, ITERATOR_TYPE);
+        v.invokeinterface(CLASS_ITERATOR, "next", ITERATOR_NEXT_DESCRIPTOR);
+        // TODO checkcast should be generated via StackValue
+        if (asmParamType.getSort() == Type.OBJECT && !"java.lang.Object".equals(asmParamType.getClassName())) {
+            v.checkcast(asmParamType);
+        }
+        v.store(myMap.getIndex(parameterDescriptor), asmParamType);
+
+        gen(expression.getBody(), Type.VOID_TYPE);
+
+        v.goTo(begin);
+        v.mark(end);
+
+        int paramIndex = myMap.leave(parameterDescriptor);
+        v.visitLocalVariable(loopParameter.getName(), asmParamType.getDescriptor(), null, begin, end, paramIndex);
+        myMap.leaveTemp();
+        myBreakTargets.pop();
+        myContinueTargets.pop();
+    }
+
     @Override
     public void visitBreakExpression(JetBreakExpression expression) {
         JetSimpleNameExpression labelElement = expression.getTargetLabel();
@@ -370,6 +449,23 @@ public class ExpressionCodegen extends JetVisitor {
             }
             else if (descriptor instanceof PropertyDescriptor) {
                 final PropertyDescriptor propertyDescriptor = (PropertyDescriptor) descriptor;
+
+                //TODO: hack, will not need if resolve goes to right descriptor itself
+                if (declaration instanceof JetParameter) {
+                    if (PsiTreeUtil.getParentOfType(expression, JetDelegationSpecifier.class)  != null) {
+                        JetClass aClass = PsiTreeUtil.getParentOfType(expression, JetClass.class);
+                        ConstructorDescriptor constructorDescriptor = bindingContext.getConstructorDescriptor(aClass);
+                        List<ValueParameterDescriptor> parameters = constructorDescriptor.getUnsubstitutedValueParameters();
+                        for (ValueParameterDescriptor parameter : parameters) {
+                            if (parameter.getName().equals(descriptor.getName())) {
+                                final JetType outType = ((VariableDescriptor) descriptor).getOutType();
+                                myStack.push(StackValue.local(myMap.getIndex(parameter), typeMapper.mapType(outType)));
+                                return;
+                            }
+                        }
+                    }
+                }
+
                 boolean isStatic = descriptor.getContainingDeclaration() instanceof NamespaceDescriptor;
                 final boolean directToField = expression.getReferencedNameElementType() == JetTokens.FIELD_IDENTIFIER;
                 final StackValue iValue = intermediateValueForProperty(propertyDescriptor, directToField);
@@ -388,6 +484,7 @@ public class ExpressionCodegen extends JetVisitor {
         boolean isStatic = propertyDescriptor.getContainingDeclaration() instanceof NamespaceDescriptor;
         String owner = JetTypeMapper.getOwner(propertyDescriptor);
         final JetType outType = propertyDescriptor.getOutType();
+        boolean isInsideClass = propertyDescriptor.getContainingDeclaration() == contextType;
         Method getter;
         Method setter;
         if (directToField) {
@@ -395,8 +492,8 @@ public class ExpressionCodegen extends JetVisitor {
             setter = null;
         }
         else {
-            getter = propertyDescriptor.getGetter() == null ? null : typeMapper.mapGetterSignature(propertyDescriptor);
-            setter = propertyDescriptor.getSetter() == null ? null : typeMapper.mapSetterSignature(propertyDescriptor);
+            getter = isInsideClass && propertyDescriptor.getGetter() == null ? null : typeMapper.mapGetterSignature(propertyDescriptor);
+            setter = isInsideClass && propertyDescriptor.getSetter() == null ? null : typeMapper.mapSetterSignature(propertyDescriptor);
         }
         return StackValue.property(propertyDescriptor.getName(), owner, typeMapper.mapType(outType), isStatic, getter, setter);
     }
@@ -633,6 +730,9 @@ 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) {
@@ -743,6 +843,21 @@ 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;
@@ -819,25 +934,44 @@ public class ExpressionCodegen extends JetVisitor {
     private void generateAugmentedAssignment(JetBinaryExpression expression) {
         DeclarationDescriptor op = bindingContext.resolveReferenceExpression(expression.getOperationReference());
         final JetExpression lhs = expression.getLeft();
-        Type asmType = expressionType(lhs);
-        StackValue value = generateIntermediateValue(lhs);
-        value.dupReceiver(v);
-        value.put(asmType, v);
-        genToJVMStack(expression.getRight());
-        v.visitInsn(asmType.getOpcode(opcodeForMethod(op.getName())));
-        value.store(v);
+        Type lhsType = expressionType(lhs);
+        if (isNumberPrimitive(lhsType)) {
+            StackValue value = generateIntermediateValue(lhs);              // receiver
+            value.dupReceiver(v, 0);                                        // receiver receiver
+            value.put(lhsType, v);                                          // receiver lhs
+            genToJVMStack(expression.getRight());                           // receiver lhs rhs
+            v.visitInsn(lhsType.getOpcode(opcodeForMethod(op.getName())));  // receiver result
+            value.store(v);
+        }
+        else if ("java.lang.String".equals(lhsType.getClassName()) && op.getName().equals("plus")) {
+            generateStringBuilderConstructor();                          // StringBuilder
+            StackValue value = generateIntermediateValue(lhs);           // StringBuilder receiver
+            value.dupReceiver(v, 1);                                     // receiver StringBuilder receiver
+            value.put(lhsType, v);                                       // receiver StringBuilder value
+            invokeAppendMethod(lhsType);                                 // receiver StringBuilder
+            invokeAppend(expression.getRight());                         // receiver StringBuilder
+            v.invokevirtual(CLASS_STRING_BUILDER, "toString", "()Ljava/lang/String;");
+            value.store(v);
+        }
+        else {
+            throw new UnsupportedOperationException("Augmented assignment for non-primitive types not yet implemented");
+        }
     }
 
     private void generateConcatenation(JetBinaryExpression expression) {
+        generateStringBuilderConstructor();
+        invokeAppend(expression.getLeft());
+        invokeAppend(expression.getRight());
+        v.invokevirtual(CLASS_STRING_BUILDER, "toString", "()Ljava/lang/String;");
+        myStack.push(StackValue.onStack(Type.getObjectType(CLASS_STRING)));
+    }
+
+    private void generateStringBuilderConstructor() {
         Type type = Type.getObjectType(CLASS_STRING_BUILDER);
         v.anew(type);
         v.dup();
         Method method = new Method("<init>", Type.VOID_TYPE, new Type[0]);
         v.invokespecial(CLASS_STRING_BUILDER, method.getName(), method.getDescriptor());
-        invokeAppend(expression.getLeft());
-        invokeAppend(expression.getRight());
-        v.invokevirtual(CLASS_STRING_BUILDER, "toString", "()Ljava/lang/String;");
-        myStack.push(StackValue.onStack(Type.getObjectType(CLASS_STRING)));
     }
 
     private void invokeAppend(final JetExpression expr) {
@@ -851,6 +985,10 @@ public class ExpressionCodegen extends JetVisitor {
         }
         Type exprType = expressionType(expr);
         gen(expr, exprType);
+        invokeAppendMethod(exprType);
+    }
+
+    private void invokeAppendMethod(Type exprType) {
         Method appendDescriptor = new Method("append", Type.getObjectType(CLASS_STRING_BUILDER),
                 new Type[] { exprType.getSort() == Type.OBJECT ? JetTypeMapper.TYPE_OBJECT : exprType});
         v.invokevirtual(CLASS_STRING_BUILDER, "append", appendDescriptor.getDescriptor());
@@ -925,7 +1063,7 @@ public class ExpressionCodegen extends JetVisitor {
             }
         }
         StackValue value = generateIntermediateValue(operand);
-        value.dupReceiver(v);
+        value.dupReceiver(v, 0);
         value.put(asmType, v);
         if (asmType == Type.LONG_TYPE) {
             v.aconst(Long.valueOf(increment));
@@ -989,7 +1127,7 @@ public class ExpressionCodegen extends JetVisitor {
             v.anew(type);
             v.dup();
 
-            Method method = typeMapper.mapConstructorSignature((ConstructorDescriptor) constructorDescriptor);
+            Method method = typeMapper.mapConstructorSignature((ConstructorDescriptor) constructorDescriptor, OwnerKind.IMPLEMENTATION);
             pushMethodArguments(expression, method);
             v.invokespecial(JetTypeMapper.jvmNameForImplementation(classDecl), "<init>", method.getDescriptor());
             myStack.push(StackValue.onStack(type));
@@ -1031,6 +1169,27 @@ public class ExpressionCodegen extends JetVisitor {
         v.athrow();
     }
 
