Fixed some corner cases in flags propogation.

[cycript.git] / Output.cpp

diff --git a/Output.cpp b/Output.cpp
index edd262fdd819dc5b87f9b1a53128ce157e2a369c..f8885247ca89d867ef62e9bfb5e6ee81ba87add3 100644 (file)
--- a/Output.cpp
+++ b/Output.cpp
@@ -3,375 +3,841 @@
 #include <iostream>
 #include <iomanip>
 
 #include <iostream>
 #include <iomanip>
 

-void CYAddressOf::Output(std::ostream &out) const {
-    out << *rhs_ << ".$()";
+#include <objc/runtime.h>
+#include <sstream>
+
+_finline CYFlags operator ~(CYFlags rhs) {
+    return static_cast<CYFlags>(~static_cast<unsigned>(rhs));
+}
+
+_finline CYFlags operator &(CYFlags lhs, CYFlags rhs) {
+    return static_cast<CYFlags>(static_cast<unsigned>(lhs) & static_cast<unsigned>(rhs));
+}
+
+_finline CYFlags operator |(CYFlags lhs, CYFlags rhs) {
+    return static_cast<CYFlags>(static_cast<unsigned>(lhs) | static_cast<unsigned>(rhs));
+}
+
+_finline CYFlags &operator |=(CYFlags &lhs, CYFlags rhs) {
+    return lhs = lhs | rhs;
+}
+
+_finline CYFlags CYLeft(CYFlags flags) {
+    return flags & ~CYNoDangle;
+}
+
+_finline CYFlags CYRight(CYFlags flags) {
+    return flags & ~CYNoBF;
+}
+
+_finline CYFlags CYCenter(CYFlags flags) {
+    return CYLeft(CYRight(flags));
+}
+
+#define CYPA 16
+
+void CYOutput::Terminate() {
+    out_ << ';';
+    mode_ = NoMode;
+}
+
+CYOutput &CYOutput::operator <<(char rhs) {
+    if (rhs == ' ' || rhs == '\n')
+        if (pretty_)
+            out_ << rhs;
+        else goto done;
+    else if (rhs == '\t')
+        if (pretty_)
+            for (unsigned i(0); i != indent_; ++i)
+                out_ << "    ";
+        else goto done;
+    else goto work;
+
+    mode_ = NoMode;
+    goto done;
+
+  work:
+    if (mode_ == Terminated && rhs != '}')
+        out_ << ';';
+
+    if (rhs == ';') {
+        if (pretty_)
+            goto none;
+        else {
+            mode_ = Terminated;
+            goto done;
+        }
+    } else if (rhs == '-') {
+        if (mode_ == NoHyphen)
+            out_ << ' ';
+        mode_ = NoHyphen;
+    } else if (WordEndRange_[rhs]) {
+        if (mode_ == NoLetter)
+            out_ << ' ';
+        mode_ = NoLetter;
+    } else none:
+        mode_ = NoMode;
+
+    out_ << rhs;
+  done:
+    return *this;
+}
+
+CYOutput &CYOutput::operator <<(const char *rhs) {
+    size_t size(strlen(rhs));
+
+    if (size == 1)
+        return *this << *rhs;
+
+    if (mode_ == Terminated)
+        out_ << ';';
+    else if (
+        mode_ == NoHyphen && *rhs == '-' ||
+        mode_ == NoLetter && WordEndRange_[*rhs]
+    )
+        out_ << ' ';
+
+    if (WordEndRange_[rhs[size - 1]])
+        mode_ = NoLetter;
+    else
+        mode_ = NoMode;
+
+    out_ << rhs;
+    return *this;
+}
+
+void OutputBody(CYOutput &out, CYStatement *body) {
+    out << ' ' << '{' << '\n';
+    ++out.indent_;
+    if (body != NULL)
+        body->Multiple(out);
+    --out.indent_;
+    out << '\t' << '}';
+}
+
+void CYAddressOf::Output(CYOutput &out, CYFlags flags) const {
+    rhs_->Output(out, 1, CYLeft(flags));
+    out << ".$cya()";

 }
 
 }
 

-void CYArgument::Output(std::ostream &out, bool send) const {
-    if (!send && name_ != NULL) {
+void CYArgument::Output(CYOutput &out) const {
+    if (name_ != NULL) {

         out << *name_;
         if (value_ != NULL)
         out << *name_;
         if (value_ != NULL)

-            out << ":";
-    }
-    if (value_ != NULL) {
-        if (send)
-            out << ',';
-        value_->Output(out, true);
+            out << ':' << ' ';

