Avoid token precedence as Ruby blocks requirement.

[cycript.git] / Syntax.hpp

diff --git a/Syntax.hpp b/Syntax.hpp
index e3999e3c63e2037e3a272edefd3a622fa7037390..f11c2f29b8632c5363e28d176ed3d358492aa2ca 100644 (file)
--- a/Syntax.hpp
+++ b/Syntax.hpp
@@ -28,8 +28,6 @@
 #include <streambuf>
 #include <string>
 #include <vector>
-#include <map>
-#include <set>
 
 #include "List.hpp"
 #include "Location.hpp"
@@ -78,15 +76,15 @@ struct CYOutput {
         _assert(out_.sputc(value) != EOF);
         recent_ = indent_;
         if (value == '\n')
-            position_.lines(1);
+            position_.Lines(1);
         else
-            position_.columns(1);
+            position_.Columns(1);
     }
 
     _finline void operator ()(const char *data, std::streamsize size) {
         _assert(out_.sputn(data, size) == size);
         recent_ = indent_;
-        position_.columns(size);
+        position_.Columns(size);
     }
 
     _finline void operator ()(const char *data) {
@@ -201,6 +199,13 @@ struct CYStatement :
 
 typedef CYList<CYStatement> CYStatements;
 
+struct CYForInitializer :
+    CYStatement
+{
+    virtual CYForInitializer *Replace(CYContext &context) = 0;
+    virtual void Output(CYOutput &out, CYFlags flags) const = 0;
+};
+
 struct CYWord :
     CYThing,
     CYPropertyName
@@ -212,10 +217,6 @@ struct CYWord :
     {
     }
 
-    void Set(const char *value) {
-        word_ = value;
-    }
-
     virtual bool Constructor() const {
         return strcmp(word_, "constructor") == 0;
     }
@@ -232,24 +233,33 @@ _finline std::ostream &operator <<(std::ostream &lhs, const CYWord &rhs) {
     return lhs << rhs.Word();
 }
 
+enum CYIdentifierKind {
+    CYIdentifierArgument,
+    CYIdentifierCatch,
+    CYIdentifierGlobal,
+    CYIdentifierLexical,
+    CYIdentifierMagic,
+    CYIdentifierOther,
+    CYIdentifierVariable,
+};
+
 struct CYIdentifier :
     CYNext<CYIdentifier>,
     CYWord
 {
-    CYIdentifier *replace_;
+    CYLocation location_;
     size_t offset_;
     size_t usage_;
 
     CYIdentifier(const char *word) :
         CYWord(word),
-        replace_(NULL),
         offset_(0),
         usage_(0)
     {
     }
 
     virtual const char *Word() const;
-    CYIdentifier *Replace(CYContext &context);
+    CYIdentifier *Replace(CYContext &context, CYIdentifierKind);
 };
 
 struct CYLabel :
@@ -286,38 +296,43 @@ struct CYIdentifierValueLess :
     }
 };
 
-enum CYIdentifierFlags {
-    CYIdentifierArgument,
-    CYIdentifierVariable,
-    CYIdentifierOther,
-    CYIdentifierMagic,
-    CYIdentifierCatch,
-};
-
-typedef std::set<const char *, CYCStringLess> CYCStringSet;
-typedef std::set<CYIdentifier *, CYIdentifierValueLess> CYIdentifierValueSet;
-typedef std::map<CYIdentifier *, CYIdentifierFlags> CYIdentifierAddressFlagsMap;
-
-struct CYIdentifierUsage {
+struct CYIdentifierFlags :
+    CYNext<CYIdentifierFlags>
+{
     CYIdentifier *identifier_;
-    size_t usage_;
-};
+    CYIdentifierKind kind_;
+    unsigned count_;
+    unsigned offset_;
 
-typedef std::vector<CYIdentifierUsage> CYIdentifierUsageVector;
+    CYIdentifierFlags(CYIdentifier *identifier, CYIdentifierKind kind, CYIdentifierFlags *next = NULL) :
+        CYNext<CYIdentifierFlags>(next),
+        identifier_(identifier),
+        kind_(kind),
+        count_(0),
+        offset_(0)
+    {
+    }
+};
 
 struct CYScope {
     bool transparent_;
     CYScope *parent_;
+    bool damaged_;
+    CYIdentifierFlags *shadow_;
 
