Add a valueOf to Instance.

[cycript.git] / Parser.hpp

diff --git a/Parser.hpp b/Parser.hpp
index bf73389cf415fb3edfe6cf0d9f2061fdd8fcbf49..f48e81bff435c3400645a8665117ad6714fb116b 100644 (file)
--- a/Parser.hpp
+++ b/Parser.hpp
@@ -1,4 +1,4 @@
-/* Cycript - Remove Execution Server and Disassembler
+/* Cycript - Inlining/Optimizing JavaScript Compiler

  * Copyright (C) 2009  Jay Freeman (saurik)
 */
 
  * Copyright (C) 2009  Jay Freeman (saurik)
 */
 


@@ -40,12 +40,24 @@
 #ifndef CYPARSER_HPP
 #define CYPARSER_HPP
 
 #ifndef CYPARSER_HPP
 #define CYPARSER_HPP
 

-#include <cstdlib>
+// XXX: wtf is this here?!
+#define CYPA 16
+
+#include <iostream>
+

 #include <string>
 #include <vector>
 #include <string>
 #include <vector>

+#include <map>
+#include <set>
+
+#include <cstdio>
+#include <cstdlib>

 
 #include "location.hh"
 #include "Pooling.hpp"
 
 #include "location.hh"
 #include "Pooling.hpp"

+#include "Options.hpp"
+
+class CYContext;

 
 template <typename Type_>
 struct CYNext {
 
 template <typename Type_>
 struct CYNext {


@@ -67,24 +79,46 @@ struct CYNext {
 };
 
 struct CYThing {
 };
 
 struct CYThing {

+    virtual ~CYThing() {
+    }
+

     virtual void Output(struct CYOutput &out) const = 0;
 };
 
 struct CYOutput {
     std::ostream &out_;
     virtual void Output(struct CYOutput &out) const = 0;
 };
 
 struct CYOutput {
     std::ostream &out_;

-
-    CYOutput(std::ostream &out) :
-        out_(out)
-    {
-    }
-
-    _finline CYOutput &operator <<(char rhs) {
-        out_ << rhs;
-        return *this;
-    }
-
-    _finline CYOutput &operator <<(const char *rhs) {
-        out_ << rhs;
+    CYOptions &options_;
+    bool pretty_;
+    unsigned indent_;
+    bool right_;
+
+    enum {
+        NoMode,
+        NoLetter,
+        NoPlus,
+        NoHyphen,
+        Terminated
+    } mode_;
+
+    CYOutput(std::ostream &out, CYOptions &options) :
+        out_(out),
+        options_(options),
+        pretty_(false),
+        indent_(0),
+        right_(false),
+        mode_(NoMode)
+    {
+    }
+
+    void Check(char value);
+    void Terminate();
+
+    CYOutput &operator <<(char rhs);
+    CYOutput &operator <<(const char *rhs);
+
+    _finline CYOutput &operator <<(const CYThing *rhs) {
+        if (rhs != NULL)
+            rhs->Output(*this);

         return *this;
     }
 
         return *this;
     }
 


@@ -96,9 +130,83 @@ struct CYOutput {
 
 struct CYPropertyName {
     virtual void PropertyName(CYOutput &out) const = 0;
 
 struct CYPropertyName {
     virtual void PropertyName(CYOutput &out) const = 0;

+
+    virtual ~CYPropertyName() {
+    }
+};
+
+struct CYExpression;
+
+enum CYNeeded {
+    CYNever     = -1,
+    CYSometimes =  0,
+    CYAlways    =  1,
+};
+
+enum CYFlags {
+    CYNoFlags =      0,
+    CYNoBrace =      (1 << 0),
+    CYNoFunction =   (1 << 1),
+    CYNoIn =         (1 << 2),
+    CYNoCall =       (1 << 3),
+    CYNoRightHand =  (1 << 4),
+    CYNoDangle =     (1 << 5),
+    CYNoInteger =    (1 << 6),
+    CYNoBF =         (CYNoBrace | CYNoFunction),
+};
+
+struct CYStatement :
+    CYNext<CYStatement>
+{
+    virtual ~CYStatement() {
+    }
+
+    void Single(CYOutput &out, CYFlags flags) const;
+    void Multiple(CYOutput &out, CYFlags flags = CYNoFlags) const;
+
+    CYStatement *ReplaceAll(CYContext &context);
+    virtual CYStatement *Collapse(CYContext &context);
+
+    virtual CYStatement *Replace(CYContext &context) = 0;
+
+  private:
+    virtual void Output(CYOutput &out, CYFlags flags) const = 0;
+};
+
+struct CYStatements {
+    CYStatement *first_;
+    CYStatement *last_;
+
+    CYStatements() :
+        first_(NULL),
+        last_(NULL)
+    {
+    }
+
+    operator CYStatement *() const {
+        return first_;
+    }
+
+    CYStatements &operator ->*(CYStatement *next) {
+        if (next != NULL)
+            if (first_ == NULL) {
+                first_ = next;
+                last_ = next;
+            } else for (;; last_ = last_->next_)
+                if (last_->next_ == NULL) {
+                    last_->next_ = next;
+                    last_ = next;
+                    break;
+                }
+        return *this;
+    }

 };
 
 struct CYClassName {
 };
 
 struct CYClassName {

+    virtual ~CYClassName() {
+    }
+
+    virtual CYExpression *ClassName(CYContext &context, bool object) = 0;

     virtual void ClassName(CYOutput &out, bool object) const = 0;
 };
 
     virtual void ClassName(CYOutput &out, bool object) const = 0;
 };
 


@@ -114,89 +222,173 @@ struct CYWord :
     {
     }
 
     {
     }
 

-    const char *Value() const {
-        return word_;
+    void Set(const char *value) {
+        word_ = value;

     }
 
     }
 

+    virtual const char *Word() const;

     virtual void Output(CYOutput &out) const;
 
     virtual void Output(CYOutput &out) const;
 

+    virtual CYExpression *ClassName(CYContext &context, bool object);

     virtual void ClassName(CYOutput &out, bool object) const;
     virtual void PropertyName(CYOutput &out) const;
 };
 
 _finline std::ostream &operator <<(std::ostream &lhs, const CYWord &rhs) {
     virtual void ClassName(CYOutput &out, bool object) const;
     virtual void PropertyName(CYOutput &out) const;
 };
 
