Remove CYLetStatement and provide a stub of CYLet.

[cycript.git] / Replace.cpp

diff --git a/Replace.cpp b/Replace.cpp
index 1a03a5cf8a8f9afe4b7764b3b89b2560c4a9a59d..ac673adefd204c04966a66d0a51f0f93b01cce0e 100644 (file)
--- a/Replace.cpp
+++ b/Replace.cpp
@@ -1,65 +1,64 @@
-/* Cycript - Inlining/Optimizing JavaScript Compiler
- * Copyright (C) 2009  Jay Freeman (saurik)
+/* Cycript - Optimizing JavaScript Compiler/Runtime
+ * Copyright (C) 2009-2015  Jay Freeman (saurik)

 */
 
 */
 

-/* Modified BSD License {{{ */
+/* GNU Affero General Public License, Version 3 {{{ */

 /*
 /*

- *        Redistribution and use in source and binary
- * forms, with or without modification, are permitted
- * provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the
- *    above copyright notice, this list of conditions
- *    and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the
- *    above copyright notice, this list of conditions
- *    and the following disclaimer in the documentation
- *    and/or other materials provided with the
- *    distribution.
- * 3. The name of the author may not be used to endorse
- *    or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+**/

 /* }}} */
 
 /* }}} */
 

-#include "Parser.hpp"
-#include "Context.hpp"
-

 #include <iomanip>
 
 #include "Replace.hpp"
 #include <iomanip>
 
 #include "Replace.hpp"

+#include "Syntax.hpp"
+
+CYFunctionExpression *CYNonLocalize(CYContext &context, CYFunctionExpression *function) {
+    function->nonlocal_ = context.nextlocal_;
+    return function;
+}
+
+CYFunctionExpression *CYSuperize(CYContext &context, CYFunctionExpression *function) {
+    function->super_ = context.super_;
+    return function;
+}
+
+CYStatement *CYDefineProperty(CYExpression *object, CYExpression *name, bool configurable, bool enumerable, CYProperty *descriptor) {
+    return $E($C3($M($V("Object"), $S("defineProperty")), object, name, $ CYObject(CYList<CYProperty>()
+        ->* (configurable ? $ CYPropertyValue($S("configurable"), $ CYTrue()) : NULL)
+        ->* (enumerable ? $ CYPropertyValue($S("enumerable"), $ CYTrue()) : NULL)
+        ->* descriptor)));
+}
+
+static void CYImplicitReturn(CYStatement *&code) {
+    if (CYStatement *&last = CYGetLast(code))
+        last = last->Return();
+}

 
 CYExpression *CYAdd::Replace(CYContext &context) {
     CYInfix::Replace(context);
 
 
 CYExpression *CYAdd::Replace(CYContext &context) {
     CYInfix::Replace(context);
 

-    CYExpression *lhp(lhs_->Primitive(context));
-    CYExpression *rhp(rhs_->Primitive(context));
-
-    CYString *lhs(dynamic_cast<CYString *>(lhp));
-    CYString *rhs(dynamic_cast<CYString *>(rhp));
+    CYString *lhs(dynamic_cast<CYString *>(lhs_));
+    CYString *rhs(dynamic_cast<CYString *>(rhs_));

 
     if (lhs != NULL || rhs != NULL) {
         if (lhs == NULL) {
 
     if (lhs != NULL || rhs != NULL) {
         if (lhs == NULL) {

-            lhs = lhp->String(context);
+            lhs = lhs_->String(context);

             if (lhs == NULL)
                 return this;
         } else if (rhs == NULL) {
             if (lhs == NULL)
                 return this;
         } else if (rhs == NULL) {

-            rhs = rhp->String(context);
+            rhs = rhs_->String(context);

             if (rhs == NULL)
                 return this;
         }
             if (rhs == NULL)
                 return this;
         }


@@ -67,32 +66,41 @@ CYExpression *CYAdd::Replace(CYContext &context) {
         return lhs->Concat(context, rhs);
     }
 
         return lhs->Concat(context, rhs);
     }
 

-    if (CYNumber *lhn = lhp->Number(context))
-        if (CYNumber *rhn = rhp->Number(context))
+    if (CYNumber *lhn = lhs_->Number(context))
+        if (CYNumber *rhn = rhs_->Number(context))

             return $D(lhn->Value() + rhn->Value());
 
     return this;
 }
 
 CYExpression *CYAddressOf::Replace(CYContext &context) {
             return $D(lhn->Value() + rhn->Value());
 
     return this;
 }
 
 CYExpression *CYAddressOf::Replace(CYContext &context) {

-    CYPrefix::Replace(context);

     return $C0($M(rhs_, $S("$cya")));
 }
 
     return $C0($M(rhs_, $S("$cya")));
 }
 

-void CYArgument::Replace(CYContext &context) { $T()
+CYArgument *CYArgument::Replace(CYContext &context) { $T(NULL)

     context.Replace(value_);
     context.Replace(value_);

-    next_->Replace(context);
+    next_ = next_->Replace(context);
+
+    if (value_ == NULL) {
+        if (next_ == NULL)
+            return NULL;
+        else
+            value_ = $U;
+    }
+
+    return this;

 }
 
 CYExpression *CYArray::Replace(CYContext &context) {
 }
 
 CYExpression *CYArray::Replace(CYContext &context) {

-    elements_->Replace(context);
+    if (elements_ != NULL)
+        elements_->Replace(context);

     return this;
 }
 
 CYExpression *CYArrayComprehension::Replace(CYContext &context) {
     CYVariable *cyv($V("$cyv"));
 
     return this;
 }
 
 CYExpression *CYArrayComprehension::Replace(CYContext &context) {
     CYVariable *cyv($V("$cyv"));
 

-    return $C0($F(NULL, $P1("$cyv", comprehensions_->Parameters(context)), $$->*
+    return $C0($F(NULL, $P1($L($I("$cyv")), comprehensions_->Parameters(context)), $$->*

         $E($ CYAssign(cyv, $ CYArray()))->*
         comprehensions_->Replace(context, $E($C1($M(cyv, $S("push")), expression_)))->*
         $ CYReturn(cyv)
         $E($ CYAssign(cyv, $ CYArray()))->*
         comprehensions_->Replace(context, $E($C1($M(cyv, $S("push")), expression_)))->*
         $ CYReturn(cyv)


@@ -105,9 +113,14 @@ CYExpression *CYAssignment::Replace(CYContext &context) {
     return this;
 }
 
     return this;
 }
 

+CYStatement *CYBlock::Return() {
+    CYImplicitReturn(code_);
+    return this;
+}
+

 CYStatement *CYBlock::Replace(CYContext &context) {
 CYStatement *CYBlock::Replace(CYContext &context) {

-    statements_ = statements_->ReplaceAll(context);
-    if (statements_ == NULL)
+    context.ReplaceAll(code_);
+    if (code_ == NULL)

         return $ CYEmpty();
     return this;
 }
         return $ CYEmpty();
     return this;
 }


@@ -116,6 +129,14 @@ CYStatement *CYBreak::Replace(CYContext &context) {
     return this;
 }
 
     return this;
 }
 

+CYExpression *CYCall::AddArgument(CYContext &context, CYExpression *value) {
+    CYArgument **argument(&arguments_);
+    while (*argument != NULL)
+        argument = &(*argument)->next_;
+    *argument = $ CYArgument(value);
+    return this;
+}
+