-    CYIdentifierAddressFlagsMap internal_;
-    CYIdentifierValueSet identifiers_;
+    CYIdentifierFlags *internal_;
 
     CYScope(bool transparent, CYContext &context);
 
-    void Declare(CYContext &context, CYIdentifier *identifier, CYIdentifierFlags flags);
-    virtual CYIdentifier *Lookup(CYContext &context, CYIdentifier *identifier);
-    void Merge(CYContext &context, CYIdentifier *identifier);
+    CYIdentifierFlags *Lookup(CYContext &context, const char *word);
+    CYIdentifierFlags *Lookup(CYContext &context, CYIdentifier *identifier);
+
+    CYIdentifierFlags *Declare(CYContext &context, CYIdentifier *identifier, CYIdentifierKind kind);
+    void Merge(CYContext &context, const CYIdentifierFlags *flags);
+
     void Close(CYContext &context, CYStatement *&statements);
+    void Close(CYContext &context);
+    void Damage();
 };
 
 struct CYScript :
@@ -344,12 +359,12 @@ struct CYContext {
     CYThisScope *this_;
     CYIdentifier *super_;
 
-    CYIdentifierUsageVector rename_;
-
     CYNonLocal *nonlocal_;
     CYNonLocal *nextlocal_;
     unsigned unique_;
 
+    std::vector<CYIdentifier *> replace_;
+
     CYContext(CYOptions &options) :
         options_(options),
         scope_(NULL),
@@ -444,18 +459,13 @@ struct CYBlock :
     virtual CYStatement *Return();
 };
 
-struct CYForInitializer {
-    virtual CYExpression *Replace(CYContext &context) = 0;
-    virtual void Output(CYOutput &out, CYFlags flags) const = 0;
-};
+struct CYTarget;
+struct CYVar;
 
 struct CYForInInitializer {
-    virtual void ForIn(CYOutput &out, CYFlags flags) const = 0;
-    virtual CYStatement *ForEachIn(CYContext &out, CYExpression *value) = 0;
-
-    virtual CYExpression *Replace(CYContext &context) = 0;
-    virtual CYAssignment *Assignment(CYContext &context) = 0;
+    virtual CYStatement *Initialize(CYContext &context, CYExpression *value) = 0;
 
+    virtual CYTarget *Replace(CYContext &context) = 0;
     virtual void Output(CYOutput &out, CYFlags flags) const = 0;
 };
 
@@ -465,8 +475,6 @@ struct CYNumber;
 struct CYString;
 
 struct CYExpression :
-    CYForInitializer,
-    CYForInInitializer,
     CYThing
 {
     virtual int Precedence() const = 0;
@@ -475,17 +483,17 @@ struct CYExpression :
         return true;
     }
 
-    virtual void ForIn(CYOutput &out, CYFlags flags) const;
-    virtual CYStatement *ForEachIn(CYContext &out, CYExpression *value);
+    virtual bool Eval() const {
+        return false;
+    }
 
-    virtual CYExpression *AddArgument(CYContext &context, CYExpression *value);
+    virtual CYTarget *AddArgument(CYContext &context, CYExpression *value);
 
     virtual void Output(CYOutput &out) const;
     virtual void Output(CYOutput &out, CYFlags flags) const = 0;
     void Output(CYOutput &out, int precedence, CYFlags flags) const;
 
     virtual CYExpression *Replace(CYContext &context) = 0;
-    virtual CYAssignment *Assignment(CYContext &context);
 
     virtual CYExpression *Primitive(CYContext &context) {
         return NULL;
@@ -506,6 +514,20 @@ struct CYExpression :
     }
 };
 
+struct CYTarget :
+    CYExpression,
+    CYForInInitializer
+{
+    virtual bool RightHand() const {
+        return false;
+    }
+
+    virtual CYStatement *Initialize(CYContext &context, CYExpression *value);
+
+    virtual CYTarget *Replace(CYContext &context) = 0;
+    using CYExpression::Output;
+};
+
 #define CYAlphabetic(value) \
     virtual bool Alphabetic() const { \
         return value; \
@@ -517,11 +539,6 @@ struct CYExpression :
         return Precedence_; \
     }
 