+    @Override
+    public void visitThisExpression(JetThisExpression expression) {
+        thisToStack();
+    }
+
+    public void thisToStack() {
+        if (contextKind == OwnerKind.NAMESPACE) {
+            throw new UnsupportedOperationException("Cannot generate this expression in top level context");
+        }
+
+        if (contextKind == OwnerKind.IMPLEMENTATION) {
+            v.load(0, JetTypeMapper.jetImplementationType(contextType));
+        }
+        else if (contextKind == OwnerKind.DELEGATING_IMPLEMENTATION) {
+            v.getfield(JetTypeMapper.jvmName(contextType, contextKind), "$this", JetTypeMapper.jetInterfaceType(contextType).getDescriptor());
+        }
+        else {
+            throw new UnsupportedOperationException("Unknown kind: " + contextKind);
+        }
+    }
+
     private static class CompilationException extends RuntimeException {
     }
 }
diff --git a/idea/src/org/jetbrains/jet/codegen/FunctionCodegen.java b/idea/src/org/jetbrains/jet/codegen/FunctionCodegen.java
index 5516b2e7961..1573e81aebd 100644
--- a/idea/src/org/jetbrains/jet/codegen/FunctionCodegen.java
+++ b/idea/src/org/jetbrains/jet/codegen/FunctionCodegen.java
@@ -15,34 +15,18 @@ import java.util.List;
  * @author max
  */
 public class FunctionCodegen {
+    private final JetDeclaration owner;
     private final ClassVisitor v;
     private final BindingContext bindingContext;
-    private final JetStandardLibrary standardLibrary;
     private final JetTypeMapper typeMapper;
 
-    public FunctionCodegen(ClassVisitor v, JetStandardLibrary standardLibrary, BindingContext bindingContext) {
+    public FunctionCodegen(JetDeclaration owner, ClassVisitor v, JetStandardLibrary standardLibrary, BindingContext bindingContext) {
+        this.owner = owner;
         this.v = v;
         this.bindingContext = bindingContext;
-        this.standardLibrary = standardLibrary;
         typeMapper = new JetTypeMapper(standardLibrary, bindingContext);
     }
 
-    public void genInNamespace(JetFunction f) {
-        gen(f, OwnerKind.NAMESPACE);
-    }
-
-    public void genInInterface(JetFunction f) {
-        gen(f, OwnerKind.INTERFACE);
-    }
-
-    public void genInImplementation(JetFunction f) {
-
-    }
-
-    public void genInDelegatingImplementation(JetFunction f) {
-
-    }
-
     public void gen(JetFunction f, OwnerKind kind) {
         Method method = typeMapper.mapSignature(f);
         List<ValueParameterDescriptor> paramDescrs = bindingContext.getFunctionDescriptor(f).getUnsubstitutedValueParameters();
@@ -59,6 +43,8 @@ public class FunctionCodegen {
         boolean isAbstract = kind == OwnerKind.INTERFACE || bodyExpression == null;
         if (isAbstract) flags |= Opcodes.ACC_ABSTRACT;
 
+        ClassDescriptor ownerClass = owner instanceof JetClass ? bindingContext.getClassDescriptor((JetClass) owner) : null;
+
         final MethodVisitor mv = v.visitMethod(flags, jvmSignature.getName(), jvmSignature.getDescriptor(), null, null);
         if (kind != OwnerKind.INTERFACE) {
             mv.visitCode();
@@ -74,7 +60,7 @@ public class FunctionCodegen {
                 frameMap.enter(parameter, argTypes[i].getSize());
             }
 
-            ExpressionCodegen codegen = new ExpressionCodegen(mv, bindingContext, frameMap, typeMapper, jvmSignature.getReturnType());
+            ExpressionCodegen codegen = new ExpressionCodegen(mv, bindingContext, frameMap, typeMapper, jvmSignature.getReturnType(), ownerClass, kind);
             bodyExpression.accept(codegen);
             generateReturn(mv, bodyExpression, codegen);
             mv.visitMaxs(0, 0);
diff --git a/idea/src/org/jetbrains/jet/codegen/JetTypeMapper.java b/idea/src/org/jetbrains/jet/codegen/JetTypeMapper.java
index f97d8919a4f..eb6e313936b 100644
--- a/idea/src/org/jetbrains/jet/codegen/JetTypeMapper.java
+++ b/idea/src/org/jetbrains/jet/codegen/JetTypeMapper.java
@@ -31,6 +31,22 @@ public class JetTypeMapper {
         return psiClass.getQualifiedName().replace(".", "/");
     }
 
+    static String jvmName(ClassDescriptor jetClass, OwnerKind kind) {
+        if (kind == OwnerKind.INTERFACE) {
+            return jvmNameForInterface(jetClass);
+        }
+        else if (kind == OwnerKind.IMPLEMENTATION) {
+            return jvmNameForImplementation(jetClass);
+        }
+        else if (kind == OwnerKind.DELEGATING_IMPLEMENTATION) {
+            return jvmNameForDelegatingImplementation(jetClass);
+        }
+        else {
+            assert false : "Unsuitable kind";
+            return "java/lang/Object";
+        }
+    }
+
     static Type psiClassType(PsiClass psiClass) {
         return Type.getType("L" + jvmName(psiClass) + ";");
     }
@@ -43,6 +59,10 @@ public class JetTypeMapper {
         return Type.getType("L" + jvmNameForImplementation(classDescriptor) + ";");
     }
 
+    static Type jetDelegatingImplementationType(ClassDescriptor classDescriptor) {
+        return Type.getType("L" + jvmNameForDelegatingImplementation(classDescriptor) + ";");
+    }
+
     static String jvmName(JetNamespace namespace) {
         return NamespaceCodegen.getJVMClassName(namespace.getFQName());
     }
@@ -79,7 +99,7 @@ public class JetTypeMapper {
     }
 
     public Type mapType(final JetType jetType) {
-        if (jetType.equals(JetStandardClasses.getUnitType())) {
+        if (jetType.equals(JetStandardClasses.getUnitType()) || jetType.equals(JetStandardClasses.getNothingType())) {
             return Type.VOID_TYPE;
         }
         if (jetType.equals(standardLibrary.getIntType())) {
@@ -183,17 +203,27 @@ public class JetTypeMapper {
     }
 
     public Method mapSetterSignature(PropertyDescriptor descriptor) {
-        Type paramType = mapType(descriptor.getInType());
+        final JetType inType = descriptor.getInType();
+        if (inType == null) {
+            return null;
+        }
+        Type paramType = mapType(inType);
         return new Method(PropertyCodegen.setterName(descriptor.getName()), Type.VOID_TYPE, new Type[] { paramType });
     }
 
-    public Method mapConstructorSignature(ConstructorDescriptor descriptor) {
+    public Method mapConstructorSignature(ConstructorDescriptor descriptor, OwnerKind kind) {
+        boolean delegate = kind == OwnerKind.DELEGATING_IMPLEMENTATION;
         List<ValueParameterDescriptor> parameters = descriptor.getUnsubstitutedValueParameters();
-        Type[] parameterTypes = new Type[parameters.size()];
-        for (int i = 0; i < parameters.size(); i++) {
-            parameterTypes[i] = mapType(parameters.get(i).getOutType());
+        int count = parameters.size();
+        int first = delegate ? 1 : 0;
+        Type[] parameterTypes = new Type[count + first];
+        if (delegate) {
+            parameterTypes[0] = jetInterfaceType(descriptor.getContainingDeclaration());
+        }
+
+        for (int i = 0; i < count; i++) {
+            parameterTypes[i + first] = mapType(parameters.get(i).getOutType());
         }
-        Type returnType = mapType(descriptor.getUnsubstitutedReturnType());
         return new Method("<init>", Type.VOID_TYPE, parameterTypes);
     }
 
diff --git a/idea/src/org/jetbrains/jet/codegen/NamespaceCodegen.java b/idea/src/org/jetbrains/jet/codegen/NamespaceCodegen.java
index 6bc2993f05c..8e9f45afcbb 100644
--- a/idea/src/org/jetbrains/jet/codegen/NamespaceCodegen.java
+++ b/idea/src/org/jetbrains/jet/codegen/NamespaceCodegen.java
@@ -41,7 +41,7 @@ public class NamespaceCodegen {
         BindingContext bindingContext = AnalyzingUtils.analyzeNamespace(namespace, ErrorHandler.THROW_EXCEPTION);
 
         final JetStandardLibrary standardLibrary = JetStandardLibrary.getJetStandardLibrary(project);
-        final FunctionCodegen functionCodegen = new FunctionCodegen(v, standardLibrary, bindingContext);
+        final FunctionCodegen functionCodegen = new FunctionCodegen(namespace, v, standardLibrary, bindingContext);
         final PropertyCodegen propertyCodegen = new PropertyCodegen(v, standardLibrary, bindingContext, functionCodegen);
         final ClassCodegen classCodegen = codegens.forClass(bindingContext);
 
@@ -51,10 +51,10 @@ public class NamespaceCodegen {
 
         for (JetDeclaration declaration : namespace.getDeclarations()) {
             if (declaration instanceof JetProperty) {
-                propertyCodegen.genInNamespace((JetProperty) declaration);
+                propertyCodegen.gen((JetProperty) declaration, OwnerKind.NAMESPACE);
             }
             else if (declaration instanceof JetFunction) {
-                functionCodegen.genInNamespace((JetFunction) declaration);
+                functionCodegen.gen((JetFunction) declaration, OwnerKind.NAMESPACE);
             }
             else if (declaration instanceof JetClass) {
                 classCodegen.generate((JetClass) declaration);
@@ -70,8 +70,7 @@ public class NamespaceCodegen {
 