 CYExpression *CYCall::Replace(CYContext &context) {
     context.Replace(function_);
     arguments_->Replace(context);
 CYExpression *CYCall::Replace(CYContext &context) {
     context.Replace(function_);
     arguments_->Replace(context);


@@ -126,24 +147,87 @@ namespace cy {
 namespace Syntax {
 
 void Catch::Replace(CYContext &context) { $T()
 namespace Syntax {
 
 void Catch::Replace(CYContext &context) { $T()

-    code_.Replace(context);
+    CYScope scope(true, context);
+
+    context.Replace(name_);
+    context.scope_->Declare(context, name_, CYIdentifierCatch);
+
+    context.ReplaceAll(code_);
+    scope.Close(context, code_);

 }
 
 } }
 
 }
 
 } }
 

+CYExpression *CYClassExpression::Replace(CYContext &context) {
+    CYBuilder builder;
+
+    CYIdentifier *super(context.Unique());
+
+    CYIdentifier *old(context.super_);
+    context.super_ = super;
+
+    CYIdentifier *constructor(context.Unique());
+    CYForEach (member, tail_->static_)
+        member->Replace(context, builder, $V(constructor), true);
+
+    CYIdentifier *prototype(context.Unique());
+    CYForEach (member, tail_->instance_)
+        member->Replace(context, builder, $V(prototype), true);
+
+    if (tail_->constructor_ == NULL)
+        tail_->constructor_ = $ CYFunctionExpression(NULL, NULL, NULL);
+    tail_->constructor_ = CYSuperize(context, tail_->constructor_);
+
+    context.super_ = old;
+
+    return $C1($ CYFunctionExpression(NULL, $P($L(super)), $$
+        ->* $ CYVar($L1($L(constructor, tail_->constructor_)))
+        ->* $ CYVar($L1($L(prototype, $ CYFunctionExpression(NULL, NULL, NULL))))
+        ->* $E($ CYAssign($M($V(prototype), $S("prototype")), $M($V(super), $S("prototype"))))
+        ->* $E($ CYAssign($V(prototype), $N($V(prototype))))
+        ->* CYDefineProperty($V(prototype), $S("constructor"), false, false, $ CYPropertyValue($S("value"), $V(constructor)))
+        ->* $ CYVar(builder.declarations_)
+        ->* builder.statements_
+        ->* CYDefineProperty($V(constructor), $S("prototype"), false, false, $ CYPropertyValue($S("value"), $V(prototype)))
+        ->* $ CYReturn($V(constructor))
+    ), tail_->extends_ ?: $V($I("Object")));
+}
+
+CYStatement *CYClassStatement::Replace(CYContext &context) {
+    return $ CYVar($L1($L(name_, $ CYClassExpression(name_, tail_))));
+}
+

 void CYClause::Replace(CYContext &context) { $T()
     context.Replace(case_);
 void CYClause::Replace(CYContext &context) { $T()
     context.Replace(case_);

-    statements_ = statements_->ReplaceAll(context);
+    context.ReplaceAll(code_);

     next_->Replace(context);
 }
 
     next_->Replace(context);
 }
 

-CYStatement *CYComment::Replace(CYContext &context) {
+CYExpression *CYCompound::Replace(CYContext &context) {
+    context.Replace(expression_);
+    context.Replace(next_);
+
+    if (CYCompound *compound = dynamic_cast<CYCompound *>(expression_)) {
+        expression_ = compound->expression_;
+        compound->expression_ = compound->next_;
+        compound->next_ = next_;
+        next_ = compound;
+    }
+

     return this;
 }
 
     return this;
 }
 

-CYExpression *CYCompound::Replace(CYContext &context) {
-    expressions_ = expressions_->ReplaceAll(context);
-    return expressions_ == NULL ? NULL : this;
+CYFunctionParameter *CYCompound::Parameter() const {
+    CYFunctionParameter *next(next_->Parameter());
+    if (next == NULL)
+        return NULL;
+
+    CYFunctionParameter *parameter(expression_->Parameter());
+    if (parameter == NULL)
+        return NULL;
+
+    parameter->SetNext(next);
+    return parameter;

 }
 
 CYFunctionParameter *CYComprehension::Parameters(CYContext &context) const { $T(NULL)
 }
 
 CYFunctionParameter *CYComprehension::Parameters(CYContext &context) const { $T(NULL)


@@ -159,6 +243,10 @@ CYStatement *CYComprehension::Replace(CYContext &context, CYStatement *statement
     return next_ == NULL ? statement : next_->Replace(context, statement);
 }
 
     return next_ == NULL ? statement : next_->Replace(context, statement);
 }
 

+CYExpression *CYComputed::PropertyName(CYContext &context) {
+    return expression_;
+}
+

 CYExpression *CYCondition::Replace(CYContext &context) {
     context.Replace(test_);
     context.Replace(true_);
 CYExpression *CYCondition::Replace(CYContext &context) {
     context.Replace(test_);
     context.Replace(true_);


@@ -166,106 +254,147 @@ CYExpression *CYCondition::Replace(CYContext &context) {
     return this;
 }
 
     return this;
 }
 

+void CYContext::NonLocal(CYStatement *&statements) {
+    CYContext &context(*this);
+
+    if (nextlocal_ != NULL && nextlocal_->identifier_ != NULL) {
+        CYIdentifier *cye($I("$cye")->Replace(context));
+        CYIdentifier *unique(nextlocal_->identifier_->Replace(context));
+
+        CYStatement *declare(
+            $ CYVar($L1($L(unique, $ CYObject()))));
+
+        cy::Syntax::Catch *rescue(
+            $ cy::Syntax::Catch(cye, $$->*
+                $ CYIf($ CYIdentical($M($V(cye), $S("$cyk")), $V(unique)), $$->*
+                    $ CYReturn($M($V(cye), $S("$cyv"))))->*
+                $ cy::Syntax::Throw($V(cye))));
+
+        // XXX: I don't understand any of this
+        context.Replace(declare);
+        rescue->Replace(context);
+
+        statements = $$->*
+            declare->*
+            $ cy::Syntax::Try(statements, rescue, NULL);
+    }
+}
+
+CYIdentifier *CYContext::Unique() {
+    return $ CYIdentifier($pool.strcat("$cy", $pool.itoa(unique_++), NULL));
+}
+

 CYStatement *CYContinue::Replace(CYContext &context) {
     return this;
 }
 
 CYStatement *CYContinue::Replace(CYContext &context) {
     return this;
 }
 

+CYStatement *CYDebugger::Replace(CYContext &context) {
+    return this;
+}
+

 CYAssignment *CYDeclaration::Assignment(CYContext &context) {
 CYAssignment *CYDeclaration::Assignment(CYContext &context) {

-    CYExpression *variable(Replace(context));
-    return initialiser_ == NULL ? NULL : $ CYAssign(variable, initialiser_);
+    if (initialiser_ == NULL)
+        return NULL;
+
+    CYAssignment *value($ CYAssign(Variable(context), initialiser_));
+    initialiser_ = NULL;
+    return value;
+}
+
+CYVariable *CYDeclaration::Variable(CYContext &context) {
+    return $V(identifier_);

 }
 
 }
 

-CYExpression *CYDeclaration::ForEachIn(CYContext &context) {
-    return $ CYVariable(identifier_);
+CYStatement *CYDeclaration::ForEachIn(CYContext &context, CYExpression *value) {
+    return $ CYVar($L1($ CYDeclaration(identifier_, value)));