-#define CYRightHand(value) \
-    virtual bool RightHand() const { \
-        return value; \
-    }
-
 struct CYCompound :
     CYExpression
 {
@@ -545,7 +562,7 @@ struct CYCompound :
 };
 
 struct CYParenthetical :
-    CYExpression
+    CYTarget
 {
     CYExpression *expression_;
 
@@ -556,7 +573,7 @@ struct CYParenthetical :
 
     CYPrecedence(0)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -566,9 +583,9 @@ struct CYFunctionParameter :
     CYNext<CYFunctionParameter>,
     CYThing
 {
-    CYForInInitializer *initialiser_;
+    CYDeclaration *initialiser_;
 
-    CYFunctionParameter(CYForInInitializer *initialiser, CYFunctionParameter *next = NULL) :
+    CYFunctionParameter(CYDeclaration *initialiser, CYFunctionParameter *next = NULL) :
         CYNext<CYFunctionParameter>(next),
         initialiser_(initialiser)
     {
@@ -651,7 +668,7 @@ struct CYIfComprehension :
 };
 
 struct CYArrayComprehension :
-    CYExpression
+    CYTarget
 {
     CYExpression *expression_;
     CYComprehension *comprehensions_;
@@ -664,15 +681,16 @@ struct CYArrayComprehension :
 
     CYPrecedence(0)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYLiteral :
-    CYExpression
+    CYTarget
 {
+    CYLocation location_;
+
     CYPrecedence(0)
-    CYRightHand(false)
 
     virtual CYExpression *Primitive(CYContext &context) {
         return this;
@@ -682,14 +700,13 @@ struct CYLiteral :
 struct CYTrivial :
     CYLiteral
 {
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
 };
 
 struct CYMagic :
-    CYExpression
+    CYTarget
 {
     CYPrecedence(0)
-    CYRightHand(false)
 };
 
 struct CYRange {
@@ -782,7 +799,7 @@ struct CYSpan :
 };
 
 struct CYTemplate :
-    CYExpression
+    CYTarget
 {
     CYString *string_;
     CYSpan *spans_;
@@ -794,9 +811,8 @@ struct CYTemplate :
     }
 
     CYPrecedence(0)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -873,13 +889,19 @@ struct CYNull :
 struct CYThis :
     CYMagic
 {
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYBoolean :
     CYTrivial
 {
+    CYPrecedence(4)
+
+    virtual bool RightHand() const {
+        return true;
+    }
+
     virtual bool Value() const = 0;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
@@ -907,7 +929,7 @@ struct CYTrue :
 };
 
 struct CYVariable :
-    CYExpression
+    CYTarget
 {
     CYIdentifier *name_;
 
@@ -922,9 +944,12 @@ struct CYVariable :
     }
 
     CYPrecedence(0)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual bool Eval() const {
+        return strcmp(name_->Word(), "eval") == 0;
+    }
+
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 
     virtual CYFunctionParameter *Parameter() const;
@@ -993,17 +1018,17 @@ struct CYPostfix :
 struct CYAssignment :
     CYExpression
 {
-    CYExpression *lhs_;
+    CYTarget *lhs_;
     CYExpression *rhs_;
 
-    CYAssignment(CYExpression *lhs, CYExpression *rhs) :
+    CYAssignment(CYTarget *lhs, CYExpression *rhs) :
         lhs_(lhs),
         rhs_(rhs)
     {
     }
 
-    void SetLeft(CYExpression *lhs) {
-        lhs_ = lhs;
+    void SetRight(CYExpression *rhs) {
+        rhs_ = rhs;
     }
 
     virtual const char *Operator() const = 0;
@@ -1112,13 +1137,11 @@ struct CYArray :
     {
     }
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
-struct CYDeclaration :
-    CYForInInitializer
-{
+struct CYDeclaration {
     CYIdentifier *identifier_;
     CYExpression *initialiser_;
 
@@ -1128,14 +1151,43 @@ struct CYDeclaration :
     {
     }
 
-    virtual void ForIn(CYOutput &out, CYFlags flags) const;
-    virtual CYStatement *ForEachIn(CYContext &out, CYExpression *value);
+    CYTarget *Target(CYContext &context);
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYAssignment *Replace(CYContext &context, CYIdentifierKind kind);
+    virtual void Output(CYOutput &out, CYFlags flags) const;
+};
 