         FrameMap frameMap = new FrameMap();
         JetTypeMapper typeMapper = new JetTypeMapper(JetStandardLibrary.getJetStandardLibrary(namespace.getProject()), bindingContext);
-        ExpressionCodegen codegen = new ExpressionCodegen(mv, bindingContext, frameMap,
-                typeMapper, Type.VOID_TYPE);
+        ExpressionCodegen codegen = new ExpressionCodegen(mv, bindingContext, frameMap, typeMapper, Type.VOID_TYPE, null, OwnerKind.NAMESPACE);
 
         for (JetDeclaration declaration : namespace.getDeclarations()) {
             if (declaration instanceof JetProperty) {
diff --git a/idea/src/org/jetbrains/jet/codegen/OwnerKind.java b/idea/src/org/jetbrains/jet/codegen/OwnerKind.java
index 7e1b1545dfb..3f183132f1a 100644
--- a/idea/src/org/jetbrains/jet/codegen/OwnerKind.java
+++ b/idea/src/org/jetbrains/jet/codegen/OwnerKind.java
@@ -1,11 +1,31 @@
 package org.jetbrains.jet.codegen;
 
+import org.objectweb.asm.Type;
+
 /**
  * @author max
  */
-public enum OwnerKind {
-    NAMESPACE,
-    INTERFACE,
-    IMPLEMENTATION,
-    DELEGATING_IMPLEMENTATION
+public class OwnerKind {
+    public static final OwnerKind NAMESPACE = new OwnerKind();
+    public static final OwnerKind INTERFACE = new OwnerKind();
+    public static final OwnerKind IMPLEMENTATION = new OwnerKind();
+    public static final OwnerKind DELEGATING_IMPLEMENTATION = new OwnerKind();
+
+    public static class DelegateKind extends OwnerKind {
+        private final StackValue delegate;
+        private final String ownerClass;
+
+        public DelegateKind(StackValue delegate, String ownerClass) {
+            this.delegate = delegate;
+            this.ownerClass = ownerClass;
+        }
+
+        public StackValue getDelegate() {
+            return delegate;
+        }
+
+        public String getOwnerClass() {
+            return ownerClass;
+        }
+    }
 }
diff --git a/idea/src/org/jetbrains/jet/codegen/PropertyCodegen.java b/idea/src/org/jetbrains/jet/codegen/PropertyCodegen.java
index f22d242d193..fec3d046adc 100644
--- a/idea/src/org/jetbrains/jet/codegen/PropertyCodegen.java
+++ b/idea/src/org/jetbrains/jet/codegen/PropertyCodegen.java
@@ -29,22 +29,6 @@ public class PropertyCodegen {
         this.mapper = new JetTypeMapper(standardLibrary, context);
     }
 
-    public void genInNamespace(JetProperty p) {
-       gen(p, OwnerKind.NAMESPACE);
-    }
-
-    public void genInInterface(JetProperty p) {
-
-    }
-
-    public void genInImplementation(JetProperty p) {
-        gen(p, OwnerKind.IMPLEMENTATION);
-    }
-
-    public void genInDelegatingImplementation(JetProperty p) {
-        gen(p, OwnerKind.DELEGATING_IMPLEMENTATION);
-    }
-
     public void gen(JetProperty p, OwnerKind kind) {
         final VariableDescriptor descriptor = context.getVariableDescriptor(p);
         if (!(descriptor instanceof PropertyDescriptor)) {
@@ -85,9 +69,13 @@ public class PropertyCodegen {
                     value = ((JetConstantExpression) initializer).getValue();
                 }
             }
-            int modifiers = Opcodes.ACC_PRIVATE;
+            final int modifiers;
             if (kind == OwnerKind.NAMESPACE) {
-                modifiers |= Opcodes.ACC_STATIC;
+                int access = isExternallyAccessible(p) ? Opcodes.ACC_PUBLIC : Opcodes.ACC_PRIVATE;
+                modifiers = access | Opcodes.ACC_STATIC;
+            }
+            else {
+                modifiers = Opcodes.ACC_PRIVATE;
             }
             v.visitField(modifiers, p.getName(), mapper.mapType(propertyDescriptor.getOutType()).getDescriptor(), null, value);
         }
@@ -134,49 +122,78 @@ public class PropertyCodegen {
     private void generateDefaultGetter(JetProperty p, JetDeclaration declaration, OwnerKind kind) {
         final PropertyDescriptor propertyDescriptor = (PropertyDescriptor) context.getVariableDescriptor(p);
         int flags = JetTypeMapper.getAccessModifiers(declaration, Opcodes.ACC_PUBLIC);
+        generateDefaultGetter(propertyDescriptor, flags, kind);
+    }
+
+    public void generateDefaultGetter(PropertyDescriptor propertyDescriptor, int flags, OwnerKind kind) {
         if (kind == OwnerKind.NAMESPACE) {
             flags |= Opcodes.ACC_STATIC;
         }
-        final String signature = mapper.mapGetterSignature(propertyDescriptor).getDescriptor();
-        MethodVisitor mv = v.visitMethod(flags, getterName(p.getName()), signature, null, null);
-        mv.visitCode();
-        InstructionAdapter iv = new InstructionAdapter(mv);
-        if (kind != OwnerKind.NAMESPACE) {
-            iv.load(0, JetTypeMapper.TYPE_OBJECT);
+        else if (kind == OwnerKind.INTERFACE) {
+            flags |= Opcodes.ACC_ABSTRACT;
+        }
+
+        final String signature = mapper.mapGetterSignature(propertyDescriptor).getDescriptor();
+        String getterName = getterName(propertyDescriptor.getName());
+        MethodVisitor mv = v.visitMethod(flags, getterName, signature, null, null);
+        if (kind != OwnerKind.INTERFACE) {
+            mv.visitCode();
+            InstructionAdapter iv = new InstructionAdapter(mv);
+            if (kind != OwnerKind.NAMESPACE) {
+                iv.load(0, JetTypeMapper.TYPE_OBJECT);
+            }
+            final Type type = mapper.mapType(propertyDescriptor.getOutType());
+            if (kind instanceof OwnerKind.DelegateKind) {
+                OwnerKind.DelegateKind dk = (OwnerKind.DelegateKind) kind;
+                dk.getDelegate().put(JetTypeMapper.TYPE_OBJECT, iv);
+                iv.invokeinterface(dk.getOwnerClass(), getterName, signature);
+            }
+            else {
+                iv.visitFieldInsn(kind == OwnerKind.NAMESPACE ? Opcodes.GETSTATIC : Opcodes.GETFIELD,
+                        JetTypeMapper.getOwner(propertyDescriptor), propertyDescriptor.getName(),
+                        type.getDescriptor());
+            }
+            iv.areturn(type);
+            mv.visitMaxs(0, 0);
+            mv.visitEnd();
         }
-        final Type type = mapper.mapType(propertyDescriptor.getOutType());
-        iv.visitFieldInsn(kind == OwnerKind.NAMESPACE ? Opcodes.GETSTATIC : Opcodes.GETFIELD,
-                JetTypeMapper.getOwner(propertyDescriptor), propertyDescriptor.getName(),
-                type.getDescriptor());
-        iv.areturn(type);
-        mv.visitMaxs(0, 0);
-        mv.visitEnd();
     }
 
     private void generateDefaultSetter(JetProperty p, JetDeclaration declaration, OwnerKind kind) {
         final PropertyDescriptor propertyDescriptor = (PropertyDescriptor) context.getVariableDescriptor(p);
         int flags = JetTypeMapper.getAccessModifiers(declaration, Opcodes.ACC_PUBLIC);
+        generateDefaultSetter(propertyDescriptor, flags, kind);
+    }
+
+    public void generateDefaultSetter(PropertyDescriptor propertyDescriptor, int flags, OwnerKind kind) {
         if (kind == OwnerKind.NAMESPACE) {
             flags |= Opcodes.ACC_STATIC;
         }
+        else if (kind == OwnerKind.INTERFACE) {
+            flags |= Opcodes.ACC_ABSTRACT;
+        }
+
         final String signature = mapper.mapSetterSignature(propertyDescriptor).getDescriptor();
-        MethodVisitor mv = v.visitMethod(flags, setterName(p.getName()), signature, null, null);
-        mv.visitCode();
-        InstructionAdapter iv = new InstructionAdapter(mv);
-        final Type type = mapper.mapType(propertyDescriptor.getOutType());
-        if (kind != OwnerKind.NAMESPACE) {
-            iv.load(0, JetTypeMapper.TYPE_OBJECT);
-            iv.load(1, type);
+        MethodVisitor mv = v.visitMethod(flags, setterName(propertyDescriptor.getName()), signature, null, null);
+        if (kind != OwnerKind.INTERFACE) {
+            mv.visitCode();
+            InstructionAdapter iv = new InstructionAdapter(mv);
+            final Type type = mapper.mapType(propertyDescriptor.getOutType());
+            if (kind != OwnerKind.NAMESPACE) {
+                iv.load(0, JetTypeMapper.TYPE_OBJECT);
+                iv.load(1, type);
+            }
+            else {
+                iv.load(0, type);
+            }
+            //TODO: kind inst Delegate
+            iv.visitFieldInsn(kind == OwnerKind.NAMESPACE ? Opcodes.PUTSTATIC : Opcodes.PUTFIELD,
+                    JetTypeMapper.getOwner(propertyDescriptor), propertyDescriptor.getName(),
+                    type.getDescriptor());
+            iv.visitInsn(Opcodes.RETURN);
+            mv.visitMaxs(0, 0);
+            mv.visitEnd();
         }
-        else {
-            iv.load(0, type);
-        }
-        iv.visitFieldInsn(kind == OwnerKind.NAMESPACE ? Opcodes.PUTSTATIC : Opcodes.PUTFIELD,
-                JetTypeMapper.getOwner(propertyDescriptor), propertyDescriptor.getName(),
-                type.getDescriptor());
-        iv.visitInsn(Opcodes.RETURN);
-        mv.visitMaxs(0, 0);
-        mv.visitEnd();
     }
 
     public static String getterName(String propertyName) {
diff --git a/idea/src/org/jetbrains/jet/codegen/StackValue.java b/idea/src/org/jetbrains/jet/codegen/StackValue.java
index ae3ea002e42..dc33d4e9daa 100644
--- a/idea/src/org/jetbrains/jet/codegen/StackValue.java
+++ b/idea/src/org/jetbrains/jet/codegen/StackValue.java
@@ -24,7 +24,7 @@ public abstract class StackValue {
         throw new UnsupportedOperationException("cannot store to value " + this);
     }
 