 _finline std::ostream &operator <<(std::ostream &lhs, const CYWord &rhs) {

-    return lhs << rhs.Value();
+    lhs << &rhs << '=';
+    return lhs << rhs.Word();

 }
 
 struct CYIdentifier :
 }
 
 struct CYIdentifier :

+    CYNext<CYIdentifier>,

     CYWord
 {
     CYWord
 {

+    CYIdentifier *replace_;
+    size_t offset_;
+    size_t usage_;
+

     CYIdentifier(const char *word) :
     CYIdentifier(const char *word) :

-        CYWord(word)
+        CYWord(word),
+        replace_(NULL),
+        offset_(0),
+        usage_(0)
+    {
+    }
+
+    virtual const char *Word() const;
+    CYIdentifier *Replace(CYContext &context);
+};
+
+struct CYComment :
+    CYStatement
+{
+    const char *value_;
+
+    CYComment(const char *value) :
+        value_(value)

     {
     }
     {
     }

+
+    virtual CYStatement *Replace(CYContext &context);
+    virtual void Output(CYOutput &out, CYFlags flags) const;

 };
 
 struct CYLabel :
 };
 
 struct CYLabel :

-    CYNext<CYLabel>
+    CYStatement

 {
     CYIdentifier *name_;
 {
     CYIdentifier *name_;

+    CYStatement *statement_;

 
 

-    CYLabel(CYIdentifier *name, CYLabel *next) :
-        CYNext<CYLabel>(next),
-        name_(name)
+    CYLabel(CYIdentifier *name, CYStatement *statement) :
+        name_(name),
+        statement_(statement)

     {
     }
     {
     }

-};

 
 

-enum CYNeeded {
-    CYNever     = -1,
-    CYSometimes =  0,
-    CYAlways    =  1,
+    virtual CYStatement *Replace(CYContext &context);
+    virtual void Output(CYOutput &out, CYFlags flags) const;

 };
 
 };
 

-enum CYFlags {
-    CYNoFlags =      0,
-    CYNoBrace =      (1 << 0),
-    CYNoFunction =   (1 << 1),
-    CYNoLeader =     (1 << 2),
-    CYNoTrailer =    (1 << 3),
-    CYNoIn =         (1 << 4),
-    CYNoHyphen =     (1 << 5),
-    CYNoCall =       (1 << 6),
-    CYNoRightHand =  (1 << 7),
-    CYNoDangle =     (1 << 8),
-    CYNoTerminator = (1 << 9),
-    CYNoBF =         (CYNoBrace | CYNoFunction),
+struct CYCStringLess :
+    std::binary_function<const char *, const char *, bool>
+{
+    _finline bool operator ()(const char *lhs, const char *rhs) const {
+        return strcmp(lhs, rhs) < 0;
+    }

 };
 
 };
 

-struct CYStatement :
-    CYNext<CYStatement>
+struct CYIdentifierValueLess :
+    std::binary_function<CYIdentifier *, CYIdentifier *, bool>

 {
 {

-    CYLabel *labels_;
+    _finline bool operator ()(CYIdentifier *lhs, CYIdentifier *rhs) const {
+        return CYCStringLess()(lhs->Word(), rhs->Word());
+    }
+};
+
+enum CYIdentifierFlags {
+    CYIdentifierArgument,
+    CYIdentifierVariable,
+    CYIdentifierOther,
+    CYIdentifierMagic,
+};
+
+typedef std::set<const char *, CYCStringLess> CYCStringSet;
+typedef std::set<CYIdentifier *, CYIdentifierValueLess> CYIdentifierValueSet;
+typedef std::map<CYIdentifier *, CYIdentifierFlags> CYIdentifierAddressFlagsMap;
+
+struct CYIdentifierUsage {
+    CYIdentifier *identifier_;
+    size_t usage_;
+};
+
+typedef std::vector<CYIdentifierUsage> CYIdentifierUsageVector;
+
+struct CYScope {
+    CYScope *parent_;

 
 

-    CYStatement() :
-        labels_(NULL)
+    CYIdentifierAddressFlagsMap internal_;
+    CYIdentifierValueSet identifiers_;
+
+    CYScope() :
+        parent_(NULL)

     {
     }
 
     {
     }
 

-    void AddLabel(CYIdentifier *identifier) {
-        labels_ = new CYLabel(identifier, labels_);
+    virtual ~CYScope() {

     }
 
     }
 

-    virtual bool IsBlock() const {
-        return next_ != NULL;
+    void Declare(CYContext &context, CYIdentifier *identifier, CYIdentifierFlags flags);
+    virtual CYIdentifier *Lookup(CYContext &context, CYIdentifier *identifier);
+    void Merge(CYContext &context, CYIdentifier *identifier);
+    void Scope(CYContext &context, CYStatement *&statements);
+};
+
+struct CYProgram :
+    CYThing
+{
+    CYStatement *statements_;
+
+    CYProgram(CYStatement *statements) :
+        statements_(statements)
+    {

     }
 
     }
 

-    virtual void Single(CYOutput &out, CYFlags flags) const;
-    virtual void Multiple(CYOutput &out, CYFlags flags = CYNoFlags) const;
+    virtual void Replace(CYContext &context);
+    virtual void Output(CYOutput &out) const;
+};

 
 

-  private:
-    virtual void Output(CYOutput &out, CYFlags flags) const = 0;
+struct CYContext {
+    apr_pool_t *pool_;
+    CYOptions &options_;
+    CYScope *scope_;
+    CYIdentifierUsageVector rename_;
+
+    CYContext(apr_pool_t *pool, CYOptions &options) :
+        pool_(pool),
+        options_(options),
+        scope_(NULL)
+    {
+    }
+
+    virtual ~CYContext() {
+    }
+
+    template <typename Type_>
+    void Replace(Type_ *&value) {
+        for (;;) if (value == NULL)
+            break;
+        else {
+            Type_ *replace(value->Replace(*this));
+            if (replace != value)
+                value = replace;
+            else break;
+        }
+    }

 };
 
 struct CYBlock :
 };
 
 struct CYBlock :

-    CYStatement
+    CYStatement,
+    CYThing

 {
     CYStatement *statements_;
 
 {
     CYStatement *statements_;
 