-    virtual CYAssignment *Assignment(CYContext &context);
-    CYVariable *Variable(CYContext &context);
+struct CYForLexical :
+    CYForInInitializer
+{
+    bool constant_;
+    CYDeclaration *declaration_;
+
+    CYForLexical(bool constant, CYDeclaration *declaration) :
+        constant_(constant),
+        declaration_(declaration)
+    {
+    }
+
+    virtual CYStatement *Initialize(CYContext &context, CYExpression *value);
+
+    virtual CYTarget *Replace(CYContext &context);
+    virtual void Output(CYOutput &out, CYFlags flags) const;
+};
+
+struct CYForVariable :
+    CYForInInitializer
+{
+    CYDeclaration *declaration_;
 
+    CYForVariable(CYDeclaration *declaration) :
+        declaration_(declaration)
+    {
+    }
+
+    virtual CYStatement *Initialize(CYContext &context, CYExpression *value);
+
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1151,9 +1203,8 @@ struct CYDeclarations :
     {
     }
 
-    void Replace(CYContext &context);
+    CYExpression *Replace(CYContext &context, CYIdentifierKind kind);
 
-    CYExpression *Expression(CYContext &context);
     CYArgument *Argument(CYContext &context);
     CYFunctionParameter *Parameter(CYContext &context);
 
@@ -1161,22 +1212,8 @@ struct CYDeclarations :
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
-struct CYForDeclarations :
-    CYForInitializer
-{
-    CYDeclarations *declarations_;
-
-    CYForDeclarations(CYDeclarations *declarations) :
-        declarations_(declarations)
-    {
-    }
-
-    virtual CYExpression *Replace(CYContext &context);
-    virtual void Output(CYOutput &out, CYFlags flags) const;
-};
-
 struct CYVar :
-    CYStatement
+    CYForInitializer
 {
     CYDeclarations *declarations_;
 
@@ -1187,25 +1224,25 @@ struct CYVar :
 
     CYCompact(None)
 
-    virtual CYStatement *Replace(CYContext &context);
+    virtual CYForInitializer *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
-struct CYLetStatement :
-    CYStatement
+struct CYLet :
+    CYForInitializer
 {
+    bool constant_;
     CYDeclarations *declarations_;
-    CYStatement *code_;
 
-    CYLetStatement(CYDeclarations *declarations, CYStatement *code) :
-        declarations_(declarations),
-        code_(code)
+    CYLet(bool constant, CYDeclarations *declarations) :
+        constant_(constant),
+        declarations_(declarations)
     {
     }
 
-    CYCompact(Long)
+    CYCompact(None)
 
-    virtual CYStatement *Replace(CYContext &context);
+    virtual CYForInitializer *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1230,10 +1267,12 @@ struct CYProperty :
     {
     }
 
+    virtual bool Update() const;
+
     CYProperty *ReplaceAll(CYContext &context, CYBuilder &builder, CYExpression *self, bool update);
-    void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, bool computed);
+    void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, bool protect);
 
-    virtual void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name) = 0;
+    virtual void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) = 0;
 
     virtual void Replace(CYContext &context) = 0;
     virtual void Output(CYOutput &out) const;
@@ -1250,7 +1289,7 @@ struct CYPropertyValue :
     {
     }
 
-    virtual void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name);
+    virtual void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect);
     virtual void Replace(CYContext &context);
     virtual void Output(CYOutput &out) const;
 };
@@ -1297,6 +1336,26 @@ struct CYForIn :
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
+struct CYForInitialized :
+    CYStatement
+{
+    CYDeclaration *declaration_;
+    CYExpression *set_;
+    CYStatement *code_;
+
+    CYForInitialized(CYDeclaration *declaration, CYExpression *set, CYStatement *code) :
+        declaration_(declaration),
+        set_(set),
+        code_(code)
+    {
+    }
+
+    CYCompact(Long)
+
+    virtual CYStatement *Replace(CYContext &context);
+    virtual void Output(CYOutput &out, CYFlags flags) const;
+};
+
 struct CYForOf :
     CYStatement
 {
@@ -1327,12 +1386,12 @@ struct CYObject :
     {
     }
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYMember :
-    CYExpression
+    CYTarget
 {
     CYExpression *object_;
     CYExpression *property_;
@@ -1357,9 +1416,8 @@ struct CYDirectMember :
     }
 