     }
     }

+    if (value_ != NULL)
+        value_->Output(out, CYPA, CYNoFlags);

     if (next_ != NULL) {
     if (next_ != NULL) {

-        if (!send)
-            if (next_->name_ != NULL)
-                out << ',';
-            else
-                out << ' ';
-        next_->Output(out, send);
+        if (next_->name_ == NULL)
+            out << ',';
+        out << ' ' << *next_;

     }
 }
 
     }
 }
 

-void CYArray::Output(std::ostream &out) const {
-    out << '[';
-    if (elements_ != NULL)
-        elements_->Output(out);
-    out << ']';
+void CYArray::Output(CYOutput &out, CYFlags flags) const {
+    out << '[' << elements_ << ']';
+}
+
+void CYArrayComprehension::Output(CYOutput &out, CYFlags flags) const {
+    // XXX: I don't necc. need the ()s
+    out << "(function($cyv";
+    for (CYComprehension *comprehension(comprehensions_); comprehension != NULL; comprehension = comprehension->next_)
+        if (const char *name = comprehension->Name())
+            out << ',' << name;
+    out << "){";
+    out << "$cyv=[];";
+    comprehensions_->Output(out);
+    out << "$cyv.push(";
+    expression_->Output(out, CYPA, CYNoFlags);
+    out << ");";
+    for (CYComprehension *comprehension(comprehensions_); comprehension != NULL; comprehension = comprehension->next_)
+        comprehension->End_(out);
+    out << "return $cyv;";
+    out << "}())";

 }
 
 }
 

-void CYBoolean::Output(std::ostream &out) const {
+void CYAssignment::Output(CYOutput &out, CYFlags flags) const {
+    lhs_->Output(out, Precedence() - 1, CYLeft(flags) | CYNoRightHand);
+    out << ' ' << Operator() << ' ';
+    rhs_->Output(out, Precedence(), CYRight(flags));
+}
+
+void CYBlock::Output(CYOutput &out, CYFlags flags) const {
+    statements_->Single(out, flags);
+}
+
+void CYBoolean::Output(CYOutput &out, CYFlags flags) const {

     out << (Value() ? "true" : "false");
 }
 
     out << (Value() ? "true" : "false");
 }
 

-void CYBreak::Output(std::ostream &out) const {
+void CYBreak::Output(CYOutput &out, CYFlags flags) const {

     out << "break";
     if (label_ != NULL)
         out << ' ' << *label_;
     out << ';';
 }
 
     out << "break";
     if (label_ != NULL)
         out << ' ' << *label_;
     out << ';';
 }
 

-void CYCall::Output(std::ostream &out) const {
-    out << *function_ << '(';
-    if (arguments_ != NULL)
-        arguments_->Output(out, false);
+void CYCall::Output(CYOutput &out, CYFlags flags) const {
+    bool protect((flags & CYNoCall) != 0);
+    if (protect)
+        out << '(';
+    function_->Output(out, Precedence(), protect ? CYNoFlags : flags);
+    out << '(' << arguments_ << ')';
+    if (protect)
+        out << ')';
+}
+
+void CYCatch::Output(CYOutput &out) const {
+    out << "catch" << ' ' << '(' << *name_ << ')' << ' ' << '{';
+    if (code_ != NULL)
+        code_->Multiple(out);
+    out << '}';
+}
+
+void CYCategory::Output(CYOutput &out, CYFlags flags) const {
+    out << "(function($cys,$cyp,$cyc,$cyn,$cyt){";
+    out << "$cyp=object_getClass($cys);";
+    out << "$cyc=$cys;";
+    if (messages_ != NULL)
+        messages_->Output(out, true);
+    out << "})(";
+    name_->ClassName(out, true);

     out << ')';
     out << ')';

+    out << ';';

 }
 
 }
 

-void CYCatch::Output(std::ostream &out) const {
-    out << "catch(" << *name_ << ')';
-    code_->Output(out, true);
+void CYClass::Output(CYOutput &out, CYFlags flags) const {
+    // XXX: I don't necc. need the ()s
+    out << "(function($cys,$cyp,$cyc,$cyn,$cyt,$cym){";
+    out << "$cyp=object_getClass($cys);";
+    out << "$cyc=objc_allocateClassPair($cys,";
+    if (name_ != NULL)
+        name_->ClassName(out, false);
+    else
+        out << "$cyq(\"CY$\")";
+    out << ",0);";
+    out << "$cym=object_getClass($cyc);";
+    if (fields_ != NULL)
+        fields_->Output(out);
+    if (messages_ != NULL)
+        messages_->Output(out, false);
+    out << "objc_registerClassPair($cyc);";
+    out << "return $cyc;";
+    out << "}(";
+    if (super_ != NULL)
+        super_->Output(out, CYPA, CYNoFlags);
+    else
+        out << "null";
+    out << "))";