@@ -205,10 +397,21 @@ struct CYBlock :
     {
     }
 
     {
     }
 

-    virtual bool IsBlock() const {
-        return true;
+    operator CYStatement *() const {
+        return statements_;
+    }
+
+    void AddPrev(CYStatement *statement) {
+        CYStatement *last(statement);
+        while (last->next_ != NULL)
+            last = last->next_;
+        last->SetNext(statements_);
+        statements_ = statement;

     }
 
     }
 

+    virtual CYStatement *Replace(CYContext &context);
+
+    virtual void Output(CYOutput &out) const;

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -232,8 +435,9 @@ class CYDriver {
     bool strict_;
 
     enum Condition {
     bool strict_;
 
     enum Condition {

-        RegExStart,
-        RegExRest
+        RegExpCondition,
+        XMLContentCondition,
+        XMLTagCondition,

     };
 
     std::string filename_;
     };
 
     std::string filename_;


@@ -246,7 +450,7 @@ class CYDriver {
 
     typedef std::vector<Error> Errors;
 
 
     typedef std::vector<Error> Errors;
 

-    CYStatement *program_;
+    CYProgram *program_;

     Errors errors_;
 
   private:
     Errors errors_;
 
   private:


@@ -257,26 +461,42 @@ class CYDriver {
     CYDriver(const std::string &filename);
     ~CYDriver();
 
     CYDriver(const std::string &filename);
     ~CYDriver();
 

+    Condition GetCondition();

     void SetCondition(Condition condition);
 
     void SetCondition(Condition condition);
 

+    void PushCondition(Condition condition);
+    void PopCondition();
+

     void Warning(const cy::location &location, const char *message);
 };
 
 struct CYForInitialiser {
     void Warning(const cy::location &location, const char *message);
 };
 
 struct CYForInitialiser {

+    virtual ~CYForInitialiser() {
+    }
+

     virtual void For(CYOutput &out) const = 0;
     virtual void For(CYOutput &out) const = 0;

+    virtual CYExpression *Replace(CYContext &context) = 0;

 };
 
 struct CYForInInitialiser {
 };
 
 struct CYForInInitialiser {

+    virtual ~CYForInInitialiser() {
+    }
+

     virtual void ForIn(CYOutput &out, CYFlags flags) const = 0;
     virtual const char *ForEachIn() const = 0;
     virtual void ForIn(CYOutput &out, CYFlags flags) const = 0;
     virtual const char *ForEachIn() const = 0;

-    virtual void ForEachIn(CYOutput &out) const = 0;
+    virtual CYExpression *ForEachIn(CYContext &out) = 0;
+    virtual CYExpression *Replace(CYContext &context) = 0;

 };
 
 };
 

+struct CYNumber;
+struct CYString;
+

 struct CYExpression :
     CYNext<CYExpression>,
     CYForInitialiser,
     CYForInInitialiser,
 struct CYExpression :
     CYNext<CYExpression>,
     CYForInitialiser,
     CYForInInitialiser,

-    CYClassName
+    CYClassName,
+    CYThing

 {
     virtual unsigned Precedence() const = 0;
 
 {
     virtual unsigned Precedence() const = 0;
 


@@ -288,13 +508,31 @@ struct CYExpression :
     virtual void ForIn(CYOutput &out, CYFlags flags) const;
 
     virtual const char *ForEachIn() const;
     virtual void ForIn(CYOutput &out, CYFlags flags) const;
 
     virtual const char *ForEachIn() const;

-    virtual void ForEachIn(CYOutput &out) const;
+    virtual CYExpression *ForEachIn(CYContext &out);

 
 

+    virtual void Output(CYOutput &out) const;

     virtual void Output(CYOutput &out, CYFlags flags) const = 0;
     void Output(CYOutput &out, unsigned precedence, CYFlags flags) const;
 
     virtual void Output(CYOutput &out, CYFlags flags) const = 0;
     void Output(CYOutput &out, unsigned precedence, CYFlags flags) const;
 

+    virtual CYExpression *ClassName(CYContext &context, bool object);

     virtual void ClassName(CYOutput &out, bool object) const;
 
     virtual void ClassName(CYOutput &out, bool object) const;
 

+    CYExpression *ReplaceAll(CYContext &context);
+
+    virtual CYExpression *Replace(CYContext &context) = 0;
+
+    virtual CYExpression *Primitive(CYContext &context) {
+        return this;
+    }
+
+    virtual CYNumber *Number(CYContext &context) {
+        return NULL;
+    }
+
+    virtual CYString *String(CYContext &context) {
+        return NULL;
+    }
+

     virtual const char *Word() const {
         return NULL;
     }
     virtual const char *Word() const {
         return NULL;
     }


@@ -320,7 +558,7 @@ struct CYCompound :
 {
     CYExpression *expressions_;
 
 {
     CYExpression *expressions_;
 

-    CYCompound(CYExpression *expressions) :
+    CYCompound(CYExpression *expressions = NULL) :

         expressions_(expressions)
     {
     }
         expressions_(expressions)
     {
     }


@@ -335,19 +573,36 @@ struct CYCompound :
 
     CYPrecedence(17)
 
 
     CYPrecedence(17)
 

+    virtual CYExpression *Replace(CYContext &context);

     void Output(CYOutput &out, CYFlags flags) const;
 };
 
     void Output(CYOutput &out, CYFlags flags) const;
 };
 

+struct CYFunctionParameter :
+    CYNext<CYFunctionParameter>,
+    CYThing
+{
+    CYIdentifier *name_;
+
+    CYFunctionParameter(CYIdentifier *name, CYFunctionParameter *next = NULL) :
+        CYNext<CYFunctionParameter>(next),
+        name_(name)
+    {
+    }
+
+    void Replace(CYContext &context);
+    virtual void Output(CYOutput &out) const;
+};
+

 struct CYComprehension :
 struct CYComprehension :

-    CYNext<CYComprehension>
+    CYNext<CYComprehension>,
+    CYThing

 {
 {

-    void Output(CYOutput &out) const;

     virtual const char *Name() const = 0;
 
     virtual const char *Name() const = 0;
 

-    virtual void Begin_(CYOutput &out) const = 0;
-
-    virtual void End_(CYOutput &out) const {
-    }
+    virtual CYFunctionParameter *Parameter(CYContext &context) const = 0;
+    CYFunctionParameter *Parameters(CYContext &context) const;
+    virtual CYStatement *Replace(CYContext &context, CYStatement *statement) const;
+    virtual void Output(CYOutput &out) const = 0;