     CYPrecedence(1)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1372,9 +1430,8 @@ struct CYIndirectMember :
     }
 
     CYPrecedence(1)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1382,7 +1439,7 @@ namespace cy {
 namespace Syntax {
 
 struct New :
-    CYExpression
+    CYTarget
 {
     CYExpression *constructor_;
     CYArgument *arguments_;
@@ -1397,41 +1454,61 @@ struct New :
         return arguments_ == NULL ? 2 : 1;
     }
 
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 
-    virtual CYExpression *AddArgument(CYContext &context, CYExpression *value);
+    virtual CYTarget *AddArgument(CYContext &context, CYExpression *value);
 };
 
 } }
 
-struct CYCall :
-    CYExpression
+struct CYApply :
+    CYTarget
 {
-    CYExpression *function_;
     CYArgument *arguments_;
 
-    CYCall(CYExpression *function, CYArgument *arguments = NULL) :
-        function_(function),
+    CYApply(CYArgument *arguments = NULL) :
         arguments_(arguments)
     {
     }
 
     CYPrecedence(1)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *AddArgument(CYContext &context, CYExpression *value);
+};
+
+struct CYCall :
+    CYApply
+{
+    CYExpression *function_;
+
+    CYCall(CYExpression *function, CYArgument *arguments = NULL) :
+        CYApply(arguments),
+        function_(function)
+    {
+    }
+
     virtual void Output(CYOutput &out, CYFlags flags) const;
+    virtual CYTarget *Replace(CYContext &context);
+};
 
-    virtual CYExpression *AddArgument(CYContext &context, CYExpression *value);
+struct CYEval :
+    CYApply
+{
+    CYEval(CYArgument *arguments) :
+        CYApply(arguments)
+    {
+    }
+
+    virtual void Output(CYOutput &out, CYFlags flags) const;
+    virtual CYTarget *Replace(CYContext &context);
 };
 
 struct CYRubyProc;
 
 struct CYRubyBlock :
-    CYExpression
+    CYTarget
 {
     CYExpression *call_;
     CYRubyProc *proc_;
@@ -1443,12 +1520,11 @@ struct CYRubyBlock :
     }
 
     CYPrecedence(1)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 
-    virtual CYExpression *AddArgument(CYContext &context, CYExpression *value);
+    virtual CYTarget *AddArgument(CYContext &context, CYExpression *value);
 };
 
 struct CYIf :
@@ -1533,7 +1609,7 @@ struct CYFunction {
 
 struct CYFunctionExpression :
     CYFunction,
-    CYExpression
+    CYTarget
 {
     CYIdentifier *name_;
 
@@ -1544,9 +1620,8 @@ struct CYFunctionExpression :
     }
 
     CYPrecedence(0)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    CYTarget *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1560,15 +1635,14 @@ struct CYFatArrow :
     }
 
     CYPrecedence(0)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    CYExpression *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYRubyProc :
     CYFunction,
-    CYExpression
+    CYTarget
 {
     CYRubyProc(CYFunctionParameter *parameters, CYStatement *code) :
         CYFunction(parameters, code)
@@ -1576,9 +1650,8 @@ struct CYRubyProc :
     }
 
     CYPrecedence(0)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    CYTarget *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1596,7 +1669,7 @@ struct CYFunctionStatement :
 
     CYCompact(None)
 
-    virtual CYStatement *Replace(CYContext &context);
+    CYStatement *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1626,7 +1699,7 @@ struct CYPropertyGetter :
     {
     }
 
-    virtual void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name);
+    virtual void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect);
     virtual void Output(CYOutput &out) const;
 };
 
@@ -1638,7 +1711,7 @@ struct CYPropertySetter :
     {
     }
 
-    virtual void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name);
+    virtual void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect);
     virtual void Output(CYOutput &out) const;
 };
 
@@ -1650,9 +1723,11 @@ struct CYPropertyMethod :
     {
     }
 
+    bool Update() const override;
+
     virtual CYFunctionExpression *Constructor();
 
-    virtual void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name);
+    virtual void Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect);
     virtual void Output(CYOutput &out) const;
 };
 