 }
 
 }
 

-void CYCondition::Output(std::ostream &out) const {
-    out << *test_ << '?';
+void CYClassExpression::Output(CYOutput &out, CYFlags flags) const {
+    CYClass::Output(out, flags);
+}
+
+void CYClassStatement::Output(CYOutput &out, CYFlags flags) const {
+    CYClass::Output(out, flags);
+}
+
+void CYCompound::Output(CYOutput &out, CYFlags flags) const {
+    if (CYExpression *expression = expressions_)
+        if (CYExpression *next = expression->next_) {
+            expression->Output(out, CYLeft(flags));
+            CYFlags center(CYCenter(flags));
+            while (next != NULL) {
+                expression = next;
+                out << ',' << ' ';
+                next = expression->next_;
+                CYFlags right(next != NULL ? center : CYRight(flags));
+                expression->Output(out, right);
+            }
+        } else
+            expression->Output(out, flags);
+}
+
+void CYComprehension::Output(CYOutput &out) const {
+    Begin_(out);
+    out << next_;
+}
+
+void CYCondition::Output(CYOutput &out, CYFlags flags) const {
+    test_->Output(out, Precedence() - 1, CYLeft(flags));
+    out << ' ' << '?' << ' ';

     if (true_ != NULL)
     if (true_ != NULL)

-        out << *true_;
-    out << ':' << *false_;
+        true_->Output(out, CYPA, CYNoFlags);
+    out << ' ' << ':' << ' ';
+    false_->Output(out, CYPA, CYRight(flags));

 }
 
 }
 

-void CYContinue::Output(std::ostream &out) const {
+void CYContinue::Output(CYOutput &out, CYFlags flags) const {

     out << "continue";
     if (label_ != NULL)
         out << ' ' << *label_;
     out << ';';
 }
 
     out << "continue";
     if (label_ != NULL)
         out << ' ' << *label_;
     out << ';';
 }
 

-void CYClause::Output(std::ostream &out) const {
+void CYClause::Output(CYOutput &out) const {

     if (case_ != NULL)
     if (case_ != NULL)

-        out << "case" << *case_;
+        out << "case" << ' ' << *case_;

     else
         out << "default";
     else
         out << "default";

-    out << ':';
+    out << ':' << '\n';

     if (code_ != NULL)
     if (code_ != NULL)

-        code_->Output(out, false);
-    out << *next_;
+        code_->Multiple(out, CYNoFlags);
+    out << next_;

 }
 
 }
 

-void CYDeclaration::Part(std::ostream &out) const {
-    out << "var ";
-    Output(out);
+const char *CYDeclaration::ForEachIn() const {
+    return identifier_->Value();
+}
+
+void CYDeclaration::ForIn(CYOutput &out, CYFlags flags) const {
+    out << "var";
+    Output(out, CYRight(flags));

 }
 
 }
 

-void CYDeclaration::Output(std::ostream &out) const {
+void CYDeclaration::ForEachIn(CYOutput &out) const {

     out << *identifier_;
     out << *identifier_;

-    if (initialiser_ != NULL)
-        out << '=' << *initialiser_;

 }
 
 }
 

-void CYDeclarations::Part(std::ostream &out) const {
-    out << "var ";
+void CYDeclaration::Output(CYOutput &out, CYFlags flags) const {
+    out << *identifier_;
+    if (initialiser_ != NULL) {
+        out << ' ' << '=' << ' ';
+        initialiser_->Output(out, CYPA, CYRight(flags));
+    }
+}
+
+void CYDeclarations::For(CYOutput &out) const {
+    out << "var";
+    Output(out, CYNoIn);
+}
+
+void CYDeclarations::Output(CYOutput &out) const {
+    Output(out, CYNoFlags);
+}
+
+void CYDeclarations::Output(CYOutput &out, CYFlags flags) const {

     const CYDeclarations *declaration(this);
     const CYDeclarations *declaration(this);

-    do {
-        out << *declaration->declaration_;
-        declaration = declaration->next_;
-    } while (declaration != NULL);
+    bool first(true);
+  output:
+    CYDeclarations *next(declaration->next_);
+    CYFlags jacks(first ? CYLeft(flags) : next == NULL ? CYRight(flags) : CYCenter(flags));
+    first = false;
+    declaration->declaration_->Output(out, jacks);
+
+    if (next != NULL) {
+        out << ',' << ' ';
+        declaration = next;
+        goto output;
+    }

 }
 
 }
 

-void CYDeclarations::Output(std::ostream &out) const {
-    Part(out);
-    out << ';';
+void CYDirectMember::Output(CYOutput &out, CYFlags flags) const {
+    object_->Output(out, Precedence(), CYLeft(flags));
+    if (const char *word = property_->Word())
+        out << '.' << word;
+    else
+        out << '[' << *property_ << ']';