 };
 
 struct CYForInComprehension :
 };
 
 struct CYForInComprehension :


@@ -363,10 +618,12 @@ struct CYForInComprehension :
     }
 
     virtual const char *Name() const {
     }
 
     virtual const char *Name() const {

-        return name_->Value();
+        return name_->Word();

     }
 
     }
 

-    virtual void Begin_(CYOutput &out) const;
+    virtual CYFunctionParameter *Parameter(CYContext &context) const;
+    virtual CYStatement *Replace(CYContext &context, CYStatement *statement) const;
+    virtual void Output(CYOutput &out) const;

 };
 
 struct CYForEachInComprehension :
 };
 
 struct CYForEachInComprehension :


@@ -382,11 +639,12 @@ struct CYForEachInComprehension :
     }
 
     virtual const char *Name() const {
     }
 
     virtual const char *Name() const {

-        return name_->Value();
+        return name_->Word();

     }
 
     }
 

-    virtual void Begin_(CYOutput &out) const;
-    virtual void End_(CYOutput &out) const;
+    virtual CYFunctionParameter *Parameter(CYContext &context) const;
+    virtual CYStatement *Replace(CYContext &context, CYStatement *statement) const;
+    virtual void Output(CYOutput &out) const;

 };
 
 struct CYIfComprehension :
 };
 
 struct CYIfComprehension :


@@ -403,7 +661,9 @@ struct CYIfComprehension :
         return NULL;
     }
 
         return NULL;
     }
 

-    virtual void Begin_(CYOutput &out) const;
+    virtual CYFunctionParameter *Parameter(CYContext &context) const;
+    virtual CYStatement *Replace(CYContext &context, CYStatement *statement) const;
+    virtual void Output(CYOutput &out) const;

 };
 
 struct CYArrayComprehension :
 };
 
 struct CYArrayComprehension :


@@ -420,6 +680,7 @@ struct CYArrayComprehension :
 
     CYPrecedence(0)
 
 
     CYPrecedence(0)
 

+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -430,6 +691,12 @@ struct CYLiteral :
     CYRightHand(false)
 };
 
     CYRightHand(false)
 };
 

+struct CYTrivial :
+    CYLiteral
+{
+    virtual CYExpression *Replace(CYContext &context);
+};
+

 struct CYMagic :
     CYExpression
 {
 struct CYMagic :
     CYExpression
 {


@@ -437,37 +704,6 @@ struct CYMagic :
     CYRightHand(false)
 };
 
     CYRightHand(false)
 };
 

-struct CYSelectorPart :
-    CYNext<CYSelectorPart>
-{
-    CYWord *name_;
-    bool value_;
-
-    CYSelectorPart(CYWord *name, bool value, CYSelectorPart *next) :
-        CYNext<CYSelectorPart>(next),
-        name_(name),
-        value_(value)
-    {
-    }
-
-    virtual void Output(CYOutput &out) const;
-};
-
-struct CYSelector :
-    CYLiteral
-{
-    CYSelectorPart *name_;
-
-    CYSelector(CYSelectorPart *name) :
-        name_(name)
-    {
-    }
-
-    CYPrecedence(1)
-
-    virtual void Output(CYOutput &out, CYFlags flags) const;
-};
-

 struct CYRange {
     uint64_t lo_;
     uint64_t hi_;
 struct CYRange {
     uint64_t lo_;
     uint64_t hi_;


@@ -493,20 +729,32 @@ extern CYRange WordStartRange_;
 extern CYRange WordEndRange_;
 
 struct CYString :
 extern CYRange WordEndRange_;
 
 struct CYString :

-    CYLiteral,
+    CYTrivial,

     CYPropertyName
 {
     const char *value_;
     size_t size_;
 
     CYPropertyName
 {
     const char *value_;
     size_t size_;
 

+    CYString() :
+        value_(NULL),
+        size_(0)
+    {
+    }
+
+    CYString(const char *value) :
+        value_(value),
+        size_(strlen(value))
+    {
+    }
+

     CYString(const char *value, size_t size) :
         value_(value),
         size_(size)
     {
     }
 
     CYString(const char *value, size_t size) :
         value_(value),
         size_(size)
     {
     }
 

-    CYString(const CYIdentifier *identifier) :
-        value_(identifier->Value()),
+    CYString(const CYWord *word) :
+        value_(word->Word()),

         size_(strlen(value_))
     {
     }
         size_(strlen(value_))
     {
     }


@@ -515,21 +763,18 @@ struct CYString :
         return value_;
     }
 
         return value_;
     }
 

-    virtual const char *Word() const {
-        if (size_ == 0 || !WordStartRange_[value_[0]])
-            return NULL;
-        for (size_t i(1); i != size_; ++i)
-            if (!WordEndRange_[value_[i]])
-                return NULL;
-        return Value();
-    }
+    virtual const char *Word() const;
+
+    virtual CYNumber *Number(CYContext &context);
+    virtual CYString *String(CYContext &context);

 
 

+    CYString *Concat(CYContext &out, CYString *rhs) const;

     virtual void Output(CYOutput &out, CYFlags flags) const;
     virtual void PropertyName(CYOutput &out) const;
 };
 
 struct CYNumber :
     virtual void Output(CYOutput &out, CYFlags flags) const;
     virtual void PropertyName(CYOutput &out) const;
 };
 
 struct CYNumber :

-    CYLiteral,
+    CYTrivial,

     CYPropertyName
 {
     double value_;
     CYPropertyName
 {
     double value_;


@@ -543,12 +788,15 @@ struct CYNumber :
         return value_;
     }
 
         return value_;
     }
 

+    virtual CYNumber *Number(CYContext &context);
+    virtual CYString *String(CYContext &context);
+

     virtual void Output(CYOutput &out, CYFlags flags) const;
     virtual void PropertyName(CYOutput &out) const;
 };
 
 struct CYRegEx :
     virtual void Output(CYOutput &out, CYFlags flags) const;
     virtual void PropertyName(CYOutput &out) const;
 };
 
 struct CYRegEx :

-    CYLiteral
+    CYTrivial

 {
     const char *value_;
 
 {
     const char *value_;
 