-    public void dupReceiver(InstructionAdapter v) {
+    public void dupReceiver(InstructionAdapter v, int below) {
     }
 
     public void condJump(Label label, boolean jumpIfFalse, InstructionAdapter v) {
@@ -341,8 +341,13 @@ public abstract class StackValue {
         }
 
         @Override
-        public void dupReceiver(InstructionAdapter v) {
-            v.dup2();   // array and index
+        public void dupReceiver(InstructionAdapter v, int below) {
+            if (below == 1) {
+                v.dup2X1();
+            }
+            else {
+                v.dup2();   // array and index
+            }
         }
     }
 
@@ -364,8 +369,15 @@ public abstract class StackValue {
         }
 
         @Override
-        public void dupReceiver(InstructionAdapter v) {
-            if (!isStatic) v.dup();
+        public void dupReceiver(InstructionAdapter v, int below) {
+            if (!isStatic) {
+                if (below == 1) {
+                    v.dupX1();
+                }
+                else {
+                    v.dup();
+                }
+            }
         }
 
         @Override
diff --git a/idea/src/org/jetbrains/jet/lang/resolve/BindingContext.java b/idea/src/org/jetbrains/jet/lang/resolve/BindingContext.java
index 5872c5b59f7..0ffff7aef1f 100644
--- a/idea/src/org/jetbrains/jet/lang/resolve/BindingContext.java
+++ b/idea/src/org/jetbrains/jet/lang/resolve/BindingContext.java
@@ -1,6 +1,7 @@
 package org.jetbrains.jet.lang.resolve;
 
 import com.intellij.psi.PsiElement;
+import org.jetbrains.jet.codegen.ClassCodegen;
 import org.jetbrains.jet.lang.psi.*;
 import org.jetbrains.jet.lang.types.*;
 
@@ -29,4 +30,6 @@ public interface BindingContext {
     boolean isBlock(JetFunctionLiteralExpression expression);
     boolean isStatement(JetExpression expression);
     boolean hasBackingField(PropertyDescriptor propertyDescriptor);
+
+    ConstructorDescriptor resolveSuperConstructor(JetDelegatorToSuperCall superCall, ClassCodegen classCodegen);
 }
diff --git a/idea/src/org/jetbrains/jet/lang/resolve/BindingTraceContext.java b/idea/src/org/jetbrains/jet/lang/resolve/BindingTraceContext.java
index 5ffed1525b0..6d12f8eb816 100644
--- a/idea/src/org/jetbrains/jet/lang/resolve/BindingTraceContext.java
+++ b/idea/src/org/jetbrains/jet/lang/resolve/BindingTraceContext.java
@@ -4,6 +4,7 @@ import com.google.common.collect.Maps;
 import com.intellij.psi.PsiElement;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.jetbrains.jet.codegen.ClassCodegen;
 import org.jetbrains.jet.lang.psi.*;
 import org.jetbrains.jet.lang.types.*;
 
@@ -208,4 +209,15 @@ public class BindingTraceContext implements BindingContext, BindingTrace {
         }
         return backingFieldRequired.contains(propertyDescriptor);
     }
+
+    public ConstructorDescriptor resolveSuperConstructor(JetDelegatorToSuperCall superCall, ClassCodegen classCodegen) {
+        JetTypeReference typeReference = superCall.getTypeReference();
+        if (typeReference == null) return null;
+
+        JetTypeElement typeElement = typeReference.getTypeElement();
+        if (!(typeElement instanceof JetUserType)) return null;
+
+        DeclarationDescriptor descriptor = resolveReferenceExpression(((JetUserType) typeElement).getReferenceExpression());
+        return descriptor instanceof ConstructorDescriptor ? (ConstructorDescriptor) descriptor : null;
+    }
 }
diff --git a/idea/src/org/jetbrains/jet/lang/types/FunctionDescriptorUtil.java b/idea/src/org/jetbrains/jet/lang/types/FunctionDescriptorUtil.java
index c93e3b0382d..ea98c11c019 100644
--- a/idea/src/org/jetbrains/jet/lang/types/FunctionDescriptorUtil.java
+++ b/idea/src/org/jetbrains/jet/lang/types/FunctionDescriptorUtil.java
@@ -96,11 +96,21 @@ public class FunctionDescriptorUtil {
         if (substitutor.isEmpty()) {
             return functionDescriptor;
         }
-        FunctionDescriptorImpl substitutedDescriptor = new FunctionDescriptorImpl(
-                functionDescriptor,
-                // TODO : safeSubstitute
-                functionDescriptor.getAttributes(),
-                functionDescriptor.getName());
+        FunctionDescriptorImpl substitutedDescriptor;
+        if (functionDescriptor instanceof ConstructorDescriptor) {
+            ConstructorDescriptor original = (ConstructorDescriptor) functionDescriptor;
+
+            substitutedDescriptor = new ConstructorDescriptorImpl(
+                   original, functionDescriptor.getAttributes(), original.isPrimary()
+            );
+        }
+        else {
+            substitutedDescriptor = new FunctionDescriptorImpl(
+                    functionDescriptor,
+                    // TODO : safeSubstitute
+                    functionDescriptor.getAttributes(),
+                    functionDescriptor.getName());
+        }
 
         List<ValueParameterDescriptor> substitutedValueParameters = getSubstitutedValueParameters(substitutedDescriptor, functionDescriptor, substitutor);
         if (substitutedValueParameters == null) {
diff --git a/idea/testData/codegen/fieldSetterPlusEq.jet b/idea/testData/codegen/fieldSetterPlusEq.jet
new file mode 100644
index 00000000000..407adaf7f5e
--- /dev/null
+++ b/idea/testData/codegen/fieldSetterPlusEq.jet
@@ -0,0 +1,7 @@
+var collector: String = ""
+  set(it) { $collector += it }
+
+fun append(s: String): String {
+  collector = s;
+  return collector;
+}
diff --git a/idea/testData/codegen/for.jet b/idea/testData/codegen/for.jet
index b0347997ed1..130f41b0608 100644
--- a/idea/testData/codegen/for.jet
+++ b/idea/testData/codegen/for.jet
@@ -1,9 +1,9 @@
 import java.util.*
 
-fun concat(l: List): String {
+fun concat(l: List<String>): String? {
   val sb = new StringBuilder()
   for(s in l) {
     sb.append(s)
   }
-  s.toString()
+  sb.toString()
 }
diff --git a/idea/testData/codegen/inheritance.jet b/idea/testData/codegen/inheritance.jet
new file mode 100644
index 00000000000..2fc3caace24
--- /dev/null
+++ b/idea/testData/codegen/inheritance.jet
@@ -0,0 +1,35 @@
+class X(val x : Int) {}
+class Y(val y : Int) {}
+
+class Point(x : Int, y : Int) : X(x) , Y(y) {}
+
+class Abstract {}
+
+class P1(x : Int, yy : Y) : Abstract, X(x), Y by yy {}
+class P2(x : Int, yy : Y) : X(x), Abstract, Y by yy {}
+class P3(x : Int, yy : Y) : X(x), Y by yy, Abstract {}
+class P4(x : Int, yy : Y) : Y by yy, Abstract, X(x) {}
+
+fun box() : String {
+    if (new X(239).x != 239) return "FAIL #1"
+    if (new Y(239).y != 239) return "FAIL #2"
+
+    val p = new Point(240, -1)
+    if (p.x + p.y != 239) return "FAIL #3"
+
+    val y = new Y(-1)
+/*
+
+    val p1 = new P1(240, y)
+    if (p1.x + p1.y != 239) return "FAIL #4"
+    val p2 = new P2(240, y)
+    if (p2.x + p2.y != 239) return "FAIL #5"
+
+    val p3 = new P3(240, y)
+    if (p3.x + p3.y != 239) return "FAIL #6"
+
+    val p4 = new P4(240, y)
+    if (p4.x + p4.y != 239) return "FAIL #7"
+*/
+    "OK"
+}
\ No newline at end of file
diff --git a/idea/testData/codegen/newInstanceDefaultConstructor.jet b/idea/testData/codegen/newInstanceDefaultConstructor.jet
new file mode 100644
index 00000000000..84ef4b312e2
--- /dev/null
+++ b/idea/testData/codegen/newInstanceDefaultConstructor.jet
@@ -0,0 +1,8 @@
+class SimpleClass() {
+    fun foo() = 610
+}
+
+fun test() {
+  val c = new SimpleClass()
+  return c.foo()
+}
diff --git a/idea/testData/codegen/newInstanceExplicitConstructor.jet b/idea/testData/codegen/newInstanceExplicitConstructor.jet
new file mode 100644
index 00000000000..f16447addad
--- /dev/null
+++ b/idea/testData/codegen/newInstanceExplicitConstructor.jet
@@ -0,0 +1,10 @@
+class SimpleClass {
+    this() {}
+
+    fun foo() = 610
+}
+
+fun test() {
+  val c = new SimpleClass()
+  return c.foo()
+}
diff --git a/idea/testData/codegen/tryCatch.jet b/idea/testData/codegen/tryCatch.jet
new file mode 100644
index 00000000000..0314589c143
--- /dev/null
+++ b/idea/testData/codegen/tryCatch.jet
@@ -0,0 +1,9 @@
+fun foo(s: String): String? {
+  try {
+    Integer.parseInt(s);
+    return "no message";
+  }
+  catch(e: NumberFormatException) {
+    return e.getMessage();
+  }
+}
diff --git a/idea/tests/org/jetbrains/jet/codegen/ClassGenTest.java b/idea/tests/org/jetbrains/jet/codegen/ClassGenTest.java
index 7cebefb5923..7a07d129fa2 100644
--- a/idea/tests/org/jetbrains/jet/codegen/ClassGenTest.java
+++ b/idea/tests/org/jetbrains/jet/codegen/ClassGenTest.java
@@ -24,10 +24,28 @@ public class ClassGenTest extends CodegenTestCase {
         checkInterface(aClass, List.class);
     }
 