 }
 
 CYExpression *CYDeclaration::Replace(CYContext &context) {
     context.Replace(identifier_);
     context.scope_->Declare(context, identifier_, CYIdentifierVariable);
 }
 
 CYExpression *CYDeclaration::Replace(CYContext &context) {
     context.Replace(identifier_);
     context.scope_->Declare(context, identifier_, CYIdentifierVariable);

-    return $ CYVariable(identifier_);
+    return Variable(context);

 }
 
 }
 

-CYProperty *CYDeclarations::Property(CYContext &context) { $T(NULL)
-    return $ CYProperty(declaration_->identifier_, declaration_->initialiser_ ?: $U, next_->Property(context));
+void CYDeclarations::Replace(CYContext &context) { $T()
+    declaration_->Replace(context);
+    next_->Replace(context);

 }
 
 }
 

-CYCompound *CYDeclarations::Replace(CYContext &context) {
-    CYCompound *compound;
-    if (next_ == NULL) compound:
-        compound = $ CYCompound();
-    else {
-        compound = next_->Replace(context);
-        if (compound == NULL)
-            goto compound;
-    }
+CYFunctionParameter *CYDeclarations::Parameter(CYContext &context) { $T(NULL)
+    return $ CYFunctionParameter($ CYDeclaration(declaration_->identifier_), next_->Parameter(context));
+}

 
 

+CYArgument *CYDeclarations::Argument(CYContext &context) { $T(NULL)
+    return $ CYArgument(declaration_->initialiser_, next_->Argument(context));
+}
+
+CYExpression *CYDeclarations::Expression(CYContext &context) { $T(NULL)
+    CYExpression *compound(next_->Expression(context));

     if (CYAssignment *assignment = declaration_->Assignment(context))
     if (CYAssignment *assignment = declaration_->Assignment(context))

-        compound->AddPrev(assignment);
+        if (compound == NULL)
+            compound = assignment;
+        else
+            compound = $ CYCompound(assignment, compound);

     return compound;
 }
 
 CYExpression *CYDirectMember::Replace(CYContext &context) {
     return compound;
 }
 
 CYExpression *CYDirectMember::Replace(CYContext &context) {

-    Replace_(context);
+    context.Replace(object_);
+    context.Replace(property_);

     return this;
 }
 
 CYStatement *CYDoWhile::Replace(CYContext &context) {
     context.Replace(test_);
     return this;
 }
 
 CYStatement *CYDoWhile::Replace(CYContext &context) {
     context.Replace(test_);

-    context.Replace(code_);
+    context.ReplaceAll(code_);

     return this;
 }
 
     return this;
 }
 

-void CYElement::Replace(CYContext &context) { $T()
+void CYElementSpread::Replace(CYContext &context) {

     context.Replace(value_);
     context.Replace(value_);

-    next_->Replace(context);

 }
 
 }
 

-CYStatement *CYEmpty::Collapse(CYContext &context) {
-    return next_;
+void CYElementValue::Replace(CYContext &context) {
+    context.Replace(value_);
+    if (next_ != NULL)
+        next_->Replace(context);

 }
 
 CYStatement *CYEmpty::Replace(CYContext &context) {
 }
 
 CYStatement *CYEmpty::Replace(CYContext &context) {

-    return this;
+    return NULL;

 }
 
 }
 

-CYStatement *CYExpress::Collapse(CYContext &context) {
-    if (CYExpress *express = dynamic_cast<CYExpress *>(next_)) {
-        CYCompound *next(dynamic_cast<CYCompound *>(express->expression_));
-        if (next == NULL)
-            next = $ CYCompound(express->expression_);
-        next->AddPrev(expression_);
-        expression_ = next;
-        SetNext(express->next_);
-    }
+CYExpression *CYEncodedType::Replace(CYContext &context) {
+    return typed_->Replace(context);
+}

 
 

-    return this;
+CYStatement *CYExpress::Return() {
+    return $ CYReturn(expression_);

 }
 
 CYStatement *CYExpress::Replace(CYContext &context) {
     context.Replace(expression_);
 }
 
 CYStatement *CYExpress::Replace(CYContext &context) {
     context.Replace(expression_);

-    if (expression_ == NULL)
-        return $ CYEmpty();

     return this;
 }
 
     return this;
 }
 

-CYExpression *CYExpression::ClassName(CYContext &context, bool object) {
-    return this;
+CYExpression *CYExpression::AddArgument(CYContext &context, CYExpression *value) {
+    return $C1(this, value);

 }
 
 }
 

-CYExpression *CYExpression::ForEachIn(CYContext &context) {
-    return this;
+CYStatement *CYExpression::ForEachIn(CYContext &context, CYExpression *value) {
+    return $E($ CYAssign(this, value));

 }
 
 }
 

-CYExpression *CYExpression::ReplaceAll(CYContext &context) { $T(NULL)
-    CYExpression *replace(this);
-    context.Replace(replace);
+CYAssignment *CYExpression::Assignment(CYContext &context) {
+    return NULL;
+}

 
 

-    if (CYExpression *next = next_->ReplaceAll(context))
-        replace->SetNext(next);
-    else
-        replace->SetNext(next_);
+CYFunctionParameter *CYExpression::Parameter() const {
+    return NULL;
+}

 
 

-    return replace;
+CYStatement *CYExternal::Replace(CYContext &context) {
+    return $E($ CYAssign($V(typed_->identifier_), $C1(typed_->Replace(context), $C2($V("dlsym"), $V("RTLD_DEFAULT"), $S(typed_->identifier_->Word())))));

 }
 
 CYNumber *CYFalse::Number(CYContext &context) {
 }
 
 CYNumber *CYFalse::Number(CYContext &context) {


@@ -276,109 +405,181 @@ CYString *CYFalse::String(CYContext &context) {
     return $S("false");
 }
 
     return $S("false");
 }
 

+CYExpression *CYFatArrow::Replace(CYContext &context) {
+    CYFunctionExpression *function($ CYFunctionExpression(NULL, parameters_, code_));
+    function->this_.SetNext(context.this_);
+    return function;
+}
+

 void CYFinally::Replace(CYContext &context) { $T()
 void CYFinally::Replace(CYContext &context) { $T()

-    code_.Replace(context);
+    context.ReplaceAll(code_);

 }
 
 CYStatement *CYFor::Replace(CYContext &context) {
     context.Replace(initialiser_);
     context.Replace(test_);
     context.Replace(increment_);
 }
 
 CYStatement *CYFor::Replace(CYContext &context) {
     context.Replace(initialiser_);
     context.Replace(test_);
     context.Replace(increment_);

-    context.Replace(code_);
+    context.ReplaceAll(code_);

     return this;
 }
 
     return this;
 }
 

+CYExpression *CYForDeclarations::Replace(CYContext &context) {
+    declarations_->Replace(context);
+    return declarations_->Expression(context);
+}
+
+// XXX: this still feels highly suboptimal

 CYStatement *CYForIn::Replace(CYContext &context) {
 CYStatement *CYForIn::Replace(CYContext &context) {

-    // XXX: this actually might need a prefix statement
+    if (CYAssignment *assignment = initialiser_->Assignment(context))
+        return $ CYBlock($$->*
+            $E(assignment)->*
+            this
+        );
+

     context.Replace(initialiser_);
     context.Replace(set_);
     context.Replace(initialiser_);
     context.Replace(set_);

