X-Git-Url: https://git.saurik.com/cycript.git/blobdiff_plain/e7ed5354ae029d47ace1bc152aa5686f495e5737..f00bbc8e76b9b599a0795ca56b7d77c32773b592:/Output.cpp

diff --git a/Output.cpp b/Output.cpp
index 4e4040a..d1d033c 100644
--- a/Output.cpp
+++ b/Output.cpp
@@ -1,378 +1,716 @@
+/* Cycript - Optimizing JavaScript Compiler/Runtime
+ * Copyright (C) 2009-2013  Jay Freeman (saurik)
+*/
+
+/* GNU General Public License, Version 3 {{{ */
+/*
+ * Cycript is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 3 of the License,
+ * or (at your option) any later version.
+ *
+ * Cycript is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
+**/
+/* }}} */
+
+#include "cycript.hpp"
 #include "Parser.hpp"
 
-#include <iostream>
-#include <iomanip>
+#include <sstream>
+
+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 if (rhs == '\r') {
+        if (right_) {
+            out_ << '\n';
+            right_ = false;
+        } goto done;
+    } else goto work;
+
+    right_ = true;
+    mode_ = NoMode;
+    goto done;
+
+  work:
+    if (mode_ == Terminated && rhs != '}') {
+        right_ = true;
+        out_ << ';';
+    }
+
+    if (rhs == ';') {
+        if (pretty_)
+            goto none;
+        else {
+            mode_ = Terminated;
+            goto done;
+        }
+    } else if (rhs == '+') {
+        if (mode_ == NoPlus)
+            out_ << ' ';
+        mode_ = NoPlus;
+    } else if (rhs == '-') {
+        if (mode_ == NoHyphen)
+            out_ << ' ';
+        mode_ = NoHyphen;
+    } else if (WordEndRange_[rhs]) {
+        if (mode_ == NoLetter)
+            out_ << ' ';
+        mode_ = NoLetter;
+    } else none:
+        mode_ = NoMode;
+
+    right_ = true;
+    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_ == NoPlus && *rhs == '+' ||
+        mode_ == NoHyphen && *rhs == '-' ||
+        mode_ == NoLetter && WordEndRange_[*rhs]
+    )
+        out_ << ' ';
+
+    if (WordEndRange_[rhs[size - 1]])
+        mode_ = NoLetter;
+    else
+        mode_ = NoMode;
 
-void CYAddressOf::Output(std::ostream &out) const {
-    out << *rhs_ << ".$()";
+    right_ = true;
+    out_ << rhs;
+    return *this;
 }
 
-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 << ":";
-    }
-    if (value_ != NULL) {
-        if (send)
-            out << ',';
-        value_->Output(out, true);
+            out << ':' << ' ';
     }
+    if (value_ != NULL)
+        value_->Output(out, CYAssign::Precedence_, CYNoFlags);
     if (next_ != NULL) {
-        if (!send)
-            if (next_->name_ != NULL)
-                out << ',';
-            else
-                out << ' ';
-        next_->Output(out, send);
+        if (next_->name_ == NULL)
+            out << ',';
+        out << ' ' << *next_;
     }
 }
 
-void CYBoolean::Output(std::ostream &out) const {
+void CYArray::Output(CYOutput &out, CYFlags flags) const {
+    out << '[' << elements_ << ']';
+}
+
+void CYArrayComprehension::Output(CYOutput &out, CYFlags flags) const {
+    out << '[' << *expression_ << ' ' << *comprehensions_ << ']';
+}
+
+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) const {
+    out << '{' << '\n';
+    ++out.indent_;
+    if (statements_ != NULL)
+        statements_->Multiple(out);
+    --out.indent_;
+    out << '\t' << '}';
+}
+
+void CYBlock::Output(CYOutput &out, CYFlags flags) const {
+    if (statements_ == NULL)
+        out.Terminate();
+    else if (statements_->next_ == NULL)
+        statements_->Single(out, flags);
+    else
+        Output(out);
+}
+
+void CYBoolean::Output(CYOutput &out, CYFlags flags) const {
     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 << ';';
 }
 
-void CYCall::Output(std::ostream &out) const {
-    out << *function_ << '(';
-    if (arguments_ != NULL)
-        arguments_->Output(out, false);
-    out << ')';
+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 << ')';
+}
+
+namespace cy {
+namespace Syntax {
+
+void Catch::Output(CYOutput &out) const {
+    out << ' ' << "catch" << ' ' << '(' << *name_ << ')' << ' ' << code_;
 }
 