-    private void checkInterface(Class aClass, Class ifs) {
+    public void testArrayInheritance() throws Exception {
+        loadFile("inheritance.jet");
+        System.out.println(generateToText());
+
+        assertEquals("OK", blackBox());
+    }
+
+    private static void checkInterface(Class aClass, Class ifs) {
         for (Class anInterface : aClass.getInterfaces()) {
             if (anInterface == ifs) return;
         }
         fail(aClass.getName() + " must have " + ifs.getName() + " in its interfaces");
     }
+
+    public void testNewInstanceExplicitConstructor() throws Exception {
+        loadFile("newInstanceDefaultConstructor.jet");
+        System.out.println(generateToText());
+        final Codegens codegens = generateClassesInFile();
+        loadImplementationClass(codegens, "SimpleClass");
+        Class ns = loadRootNamespaceClass(codegens);
+        final Method method = findMethodByName(ns, "test");
+        final Integer returnValue = (Integer) method.invoke(null);
+        assertEquals(610, returnValue.intValue());
+    }
 }
diff --git a/idea/tests/org/jetbrains/jet/codegen/CodegenTestCase.java b/idea/tests/org/jetbrains/jet/codegen/CodegenTestCase.java
index ede78f23acd..a22e6e95449 100644
--- a/idea/tests/org/jetbrains/jet/codegen/CodegenTestCase.java
+++ b/idea/tests/org/jetbrains/jet/codegen/CodegenTestCase.java
@@ -40,6 +40,18 @@ public abstract class CodegenTestCase extends LightCodeInsightFixtureTestCase {
         myFixture.configureByFile(JetParsingTest.getTestDataDir() + "/codegen/" + name);
     }
 
+    protected String blackBox() throws Exception {
+        Codegens codegens = generateClassesInFile();
+        CodegensClassLoader loader = new CodegensClassLoader(codegens);
+
+        JetFile jetFile = (JetFile) myFixture.getFile();
+        final JetNamespace namespace = jetFile.getRootNamespace();
+        String fqName = NamespaceCodegen.getJVMClassName(namespace.getFQName()).replace("/", ".");
+        Class<?> namespaceClass = loader.loadClass(fqName);
+        Method method = namespaceClass.getMethod("box");
+        return (String) method.invoke(null);
+    }
+
     protected String generateToText() {
         Codegens state = new Codegens(getProject(), true);
         JetFile jetFile = (JetFile) myFixture.getFile();
@@ -60,10 +72,14 @@ public abstract class CodegenTestCase extends LightCodeInsightFixtureTestCase {
     }
 
     protected Class generateNamespaceClass() {
+        Codegens state = generateClassesInFile();
+        return loadRootNamespaceClass(state);
+    }
+
+    protected Class loadRootNamespaceClass(Codegens state) {
         JetFile jetFile = (JetFile) myFixture.getFile();
         final JetNamespace namespace = jetFile.getRootNamespace();
         String fqName = NamespaceCodegen.getJVMClassName(namespace.getFQName()).replace("/", ".");
-        Codegens state = generateClassesInFile();
         return loadClass(fqName, state);
     }
 
@@ -140,6 +156,25 @@ public abstract class CodegenTestCase extends LightCodeInsightFixtureTestCase {
       }
     }
 
+    private static class CodegensClassLoader extends ClassLoader {
+        private final Codegens state;
+
+        public CodegensClassLoader(Codegens state) {
+            super(CodegenTestCase.class.getClassLoader());
+            this.state = state;
+        }
+
+        @Override
+        protected Class<?> findClass(String name) throws ClassNotFoundException {
+            String file = name.replace('.', '/') + ".class";
+            if (state.files().contains(file)) {
+                byte[] bytes = state.asBytes(file);
+                return defineClass(name, bytes, 0, bytes.length);
+            }
+            return super.findClass(name);
+        }
+    }
+
     @NotNull
     @Override
     protected LightProjectDescriptor getProjectDescriptor() {
diff --git a/idea/tests/org/jetbrains/jet/codegen/ControlStructuresTest.java b/idea/tests/org/jetbrains/jet/codegen/ControlStructuresTest.java
index ad0812214a2..c4f2fdd30c1 100644
--- a/idea/tests/org/jetbrains/jet/codegen/ControlStructuresTest.java
+++ b/idea/tests/org/jetbrains/jet/codegen/ControlStructuresTest.java
@@ -71,11 +71,12 @@ public class ControlStructuresTest extends CodegenTestCase {
         assertEquals(10, main.invoke(null, "false"));
     }
 
-    public void _testFor() throws Exception {
+    public void testFor() throws Exception {
         loadFile("for.jet");
+        System.out.println(generateToText());
         final Method main = generateFunction();
         List<String> args = Arrays.asList("IntelliJ", " ", "IDEA");
-        assertEquals("IntelliJ IDEA", main.invoke(args));
+        assertEquals("IntelliJ IDEA", main.invoke(null, args));
     }
 
     public void testForInArray() throws Exception {
@@ -99,4 +100,11 @@ public class ControlStructuresTest extends CodegenTestCase {
         }
         assertTrue(caught);
     }
+
+    public void testTryCatch() throws Exception {
+        loadFile("tryCatch.jet");
+        final Method main = generateFunction();
+        assertEquals("no message", main.invoke(null, "0"));
+        assertEquals("xxx", main.invoke(null, "a"));
+    }
 }
diff --git a/idea/tests/org/jetbrains/jet/codegen/NamespaceGenTest.java b/idea/tests/org/jetbrains/jet/codegen/NamespaceGenTest.java
index abba7b42a1d..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.*;
@@ -259,6 +260,13 @@ public class NamespaceGenTest extends CodegenTestCase {
         assertEquals("jet Lang", main.invoke(null, "jet", " ", "Lang"));
     }
 
+    public void testStringPlusEq() throws Exception {
+        loadText("fun foo(s: String) { val result = s; result += s; return result; } ");
+        System.out.println(generateToText());
+        final Method main = generateFunction();
+        assertEquals("JarJar", main.invoke(null, "Jar"));
+    }
+
     public void testStringCompare() throws Exception {
         loadText("fun foo(s1: String, s2: String) = s1 < s2");
         System.out.println(generateToText());
@@ -351,4 +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/idea/tests/org/jetbrains/jet/codegen/PropertyGenTest.java b/idea/tests/org/jetbrains/jet/codegen/PropertyGenTest.java
index 34047039861..11377e758b2 100644
--- a/idea/tests/org/jetbrains/jet/codegen/PropertyGenTest.java
+++ b/idea/tests/org/jetbrains/jet/codegen/PropertyGenTest.java
@@ -81,6 +81,15 @@ public class PropertyGenTest extends CodegenTestCase {
         assertEquals(value, "IntelliJ IDEA");
     }
 