 }
 
 }
 

-void CYDoWhile::Output(std::ostream &out) const {
-    out << "do ";
-    code_->Output(out, false);
-    out << "while" << *test_ << ';';
+void CYDoWhile::Output(CYOutput &out, CYFlags flags) const {
+    out << "do";
+    code_->Single(out, CYCenter(flags));
+    out << "while" << ' ' << '(' << *test_ << ')';

 }
 
 }
 

-void CYElement::Output(std::ostream &out) const {
+void CYElement::Output(CYOutput &out) const {

     if (value_ != NULL)
     if (value_ != NULL)

-        value_->Output(out, true);
-    if (next_ != NULL || value_ == NULL)
+        value_->Output(out, CYPA, CYNoFlags);
+    if (next_ != NULL || value_ == NULL) {

         out << ',';
         out << ',';

+        if (next_ != NULL && next_->value_ != NULL)
+            out << ' ';
+    }

     if (next_ != NULL)
         next_->Output(out);
 }
 
     if (next_ != NULL)
         next_->Output(out);
 }
 

-void CYEmpty::Output(std::ostream &out) const {
+void CYEmpty::Output(CYOutput &out, CYFlags flags) const {
+    out.Terminate();
+}
+
+void CYExpress::Output(CYOutput &out, CYFlags flags) const {
+    expression_->Output(out, flags | CYNoBF);

     out << ';';
 }
 
     out << ';';
 }
 

-void CYEmpty::Output(std::ostream &out, bool block) const {
-    if (next_ != NULL)
-        CYSource::Output(out, block);
+void CYExpression::ClassName(CYOutput &out, bool object) const {
+    Output(out, CYPA, CYNoFlags);
+}
+
+const char *CYExpression::ForEachIn() const {
+    return NULL;
+}
+
+void CYExpression::For(CYOutput &out) const {
+    Output(out, CYNoIn);
+}
+
+void CYExpression::ForEachIn(CYOutput &out) const {
+    Output(out, CYPA, CYNoRightHand);
+}
+
+void CYExpression::ForIn(CYOutput &out, CYFlags flags) const {
+    Output(out, flags | CYNoRightHand);
+}
+
+void CYExpression::Output(CYOutput &out) const {
+    Output(out, CYNoFlags);
+}
+
+void CYExpression::Output(CYOutput &out, unsigned precedence, CYFlags flags) const {
+    if (precedence < Precedence() || (flags & CYNoRightHand) != 0 && RightHand())
+        out << '(' << *this << ')';

     else
     else

-        out << "{}";
+        Output(out, flags);
+}
+
+void CYField::Output(CYOutput &out) const {
+    // XXX: implement!
+}
+
+void CYFinally::Output(CYOutput &out) const {
+    out << "finally" << ' ' << '{';
+    if (code_ != NULL)
+        code_->Multiple(out);
+    out << '}';

 }
 
 }
 

-void CYExpress::Output(std::ostream &out) const {
-    expression_->Output(out, true);
+void CYFor::Output(CYOutput &out, CYFlags flags) const {
+    out << "for" << ' ' << '(';
+    if (initialiser_ != NULL)
+        initialiser_->For(out);
+    out.Terminate();
+    out << test_;
+    out.Terminate();
+    out << increment_;
+    out << ')';
+    code_->Single(out, CYRight(flags));
+}
+
+void CYForEachIn::Output(CYOutput &out, CYFlags flags) const {
+    out << "with({$cys:0,$cyt:0}){";
+
+    out << "$cys=";
+    set_->Output(out, CYPA, CYNoFlags);

     out << ';';
     out << ';';

+
+    out << "for($cyt in $cys){";
+
+    initialiser_->ForEachIn(out);
+    out << "=$cys[$cyt];";
+
+    code_->Multiple(out);
+
+    out << '}';
+
+    out << '}';
+}
+
+void CYForEachInComprehension::Begin_(CYOutput &out) const {
+    out << "(function($cys){";
+    out << "$cys=";
+    set_->Output(out, CYPA, CYNoFlags);
+    out << ';';
+
+    out << "for(" << *name_ << " in $cys){";
+    out << *name_ << "=$cys[" << *name_ << "];";
+}
+
+void CYForEachInComprehension::End_(CYOutput &out) const {
+    out << "}}());";

 }
 
 }
 

-void CYExpression::Part(std::ostream &out) const {
-    Output(out, true);
+void CYForIn::Output(CYOutput &out, CYFlags flags) const {
+    out << "for" << ' ' << '(';
+    initialiser_->ForIn(out, CYNoIn);
+    out << "in" << *set_ << ')';
+    code_->Single(out, CYRight(flags));