-void CYCatch::Output(std::ostream &out) const {
-    out << "catch(" << *name_ << ')';
-    code_->Output(out, true);
+} }
+
+void CYComment::Output(CYOutput &out, CYFlags flags) const {
+    out << '\r';
+    out.out_ << value_;
+    out.right_ = true;
+    out << '\r';
 }
 
-void CYCondition::Output(std::ostream &out) const {
-    out << *test_ << '?';
+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 CYCondition::Output(CYOutput &out, CYFlags flags) const {
+    test_->Output(out, Precedence() - 1, CYLeft(flags));
+    out << ' ' << '?' << ' ';
     if (true_ != NULL)
-        out << *true_;
-    out << ':' << *false_;
+        true_->Output(out, CYAssign::Precedence_, CYNoFlags);
+    out << ' ' << ':' << ' ';
+    false_->Output(out, CYAssign::Precedence_, 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 << ';';
 }
 
-void CYClause::Output(std::ostream &out) const {
+void CYClause::Output(CYOutput &out) const {
     if (case_ != NULL)
-        out << "case" << *case_;
+        out << "case" << ' ' << *case_;
     else
         out << "default";
-    out << ':';
-    if (code_ != NULL)
-        code_->Output(out, false);
-    out << *next_;
+    out << ':' << '\n';
+    if (statements_ != NULL)
+        statements_->Multiple(out);
+    out << next_;
 }
 
-void CYDeclaration::Part(std::ostream &out) const {
-    out << "var ";
-    Output(out);
+void CYDebugger::Output(CYOutput &out, CYFlags flags) const {
+    out << "debugger" << ';';
 }
 
-void CYDeclaration::Output(std::ostream &out) const {
+void CYDeclaration::ForIn(CYOutput &out, CYFlags flags) const {
+    out << "var";
+    Output(out, CYRight(flags));
+}
+
+void CYDeclaration::Output(CYOutput &out, CYFlags flags) const {
     out << *identifier_;
-    if (initialiser_ != NULL)
-        out << '=' << *initialiser_;
+    //out.out_ << ':' << identifier_->usage_ << '#' << identifier_->offset_;
+    if (initialiser_ != NULL) {
+        out << ' ' << '=' << ' ';
+        initialiser_->Output(out, CYAssign::Precedence_, CYRight(flags));
+    }
+}
+
+void CYForDeclarations::Output(CYOutput &out, CYFlags flags) const {
+    out << "var";
+    Output(out, CYRight(flags));
+}
+
+void CYDeclarations::Output(CYOutput &out) const {
+    Output(out, CYNoFlags);
 }
 
-void CYDeclarations::Part(std::ostream &out) const {
-    out << "var ";
+void CYDeclarations::Output(CYOutput &out, CYFlags flags) const {
     const CYDeclarations *declaration(this);
-    do {
-        out << *declaration->declaration_;
-        declaration = declaration->next_;
-    } while (declaration != NULL);
+    bool first(true);
+
+    for (;;) {
+        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)
+            break;
+
+        out << ',' << ' ';
+        declaration = next;
+    }
 }
 
-void CYDeclarations::Output(std::ostream &out) const {
-    Part(out);
-    out << ';';
+void CYDirectMember::Output(CYOutput &out, CYFlags flags) const {
+    object_->Output(out, Precedence(), CYLeft(flags) | CYNoInteger);
+    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, bool raw) const {
-    if (!raw)
-        out << '[';
+void CYElement::Output(CYOutput &out) const {
     if (value_ != NULL)
-        value_->Output(out, true);
-    if (next_ != NULL) {
+        value_->Output(out, CYAssign::Precedence_, CYNoFlags);
+    if (next_ != NULL || value_ == NULL) {
         out << ',';
-        next_->Output(out, true);
+        if (next_ != NULL && next_->value_ != NULL)
+            out << ' ';
     }
-    if (!raw)
-        out << ']';
+    if (next_ != NULL)
+        next_->Output(out);
 }
 
-void CYElement::Output(std::ostream &out) const {
-    Output(out, false);
+void CYEmpty::Output(CYOutput &out, CYFlags flags) const {
+    out.Terminate();
 }
 
-void CYEmpty::Output(std::ostream &out) const {
+void CYExpress::Output(CYOutput &out, CYFlags flags) const {
+    expression_->Output(out, flags | CYNoBF);
     out << ';';
 }
 