@@ -566,13 +814,16 @@ struct CYRegEx :
 
 struct CYNull :
     CYWord,
 
 struct CYNull :
     CYWord,

-    CYLiteral
+    CYTrivial

 {
     CYNull() :
         CYWord("null")
     {
     }
 
 {
     CYNull() :
         CYWord("null")
     {
     }
 

+    virtual CYNumber *Number(CYContext &context);
+    virtual CYString *String(CYContext &context);
+

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -585,11 +836,12 @@ struct CYThis :
     {
     }
 
     {
     }
 

+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYBoolean :
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYBoolean :

-    CYLiteral
+    CYTrivial

 {
     virtual bool Value() const = 0;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 {
     virtual bool Value() const = 0;
     virtual void Output(CYOutput &out, CYFlags flags) const;


@@ -604,7 +856,12 @@ struct CYFalse :
     {
     }
 
     {
     }
 

-    virtual bool Value() const;
+    virtual bool Value() const {
+        return false;
+    }
+
+    virtual CYNumber *Number(CYContext &context);
+    virtual CYString *String(CYContext &context);

 };
 
 struct CYTrue :
 };
 
 struct CYTrue :


@@ -616,7 +873,12 @@ struct CYTrue :
     {
     }
 
     {
     }
 

-    virtual bool Value() const;
+    virtual bool Value() const {
+        return true;
+    }
+
+    virtual CYNumber *Number(CYContext &context);
+    virtual CYString *String(CYContext &context);

 };
 
 struct CYVariable :
 };
 
 struct CYVariable :


@@ -632,6 +894,7 @@ struct CYVariable :
     CYPrecedence(0)
     CYRightHand(false)
 
     CYPrecedence(0)
     CYRightHand(false)
 

+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -648,6 +911,9 @@ struct CYPrefix :
     virtual bool Alphabetic() const = 0;
     virtual const char *Operator() const = 0;
 
     virtual bool Alphabetic() const = 0;
     virtual const char *Operator() const = 0;
 

+    CYPrecedence(4)
+
+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -670,6 +936,7 @@ struct CYInfix :
     virtual bool Alphabetic() const = 0;
     virtual const char *Operator() const = 0;
 
     virtual bool Alphabetic() const = 0;
     virtual const char *Operator() const = 0;
 

+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -685,6 +952,9 @@ struct CYPostfix :
 
     virtual const char *Operator() const = 0;
 
 
     virtual const char *Operator() const = 0;
 

+    CYPrecedence(3)
+
+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -706,15 +976,26 @@ struct CYAssignment :
 
     virtual const char *Operator() const = 0;
 
 
     virtual const char *Operator() const = 0;
 

+    CYPrecedence(16)
+
+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYArgument :
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYArgument :

-    CYNext<CYArgument>
+    CYNext<CYArgument>,
+    CYThing

 {
     CYWord *name_;
     CYExpression *value_;
 
 {
     CYWord *name_;
     CYExpression *value_;
 

+    CYArgument(CYExpression *value, CYArgument *next = NULL) :
+        CYNext<CYArgument>(next),
+        name_(NULL),
+        value_(value)
+    {
+    }
+

     CYArgument(CYWord *name, CYExpression *value, CYArgument *next = NULL) :
         CYNext<CYArgument>(next),
         name_(name),
     CYArgument(CYWord *name, CYExpression *value, CYArgument *next = NULL) :
         CYNext<CYArgument>(next),
         name_(name),


@@ -722,6 +1003,7 @@ struct CYArgument :
     {
     }
 
     {
     }
 

+    void Replace(CYContext &context);

     void Output(CYOutput &out) const;
 };
 
     void Output(CYOutput &out) const;
 };
 


@@ -739,19 +1021,21 @@ struct CYClause :
     CYNext<CYClause>
 {
     CYExpression *case_;
     CYNext<CYClause>
 {
     CYExpression *case_;

-    CYStatement *code_;
+    CYStatement *statements_;

 
 

-    CYClause(CYExpression *_case, CYStatement *code) :
+    CYClause(CYExpression *_case, CYStatement *statements) :

         case_(_case),
         case_(_case),

-        code_(code)
+        statements_(statements)

     {
     }
 
     {
     }
 

+    void Replace(CYContext &context);

     virtual void Output(CYOutput &out) const;
 };
 
 struct CYElement :
     virtual void Output(CYOutput &out) const;
 };
 
 struct CYElement :

-    CYNext<CYElement>
+    CYNext<CYElement>,
+    CYThing

 {
     CYExpression *value_;
 
 {
     CYExpression *value_;
 


@@ -761,6 +1045,7 @@ struct CYElement :
     {
     }
 
     {
     }
 

+    void Replace(CYContext &context);

     void Output(CYOutput &out) const;
 };
 
     void Output(CYOutput &out) const;
 };
 


@@ -769,21 +1054,40 @@ struct CYArray :
 {
     CYElement *elements_;
 
 {
     CYElement *elements_;
 

-    CYArray(CYElement *elements) :
+    CYArray(CYElement *elements = NULL) :

         elements_(elements)
     {
     }
 
         elements_(elements)
     {
     }
 

+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 

+struct CYProperty :
+    CYNext<CYProperty>,
+    CYThing
+{
+    CYPropertyName *name_;
+    CYExpression *value_;
+
+    CYProperty(CYPropertyName *name, CYExpression *value, CYProperty *next = NULL) :
+        CYNext<CYProperty>(next),
+        name_(name),
+        value_(value)
+    {
+    }
+
+    void Replace(CYContext &context);
+    virtual void Output(CYOutput &out) const;
+};
+

 struct CYDeclaration :
     CYForInInitialiser
 {
     CYIdentifier *identifier_;
     CYExpression *initialiser_;
 
 struct CYDeclaration :
     CYForInInitialiser
 {
     CYIdentifier *identifier_;
     CYExpression *initialiser_;
 

-    CYDeclaration(CYIdentifier *identifier, CYExpression *initialiser) :
+    CYDeclaration(CYIdentifier *identifier, CYExpression *initialiser = NULL) :

         identifier_(identifier),
         initialiser_(initialiser)
     {
         identifier_(identifier),
         initialiser_(initialiser)
     {


@@ -792,24 +1096,33 @@ struct CYDeclaration :
     virtual void ForIn(CYOutput &out, CYFlags flags) const;
 
     virtual const char *ForEachIn() const;
     virtual void ForIn(CYOutput &out, CYFlags flags) const;
 
     virtual const char *ForEachIn() const;