+    public void testFieldSetterPlusEq() throws Exception {
+        loadFile("fieldSetterPlusEq.jet");
+        System.out.println(generateToText());
+        final Method method = generateFunction("append");
+        method.invoke(null, "IntelliJ ");
+        String value = (String) method.invoke(null, "IDEA");
+        assertEquals(value, "IntelliJ IDEA");
+    }
+
     public void testAccessorsWithoutBody() throws Exception {
         loadText("class AccessorsWithoutBody() { public var foo: Int = 349\n  get\n  private set\n fun setter() { foo = 610; } } ");
         final Class aClass = loadImplementationClass(generateClassesInFile(), "AccessorsWithoutBody");
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/src/jet/Tuple1.java b/stdlib/src/jet/Tuple1.java
new file mode 100644
index 00000000000..fd9214be8d3
--- /dev/null
+++ b/stdlib/src/jet/Tuple1.java
@@ -0,0 +1,28 @@
+package jet;
+
+public class Tuple1<T1> {
+    public final T1 _1;
+
+    public Tuple1(T1 t1) {
+        _1 = t1;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple1 t = (Tuple1) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple10.java b/stdlib/src/jet/Tuple10.java
new file mode 100644
index 00000000000..c8d6a0077a3
--- /dev/null
+++ b/stdlib/src/jet/Tuple10.java
@@ -0,0 +1,64 @@
+package jet;
+
+public class Tuple10<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+
+    public Tuple10(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple10 t = (Tuple10) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple11.java b/stdlib/src/jet/Tuple11.java
new file mode 100644
index 00000000000..a662f9c7b31
--- /dev/null
+++ b/stdlib/src/jet/Tuple11.java
@@ -0,0 +1,68 @@
+package jet;
+
+public class Tuple11<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+
+    public Tuple11(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple11 t = (Tuple11) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple12.java b/stdlib/src/jet/Tuple12.java
new file mode 100644
index 00000000000..2c003f48433
--- /dev/null
+++ b/stdlib/src/jet/Tuple12.java
@@ -0,0 +1,72 @@
+package jet;
+
+public class Tuple12<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+    public final T12 _12;
+
+    public Tuple12(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11, T12 t12) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+        _12 = t12;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ", " + _12 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple12 t = (Tuple12) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        if (_12 != null ? !_12.equals(t._12) : t._12 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        result = 31 * result + (_12 != null ? _12.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple13.java b/stdlib/src/jet/Tuple13.java
new file mode 100644
index 00000000000..bb2d40775d4
--- /dev/null
+++ b/stdlib/src/jet/Tuple13.java
@@ -0,0 +1,76 @@
+package jet;
+
+public class Tuple13<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+    public final T12 _12;
+    public final T13 _13;
+
+    public Tuple13(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11, T12 t12, T13 t13) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+        _12 = t12;
+        _13 = t13;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ", " + _12 + ", " + _13 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple13 t = (Tuple13) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        if (_12 != null ? !_12.equals(t._12) : t._12 != null) return false;
+        if (_13 != null ? !_13.equals(t._13) : t._13 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        result = 31 * result + (_12 != null ? _12.hashCode() : 0);
+        result = 31 * result + (_13 != null ? _13.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple14.java b/stdlib/src/jet/Tuple14.java
new file mode 100644
index 00000000000..11d3bb1f700
--- /dev/null
+++ b/stdlib/src/jet/Tuple14.java
@@ -0,0 +1,80 @@
+package jet;
+
+public class Tuple14<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+    public final T12 _12;
+    public final T13 _13;
+    public final T14 _14;
+
+    public Tuple14(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11, T12 t12, T13 t13, T14 t14) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+        _12 = t12;
+        _13 = t13;
+        _14 = t14;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ", " + _12 + ", " + _13 + ", " + _14 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple14 t = (Tuple14) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        if (_12 != null ? !_12.equals(t._12) : t._12 != null) return false;
+        if (_13 != null ? !_13.equals(t._13) : t._13 != null) return false;
+        if (_14 != null ? !_14.equals(t._14) : t._14 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        result = 31 * result + (_12 != null ? _12.hashCode() : 0);
+        result = 31 * result + (_13 != null ? _13.hashCode() : 0);
+        result = 31 * result + (_14 != null ? _14.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple15.java b/stdlib/src/jet/Tuple15.java
new file mode 100644
index 00000000000..09a84d71c45
--- /dev/null
+++ b/stdlib/src/jet/Tuple15.java
@@ -0,0 +1,84 @@
+package jet;
+
+public class Tuple15<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+    public final T12 _12;
+    public final T13 _13;
+    public final T14 _14;
+    public final T15 _15;
+
+    public Tuple15(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11, T12 t12, T13 t13, T14 t14, T15 t15) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+        _12 = t12;
+        _13 = t13;
+        _14 = t14;
+        _15 = t15;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ", " + _12 + ", " + _13 + ", " + _14 + ", " + _15 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple15 t = (Tuple15) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        if (_12 != null ? !_12.equals(t._12) : t._12 != null) return false;
+        if (_13 != null ? !_13.equals(t._13) : t._13 != null) return false;
+        if (_14 != null ? !_14.equals(t._14) : t._14 != null) return false;
+        if (_15 != null ? !_15.equals(t._15) : t._15 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        result = 31 * result + (_12 != null ? _12.hashCode() : 0);
+        result = 31 * result + (_13 != null ? _13.hashCode() : 0);
+        result = 31 * result + (_14 != null ? _14.hashCode() : 0);
+        result = 31 * result + (_15 != null ? _15.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple16.java b/stdlib/src/jet/Tuple16.java
new file mode 100644
index 00000000000..a278b9a0b2b
--- /dev/null
+++ b/stdlib/src/jet/Tuple16.java
@@ -0,0 +1,88 @@
+package jet;
+
+public class Tuple16<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+    public final T12 _12;
+    public final T13 _13;
+    public final T14 _14;
+    public final T15 _15;
+    public final T16 _16;
+
+    public Tuple16(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11, T12 t12, T13 t13, T14 t14, T15 t15, T16 t16) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+        _12 = t12;
+        _13 = t13;
+        _14 = t14;
+        _15 = t15;
+        _16 = t16;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ", " + _12 + ", " + _13 + ", " + _14 + ", " + _15 + ", " + _16 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple16 t = (Tuple16) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        if (_12 != null ? !_12.equals(t._12) : t._12 != null) return false;
+        if (_13 != null ? !_13.equals(t._13) : t._13 != null) return false;
+        if (_14 != null ? !_14.equals(t._14) : t._14 != null) return false;
+        if (_15 != null ? !_15.equals(t._15) : t._15 != null) return false;
+        if (_16 != null ? !_16.equals(t._16) : t._16 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        result = 31 * result + (_12 != null ? _12.hashCode() : 0);
+        result = 31 * result + (_13 != null ? _13.hashCode() : 0);
+        result = 31 * result + (_14 != null ? _14.hashCode() : 0);
+        result = 31 * result + (_15 != null ? _15.hashCode() : 0);
+        result = 31 * result + (_16 != null ? _16.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple17.java b/stdlib/src/jet/Tuple17.java
new file mode 100644
index 00000000000..58350c888a1
--- /dev/null
+++ b/stdlib/src/jet/Tuple17.java
@@ -0,0 +1,92 @@
+package jet;
+
+public class Tuple17<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+    public final T12 _12;
+    public final T13 _13;
+    public final T14 _14;
+    public final T15 _15;
+    public final T16 _16;
+    public final T17 _17;
+
+    public Tuple17(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11, T12 t12, T13 t13, T14 t14, T15 t15, T16 t16, T17 t17) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+        _12 = t12;
+        _13 = t13;
+        _14 = t14;
+        _15 = t15;
+        _16 = t16;
+        _17 = t17;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ", " + _12 + ", " + _13 + ", " + _14 + ", " + _15 + ", " + _16 + ", " + _17 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple17 t = (Tuple17) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        if (_12 != null ? !_12.equals(t._12) : t._12 != null) return false;
+        if (_13 != null ? !_13.equals(t._13) : t._13 != null) return false;
+        if (_14 != null ? !_14.equals(t._14) : t._14 != null) return false;
+        if (_15 != null ? !_15.equals(t._15) : t._15 != null) return false;
+        if (_16 != null ? !_16.equals(t._16) : t._16 != null) return false;
+        if (_17 != null ? !_17.equals(t._17) : t._17 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        result = 31 * result + (_12 != null ? _12.hashCode() : 0);
+        result = 31 * result + (_13 != null ? _13.hashCode() : 0);
+        result = 31 * result + (_14 != null ? _14.hashCode() : 0);
+        result = 31 * result + (_15 != null ? _15.hashCode() : 0);
+        result = 31 * result + (_16 != null ? _16.hashCode() : 0);
+        result = 31 * result + (_17 != null ? _17.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple18.java b/stdlib/src/jet/Tuple18.java