@@ -1675,7 +1750,7 @@ struct CYClassTail :
 };
 
 struct CYClassExpression :
-    CYExpression
+    CYTarget
 {
     CYIdentifier *name_;
     CYClassTail *tail_;
@@ -1687,9 +1762,8 @@ struct CYClassExpression :
     }
 
     CYPrecedence(0)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    CYTarget *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1707,12 +1781,12 @@ struct CYClassStatement :
 
     CYCompact(Long)
 
-    virtual CYStatement *Replace(CYContext &context);
+    CYStatement *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYSuperCall :
-    CYExpression
+    CYTarget
 {
     CYArgument *arguments_;
 
@@ -1722,14 +1796,13 @@ struct CYSuperCall :
     }
 
     CYPrecedence(2)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    CYTarget *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYSuperAccess :
-    CYExpression
+    CYTarget
 {
     CYExpression *property_;
 
@@ -1739,14 +1812,13 @@ struct CYSuperAccess :
     }
 
     CYPrecedence(1)
-    CYRightHand(false)
 
-    virtual CYExpression *Replace(CYContext &context);
+    CYTarget *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 struct CYExpress :
-    CYStatement
+    CYForInitializer
 {
     CYExpression *expression_;
 
@@ -1759,7 +1831,7 @@ struct CYExpress :
 
     CYCompact(None)
 
-    virtual CYStatement *Replace(CYContext &context);
+    CYForInitializer *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 
     virtual CYStatement *Return();
@@ -1777,7 +1849,7 @@ struct CYContinue :
 
     CYCompact(Short)
 
-    virtual CYStatement *Replace(CYContext &context);
+    CYStatement *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1793,7 +1865,7 @@ struct CYBreak :
 
     CYCompact(Short)
 
-    virtual CYStatement *Replace(CYContext &context);
+    CYStatement *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1809,7 +1881,7 @@ struct CYReturn :
 
     CYCompact(None)
 
-    virtual CYStatement *Replace(CYContext &context);
+    CYStatement *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1825,7 +1897,7 @@ struct CYYieldGenerator :
 
     CYPrecedence(0)
 
-    virtual CYExpression *Replace(CYContext &context);
+    CYExpression *Replace(CYContext &context) override;
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1846,11 +1918,11 @@ struct CYYieldValue :
 };
 
 struct CYEmpty :
-    CYStatement
+    CYForInitializer
 {
     CYCompact(Short)
 
-    virtual CYStatement *Replace(CYContext &context);
+    virtual CYForInitializer *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -1871,7 +1943,7 @@ struct CYFinally :
 struct CYTypeSpecifier :
     CYThing
 {
-    virtual CYExpression *Replace(CYContext &context) = 0;
+    virtual CYTarget *Replace(CYContext &context) = 0;
 };
 
 struct CYTypeError :
@@ -1880,7 +1952,7 @@ struct CYTypeError :
     CYTypeError() {
     }
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out) const;
 };
 
@@ -1890,7 +1962,7 @@ struct CYTypeVoid :
     CYTypeVoid() {
     }
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out) const;
 };
 
@@ -1909,7 +1981,7 @@ struct CYTypeVariable :
     {
     }
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out) const;
 };
 
@@ -1923,7 +1995,7 @@ struct CYTypeUnsigned :
     {
     }
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out) const;
 };
 
@@ -1937,7 +2009,7 @@ struct CYTypeSigned :
     {
     }
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out) const;
 };
 
@@ -1951,7 +2023,7 @@ struct CYTypeLong :
     {
     }
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out) const;
 };
 
@@ -1965,7 +2037,7 @@ struct CYTypeShort :
     {
     }
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out) const;
 };
 
@@ -1981,8 +2053,8 @@ struct CYTypeModifier :
 
     virtual int Precedence() const = 0;
 
-    virtual CYExpression *Replace_(CYContext &context, CYExpression *type) = 0;
-    CYExpression *Replace(CYContext &context, CYExpression *type);
+    virtual CYTarget *Replace_(CYContext &context, CYTarget *type) = 0;
+    CYTarget *Replace(CYContext &context, CYTarget *type);
 
     virtual void Output(CYOutput &out, CYIdentifier *identifier) const = 0;
     void Output(CYOutput &out, int precedence, CYIdentifier *identifier) const;
@@ -2003,7 +2075,7 @@ struct CYTypeArrayOf :
 