-    context.Replace(code_);
+    context.ReplaceAll(code_);

     return this;
 }
 
 CYFunctionParameter *CYForInComprehension::Parameter(CYContext &context) const {
     return this;
 }
 
 CYFunctionParameter *CYForInComprehension::Parameter(CYContext &context) const {

-    return $ CYFunctionParameter(name_);
+    return $ CYFunctionParameter(declaration_);

 }
 
 CYStatement *CYForInComprehension::Replace(CYContext &context, CYStatement *statement) const {
 }
 
 CYStatement *CYForInComprehension::Replace(CYContext &context, CYStatement *statement) const {

-    return $ CYForIn($ CYVariable(name_), set_, CYComprehension::Replace(context, statement));
+    return $ CYForIn(declaration_->Variable(context), set_, CYComprehension::Replace(context, statement));

 }
 
 }
 

-CYStatement *CYForEachIn::Replace(CYContext &context) {
-    CYVariable *cys($V("$cys")), *cyt($V("$cyt"));
+CYStatement *CYForOf::Replace(CYContext &context) {
+    if (CYAssignment *assignment = initialiser_->Assignment(context))
+        return $ CYBlock($$->*
+            $E(assignment)->*
+            this
+        );

 
 

-    return $ CYLet($L2($L($I("$cys"), set_), $L($I("$cyt"))), $$->*
-        $ CYForIn(cyt, cys, $ CYBlock($$->*
-            $E($ CYAssign(initialiser_->ForEachIn(context), $M(cys, cyt)))->*
-            code_
-        ))
-    );
+    CYIdentifier *cys(context.Unique()), *cyt(context.Unique());
+
+    return $ CYBlock($$
+        ->* $ CYLet($L2($L(cys, set_), $L(cyt)))
+        ->* $ CYForIn($V(cyt), $V(cys), $ CYBlock($$
+            ->* initialiser_->ForEachIn(context, $M($V(cys), $V(cyt)))
+            ->* code_
+    )));

 }
 
 }
 

-CYFunctionParameter *CYForEachInComprehension::Parameter(CYContext &context) const {
-    return $ CYFunctionParameter(name_);
+CYFunctionParameter *CYForOfComprehension::Parameter(CYContext &context) const {
+    return $ CYFunctionParameter(declaration_);

 }
 
 }
 

-CYStatement *CYForEachInComprehension::Replace(CYContext &context, CYStatement *statement) const {
-    CYVariable *cys($V("$cys")), *name($ CYVariable(name_));
+CYStatement *CYForOfComprehension::Replace(CYContext &context, CYStatement *statement) const {
+    CYIdentifier *cys($I("$cys"));

 
 

-    return $E($C0($F(NULL, $P1("$cys"), $$->*
-        $E($ CYAssign(cys, set_))->*
-        $ CYForIn(name, cys, $ CYBlock($$->*
-            $E($ CYAssign(name, $M(cys, name)))->*
+    return $E($C0($F(NULL, $P1($L($I("$cys"))), $$->*
+        $E($ CYAssign($V(cys), set_))->*
+        $ CYForIn(declaration_->Variable(context), $V(cys), $ CYBlock($$->*
+            $E($ CYAssign(declaration_->Variable(context), $M($V(cys), declaration_->Variable(context))))->*

             CYComprehension::Replace(context, statement)
         ))
     )));
 }
 
             CYComprehension::Replace(context, statement)
         ))
     )));
 }
 

-void CYFunction::Inject(CYContext &context) {
-    name_ = name_->Replace(context);
-    context.scope_->Declare(context, name_, CYIdentifierOther);
-}
+void CYFunction::Replace(CYContext &context) {
+    CYThisScope *_this(context.this_);
+    context.this_ = &this_;
+    context.this_ = CYGetLast(context.this_);

 
 

-void CYFunction::Replace_(CYContext &context, bool outer) {
-    if (outer)
-        Inject(context);
+    CYIdentifier *super(context.super_);
+    context.super_ = super_;

 
 

-    parent_ = context.scope_;
-    context.scope_ = this;
+    CYNonLocal *nonlocal(context.nonlocal_);
+    CYNonLocal *nextlocal(context.nextlocal_);

 
 

-    if (!outer && name_ != NULL)
-        Inject(context);
+    bool localize;
+    if (nonlocal_ != NULL) {
+        localize = false;
+        context.nonlocal_ = nonlocal_;
+    } else {
+        localize = true;
+        nonlocal_ = $ CYNonLocal();
+        context.nextlocal_ = nonlocal_;
+    }

 
 

-    parameters_->Replace(context);
-    code_.Replace(context);
+    CYScope scope(!localize, context);

 
 

-    context.scope_ = parent_;
-    Scope(context, code_.statements_);
+    parameters_->Replace(context, code_);
+
+    context.ReplaceAll(code_);
+
+    if (implicit_)
+        CYImplicitReturn(code_);
+
+    if (CYIdentifier *identifier = this_.identifier_) {
+        context.scope_->Declare(context, identifier, CYIdentifierVariable);
+        code_ = $$
+            ->*$E($ CYAssign($V(identifier), $ CYThis()))
+            ->*code_
+        ;
+    }
+
+    if (localize)
+        context.NonLocal(code_);
+
+    context.nextlocal_ = nextlocal;
+    context.nonlocal_ = nonlocal;
+
+    context.super_ = super;
+    context.this_ = _this;
+
+    scope.Close(context, code_);

 }
 
 CYExpression *CYFunctionExpression::Replace(CYContext &context) {
 }
 
 CYExpression *CYFunctionExpression::Replace(CYContext &context) {

-    Replace_(context, false);
+    CYScope scope(false, context);
+    if (name_ != NULL)
+        context.scope_->Declare(context, name_, CYIdentifierOther);
+    CYFunction::Replace(context);
+    scope.Close(context, code_);

     return this;
 }
 
     return this;
 }
 

-void CYFunctionParameter::Replace(CYContext &context) { $T()
-    name_ = name_->Replace(context);
-    context.scope_->Declare(context, name_, CYIdentifierArgument);
-    next_->Replace(context);
+void CYFunctionParameter::Replace(CYContext &context, CYStatement *&statements) { $T()
+    CYAssignment *assignment(initialiser_->Assignment(context));
+    context.Replace(initialiser_);
+
+    next_->Replace(context, statements);
+
+    if (assignment != NULL)
+        statements = $$->*
+            // XXX: this cast is quite incorrect
+            $ CYIf($ CYIdentical($ CYTypeOf(dynamic_cast<CYExpression *>(initialiser_)), $S("undefined")), $$->*
+                $E(assignment)
+            )->*
+            statements;

 }
 
 CYStatement *CYFunctionStatement::Replace(CYContext &context) {
 }
 
 CYStatement *CYFunctionStatement::Replace(CYContext &context) {

-    Replace_(context, true);
+    context.scope_->Declare(context, name_, CYIdentifierOther);
+    CYFunction::Replace(context);

     return this;
 }
 
 CYIdentifier *CYIdentifier::Replace(CYContext &context) {
     return this;
 }
 
 CYIdentifier *CYIdentifier::Replace(CYContext &context) {

-    if (replace_ == NULL)
-        replace_ = context.scope_->Lookup(context, this);
+    if (replace_ != NULL && replace_ != this)
+        return replace_->Replace(context);
+    replace_ = context.scope_->Lookup(context, this);

     return replace_;
 }
 
     return replace_;
 }
 

+CYStatement *CYIf::Return() {
+    CYImplicitReturn(true_);
+    CYImplicitReturn(false_);
+    return this;
+}
+