new file mode 100644
index 00000000000..fbc69360ad4
--- /dev/null
+++ b/stdlib/src/jet/Tuple18.java
@@ -0,0 +1,96 @@
+package jet;
+
+public class Tuple18<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+    public final T12 _12;
+    public final T13 _13;
+    public final T14 _14;
+    public final T15 _15;
+    public final T16 _16;
+    public final T17 _17;
+    public final T18 _18;
+
+    public Tuple18(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11, T12 t12, T13 t13, T14 t14, T15 t15, T16 t16, T17 t17, T18 t18) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+        _12 = t12;
+        _13 = t13;
+        _14 = t14;
+        _15 = t15;
+        _16 = t16;
+        _17 = t17;
+        _18 = t18;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ", " + _12 + ", " + _13 + ", " + _14 + ", " + _15 + ", " + _16 + ", " + _17 + ", " + _18 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple18 t = (Tuple18) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        if (_12 != null ? !_12.equals(t._12) : t._12 != null) return false;
+        if (_13 != null ? !_13.equals(t._13) : t._13 != null) return false;
+        if (_14 != null ? !_14.equals(t._14) : t._14 != null) return false;
+        if (_15 != null ? !_15.equals(t._15) : t._15 != null) return false;
+        if (_16 != null ? !_16.equals(t._16) : t._16 != null) return false;
+        if (_17 != null ? !_17.equals(t._17) : t._17 != null) return false;
+        if (_18 != null ? !_18.equals(t._18) : t._18 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        result = 31 * result + (_12 != null ? _12.hashCode() : 0);
+        result = 31 * result + (_13 != null ? _13.hashCode() : 0);
+        result = 31 * result + (_14 != null ? _14.hashCode() : 0);
+        result = 31 * result + (_15 != null ? _15.hashCode() : 0);
+        result = 31 * result + (_16 != null ? _16.hashCode() : 0);
+        result = 31 * result + (_17 != null ? _17.hashCode() : 0);
+        result = 31 * result + (_18 != null ? _18.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple19.java b/stdlib/src/jet/Tuple19.java
new file mode 100644
index 00000000000..3203887ef22
--- /dev/null
+++ b/stdlib/src/jet/Tuple19.java
@@ -0,0 +1,100 @@
+package jet;
+
+public class Tuple19<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+    public final T12 _12;
+    public final T13 _13;
+    public final T14 _14;
+    public final T15 _15;
+    public final T16 _16;
+    public final T17 _17;
+    public final T18 _18;
+    public final T19 _19;
+
+    public Tuple19(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11, T12 t12, T13 t13, T14 t14, T15 t15, T16 t16, T17 t17, T18 t18, T19 t19) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+        _12 = t12;
+        _13 = t13;
+        _14 = t14;
+        _15 = t15;
+        _16 = t16;
+        _17 = t17;
+        _18 = t18;
+        _19 = t19;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ", " + _12 + ", " + _13 + ", " + _14 + ", " + _15 + ", " + _16 + ", " + _17 + ", " + _18 + ", " + _19 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple19 t = (Tuple19) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        if (_12 != null ? !_12.equals(t._12) : t._12 != null) return false;
+        if (_13 != null ? !_13.equals(t._13) : t._13 != null) return false;
+        if (_14 != null ? !_14.equals(t._14) : t._14 != null) return false;
+        if (_15 != null ? !_15.equals(t._15) : t._15 != null) return false;
+        if (_16 != null ? !_16.equals(t._16) : t._16 != null) return false;
+        if (_17 != null ? !_17.equals(t._17) : t._17 != null) return false;
+        if (_18 != null ? !_18.equals(t._18) : t._18 != null) return false;
+        if (_19 != null ? !_19.equals(t._19) : t._19 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        result = 31 * result + (_12 != null ? _12.hashCode() : 0);
+        result = 31 * result + (_13 != null ? _13.hashCode() : 0);
+        result = 31 * result + (_14 != null ? _14.hashCode() : 0);
+        result = 31 * result + (_15 != null ? _15.hashCode() : 0);
+        result = 31 * result + (_16 != null ? _16.hashCode() : 0);
+        result = 31 * result + (_17 != null ? _17.hashCode() : 0);
+        result = 31 * result + (_18 != null ? _18.hashCode() : 0);
+        result = 31 * result + (_19 != null ? _19.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple2.java b/stdlib/src/jet/Tuple2.java
new file mode 100644
index 00000000000..2150d8b71bb
--- /dev/null
+++ b/stdlib/src/jet/Tuple2.java
@@ -0,0 +1,32 @@
+package jet;
+
+public class Tuple2<T1, T2> {
+    public final T1 _1;
+    public final T2 _2;
+
+    public Tuple2(T1 t1, T2 t2) {
+        _1 = t1;
+        _2 = t2;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple2 t = (Tuple2) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple20.java b/stdlib/src/jet/Tuple20.java
new file mode 100644
index 00000000000..a7afabf2e5a
--- /dev/null
+++ b/stdlib/src/jet/Tuple20.java
@@ -0,0 +1,104 @@
+package jet;
+
+public class Tuple20<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+    public final T12 _12;
+    public final T13 _13;
+    public final T14 _14;
+    public final T15 _15;
+    public final T16 _16;
+    public final T17 _17;
+    public final T18 _18;
+    public final T19 _19;
+    public final T20 _20;
+
+    public Tuple20(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11, T12 t12, T13 t13, T14 t14, T15 t15, T16 t16, T17 t17, T18 t18, T19 t19, T20 t20) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+        _12 = t12;
+        _13 = t13;
+        _14 = t14;
+        _15 = t15;
+        _16 = t16;
+        _17 = t17;
+        _18 = t18;
+        _19 = t19;
+        _20 = t20;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ", " + _12 + ", " + _13 + ", " + _14 + ", " + _15 + ", " + _16 + ", " + _17 + ", " + _18 + ", " + _19 + ", " + _20 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple20 t = (Tuple20) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        if (_12 != null ? !_12.equals(t._12) : t._12 != null) return false;
+        if (_13 != null ? !_13.equals(t._13) : t._13 != null) return false;
+        if (_14 != null ? !_14.equals(t._14) : t._14 != null) return false;
+        if (_15 != null ? !_15.equals(t._15) : t._15 != null) return false;
+        if (_16 != null ? !_16.equals(t._16) : t._16 != null) return false;
+        if (_17 != null ? !_17.equals(t._17) : t._17 != null) return false;
+        if (_18 != null ? !_18.equals(t._18) : t._18 != null) return false;
+        if (_19 != null ? !_19.equals(t._19) : t._19 != null) return false;
+        if (_20 != null ? !_20.equals(t._20) : t._20 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        result = 31 * result + (_12 != null ? _12.hashCode() : 0);
+        result = 31 * result + (_13 != null ? _13.hashCode() : 0);
+        result = 31 * result + (_14 != null ? _14.hashCode() : 0);
+        result = 31 * result + (_15 != null ? _15.hashCode() : 0);
+        result = 31 * result + (_16 != null ? _16.hashCode() : 0);
+        result = 31 * result + (_17 != null ? _17.hashCode() : 0);
+        result = 31 * result + (_18 != null ? _18.hashCode() : 0);
+        result = 31 * result + (_19 != null ? _19.hashCode() : 0);
+        result = 31 * result + (_20 != null ? _20.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple21.java b/stdlib/src/jet/Tuple21.java
new file mode 100644
index 00000000000..611434f8737
--- /dev/null
+++ b/stdlib/src/jet/Tuple21.java
@@ -0,0 +1,108 @@
+package jet;
+
+public class Tuple21<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+    public final T12 _12;
+    public final T13 _13;
+    public final T14 _14;
+    public final T15 _15;
+    public final T16 _16;
+    public final T17 _17;
+    public final T18 _18;
+    public final T19 _19;
+    public final T20 _20;
+    public final T21 _21;
+
+    public Tuple21(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11, T12 t12, T13 t13, T14 t14, T15 t15, T16 t16, T17 t17, T18 t18, T19 t19, T20 t20, T21 t21) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+        _12 = t12;
+        _13 = t13;
+        _14 = t14;
+        _15 = t15;
+        _16 = t16;
+        _17 = t17;
+        _18 = t18;
+        _19 = t19;
+        _20 = t20;
+        _21 = t21;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ", " + _12 + ", " + _13 + ", " + _14 + ", " + _15 + ", " + _16 + ", " + _17 + ", " + _18 + ", " + _19 + ", " + _20 + ", " + _21 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple21 t = (Tuple21) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        if (_12 != null ? !_12.equals(t._12) : t._12 != null) return false;
+        if (_13 != null ? !_13.equals(t._13) : t._13 != null) return false;
+        if (_14 != null ? !_14.equals(t._14) : t._14 != null) return false;
+        if (_15 != null ? !_15.equals(t._15) : t._15 != null) return false;
+        if (_16 != null ? !_16.equals(t._16) : t._16 != null) return false;
+        if (_17 != null ? !_17.equals(t._17) : t._17 != null) return false;
+        if (_18 != null ? !_18.equals(t._18) : t._18 != null) return false;
+        if (_19 != null ? !_19.equals(t._19) : t._19 != null) return false;
+        if (_20 != null ? !_20.equals(t._20) : t._20 != null) return false;
+        if (_21 != null ? !_21.equals(t._21) : t._21 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        result = 31 * result + (_12 != null ? _12.hashCode() : 0);
+        result = 31 * result + (_13 != null ? _13.hashCode() : 0);
+        result = 31 * result + (_14 != null ? _14.hashCode() : 0);
+        result = 31 * result + (_15 != null ? _15.hashCode() : 0);
+        result = 31 * result + (_16 != null ? _16.hashCode() : 0);
+        result = 31 * result + (_17 != null ? _17.hashCode() : 0);
+        result = 31 * result + (_18 != null ? _18.hashCode() : 0);
+        result = 31 * result + (_19 != null ? _19.hashCode() : 0);
+        result = 31 * result + (_20 != null ? _20.hashCode() : 0);
+        result = 31 * result + (_21 != null ? _21.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple22.java b/stdlib/src/jet/Tuple22.java