-    virtual void ForEachIn(CYOutput &out) const;
+    virtual CYExpression *ForEachIn(CYContext &out);
+
+    virtual CYExpression *Replace(CYContext &context);
+    virtual CYAssignment *Assignment(CYContext &context);

 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYDeclarations :
     CYNext<CYDeclarations>,
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYDeclarations :
     CYNext<CYDeclarations>,

+    CYThing,

     CYForInitialiser
 {
     CYDeclaration *declaration_;
 
     CYForInitialiser
 {
     CYDeclaration *declaration_;
 

-    CYDeclarations(CYDeclaration *declaration, CYDeclarations *next) :
+    CYDeclarations(CYDeclaration *declaration, CYDeclarations *next = NULL) :

         CYNext<CYDeclarations>(next),
         declaration_(declaration)
     {
     }
 
     virtual void For(CYOutput &out) const;
         CYNext<CYDeclarations>(next),
         declaration_(declaration)
     {
     }
 
     virtual void For(CYOutput &out) const;

+
+    virtual CYCompound *Replace(CYContext &context);
+    CYProperty *Property(CYContext &context);
+
+    virtual void Output(CYOutput &out) const;

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -823,6 +1136,7 @@ struct CYVar :
     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -830,130 +1144,18 @@ struct CYLet :
     CYStatement
 {
     CYDeclarations *declarations_;
     CYStatement
 {
     CYDeclarations *declarations_;

-    CYStatement *statements_;
+    CYBlock code_;

 
     CYLet(CYDeclarations *declarations, CYStatement *statements) :
         declarations_(declarations),
 
     CYLet(CYDeclarations *declarations, CYStatement *statements) :
         declarations_(declarations),

-        statements_(statements)
-    {
-    }
-
-    virtual void Output(CYOutput &out, CYFlags flags) const;
-};
-
-struct CYField :
-    CYNext<CYField>
-{
-    virtual void Output(CYOutput &out) const;
-};
-
-struct CYMessageParameter :
-    CYNext<CYMessageParameter>
-{
-    CYWord *tag_;
-    CYExpression *type_;
-    CYIdentifier *name_;
-
-    CYMessageParameter(CYWord *tag, CYExpression *type, CYIdentifier *name) :
-        tag_(tag),
-        type_(type),
-        name_(name)
-    {
-    }
-};
-
-struct CYMessage :
-    CYNext<CYMessage>
-{
-    bool instance_;
-    CYExpression *type_;
-    CYMessageParameter *parameter_;
-    CYStatement *body_;
-
-    CYMessage(bool instance, CYExpression *type, CYMessageParameter *parameter, CYStatement *body) :
-        instance_(instance),
-        type_(type),
-        parameter_(parameter),
-        body_(body)
-    {
-    }
-
-    virtual void Output(CYOutput &out, bool replace) const;
-};
-
-struct CYClass {
-    CYClassName *name_;
-    CYExpression *super_;
-    CYField *fields_;
-    CYMessage *messages_;
-
-    CYClass(CYClassName *name, CYExpression *super, CYField *fields, CYMessage *messages) :
-        name_(name),
-        super_(super),
-        fields_(fields),
-        messages_(messages)
-    {
-    }
-
-    virtual void Output(CYOutput &out, CYFlags flags) const;
-};
-
-struct CYClassExpression :
-    CYClass,
-    CYExpression
-{
-    CYClassExpression(CYClassName *name, CYExpression *super, CYField *fields, CYMessage *messages) :
-        CYClass(name, super, fields, messages)
+        code_(statements)

     {
     }
 
     {
     }
 

-    CYPrecedence(0)
-
+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 

-struct CYClassStatement :
-    CYClass,
-    CYStatement
-{
-    CYClassStatement(CYClassName *name, CYExpression *super, CYField *fields, CYMessage *messages) :
-        CYClass(name, super, fields, messages)
-    {
-    }
-
-    virtual void Output(CYOutput &out, CYFlags flags) const;
-};
-
-struct CYCategory :
-    CYStatement
-{
-    CYClassName *name_;
-    CYMessage *messages_;
-
-    CYCategory(CYClassName *name, CYMessage *messages) :
-        name_(name),
-        messages_(messages)
-    {
-    }
-
-    virtual void Output(CYOutput &out, CYFlags flags) const;
-};
-
-struct CYFunctionParameter :
-    CYNext<CYFunctionParameter>,
-    CYThing
-{
-    CYIdentifier *name_;
-
-    CYFunctionParameter(CYIdentifier *name, CYFunctionParameter *next) :
-        CYNext<CYFunctionParameter>(next),
-        name_(name)
-    {
-    }
-
-    virtual void Output(CYOutput &out) const;
-};
-

 struct CYFor :
     CYStatement
 {
 struct CYFor :
     CYStatement
 {


@@ -970,6 +1172,7 @@ struct CYFor :
     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -987,6 +1190,7 @@ struct CYForIn :
     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1004,70 +1208,24 @@ struct CYForEachIn :
     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 

-struct CYProperty :
-    CYNext<CYProperty>
-{
-    CYPropertyName *name_;
-    CYExpression *value_;
-
-    CYProperty(CYPropertyName *name, CYExpression *value, CYProperty *next) :
-        CYNext<CYProperty>(next),
-        name_(name),
-        value_(value)
-    {
-    }
-
-    virtual void Output(CYOutput &out) const;
-};
-

 struct CYObject :
     CYLiteral
 {
 struct CYObject :
     CYLiteral
 {

-    CYProperty *property_;
+    CYProperty *properties_;

 
 

-    CYObject(CYProperty *property) :
-        property_(property)
+    CYObject(CYProperty *properties) :
+        properties_(properties)

     {
     }
 
     {
     }
 

+    virtual CYExpression *Replace(CYContext &context);

     void Output(CYOutput &out, CYFlags flags) const;
 };
 
     void Output(CYOutput &out, CYFlags flags) const;
 };
 