 }
 
 }
 

-void CYExpression::Output(std::ostream &out, bool raw) const {
-    if (!raw)
+void CYForInComprehension::Begin_(CYOutput &out) const {
+    out << "for" << ' ' << '(' << *name_ << "in" << *set_ << ')';
+}
+
+void CYFunction::Output(CYOutput &out, CYFlags flags) const {
+    // XXX: one could imagine using + here to save a byte
+    bool protect((flags & CYNoFunction) != 0);
+    if (protect)

         out << '(';
         out << '(';

-    Output(out);
-    if (next_ != NULL) {
-        out << ',';
-        next_->Output(out, true);
-    }
-    if (!raw)
+    out << "function";
+    if (name_ != NULL)
+        out << ' ' << *name_;
+    out << '(' << parameters_ << ')';
+    OutputBody(out, body_);
+    if (protect)

         out << ')';
 }
 
         out << ')';
 }
 

-void CYFor::Output(std::ostream &out) const {
-    out << "for(";
-    if (initialiser_ != NULL)
-        initialiser_->Part(out);
-    out << ';';
-    if (test_ != NULL)
-        test_->Output(out, true);
-    out << ';';
-    if (increment_ != NULL)
-        increment_->Output(out, true);
-    out << ')';
-    code_->Output(out, false);
+void CYFunctionExpression::Output(CYOutput &out, CYFlags flags) const {
+    CYFunction::Output(out, flags);

 }
 
 }
 

-void CYForIn::Output(std::ostream &out) const {
-    out << "for(";
-    initialiser_->Part(out);
-    out << " in ";
-    set_->Output(out, true);
-    out << ')';
-    code_->Output(out, false);
+void CYFunctionStatement::Output(CYOutput &out, CYFlags flags) const {
+    CYFunction::Output(out, flags);

 }
 
 }
 

-void CYFunction::Output(std::ostream &out) const {
-    CYLambda::Output(out);
+void CYFunctionParameter::Output(CYOutput &out) const {
+    out << *name_;
+    if (next_ != NULL)
+        out << ',' << ' ' << *next_;

 }
 
 }
 

-void CYIf::Output(std::ostream &out) const {
-    out << "if" << *test_;
-    true_->Output(out, true);
+void CYIf::Output(CYOutput &out, CYFlags flags) const {
+    bool protect(false);
+    if (false_ == NULL && (flags & CYNoDangle) != 0) {
+        protect = true;
+        out << '{';
+    }
+
+    out << "if" << ' ' << '(' << *test_ << ')';
+
+    CYFlags right(protect ? CYNoFlags : CYRight(flags));
+
+    CYFlags jacks(CYNoDangle);
+    if (false_ == NULL)
+        jacks |= right;
+    else
+        jacks |= protect ? CYNoFlags : CYCenter(flags);
+
+    bool single(true_->Single(out, jacks));
+

     if (false_ != NULL) {
     if (false_ != NULL) {

-        out << "else ";
-        false_->Output(out, false);
+        out << (single ? '\t' : ' ');
+        out << "else";
+        false_->Single(out, right);

     }
     }

+
+    if (protect)
+        out << '}';

 }
 
 }
 

-void CYIndirect::Output(std::ostream &out) const {
-    out << *rhs_ << "[0]";
+void CYIfComprehension::Begin_(CYOutput &out) const {
+    out << "if" << '(' << *test_ << ')';

 }
 
 }
 

-void CYInfix::Output(std::ostream &out) const {
-    out << *lhs_ << Operator() << *rhs_;
+void CYIndirect::Output(CYOutput &out, CYFlags flags) const {
+    rhs_->Output(out, 1, CYLeft(flags));
+    out << ".$cyi";

 }
 
 }
 

-void CYLambda::Output(std::ostream &out) const {
-    out << "function";
-    if (name_ != NULL)
-        out << ' ' << *name_;
-    out << '(';
-    if (parameters_ != NULL)
-        out << *parameters_;
-    out << ')';
-    body_->Output(out, true);
+void CYIndirectMember::Output(CYOutput &out, CYFlags flags) const {
+    object_->Output(out, Precedence(), CYLeft(flags));
+    out << ".$cyi";
+    if (const char *word = property_->Word())
+        out << '.' << word;
+    else
+        out << '[' << *property_ << ']';
+}
+
+void CYInfix::Output(CYOutput &out, CYFlags flags) const {
+    const char *name(Operator());
+    bool protect((flags & CYNoIn) != 0 && strcmp(name, "in"));
+    if (protect)
+        out << '(';
+    CYFlags left(protect ? CYNoFlags : CYLeft(flags));
+    lhs_->Output(out, Precedence(), left);
+    out << ' ' << name << ' ';
+    CYFlags right(protect ? CYNoFlags : CYRight(flags));
+    rhs_->Output(out, Precedence() - 1, right);
+    if (protect)
+        out << ')';