     CYPrecedence(1)
 
-    virtual CYExpression *Replace_(CYContext &context, CYExpression *type);
+    virtual CYTarget *Replace_(CYContext &context, CYTarget *type);
     virtual void Output(CYOutput &out, CYIdentifier *identifier) const;
 };
 
@@ -2017,7 +2089,7 @@ struct CYTypeConstant :
 
     CYPrecedence(0)
 
-    virtual CYExpression *Replace_(CYContext &context, CYExpression *type);
+    virtual CYTarget *Replace_(CYContext &context, CYTarget *type);
     virtual void Output(CYOutput &out, CYIdentifier *identifier) const;
 };
 
@@ -2031,7 +2103,7 @@ struct CYTypePointerTo :
 
     CYPrecedence(0)
 
-    virtual CYExpression *Replace_(CYContext &context, CYExpression *type);
+    virtual CYTarget *Replace_(CYContext &context, CYTarget *type);
     virtual void Output(CYOutput &out, CYIdentifier *identifier) const;
 };
 
@@ -2045,7 +2117,7 @@ struct CYTypeVolatile :
 
     CYPrecedence(0)
 
-    virtual CYExpression *Replace_(CYContext &context, CYExpression *type);
+    virtual CYTarget *Replace_(CYContext &context, CYTarget *type);
     virtual void Output(CYOutput &out, CYIdentifier *identifier) const;
 };
 
@@ -2078,14 +2150,14 @@ struct CYTypedIdentifier :
         return this;
     }
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out) const;
 
     CYTypeFunctionWith *Function();
 };
 
 struct CYEncodedType :
-    CYExpression
+    CYTarget
 {
     CYTypedIdentifier *typed_;
 
@@ -2096,7 +2168,7 @@ struct CYEncodedType :
 
     CYPrecedence(1)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -2120,7 +2192,7 @@ struct CYTypedParameter :
 };
 
 struct CYLambda :
-    CYExpression
+    CYTarget
 {
     CYTypedIdentifier *typed_;
     CYTypedParameter *parameters_;
@@ -2135,7 +2207,7 @@ struct CYLambda :
 
     CYPrecedence(1)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
     virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
@@ -2218,7 +2290,7 @@ struct CYTypeBlockWith :
 
     CYPrecedence(0)
 
-    virtual CYExpression *Replace_(CYContext &context, CYExpression *type);
+    virtual CYTarget *Replace_(CYContext &context, CYTarget *type);
     virtual void Output(CYOutput &out, CYIdentifier *identifier) const;
 };
 
@@ -2235,7 +2307,7 @@ struct CYTypeFunctionWith :
 
     CYPrecedence(1)
 
-    virtual CYExpression *Replace_(CYContext &context, CYExpression *type);
+    virtual CYTarget *Replace_(CYContext &context, CYTarget *type);
     virtual void Output(CYOutput &out, CYIdentifier *identifier) const;
 
     virtual CYTypeFunctionWith *Function() { return this; }
@@ -2385,20 +2457,20 @@ struct CYAddressOf :
 };
 
 struct CYIndirect :
-    CYPrefix
+    CYTarget
 {
+    CYExpression *rhs_;
+
     CYIndirect(CYExpression *rhs) :
-        CYPrefix(rhs)
+        rhs_(rhs)
     {
     }
 
-    virtual const char *Operator() const {
-        return "*";
-    }
-
-    CYAlphabetic(false)
+    // XXX: this should be checked
+    CYPrecedence(2)
 
-    virtual CYExpression *Replace(CYContext &context);
+    virtual CYTarget *Replace(CYContext &context);
+    virtual void Output(CYOutput &out, CYFlags flags) const;
 };
 
 #define CYReplace \
@@ -2455,7 +2527,7 @@ struct CYIndirect :
     struct CY ## name ## Assign : \
         CYAssignment \
     { args \
-        CY ## name ## Assign(CYExpression *lhs, CYExpression *rhs) : \
+        CY ## name ## Assign(CYTarget *lhs, CYExpression *rhs) : \
             CYAssignment(lhs, rhs) \
         { \
         } \