-struct CYCatch :
-    CYThing
-{
-    CYIdentifier *name_;
-    CYStatement *code_;
-
-    CYCatch(CYIdentifier *name, CYStatement *code) :
-        name_(name),
-        code_(code)
-    {
-    }
-
-    virtual void Output(CYOutput &out) const;
-};
-
-struct CYSend :
-    CYExpression
-{
-    CYExpression *self_;
-    CYArgument *arguments_;
-
-    CYSend(CYExpression *self, CYArgument *arguments) :
-        self_(self),
-        arguments_(arguments)
-    {
-    }
-
-    CYPrecedence(0)
-
-    virtual void Output(CYOutput &out, CYFlags flags) const;
-};
-

 struct CYMember :
     CYExpression
 {
 struct CYMember :
     CYExpression
 {


@@ -1083,6 +1241,8 @@ struct CYMember :
     void SetLeft(CYExpression *object) {
         object_ = object;
     }
     void SetLeft(CYExpression *object) {
         object_ = object;
     }

+
+    void Replace_(CYContext &context);

 };
 
 struct CYDirectMember :
 };
 
 struct CYDirectMember :


@@ -1096,6 +1256,7 @@ struct CYDirectMember :
     CYPrecedence(1)
     CYRightHand(false)
 
     CYPrecedence(1)
     CYRightHand(false)
 

+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1110,6 +1271,7 @@ struct CYIndirectMember :
     CYPrecedence(1)
     CYRightHand(false)
 
     CYPrecedence(1)
     CYRightHand(false)
 

+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1131,6 +1293,7 @@ struct CYNew :
 
     CYRightHand(false)
 
 
     CYRightHand(false)
 

+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1140,7 +1303,7 @@ struct CYCall :
     CYExpression *function_;
     CYArgument *arguments_;
 
     CYExpression *function_;
     CYArgument *arguments_;
 

-    CYCall(CYExpression *function, CYArgument *arguments) :
+    CYCall(CYExpression *function, CYArgument *arguments = NULL) :

         function_(function),
         arguments_(arguments)
     {
         function_(function),
         arguments_(arguments)
     {


@@ -1149,6 +1312,7 @@ struct CYCall :
     CYPrecedence(1)
     CYRightHand(false)
 
     CYPrecedence(1)
     CYRightHand(false)
 

+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1159,13 +1323,14 @@ struct CYIf :
     CYStatement *true_;
     CYStatement *false_;
 
     CYStatement *true_;
     CYStatement *false_;
 

-    CYIf(CYExpression *test, CYStatement *_true, CYStatement *_false) :
+    CYIf(CYExpression *test, CYStatement *_true, CYStatement *_false = NULL) :

         test_(test),
         true_(_true),
         false_(_false)
     {
     }
 
         test_(test),
         true_(_true),
         false_(_false)
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1181,6 +1346,7 @@ struct CYDoWhile :
     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1196,21 +1362,27 @@ struct CYWhile :
     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYFunction {
     CYIdentifier *name_;
     CYFunctionParameter *parameters_;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYFunction {
     CYIdentifier *name_;
     CYFunctionParameter *parameters_;

-    CYStatement *body_;
+    CYBlock code_;

 
 

-    CYFunction(CYIdentifier *name, CYFunctionParameter *parameters, CYStatement *body) :
+    CYFunction(CYIdentifier *name, CYFunctionParameter *parameters, CYStatement *statements) :

         name_(name),
         parameters_(parameters),
         name_(name),
         parameters_(parameters),

-        body_(body)
+        code_(statements)

     {
     }
 
     {
     }
 

+    virtual ~CYFunction() {
+    }
+
+    void Inject(CYContext &context);
+    virtual void Replace_(CYContext &context, bool outer);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1218,14 +1390,15 @@ struct CYFunctionExpression :
     CYFunction,
     CYExpression
 {
     CYFunction,
     CYExpression
 {

-    CYFunctionExpression(CYIdentifier *name, CYFunctionParameter *parameters, CYStatement *body) :
-        CYFunction(name, parameters, body)
+    CYFunctionExpression(CYIdentifier *name, CYFunctionParameter *parameters, CYStatement *statements) :
+        CYFunction(name, parameters, statements)

     {
     }
 
     CYPrecedence(0)
     CYRightHand(false)
 
     {
     }
 
     CYPrecedence(0)
     CYRightHand(false)
 

+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1233,11 +1406,12 @@ struct CYFunctionStatement :
     CYFunction,
     CYStatement
 {
     CYFunction,
     CYStatement
 {

-    CYFunctionStatement(CYIdentifier *name, CYFunctionParameter *parameters, CYStatement *body) :
-        CYFunction(name, parameters, body)
+    CYFunctionStatement(CYIdentifier *name, CYFunctionParameter *parameters, CYStatement *statements) :
+        CYFunction(name, parameters, statements)

     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1249,8 +1423,12 @@ struct CYExpress :
     CYExpress(CYExpression *expression) :
         expression_(expression)
     {
     CYExpress(CYExpression *expression) :
         expression_(expression)
     {

+        if (expression == NULL)
+            throw;

     }
 
     }
 

+    virtual CYStatement *Collapse(CYContext &context);
+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1264,6 +1442,7 @@ struct CYContinue :
     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1277,6 +1456,7 @@ struct CYBreak :
     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1290,56 +1470,85 @@ struct CYReturn :
     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYEmpty :
     CYStatement
 {
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYEmpty :
     CYStatement
 {

+    virtual CYStatement *Collapse(CYContext &context);
+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 

-struct CYFinally {
-    CYStatement *code_;
+struct CYFinally :
+    CYThing
+{
+    CYBlock code_;

 
 

-    CYFinally(CYStatement *code) :
-        code_(code)
+    CYFinally(CYStatement *statements) :
+        code_(statements)
+    {
+    }
+
+    void Replace(CYContext &context);
+    virtual void Output(CYOutput &out) const;
+};
+
+namespace cy {
+namespace Syntax {
+
+struct Catch :
+    CYThing
+{
+    CYIdentifier *name_;
+    CYBlock code_;
+
+    Catch(CYIdentifier *name, CYStatement *statements) :
+        name_(name),
+        code_(statements)

     {
     }
 
     {
     }
 

+    void Replace(CYContext &context);

     virtual void Output(CYOutput &out) const;
 };
 
     virtual void Output(CYOutput &out) const;
 };
 

-struct CYTry :
+struct Try :

     CYStatement
 {
     CYStatement
 {

-    CYStatement *code_;
-    CYCatch *catch_;
+    CYBlock code_;
+    Catch *catch_;

     CYFinally *finally_;
 
     CYFinally *finally_;
 