 }
 
 }
 

-void CYMember::Output(std::ostream &out) const {
-    out << *object_ << '[';
-    property_->Output(out, true);
-    out << ']';
+void CYLet::Output(CYOutput &out, CYFlags flags) const {
+    out << "let" << ' ' << '(' << *declarations_ << ')' << ' ' << '{';
+    if (statements_ != NULL)
+        statements_->Multiple(out);
+    out << '}';

 }
 
 }
 

-void CYMessage::Output(std::ostream &out) const {
-    out << "objc_msgSend(";
-    self_->Output(out, true);
-    out << ",\"";
-    for (CYArgument *argument(arguments_); argument != NULL; argument = argument->next_)
-        if (argument->name_ != NULL) {
-            out << *argument->name_;
-            if (argument->value_ != NULL)
+void CYMessage::Output(CYOutput &out, bool replace) const {
+    if (next_ != NULL)
+        next_->Output(out, replace);
+    out << "$cyn=new Selector(\"";
+    for (CYMessageParameter *parameter(parameter_); parameter != NULL; parameter = parameter->next_)
+        if (parameter->tag_ != NULL) {
+            out << *parameter->tag_;
+            if (parameter->name_ != NULL)

                 out << ':';
         }
                 out << ':';
         }

-    out << "\"";
+    out << "\");";
+    out << "$cyt=$cyn.type($cy" << (instance_ ? 's' : 'p') << ");";
+    out << "class_" << (replace ? "replace" : "add") << "Method($cy" << (instance_ ? 'c' : 'm') << ",$cyn,";
+    out << "new Functor(function(self,_cmd";
+    for (CYMessageParameter *parameter(parameter_); parameter != NULL; parameter = parameter->next_)
+        if (parameter->name_ != NULL)
+            out << ',' << *parameter->name_;
+    out << "){return function(){";
+    if (body_ != NULL)
+        body_->Multiple(out);
+    out << "}.call(self);},$cyt),$cyt);";
+}
+
+void CYNew::Output(CYOutput &out, CYFlags flags) const {
+    out << "new" << ' ';
+    CYFlags jacks(CYNoCall | CYCenter(flags));
+    constructor_->Output(out, Precedence(), jacks);

     if (arguments_ != NULL)
     if (arguments_ != NULL)

-        arguments_->Output(out, true);
-    out << ')';
+        out << '(' << *arguments_ << ')';

 }
 
 }
 

-void CYNew::Output(std::ostream &out) const {
-    out << "new " << *constructor_ << '(';
-    if (arguments_ != NULL)
-        arguments_->Output(out, false);
-    out << ')';
+void CYNull::Output(CYOutput &out, CYFlags flags) const {
+    CYWord::Output(out);

 }
 
 }
 

-void CYNull::Output(std::ostream &out) const {
-    CYWord::Output(out);
+void CYNumber::Output(CYOutput &out, CYFlags flags) const {
+    char value[32];
+    sprintf(value, "%.17g", Value());
+    out << value;

 }
 
 }
 

-void CYNumber::Output(std::ostream &out) const {
-    // XXX: this is not a useful formatting
-    out << Value();
+void CYNumber::PropertyName(CYOutput &out) const {
+    Output(out, CYNoFlags);

 }
 
 }
 

-void CYObject::Output(std::ostream &out) const {
+void CYObject::Output(CYOutput &out, CYFlags flags) const {
+    bool protect((flags & CYNoBrace) != 0);
+    if (protect)
+        out << '(';

     out << '{';
     out << '{';

-    if (property_ != NULL)
-        property_->Output(out);
+    out << property_;

     out << '}';
     out << '}';

+    if (protect)
+        out << ')';

 }
 
 }
 

-void CYParameter::Output(std::ostream &out) const {
-    out << *name_;
-    if (next_ != NULL) {
-        out << ',';
-        out << *next_;
-    }
+void CYPostfix::Output(CYOutput &out, CYFlags flags) const {
+    lhs_->Output(out, Precedence(), CYLeft(flags));
+    out << Operator();

 }
 
 }
 

-void CYPostfix::Output(std::ostream &out) const {
-    out << *lhs_ << Operator();
+void CYPrefix::Output(CYOutput &out, CYFlags flags) const {
+    const char *name(Operator());
+    out << name;
+    if (Alphabetic())
+        out << ' ';
+    rhs_->Output(out, Precedence(), CYRight(flags));