new file mode 100644
index 00000000000..72c53768c4f
--- /dev/null
+++ b/stdlib/src/jet/Tuple22.java
@@ -0,0 +1,112 @@
+package jet;
+
+public class Tuple22<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+    public final T10 _10;
+    public final T11 _11;
+    public final T12 _12;
+    public final T13 _13;
+    public final T14 _14;
+    public final T15 _15;
+    public final T16 _16;
+    public final T17 _17;
+    public final T18 _18;
+    public final T19 _19;
+    public final T20 _20;
+    public final T21 _21;
+    public final T22 _22;
+
+    public Tuple22(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10, T11 t11, T12 t12, T13 t13, T14 t14, T15 t15, T16 t16, T17 t17, T18 t18, T19 t19, T20 t20, T21 t21, T22 t22) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+        _10 = t10;
+        _11 = t11;
+        _12 = t12;
+        _13 = t13;
+        _14 = t14;
+        _15 = t15;
+        _16 = t16;
+        _17 = t17;
+        _18 = t18;
+        _19 = t19;
+        _20 = t20;
+        _21 = t21;
+        _22 = t22;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ", " + _10 + ", " + _11 + ", " + _12 + ", " + _13 + ", " + _14 + ", " + _15 + ", " + _16 + ", " + _17 + ", " + _18 + ", " + _19 + ", " + _20 + ", " + _21 + ", " + _22 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple22 t = (Tuple22) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        if (_10 != null ? !_10.equals(t._10) : t._10 != null) return false;
+        if (_11 != null ? !_11.equals(t._11) : t._11 != null) return false;
+        if (_12 != null ? !_12.equals(t._12) : t._12 != null) return false;
+        if (_13 != null ? !_13.equals(t._13) : t._13 != null) return false;
+        if (_14 != null ? !_14.equals(t._14) : t._14 != null) return false;
+        if (_15 != null ? !_15.equals(t._15) : t._15 != null) return false;
+        if (_16 != null ? !_16.equals(t._16) : t._16 != null) return false;
+        if (_17 != null ? !_17.equals(t._17) : t._17 != null) return false;
+        if (_18 != null ? !_18.equals(t._18) : t._18 != null) return false;
+        if (_19 != null ? !_19.equals(t._19) : t._19 != null) return false;
+        if (_20 != null ? !_20.equals(t._20) : t._20 != null) return false;
+        if (_21 != null ? !_21.equals(t._21) : t._21 != null) return false;
+        if (_22 != null ? !_22.equals(t._22) : t._22 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        result = 31 * result + (_10 != null ? _10.hashCode() : 0);
+        result = 31 * result + (_11 != null ? _11.hashCode() : 0);
+        result = 31 * result + (_12 != null ? _12.hashCode() : 0);
+        result = 31 * result + (_13 != null ? _13.hashCode() : 0);
+        result = 31 * result + (_14 != null ? _14.hashCode() : 0);
+        result = 31 * result + (_15 != null ? _15.hashCode() : 0);
+        result = 31 * result + (_16 != null ? _16.hashCode() : 0);
+        result = 31 * result + (_17 != null ? _17.hashCode() : 0);
+        result = 31 * result + (_18 != null ? _18.hashCode() : 0);
+        result = 31 * result + (_19 != null ? _19.hashCode() : 0);
+        result = 31 * result + (_20 != null ? _20.hashCode() : 0);
+        result = 31 * result + (_21 != null ? _21.hashCode() : 0);
+        result = 31 * result + (_22 != null ? _22.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple3.java b/stdlib/src/jet/Tuple3.java
new file mode 100644
index 00000000000..47b83641ceb
--- /dev/null
+++ b/stdlib/src/jet/Tuple3.java
@@ -0,0 +1,36 @@
+package jet;
+
+public class Tuple3<T1, T2, T3> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+
+    public Tuple3(T1 t1, T2 t2, T3 t3) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple3 t = (Tuple3) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple4.java b/stdlib/src/jet/Tuple4.java
new file mode 100644
index 00000000000..a756455249f
--- /dev/null
+++ b/stdlib/src/jet/Tuple4.java
@@ -0,0 +1,40 @@
+package jet;
+
+public class Tuple4<T1, T2, T3, T4> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+
+    public Tuple4(T1 t1, T2 t2, T3 t3, T4 t4) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple4 t = (Tuple4) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple5.java b/stdlib/src/jet/Tuple5.java
new file mode 100644
index 00000000000..b96edcea1e2
--- /dev/null
+++ b/stdlib/src/jet/Tuple5.java
@@ -0,0 +1,44 @@
+package jet;
+
+public class Tuple5<T1, T2, T3, T4, T5> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+
+    public Tuple5(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple5 t = (Tuple5) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple6.java b/stdlib/src/jet/Tuple6.java
new file mode 100644
index 00000000000..f8b778ac7d6
--- /dev/null
+++ b/stdlib/src/jet/Tuple6.java
@@ -0,0 +1,48 @@
+package jet;
+
+public class Tuple6<T1, T2, T3, T4, T5, T6> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+
+    public Tuple6(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple6 t = (Tuple6) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple7.java b/stdlib/src/jet/Tuple7.java
new file mode 100644
index 00000000000..e5cc9969590
--- /dev/null
+++ b/stdlib/src/jet/Tuple7.java
@@ -0,0 +1,52 @@
+package jet;
+
+public class Tuple7<T1, T2, T3, T4, T5, T6, T7> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+
+    public Tuple7(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple7 t = (Tuple7) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple8.java b/stdlib/src/jet/Tuple8.java
new file mode 100644
index 00000000000..6c066f3b8c0
--- /dev/null
+++ b/stdlib/src/jet/Tuple8.java
@@ -0,0 +1,56 @@
+package jet;
+
+public class Tuple8<T1, T2, T3, T4, T5, T6, T7, T8> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+
+    public Tuple8(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple8 t = (Tuple8) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/stdlib/src/jet/Tuple9.java b/stdlib/src/jet/Tuple9.java
new file mode 100644
index 00000000000..bb83db5317d
--- /dev/null
+++ b/stdlib/src/jet/Tuple9.java
@@ -0,0 +1,60 @@
+package jet;
+
+public class Tuple9<T1, T2, T3, T4, T5, T6, T7, T8, T9> {
+    public final T1 _1;
+    public final T2 _2;
+    public final T3 _3;
+    public final T4 _4;
+    public final T5 _5;
+    public final T6 _6;
+    public final T7 _7;
+    public final T8 _8;
+    public final T9 _9;
+
+    public Tuple9(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9) {
+        _1 = t1;
+        _2 = t2;
+        _3 = t3;
+        _4 = t4;
+        _5 = t5;
+        _6 = t6;
+        _7 = t7;
+        _8 = t8;
+        _9 = t9;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + _1 + ", " + _2 + ", " + _3 + ", " + _4 + ", " + _5 + ", " + _6 + ", " + _7 + ", " + _8 + ", " + _9 + ")";
+    }
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Tuple9 t = (Tuple9) o;
+        if (_1 != null ? !_1.equals(t._1) : t._1 != null) return false;
+        if (_2 != null ? !_2.equals(t._2) : t._2 != null) return false;
+        if (_3 != null ? !_3.equals(t._3) : t._3 != null) return false;
+        if (_4 != null ? !_4.equals(t._4) : t._4 != null) return false;
+        if (_5 != null ? !_5.equals(t._5) : t._5 != null) return false;
+        if (_6 != null ? !_6.equals(t._6) : t._6 != null) return false;
+        if (_7 != null ? !_7.equals(t._7) : t._7 != null) return false;
+        if (_8 != null ? !_8.equals(t._8) : t._8 != null) return false;
+        if (_9 != null ? !_9.equals(t._9) : t._9 != null) return false;
+        return true;
+    }
+    @Override
+    public int hashCode() {
+        int result = _1 != null ? _1.hashCode() : 0;
+        result = 31 * result + (_2 != null ? _2.hashCode() : 0);
+        result = 31 * result + (_3 != null ? _3.hashCode() : 0);
+        result = 31 * result + (_4 != null ? _4.hashCode() : 0);
+        result = 31 * result + (_5 != null ? _5.hashCode() : 0);
+        result = 31 * result + (_6 != null ? _6.hashCode() : 0);
+        result = 31 * result + (_7 != null ? _7.hashCode() : 0);
+        result = 31 * result + (_8 != null ? _8.hashCode() : 0);
+        result = 31 * result + (_9 != null ? _9.hashCode() : 0);
+        return result;
+    }
+}
\ No newline at end of file
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>
+
diff --git a/tupleGen.py b/tupleGen.py
new file mode 100644
index 00000000000..92519c80871
--- /dev/null
+++ b/tupleGen.py
@@ -0,0 +1,41 @@
+def generateTupleClass(i):
+    f = open("stdlib/src/jet/Tuple" + str(i) + ".java", "w")
+    f.write("package jet;\n\n")
+    f.write("public class Tuple" + str(i) + "<")
+    f.write(", ".join(("T" + str(j)) for j in range(1, i+1)))
+    f.write("> {\n")
+    for j in range(1, i+1):
+        f.write("    public final T{0} _{0};\n".format(j))
+
+    f.write("\n    public Tuple" + str(i) + "(")
+    f.write(", ".join("T{0} t{0}".format(j) for j in range(1, i+1)))
+    f.write(") {\n")
+    for j in range(1, i+1):
+        f.write("        _{0} = t{0};\n".format(j))
+    f.write("    }\n\n")
+
+    f.write("    @Override\n    public String toString() {\n")
+    f.write('        return "(" + ' + ' + ", " + '.join("_{0}".format(j) for j in range(1, i+1)) + ' + ")";\n')
+    f.write("    }\n")
+
+    f.write("    @Override\n    public boolean equals(Object o) {\n")
+    f.write("        if (this == o) return true;\n")
+    f.write("        if (o == null || getClass() != o.getClass()) return false;\n\n")
+    f.write("        Tuple{0} t = (Tuple{0}) o;\n".format(i))
+    for j in range(1, i+1):
+        f.write("        if (_{0} != null ? !_{0}.equals(t._{0}) : t._{0} != null) return false;\n".format(j))
+    f.write("        return true;\n")
+    f.write("    }\n")
+
+    f.write("    @Override\n    public int hashCode() {\n")
+    f.write("        int result = _1 != null ? _1.hashCode() : 0;\n")
+    for j in range(2, i+1):
+        f.write("        result = 31 * result + (_{0} != null ? _{0}.hashCode() : 0);\n".format(j))
+    f.write("        return result;\n")
+    f.write("    }\n")
+
+    f.write("}")
+    f.close()
+
+for i in range(1, 23):
+    generateTupleClass(i)