 CYStatement *CYIf::Replace(CYContext &context) {
     context.Replace(test_);
 CYStatement *CYIf::Replace(CYContext &context) {
     context.Replace(test_);

-    context.Replace(true_);
-    context.Replace(false_);
+    context.ReplaceAll(true_);
+    context.ReplaceAll(false_);

     return this;
 }
 
     return this;
 }
 


@@ -390,13 +591,15 @@ CYStatement *CYIfComprehension::Replace(CYContext &context, CYStatement *stateme
     return $ CYIf(test_, CYComprehension::Replace(context, statement));
 }
 
     return $ CYIf(test_, CYComprehension::Replace(context, statement));
 }
 

+CYStatement *CYImport::Replace(CYContext &context) {
+    return $ CYVar($L1($L($I(module_->part_->Word()), $C1($V("require"), module_->Replace(context, "/")))));
+}
+

 CYExpression *CYIndirect::Replace(CYContext &context) {
 CYExpression *CYIndirect::Replace(CYContext &context) {

-    CYPrefix::Replace(context);

     return $M(rhs_, $S("$cyi"));
 }
 
 CYExpression *CYIndirectMember::Replace(CYContext &context) {
     return $M(rhs_, $S("$cyi"));
 }
 
 CYExpression *CYIndirectMember::Replace(CYContext &context) {

-    Replace_(context);

     return $M($ CYIndirect(object_), property_);
 }
 
     return $M($ CYIndirect(object_), property_);
 }
 


@@ -411,21 +614,57 @@ CYStatement *CYLabel::Replace(CYContext &context) {
     return this;
 }
 
     return this;
 }
 

+CYExpression *CYLambda::Replace(CYContext &context) {
+    return $N2($V("Functor"), $ CYFunctionExpression(NULL, parameters_->Parameters(context), code_), parameters_->TypeSignature(context, typed_->Replace(context)));
+}
+

 CYStatement *CYLet::Replace(CYContext &context) {
 CYStatement *CYLet::Replace(CYContext &context) {

-    return $ CYWith($ CYObject(declarations_->Property(context)), &code_);
+    declarations_->Replace(context);
+    if (CYExpression *expression = declarations_->Expression(context))
+        return $E(expression);
+    return $ CYEmpty();

 }
 
 }
 

-void CYMember::Replace_(CYContext &context) {
-    context.Replace(object_);
-    context.Replace(property_);
+CYFunctionExpression *CYMethod::Constructor() {
+    return NULL;
+}
+
+void CYMethod::Replace(CYContext &context) {
+    CYFunction::Replace(context);
+}
+
+CYString *CYModule::Replace(CYContext &context, const char *separator) const {
+    if (next_ == NULL)
+        return $ CYString(part_);
+    return $ CYString($pool.strcat(next_->Replace(context, separator)->Value(), separator, part_->Word(), NULL));
+}
+
+CYExpression *CYMultiply::Replace(CYContext &context) {
+    CYInfix::Replace(context);
+
+    if (CYNumber *lhn = lhs_->Number(context))
+        if (CYNumber *rhn = rhs_->Number(context))
+            return $D(lhn->Value() * rhn->Value());
+
+    return this;

 }
 
 }
 

-CYExpression *CYNew::Replace(CYContext &context) {
+namespace cy {
+namespace Syntax {
+
+CYExpression *New::AddArgument(CYContext &context, CYExpression *value) {
+    CYSetLast(arguments_) = $ CYArgument(value);
+    return this;
+}
+
+CYExpression *New::Replace(CYContext &context) {

     context.Replace(constructor_);
     arguments_->Replace(context);
     return this;
 }
 
     context.Replace(constructor_);
     arguments_->Replace(context);
     return this;
 }
 

+} }
+

 CYNumber *CYNull::Number(CYContext &context) {
     return $D(0);
 }
 CYNumber *CYNull::Number(CYContext &context) {
     return $D(0);
 }


@@ -440,14 +679,34 @@ CYNumber *CYNumber::Number(CYContext &context) {
 
 CYString *CYNumber::String(CYContext &context) {
     // XXX: there is a precise algorithm for this
 
 CYString *CYNumber::String(CYContext &context) {
     // XXX: there is a precise algorithm for this

-    return $S(apr_psprintf(context.pool_, "%.17g", Value()));
+    return $S($pool.sprintf(24, "%.17g", Value()));
+}
+
+CYExpression *CYNumber::PropertyName(CYContext &context) {
+    return String(context);

 }
 
 CYExpression *CYObject::Replace(CYContext &context) {
 }
 
 CYExpression *CYObject::Replace(CYContext &context) {

-    properties_->Replace(context);
+    CYBuilder builder;
+    if (properties_ != NULL)
+        properties_ = properties_->ReplaceAll(context, builder, $ CYThis(), false);
+
+    if (builder) {
+        return $C1($M($ CYFunctionExpression(NULL, builder.declarations_->Parameter(context),
+            builder.statements_->*
+                $ CYReturn($ CYThis())
+        ), $S("call")), this, builder.declarations_->Argument(context));
+    }
+
+    CYForEach (property, properties_)
+        property->Replace(context);

     return this;
 }
 
     return this;
 }
 

+CYExpression *CYParenthetical::Replace(CYContext &context) {
+    return expression_;
+}
+

 CYExpression *CYPostfix::Replace(CYContext &context) {
     context.Replace(lhs_);
     return this;
 CYExpression *CYPostfix::Replace(CYContext &context) {
     context.Replace(lhs_);
     return this;


@@ -458,27 +717,115 @@ CYExpression *CYPrefix::Replace(CYContext &context) {
     return this;
 }
 
     return this;
 }
 

-void CYProgram::Replace(CYContext &context) {
-    parent_ = context.scope_;
-    CYProgram *program(context.program_);
+CYProperty *CYProperty::ReplaceAll(CYContext &context, CYBuilder &builder, CYExpression *self, bool update) {
+    update |= name_->Computed();
+    if (update)
+        Replace(context, builder, self, false);
+    if (next_ != NULL)
+        next_ = next_->ReplaceAll(context, builder, self, update);
+    return update ? next_ : this;
+}

 
 

-    context.scope_ = this;
-    context.program_ = this;
+void CYProperty::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, bool protect) {
+    CYExpression *name(name_->PropertyName(context));
+    if (name_->Computed()) {
+        CYIdentifier *unique(context.Unique());
+        builder.declarations_->*$L1($L(unique, name));
+        name = $V(unique);
+    }

 
 

-    statements_ = statements_->ReplaceAll(context);
+    Replace(context, builder, self, name, protect);
+}

 
 