-void CYEmpty::Output(std::ostream &out, bool block) const {
-    if (next_ != NULL)
-        CYSource::Output(out, block);
-    else
-        out << "{}";
+void CYExpression::ClassName(CYOutput &out, bool object) const {
+    Output(out, CYAssign::Precedence_, CYNoFlags);
 }
 
-void CYExpress::Output(std::ostream &out) const {
-    expression_->Output(out, true);
-    out << ';';
+void CYExpression::ForIn(CYOutput &out, CYFlags flags) const {
+    Output(out, flags | CYNoRightHand);
 }
 
-void CYExpression::Part(std::ostream &out) const {
-    Output(out, true);
+void CYExpression::Output(CYOutput &out) const {
+    Output(out, CYNoFlags);
 }
 
-void CYExpression::Output(std::ostream &out, bool raw) const {
-    if (!raw)
-        out << '(';
-    Output(out);
-    if (next_ != NULL) {
-        out << ',';
-        next_->Output(out, true);
-    }
-    if (!raw)
-        out << ')';
+void CYExpression::Output(CYOutput &out, unsigned precedence, CYFlags flags) const {
+    if (precedence < Precedence() || (flags & CYNoRightHand) != 0 && RightHand())
+        out << '(' << *this << ')';
+    else
+        Output(out, flags);
 }
 
-void CYFor::Output(std::ostream &out) const {
-    out << "for(";
+void CYFatArrow::Output(CYOutput &out, CYFlags flags) const {
+    out << '(' << parameters_ << ')' << ' ' << "=>" << ' ' << code_;
+}
+
+void CYFinally::Output(CYOutput &out) const {
+    out << ' ' << "finally" << ' ' << code_;
+}
+
+void CYFor::Output(CYOutput &out, CYFlags flags) const {
+    out << "for" << ' ' << '(';
     if (initialiser_ != NULL)
-        initialiser_->Part(out);
-    out << ';';
+        initialiser_->Output(out, CYNoIn);
+    out.Terminate();
     if (test_ != NULL)
-        test_->Output(out, true);
-    out << ';';
+        out << ' ';
+    out << test_;
+    out.Terminate();
     if (increment_ != NULL)
-        increment_->Output(out, true);
+        out << ' ';
+    out << increment_;
     out << ')';
-    code_->Output(out, false);
+    code_->Single(out, CYRight(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 CYForOf::Output(CYOutput &out, CYFlags flags) const {
+    out << "for" << ' ' << "each" << ' ' << '(';
+    initialiser_->ForIn(out, CYNoIn);
+    out << "in" << *set_ << ')';
+    code_->Single(out, CYRight(flags));
+}
+
+void CYForOfComprehension::Output(CYOutput &out) const {
+    out << "for" << ' ' << "each" << ' ' << '(' << *name_ << ' ' << "in" << ' ' << *set_ << ')' << next_;
+}
+
+void CYForIn::Output(CYOutput &out, CYFlags flags) const {
+    out << "for" << ' ' << '(';
+    if (initialiser_ != NULL)
+        initialiser_->ForIn(out, CYNoIn);
+    out << "in" << *set_ << ')';
+    code_->Single(out, CYRight(flags));
+}
+
+void CYForInComprehension::Output(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 << "function";
+    if (name_ != NULL)
+        out << ' ' << *name_;
+    out << '(' << parameters_ << ')';
+    out << ' ' << code_;
+    if (protect)
+        out << ')';
+}
+
+void CYFunctionExpression::Output(CYOutput &out, CYFlags flags) const {
+    CYFunction::Output(out, flags);
 }
 
-void CYFunction::Output(std::ostream &out) const {
-    CYLambda::Output(out);
+void CYFunctionStatement::Output(CYOutput &out, CYFlags flags) const {
+    CYFunction::Output(out, flags);
 }
 
-void CYIf::Output(std::ostream &out) const {
-    out << "if" << *test_;
-    true_->Output(out, true);
+void CYFunctionParameter::Output(CYOutput &out) const {
+    initialiser_->Output(out, CYNoFlags);
+    if (next_ != NULL)
+        out << ',' << ' ' << *next_;
+}
+
+const char *CYIdentifier::Word() const {
+    return replace_ == NULL || replace_ == this ? CYWord::Word() : replace_->Word();
+}
+
+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);
+
+    true_->Single(out, jacks);
+
     if (false_ != NULL) {
-        out << "else ";
-        false_->Output(out, false);
+        out << '\t' << "else";
+        false_->Single(out, right);
     }
+
+    if (protect)
+        out << '}';
 }
 