 }
 
 }
 

-void CYPrefix::Output(std::ostream &out) const {
-    out << Operator() << *rhs_;
+void CYProperty::Output(CYOutput &out) const {
+    name_->PropertyName(out);
+    out << ':' << ' ';
+    value_->Output(out, CYPA, CYNoFlags);
+    if (next_ != NULL)
+        out << ',' << ' ' << *next_;

 }
 
 }
 

-void CYProperty::Output(std::ostream &out) const {
-    out << *name_ << ':' << *value_;
-    if (next_ != NULL) {
-        out << ',';
-        next_->Output(out);
-    }
+void CYRegEx::Output(CYOutput &out, CYFlags flags) const {
+    out << Value();

 }
 
 }
 

-void CYReturn::Output(std::ostream &out) const {
-    out << "return";
-    if (value_ != NULL)
-        out << ' ' << *value_;
-    out << ';';
+void CYReturn::Output(CYOutput &out, CYFlags flags) const {
+    out << "return" << value_ << ';';

 }
 
 }
 

-void CYSelector::Output(std::ostream &out) const {
-    out << '"';
-    out << "<unimplemented>";
-    out << '"';
+void CYSelector::Output(CYOutput &out, CYFlags flags) const {
+    out << "new Selector(\"";
+    if (name_ != NULL)
+        name_->Output(out);
+    out << "\")";

 }
 
 }
 

-void CYSource::Show(std::ostream &out) const {
-    for (const CYSource *next(this); next != NULL; next = next->next_)
-        next->Output(out, false);
+void CYSelectorPart::Output(CYOutput &out) const {
+    out << name_;
+    if (value_)
+        out << ':';
+    out << next_;

 }
 
 }
 

-void CYSource::Output(std::ostream &out, bool block) const {
-    if (!block && next_ == NULL)
-        Output(out);
-    else {
-        out << '{';
-        Show(out);
-        out << '}';
+void CYSend::Output(CYOutput &out, CYFlags flags) const {
+    out << "objc_msgSend(";
+    self_->Output(out, CYPA, CYNoFlags);
+    out << ',';
+    std::ostringstream name;
+    for (CYArgument *argument(arguments_); argument != NULL; argument = argument->next_)
+        if (argument->name_ != NULL) {
+            name << *argument->name_;
+            if (argument->value_ != NULL)
+                name << ':';
+        }
+    out.out_ << reinterpret_cast<void *>(sel_registerName(name.str().c_str()));
+    for (CYArgument *argument(arguments_); argument != NULL; argument = argument->next_)
+        if (argument->value_ != NULL) {
+            out << ',';
+            argument->value_->Output(out, CYPA, CYNoFlags);
+        }
+    out << ')';
+}
+
+void CYStatement::Multiple(CYOutput &out, CYFlags flags) const {
+    bool first(true);
+    for (const CYStatement *next(this); next != NULL; next = next->next_) {
+        bool last(next->next_ == NULL);
+        CYFlags jacks(first ? last ? flags : CYLeft(flags) : last ? CYCenter(flags) : CYRight(flags));
+        first = false;
+        out << '\t';
+        next->Output(out, jacks);
+        out << '\n';

     }
 }
 
     }
 }
 

-void CYString::Output(std::ostream &out) const {
-    out << '\"';
+bool CYStatement::Single(CYOutput &out, CYFlags flags) const {
+    if (next_ != NULL) {
+        out << ' ' << '{' << '\n';
+        ++out.indent_;
+        Multiple(out);
+        --out.indent_;
+        out << '\t' << '}';
+        return false;
+    } else {
+        for (CYLabel *label(labels_); label != NULL; label = label->next_)
+            out << ' ' << *label->name_ << ':';
+        out << '\n';
+        ++out.indent_;
+        out << '\t';
+        Output(out, flags);
+        out << '\n';
+        --out.indent_;
+        return true;
+    }
+}
+
+void CYString::Output(CYOutput &out, CYFlags flags) const {
+    unsigned quot(0), apos(0);
+    for (const char *value(value_), *end(value_ + size_); value != end; ++value)
+        if (*value == '"')
+            ++quot;
+        else if (*value == '\'')
+            ++apos;
+
+    bool single(quot > apos);
+
+    std::ostringstream str;
+
+    str << (single ? '\'' : '"');

     for (const char *value(value_), *end(value_ + size_); value != end; ++value)
         switch (*value) {
     for (const char *value(value_), *end(value_ + size_); value != end; ++value)
         switch (*value) {