-    context.scope_ = parent_;
-    context.program_ = program;
-    Scope(context, statements_);
+void CYPropertyGetter::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
+    CYIdentifier *unique(context.Unique());
+    builder.declarations_
+        ->* $L1($L(unique, CYSuperize(context, $ CYFunctionExpression(NULL, parameters_, code_))));
+    builder.statements_
+        ->* CYDefineProperty(self, name, true, !protect, $ CYPropertyValue($S("get"), $V(unique)));
+}
+
+CYFunctionExpression *CYPropertyMethod::Constructor() {
+    return name_->Constructor() ? $ CYFunctionExpression(NULL, parameters_, code_) : NULL;
+}
+
+void CYPropertyMethod::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
+    CYIdentifier *unique(context.Unique());
+    builder.declarations_
+        ->* $L1($L(unique, CYSuperize(context, $ CYFunctionExpression(NULL, parameters_, code_))));
+    builder.statements_
+        ->* (!protect ? $E($ CYAssign($M(self, name), $V(unique))) :
+            CYDefineProperty(self, name, true, !protect, $ CYPropertyValue($S("value"), $V(unique), $ CYPropertyValue($S("writable"), $ CYTrue()))));
+}
+
+void CYPropertySetter::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
+    CYIdentifier *unique(context.Unique());
+    builder.declarations_
+        ->* $L1($L(unique, CYSuperize(context, $ CYFunctionExpression(NULL, parameters_, code_))));
+    builder.statements_
+        ->* CYDefineProperty(self, name, true, !protect, $ CYPropertyValue($S("set"), $V(unique)));
+}
+
+void CYPropertyValue::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
+    _assert(!protect);
+    CYIdentifier *unique(context.Unique());
+    builder.declarations_
+        ->* $L1($L(unique, value_));
+    builder.statements_
+        ->* $E($ CYAssign($M(self, name), $V(unique)));
+}
+
+void CYPropertyValue::Replace(CYContext &context) {
+    context.Replace(value_);
+}
+
+// XXX: this is evil evil black magic. don't ask, don't tell... don't believe!
+#define MappingSet "0etnirsoalfucdphmgyvbxTwSNECAFjDLkMOIBPqzRH$_WXUVGYKQJZ"
+//#define MappingSet "0abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_"
+
+namespace {
+    struct IdentifierUsageLess :
+        std::binary_function<CYIdentifier *, CYIdentifier *, bool>
+    {
+        _finline bool operator ()(CYIdentifier *lhs, CYIdentifier *rhs) const {
+            if (lhs->usage_ != rhs->usage_)
+                return lhs->usage_ > rhs->usage_;
+            return lhs < rhs;
+        }
+    };
+
+    typedef std::set<CYIdentifier *, IdentifierUsageLess> IdentifierUsages;
+}
+
+void CYScript::Replace(CYContext &context) {
+    CYScope scope(true, context);
+
+    context.nextlocal_ = $ CYNonLocal();
+    context.ReplaceAll(code_);
+    context.NonLocal(code_);
+
+    scope.Close(context, code_);

 
     size_t offset(0);
 
 
     size_t offset(0);
 

+    CYCStringSet external;
+    for (CYIdentifierValueSet::const_iterator i(scope.identifiers_.begin()); i != scope.identifiers_.end(); ++i)
+        external.insert((*i)->Word());
+
+    IdentifierUsages usages;
+
+    if (offset < context.rename_.size())
+        CYForEach (i, context.rename_[offset].identifier_)
+            usages.insert(i);
+

     // XXX: totalling the probable occurrences and sorting by them would improve the result
     // XXX: totalling the probable occurrences and sorting by them would improve the result

-    for (CYIdentifierAddressVector::const_iterator i(rename_.begin()); i != rename_.end(); ++i, ++offset) {
+    for (CYIdentifierUsageVector::const_iterator i(context.rename_.begin()); i != context.rename_.end(); ++i, ++offset) {
+        //std::cout << *i << ":" << (*i)->offset_ << std::endl;
+

         const char *name;
 
         if (context.options_.verbose_)
         const char *name;
 
         if (context.options_.verbose_)

-            name = apr_psprintf(context.pool_, "$%"APR_SIZE_T_FMT"", offset);
+            name = $pool.strcat("$", $pool.itoa(offset), NULL);

         else {
             char id[8];
             id[7] = '\0';
         else {
             char id[8];
             id[7] = '\0';


@@ -487,37 +834,64 @@ void CYProgram::Replace(CYContext &context) {
             unsigned position(7), local(offset + 1);
 
             do {
             unsigned position(7), local(offset + 1);
 
             do {

-                unsigned index(local % 53);
-                local /= 53;
-                id[--position] = index == 0 ? '0' : index < 27 ? index - 1 + 'a' : index - 27 + 'A';
+                unsigned index(local % (sizeof(MappingSet) - 1));
+                local /= sizeof(MappingSet) - 1;
+                id[--position] = MappingSet[index];

             } while (local != 0);
 
             } while (local != 0);
 

-            if (external_.find(id + position) != external_.end()) {
+            if (external.find(id + position) != external.end()) {

                 ++offset;
                 goto id;
             }
 
                 ++offset;
                 goto id;
             }
 

-            name = apr_pstrmemdup(context.pool_, id + position, 7 - position);
+            name = $pool.strmemdup(id + position, 7 - position);

             // XXX: at some point, this could become a keyword
         }
 
             // XXX: at some point, this could become a keyword
         }
 

-        for (CYIdentifier *identifier(*i); identifier != NULL; identifier = identifier->next_)
+        CYForEach (identifier, i->identifier_)

             identifier->Set(name);
     }
 }
 
             identifier->Set(name);
     }
 }
 

-void CYProperty::Replace(CYContext &context) { $T()
-    context.Replace(value_);
-    next_->Replace(context);
-}
-

 CYStatement *CYReturn::Replace(CYContext &context) {
 CYStatement *CYReturn::Replace(CYContext &context) {

+    if (context.nonlocal_ != NULL) {
+        CYProperty *value(value_ == NULL ? NULL : $ CYPropertyValue($S("$cyv"), value_));
+        return $ cy::Syntax::Throw($ CYObject(
+            $ CYPropertyValue($S("$cyk"), $V(context.nonlocal_->Target(context)), value)
+        ));
+    }
+

     context.Replace(value_);
     return this;
 }
 
     context.Replace(value_);
     return this;
 }
 

+CYExpression *CYRubyBlock::Replace(CYContext &context) {
+    return call_->AddArgument(context, proc_->Replace(context));
+}
+
+CYExpression *CYRubyBlock::AddArgument(CYContext &context, CYExpression *value) {
+    return Replace(context)->AddArgument(context, value);
+}
+
+CYExpression *CYRubyProc::Replace(CYContext &context) {
+    CYFunctionExpression *function($ CYFunctionExpression(NULL, parameters_, code_));
+    function = CYNonLocalize(context, function);
+    function->implicit_ = true;
+    return function;
+}
+
+CYScope::CYScope(bool transparent, CYContext &context) :
+    transparent_(transparent),
+    parent_(context.scope_)
+{
+    context.scope_ = this;
+}
+

 void CYScope::Declare(CYContext &context, CYIdentifier *identifier, CYIdentifierFlags flags) {
 void CYScope::Declare(CYContext &context, CYIdentifier *identifier, CYIdentifierFlags flags) {

-    internal_.insert(CYIdentifierAddressFlagsMap::value_type(identifier, flags));
+    if (!transparent_ || flags == CYIdentifierArgument || flags == CYIdentifierCatch)
+        internal_.insert(CYIdentifierAddressFlagsMap::value_type(identifier, flags));
+    else if (parent_ != NULL)
+        parent_->Declare(context, identifier, flags);