-    CYTry(CYStatement *code, CYCatch *_catch, CYFinally *finally) :
-        code_(code),
+    Try(CYStatement *statements, Catch *_catch, CYFinally *finally) :
+        code_(statements),

         catch_(_catch),
         finally_(finally)
     {
     }
 
         catch_(_catch),
         finally_(finally)
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 

-struct CYThrow :
+struct Throw :

     CYStatement
 {
     CYExpression *value_;
 
     CYStatement
 {
     CYExpression *value_;
 

-    CYThrow(CYExpression *value) :
+    Throw(CYExpression *value) :

         value_(value)
     {
     }
 
         value_(value)
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 

+} }
+

 struct CYWith :
     CYStatement
 {
 struct CYWith :
     CYStatement
 {


@@ -1352,6 +1561,7 @@ struct CYWith :
     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1367,6 +1577,7 @@ struct CYSwitch :
     {
     }
 
     {
     }
 

+    virtual CYStatement *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1386,6 +1597,7 @@ struct CYCondition :
 
     CYPrecedence(15)
 
 
     CYPrecedence(15)
 

+    virtual CYExpression *Replace(CYContext &context);

     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 


@@ -1402,9 +1614,8 @@ struct CYAddressOf :
     }
 
     CYAlphabetic(false)
     }
 
     CYAlphabetic(false)

-    CYPrecedence(2)

 
 

-    virtual void Output(CYOutput &out, CYFlags flags) const;
+    virtual CYExpression *Replace(CYContext &context);

 };
 
 struct CYIndirect :
 };
 
 struct CYIndirect :


@@ -1420,48 +1631,47 @@ struct CYIndirect :
     }
 
     CYAlphabetic(false)
     }
 
     CYAlphabetic(false)

-    CYPrecedence(1)

 
 

-    virtual void Output(CYOutput &out, CYFlags flags) const;
+    virtual CYExpression *Replace(CYContext &context);

 };
 
 };
 

-#define CYPostfix_(op, name) \
+#define CYReplace \
+    virtual CYExpression *Replace(CYContext &context);
+
+#define CYPostfix_(op, name, args...) \

     struct CY ## name : \
         CYPostfix \
     struct CY ## name : \
         CYPostfix \

-    { \
+    { args \

         CY ## name(CYExpression *lhs) : \
             CYPostfix(lhs) \
         { \
         } \
         CY ## name(CYExpression *lhs) : \
             CYPostfix(lhs) \
         { \
         } \

-    \
-        CYPrecedence(3) \

     \
         virtual const char *Operator() const { \
             return op; \
         } \
     };
 
     \
         virtual const char *Operator() const { \
             return op; \
         } \
     };
 

-#define CYPrefix_(alphabetic, op, name) \
+#define CYPrefix_(alphabetic, op, name, args...) \

     struct CY ## name : \
         CYPrefix \
     struct CY ## name : \
         CYPrefix \

-    { \
+    { args \

         CY ## name(CYExpression *rhs) : \
             CYPrefix(rhs) \
         { \
         } \
     \
         CYAlphabetic(alphabetic) \
         CY ## name(CYExpression *rhs) : \
             CYPrefix(rhs) \
         { \
         } \
     \
         CYAlphabetic(alphabetic) \

-        CYPrecedence(4) \

     \
         virtual const char *Operator() const { \
             return op; \
         } \
     };
 
     \
         virtual const char *Operator() const { \
             return op; \
         } \
     };
 

-#define CYInfix_(alphabetic, precedence, op, name) \
+#define CYInfix_(alphabetic, precedence, op, name, args...) \

     struct CY ## name : \
         CYInfix \
     struct CY ## name : \
         CYInfix \

-    { \
+    { args \

         CY ## name(CYExpression *lhs, CYExpression *rhs) : \
             CYInfix(lhs, rhs) \
         { \
         CY ## name(CYExpression *lhs, CYExpression *rhs) : \
             CYInfix(lhs, rhs) \
         { \


@@ -1475,16 +1685,14 @@ struct CYIndirect :
         } \
     };
 
         } \
     };
 

-#define CYAssignment_(op, name) \
+#define CYAssignment_(op, name, args...) \

     struct CY ## name ## Assign : \
         CYAssignment \
     struct CY ## name ## Assign : \
         CYAssignment \

-    { \
+    { args \

         CY ## name ## Assign(CYExpression *lhs, CYExpression *rhs) : \
             CYAssignment(lhs, rhs) \
         { \
         } \
         CY ## name ## Assign(CYExpression *lhs, CYExpression *rhs) : \
             CYAssignment(lhs, rhs) \
         { \
         } \

-    \
-        CYPrecedence(16) \

     \
         virtual const char *Operator() const { \
             return op; \
     \
         virtual const char *Operator() const { \
             return op; \


@@ -1499,6 +1707,7 @@ CYPrefix_(true, "void", Void)
 CYPrefix_(true, "typeof", TypeOf)
 CYPrefix_(false, "++", PreIncrement)
 CYPrefix_(false, "--", PreDecrement)
 CYPrefix_(true, "typeof", TypeOf)
 CYPrefix_(false, "++", PreIncrement)
 CYPrefix_(false, "--", PreDecrement)

+CYPrefix_(false, "+", Affirm)

 CYPrefix_(false, "-", Negate)
 CYPrefix_(false, "~", BitwiseNot)
 CYPrefix_(false, "!", LogicalNot)
 CYPrefix_(false, "-", Negate)
 CYPrefix_(false, "~", BitwiseNot)
 CYPrefix_(false, "!", LogicalNot)


@@ -1506,7 +1715,7 @@ CYPrefix_(false, "!", LogicalNot)
 CYInfix_(false, 5, "*", Multiply)
 CYInfix_(false, 5, "/", Divide)
 CYInfix_(false, 5, "%", Modulus)
 CYInfix_(false, 5, "*", Multiply)
 CYInfix_(false, 5, "/", Divide)
 CYInfix_(false, 5, "%", Modulus)

-CYInfix_(false, 6, "+", Add)
+CYInfix_(false, 6, "+", Add, CYReplace)

 CYInfix_(false, 6, "-", Subtract)
 CYInfix_(false, 7, "<<", ShiftLeft)
 CYInfix_(false, 7, ">>", ShiftRightSigned)
 CYInfix_(false, 6, "-", Subtract)
 CYInfix_(false, 7, "<<", ShiftLeft)
 CYInfix_(false, 7, ">>", ShiftRightSigned)