-void CYIndirect::Output(std::ostream &out) const {
-    out << *rhs_ << "[0]";
+void CYIfComprehension::Output(CYOutput &out) const {
+    out << "if" << ' ' << '(' << *test_ << ')' << next_;
 }
 
-void CYInfix::Output(std::ostream &out) const {
-    out << *lhs_ << Operator() << *rhs_;
+void CYIndirectMember::Output(CYOutput &out, CYFlags flags) const {
+    object_->Output(out, Precedence(), CYLeft(flags));
+    if (const char *word = property_->Word())
+        out << "->" << word;
+    else
+        out << "->" << '[' << *property_ << ']';
 }
 
-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 CYInfix::Output(CYOutput &out, CYFlags flags) const {
+    const char *name(Operator());
+    bool protect((flags & CYNoIn) != 0 && strcmp(name, "in") == 0);
+    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 CYLabel::Output(CYOutput &out, CYFlags flags) const {
+    out << *name_ << ':' << ' ';
+    statement_->Single(out, CYRight(flags));
 }
 
-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)
-                out << ':';
-        }
-    out << "\"";
-    if (arguments_ != NULL)
-        arguments_->Output(out, true);
-    out << ')';
+void CYLetStatement::Output(CYOutput &out, CYFlags flags) const {
+    out << "let" << ' ' << '(' << *declarations_ << ')';
+    code_->Single(out, CYRight(flags));
 }
 
-void CYNew::Output(std::ostream &out) const {
-    out << "new " << *constructor_ << '(';
+namespace cy {
+namespace Syntax {
+
+void New::Output(CYOutput &out, CYFlags flags) const {
+    out << "new" << ' ';
+    CYFlags jacks(CYNoCall | CYCenter(flags));
+    constructor_->Output(out, Precedence(), jacks);
     if (arguments_ != NULL)
-        arguments_->Output(out, false);
-    out << ')';
+        out << '(' << *arguments_ << ')';
 }
 
-void CYNull::Output(std::ostream &out) const {
+} }
+
+void CYNull::Output(CYOutput &out, CYFlags flags) const {
     CYWord::Output(out);
 }
 
-void CYNumber::Output(std::ostream &out) const {
-    // XXX: this is not a useful formatting
-    out << Value();
+void CYNumber::Output(CYOutput &out, CYFlags flags) const {
+    std::ostringstream str;
+    CYNumerify(str, Value());
+    std::string value(str.str());
+    out << value.c_str();
+    // XXX: this should probably also handle hex conversions and exponents
+    if ((flags & CYNoInteger) != 0 && value.find('.') == std::string::npos)
+        out << '.';
 }
 
-void CYObject::Output(std::ostream &out) const {
-    out << '{';
-    if (property_ != NULL)
-        property_->Output(out);
-    out << '}';
+void CYNumber::PropertyName(CYOutput &out) const {
+    Output(out, CYNoFlags);
 }
 
-void CYParameter::Output(std::ostream &out) const {
-    out << *name_;
-    if (next_ != NULL) {
-        out << ',';
-        out << *next_;
-    }
+void CYObject::Output(CYOutput &out, CYFlags flags) const {
+    bool protect((flags & CYNoBrace) != 0);
+    if (protect)
+        out << '(';
+    out << '{' << '\n';
+    ++out.indent_;
+    out << properties_;
+    --out.indent_;
+    out << '\t' << '}';
+    if (protect)
+        out << ')';
 }
 
-void CYPostfix::Output(std::ostream &out) const {
-    out << *lhs_ << Operator();
+void CYPostfix::Output(CYOutput &out, CYFlags flags) const {
+    lhs_->Output(out, Precedence(), CYLeft(flags));
+    out << Operator();
 }
 
-void CYPrefix::Output(std::ostream &out) const {
-    out << Operator() << *rhs_;
+void CYPrefix::Output(CYOutput &out, CYFlags flags) const {
+    const char *name(Operator());
+    out << name;
+    if (Alphabetic())
+        out << ' ';
+    rhs_->Output(out, Precedence(), CYRight(flags));
 }
 