 }
 
 CYIdentifier *CYScope::Lookup(CYContext &context, CYIdentifier *identifier) {
 }
 
 CYIdentifier *CYScope::Lookup(CYContext &context, CYIdentifier *identifier) {


@@ -525,42 +899,84 @@ CYIdentifier *CYScope::Lookup(CYContext &context, CYIdentifier *identifier) {
     return *insert.first;
 }
 
     return *insert.first;
 }
 

-void CYScope::Merge(CYContext &context, CYIdentifierAddressVector &external) {
-    for (CYIdentifierAddressVector::const_iterator i(external.begin()); i != external.end(); ++i) {
-        std::pair<CYIdentifierAddressSet::iterator, bool> insert(identifiers_.insert(*i));
-        if (!insert.second)
-            (*i)->replace_ = *insert.first;
+void CYScope::Merge(CYContext &context, CYIdentifier *identifier) {
+    std::pair<CYIdentifierValueSet::iterator, bool> insert(identifiers_.insert(identifier));
+    if (!insert.second) {
+        if ((*insert.first)->offset_ < identifier->offset_)
+            (*insert.first)->offset_ = identifier->offset_;
+        identifier->replace_ = *insert.first;
+        (*insert.first)->usage_ += identifier->usage_ + 1;

     }
 }
 
     }
 }
 

-void CYScope::Scope(CYContext &context, CYStatement *&statements) {
-    CYIdentifierAddressVector external;
+namespace {
+    struct IdentifierOffset {
+        size_t offset_;
+        CYIdentifierFlags flags_;
+        size_t usage_;
+        CYIdentifier *identifier_;

 
 

-    for (CYIdentifierValueSet::const_iterator i(identifiers_.begin()); i != identifiers_.end(); ++i)
-        if (internal_.find(*i) == internal_.end())
-            external.push_back(*i);
+        IdentifierOffset(CYIdentifier *identifier, CYIdentifierFlags flags) :
+            offset_(identifier->offset_),
+            flags_(flags),
+            usage_(identifier->usage_),
+            identifier_(identifier)
+        {
+        }
+    };
+
+    struct IdentifierOffsetLess :
+        std::binary_function<const IdentifierOffset &, const IdentifierOffset &, bool>
+    {
+        _finline bool operator ()(const IdentifierOffset &lhs, const IdentifierOffset &rhs) const {
+            if (lhs.offset_ != rhs.offset_)
+                return lhs.offset_ < rhs.offset_;
+            if (lhs.flags_ != rhs.flags_)
+                return lhs.flags_ < rhs.flags_;
+            /*if (lhs.usage_ != rhs.usage_)
+                return lhs.usage_ < rhs.usage_;*/
+            return lhs.identifier_ < rhs.identifier_;
+        }
+    };
+
+    typedef std::set<IdentifierOffset, IdentifierOffsetLess> IdentifierOffsets;
+}
+
+void CYScope::Close(CYContext &context, CYStatement *&statements) {
+    context.scope_ = parent_;
+
+    if (parent_ == NULL)
+        return;

 
     CYDeclarations *last(NULL), *curr(NULL);
 
     CYDeclarations *last(NULL), *curr(NULL);

-    CYProgram *program(context.program_);
-
-    // XXX: we don't want to do this in order, we want to sort it by probable occurrence
-    for (CYIdentifierAddressFlagsMap::const_iterator i(internal_.begin()); i != internal_.end(); ++i) {
-        if (program != NULL && i->second != CYIdentifierMagic) {
-            if (program->rename_.size() <= offset_)
-                program->rename_.resize(offset_ + 1);
-            CYIdentifier *&identifier(program->rename_[offset_++]);
-            i->first->SetNext(identifier);
-            identifier = i->first;
-        }

 
 

-        if (i->second == CYIdentifierVariable) {
-            CYDeclarations *next($ CYDeclarations($ CYDeclaration(i->first)));
+    IdentifierOffsets offsets;
+
+    for (CYIdentifierAddressFlagsMap::const_iterator i(internal_.begin()); i != internal_.end(); ++i)
+        if (i->second != CYIdentifierMagic)
+            offsets.insert(IdentifierOffset(i->first, i->second));
+
+    size_t offset(0);
+
+    for (IdentifierOffsets::const_iterator i(offsets.begin()); i != offsets.end(); ++i) {
+        if (i->flags_ == CYIdentifierVariable) {
+            CYDeclarations *next($ CYDeclarations($ CYDeclaration(i->identifier_)));

             if (last == NULL)
                 last = next;
             if (curr != NULL)
                 curr->SetNext(next);
             curr = next;
         }
             if (last == NULL)
                 last = next;
             if (curr != NULL)
                 curr->SetNext(next);
             curr = next;
         }

+
+        if (offset < i->offset_)
+            offset = i->offset_;
+        if (context.rename_.size() <= offset)
+            context.rename_.resize(offset + 1);
+
+        CYIdentifierUsage &rename(context.rename_[offset++]);
+        i->identifier_->SetNext(rename.identifier_);
+        rename.identifier_ = i->identifier_;
+        rename.usage_ += i->identifier_->usage_ + 1;

     }
 
     if (last != NULL) {
     }
 
     if (last != NULL) {


@@ -569,29 +985,26 @@ void CYScope::Scope(CYContext &context, CYStatement *&statements) {
         statements = var;
     }
 
         statements = var;
     }
 

-    if (parent_ != NULL) {
-        if (parent_->offset_ < offset_)
-            parent_->offset_ = offset_;
-        parent_->Merge(context, external);
-    } else if (program != NULL)
-        for (CYIdentifierAddressVector::const_iterator i(external.begin()); i != external.end(); ++i)
-            program->external_.insert((*i)->Word());
+    for (CYIdentifierValueSet::const_iterator i(identifiers_.begin()); i != identifiers_.end(); ++i)
+        if (internal_.find(*i) == internal_.end()) {
+            //std::cout << *i << '=' << offset << std::endl;
+            if ((*i)->offset_ < offset)
+                (*i)->offset_ = offset;
+            parent_->Merge(context, *i);
+        }

 }
 
 }
 

-CYStatement *CYStatement::Collapse(CYContext &context) {
-    return this;
+CYElementValue *CYSpan::Replace(CYContext &context) { $T(NULL)
+    return $ CYElementValue(expression_, $ CYElementValue(string_, next_->Replace(context)));

 }
 
 }
 

-CYStatement *CYStatement::ReplaceAll(CYContext &context) { $T(NULL)
-    CYStatement *replace(this);
-    context.Replace(replace);
-    replace->SetNext(next_->ReplaceAll(context));
-    return replace->Collapse(context);
+CYStatement *CYStatement::Return() {
+    return this;

 }
 
 CYString *CYString::Concat(CYContext &context, CYString *rhs) const {
     size_t size(size_ + rhs->size_);
 }
 
 CYString *CYString::Concat(CYContext &context, CYString *rhs) const {
     size_t size(size_ + rhs->size_);

-    char *value(new(context.pool_) char[size + 1]);
+    char *value($ char[size + 1]);

     memcpy(value, value_, size_);
     memcpy(value + size_, rhs->value_, rhs->size_);
     value[size] = '\0';
     memcpy(value, value_, size_);
     memcpy(value + size_, rhs->value_, rhs->size_);
     value[size] = '\0';