-            case '"': out << "\\\""; break;
-            case '\\': out << "\\\\"; break;
-            case '\b': out << "\\b"; break;
-            case '\f': out << "\\f"; break;
-            case '\n': out << "\\n"; break;
-            case '\r': out << "\\r"; break;
-            case '\t': out << "\\t"; break;
-            case '\v': out << "\\v"; break;
+            case '\\': str << "\\\\"; break;
+            case '\b': str << "\\b"; break;
+            case '\f': str << "\\f"; break;
+            case '\n': str << "\\n"; break;
+            case '\r': str << "\\r"; break;
+            case '\t': str << "\\t"; break;
+            case '\v': str << "\\v"; break;
+
+            case '"':
+                if (!single)
+                    str << "\\\"";
+                else goto simple;
+            break;
+
+            case '\'':
+                if (single)
+                    str << "\\'";
+                else goto simple;
+            break;

 
             default:
                 if (*value < 0x20 || *value >= 0x7f)
 
             default:
                 if (*value < 0x20 || *value >= 0x7f)

-                    out << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << unsigned(*value);
-                else
-                    out << *value;
+                    str << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << unsigned(*value);
+                else simple:
+                    str << *value;

         }
         }

-    out << '\"';
+    str << (single ? '\'' : '"');
+
+    out << str.str().c_str();

 }
 
 }
 

-void CYSwitch::Output(std::ostream &out) const {
-    out << "switch" << *value_ << '{';
-    if (clauses_ != NULL)
-        out << *clauses_;
+void CYString::PropertyName(CYOutput &out) const {
+    if (const char *word = Word())
+        out << word;
+    else
+        out << *this;
+}
+
+const char *CYString::Word() const {
+    if (size_ == 0 || !WordStartRange_[value_[0]])
+        return NULL;
+    for (size_t i(1); i != size_; ++i)
+        if (!WordEndRange_[value_[i]])
+            return NULL;
+    const char *value(Value());
+    // XXX: we should probably include the full ECMAScript3+5 list.
+    static const char *reserveds[] = {"class", "const", "enum", "export", "extends", "import", "super", NULL};
+    for (const char **reserved(reserveds); *reserved != NULL; ++reserved)
+        if (strcmp(*reserved, value) == 0)
+            return NULL;
+    return value;
+}
+
+void CYSwitch::Output(CYOutput &out, CYFlags flags) const {
+    out << "switch" << ' ' << '(' << *value_ << ')' << ' ' << '{';
+    out << clauses_;

     out << '}';
 }
 
     out << '}';
 }
 

-void CYThis::Output(std::ostream &out) const {
+void CYThis::Output(CYOutput &out, CYFlags flags) const {

     CYWord::Output(out);
 }
 
     CYWord::Output(out);
 }
 

-void CYThrow::Output(std::ostream &out) const {
-    out << "return";
-    if (value_ != NULL)
-        out << ' ' << *value_;
-    out << ';';
+void CYThrow::Output(CYOutput &out, CYFlags flags) const {
+    out << "throw" << value_ << ';';

 }
 
 }
 

-void CYTry::Output(std::ostream &out) const {
-    out << "try";
-    try_->Output(out, true);
-    if (catch_ != NULL)
-        out << catch_;
-    if (finally_ != NULL) {
-        out << "finally";
-        finally_->Output(out, true);
-    }
+void CYTry::Output(CYOutput &out, CYFlags flags) const {
+    out << "try" << ' ' << '{';
+    if (code_ != NULL)
+        code_->Multiple(out);
+    out << '}';
+    out << catch_;
+    out << finally_;
+}
+
+void CYVar::Output(CYOutput &out, CYFlags flags) const {
+    out << "var";
+    declarations_->Output(out, flags);
+    out << ';';

 }
 
 }
 

-void CYVariable::Output(std::ostream &out) const {
+void CYVariable::Output(CYOutput &out, CYFlags flags) const {

     out << *name_;
 }
 
     out << *name_;
 }
 

-void CYWhile::Output(std::ostream &out) const {
-    out << "while" << *test_;
-    code_->Output(out, false);
+void CYWhile::Output(CYOutput &out, CYFlags flags) const {
+    out << "while" << '(' << *test_ << ')';
+    code_->Single(out, CYRight(flags));

 }
 
 }
 

-void CYWith::Output(std::ostream &out) const {
-    out << "with" << *scope_;
-    code_->Output(out, false);
+void CYWith::Output(CYOutput &out, CYFlags flags) const {
+    out << "with" << '(' << *scope_ << ')';
+    code_->Single(out, CYRight(flags));

 }
 
 }
 

-void CYWord::Output(std::ostream &out) const {
+void CYWord::ClassName(CYOutput &out, bool object) const {
+    if (object)
+        out << "objc_getClass(";
+    out << '"' << Value() << '"';
+    if (object)
+        out << ')';
+}
+
+void CYWord::Output(CYOutput &out) const {

     out << Value();
 }
     out << Value();
 }

+
+void CYWord::PropertyName(CYOutput &out) const {
+    Output(out);
+}