@@ -603,17 +1016,35 @@ CYNumber *CYString::Number(CYContext &context) {
     return NULL;
 }
 
     return NULL;
 }
 

+CYExpression *CYString::PropertyName(CYContext &context) {
+    return this;
+}
+

 CYString *CYString::String(CYContext &context) {
     return this;
 }
 
 CYString *CYString::String(CYContext &context) {
     return this;
 }
 

+CYExpression *CYSuperAccess::Replace(CYContext &context) {
+    return $C1($M($M($M($V(context.super_), $S("prototype")), property_), $S("bind")), $ CYThis());
+}
+
+CYExpression *CYSuperCall::Replace(CYContext &context) {
+    return $C($C1($M($V(context.super_), $S("bind")), $ CYThis()), arguments_);
+}
+

 CYStatement *CYSwitch::Replace(CYContext &context) {
     context.Replace(value_);
     clauses_->Replace(context);
     return this;
 }
 
 CYStatement *CYSwitch::Replace(CYContext &context) {
     context.Replace(value_);
     clauses_->Replace(context);
     return this;
 }
 

+CYExpression *CYTemplate::Replace(CYContext &context) {
+    return $C2($M($M($M($V("String"), $S("prototype")), $S("concat")), $S("apply")), $S(""), $ CYArray($ CYElementValue(string_, spans_->Replace(context))));
+}
+

 CYExpression *CYThis::Replace(CYContext &context) {
 CYExpression *CYThis::Replace(CYContext &context) {

+    if (context.this_ != NULL)
+        return $V(context.this_->Identifier(context));

     return this;
 }
 
     return this;
 }
 


@@ -643,7 +1074,7 @@ namespace cy {
 namespace Syntax {
 
 CYStatement *Try::Replace(CYContext &context) {
 namespace Syntax {
 
 CYStatement *Try::Replace(CYContext &context) {

-    code_.Replace(context);
+    context.ReplaceAll(code_);

     catch_->Replace(context);
     finally_->Replace(context);
     return this;
     catch_->Replace(context);
     finally_->Replace(context);
     return this;


@@ -651,31 +1082,124 @@ CYStatement *Try::Replace(CYContext &context) {
 
 } }
 
 
 } }
 

+CYExpression *CYTypeArrayOf::Replace_(CYContext &context, CYExpression *type) {
+    return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("arrayOf")), $ CYArgument(size_)));
+}
+
+CYExpression *CYTypeBlockWith::Replace_(CYContext &context, CYExpression *type) {
+    return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("blockWith")), parameters_->Argument(context)));
+}
+
+CYExpression *CYTypeConstant::Replace_(CYContext &context, CYExpression *type) {
+    return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("constant"))));
+}
+
+CYStatement *CYTypeDefinition::Replace(CYContext &context) {
+    return $E($ CYAssign($V(typed_->identifier_), typed_->Replace(context)));
+}
+
+CYExpression *CYTypeError::Replace(CYContext &context) {
+    _assert(false);
+    return NULL;
+}
+
+CYExpression *CYTypeModifier::Replace(CYContext &context, CYExpression *type) { $T(type)
+    return Replace_(context, type);
+}
+
+CYExpression *CYTypeFunctionWith::Replace_(CYContext &context, CYExpression *type) {
+    return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("functionWith")), parameters_->Argument(context)));
+}
+
+CYExpression *CYTypeLong::Replace(CYContext &context) {
+    return $ CYCall($ CYDirectMember(specifier_->Replace(context), $ CYString("long")));
+}
+
+CYExpression *CYTypePointerTo::Replace_(CYContext &context, CYExpression *type) {
+    return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("pointerTo"))));
+}
+
+CYExpression *CYTypeShort::Replace(CYContext &context) {
+    return $ CYCall($ CYDirectMember(specifier_->Replace(context), $ CYString("short")));
+}
+
+CYExpression *CYTypeSigned::Replace(CYContext &context) {
+    return $ CYCall($ CYDirectMember(specifier_->Replace(context), $ CYString("signed")));
+}
+
+CYExpression *CYTypeUnsigned::Replace(CYContext &context) {
+    return $ CYCall($ CYDirectMember(specifier_->Replace(context), $ CYString("unsigned")));
+}
+
+CYExpression *CYTypeVariable::Replace(CYContext &context) {
+    return $V(name_);
+}
+
+CYExpression *CYTypeVoid::Replace(CYContext &context) {
+    return $N1($V("Type"), $ CYString("v"));
+}
+
+CYExpression *CYTypeVolatile::Replace_(CYContext &context, CYExpression *type) {
+    return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("volatile"))));
+}
+
+CYExpression *CYTypedIdentifier::Replace(CYContext &context) {
+    return modifier_->Replace(context, specifier_->Replace(context));
+}
+
+CYTypeFunctionWith *CYTypedIdentifier::Function() {
+    CYTypeModifier **modifier(&modifier_);
+    if (*modifier == NULL)
+        return NULL;
+    while ((*modifier)->next_ != NULL)
+        modifier = &(*modifier)->next_;
+    CYTypeFunctionWith *function((*modifier)->Function());
+    if (function == NULL)
+        return NULL;
+    *modifier = NULL;
+    return function;
+}
+
+CYArgument *CYTypedParameter::Argument(CYContext &context) { $T(NULL)
+    return $ CYArgument(typed_->Replace(context), next_->Argument(context));
+}
+
+CYFunctionParameter *CYTypedParameter::Parameters(CYContext &context) { $T(NULL)
+    return $ CYFunctionParameter($ CYDeclaration(typed_->identifier_ ?: context.Unique()), next_->Parameters(context));
+}
+
+CYExpression *CYTypedParameter::TypeSignature(CYContext &context, CYExpression *prefix) { $T(prefix)
+    return next_->TypeSignature(context, $ CYAdd(prefix, typed_->Replace(context)));
+}
+

 CYStatement *CYVar::Replace(CYContext &context) {
 CYStatement *CYVar::Replace(CYContext &context) {

-    return $E(declarations_->Replace(context));
+    declarations_->Replace(context);
+    if (CYExpression *expression = declarations_->Expression(context))
+        return $E(expression);
+    return $ CYEmpty();

 }
 
 CYExpression *CYVariable::Replace(CYContext &context) {
 }
 
 CYExpression *CYVariable::Replace(CYContext &context) {

-    name_ = name_->Replace(context);
+    context.Replace(name_);

     return this;
 }
 
     return this;
 }
 

+CYFunctionParameter *CYVariable::Parameter() const {
+    return $ CYFunctionParameter($ CYDeclaration(name_));
+}
+

 CYStatement *CYWhile::Replace(CYContext &context) {
     context.Replace(test_);
 CYStatement *CYWhile::Replace(CYContext &context) {
     context.Replace(test_);

-    context.Replace(code_);
+    context.ReplaceAll(code_);

     return this;
 }
 
 CYStatement *CYWith::Replace(CYContext &context) {
     context.Replace(scope_);
     return this;
 }
 
 CYStatement *CYWith::Replace(CYContext &context) {
     context.Replace(scope_);

-    context.Replace(code_);
+    context.ReplaceAll(code_);

     return this;
 }
 
     return this;
 }
 

-CYExpression *CYWord::ClassName(CYContext &context, bool object) {
-    CYString *name($S(this));
-    if (object)
-        return $C1($V("objc_getClass"), name);
-    else
-        return name;
+CYExpression *CYWord::PropertyName(CYContext &context) {
+    return $S(this);

 }
 }