-void CYProperty::Output(std::ostream &out) const {
-    out << *name_ << ':' << *value_;
-    if (next_ != NULL) {
-        out << ',';
-        next_->Output(out);
-    }
+void CYProgram::Output(CYOutput &out) const {
+    if (statements_ != NULL)
+        statements_->Multiple(out);
+}
+
+void CYProperty::Output(CYOutput &out) const {
+    out << '\t';
+    name_->PropertyName(out);
+    out << ':' << ' ';
+    value_->Output(out, CYAssign::Precedence_, CYNoFlags);
+    if (next_ != NULL)
+        out << ',' << '\n' << *next_;
+    else
+        out << '\n';
+}
+
+void CYRegEx::Output(CYOutput &out, CYFlags flags) const {
+    out << Value();
 }
 
-void CYReturn::Output(std::ostream &out) const {
+void CYReturn::Output(CYOutput &out, CYFlags flags) const {
     out << "return";
     if (value_ != NULL)
         out << ' ' << *value_;
     out << ';';
 }
 
-void CYSelector::Output(std::ostream &out) const {
-    out << '"';
-    out << "<unimplemented>";
-    out << '"';
+void CYRubyBlock::Output(CYOutput &out, CYFlags flags) const {
+    call_->Output(out, CYLeft(flags));
+    out << ' ';
+    proc_->Output(out, CYRight(flags));
 }
 
-void CYSource::Show(std::ostream &out) const {
-    for (const CYSource *next(this); next != NULL; next = next->next_)
-        next->Output(out);
+void CYRubyProc::Output(CYOutput &out, CYFlags flags) const {
+    // XXX: this is not outputting the parameters
+    out << code_;
 }
 
-void CYSource::Output(std::ostream &out, bool block) const {
-    if (!block && next_ == NULL)
-        Output(out);
-    else {
-        out << '{';
-        Show(out);
-        out << '}';
+void CYStatement::Multiple(CYOutput &out, CYFlags flags) const {
+    bool first(true);
+    CYForEach (next, this) {
+        bool last(next->next_ == NULL);
+        CYFlags jacks(first ? last ? flags : CYLeft(flags) : last ? CYRight(flags) : CYCenter(flags));
+        first = false;
+        out << '\t';
+        next->Output(out, jacks);
+        out << '\n';
     }
 }
 
-void CYString::Output(std::ostream &out) const {
-    out << '\"';
-    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;
-
-            default:
-                if (*value < 0x20 || *value >= 0x7f)
-                    out << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << unsigned(*value);
-                else
-                    out << *value;
-        }
-    out << '\"';
+void CYStatement::Single(CYOutput &out, CYFlags flags) const {
+    if (this == NULL)
+        return out.Terminate();
+
+    _assert(next_ == NULL);
+    out << '\n';
+    ++out.indent_;
+    out << '\t';
+    Output(out, flags);
+    out << '\n';
+    --out.indent_;
 }
 
-void CYSwitch::Output(std::ostream &out) const {
-    out << "switch" << *value_ << '{';
-    if (clauses_ != NULL)
-        out << *clauses_;
+void CYString::Output(CYOutput &out, CYFlags flags) const {
+    std::ostringstream str;
+    CYStringify(str, value_, size_);
+    out << str.str().c_str();
+}
+
+void CYString::PropertyName(CYOutput &out) const {
+    if (const char *word = Word())
+        out << word;
+    else
+        out << *this;
+}
+
+static const char *Reserved_[] = {
+    "false", "null", "true",
+
+    "break", "case", "catch", "continue", "default",
+    "delete", "do", "else", "finally", "for", "function",
+    "if", "in", "instanceof", "new", "return", "switch",
+    "this", "throw", "try", "typeof", "var", "void",
+    "while", "with",
+
+    "debugger", "const",
+
+    "class", "enum", "export", "extends", "import", "super",
+
+    "abstract", "boolean", "byte", "char", "double", "final",
+    "float", "goto", "int", "long", "native", "short",
+    "synchronized", "throws", "transient", "volatile",
+
+    "let", "yield",
+
+    NULL
+};
+
+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());
+    for (const char **reserved(Reserved_); *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 << '}';
 }
 
-void CYThis::Output(std::ostream &out) const {
+void CYThis::Output(CYOutput &out, CYFlags flags) const {
     CYWord::Output(out);
 }
 
-void CYThrow::Output(std::ostream &out) const {
-    out << "return";
+namespace cy {
+namespace Syntax {
+
+void Throw::Output(CYOutput &out, CYFlags flags) const {
+    out << "throw";
     if (value_ != NULL)
         out << ' ' << *value_;
     out << ';';
 }
 
-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 Try::Output(CYOutput &out, CYFlags flags) const {
+    out << "try" << ' ' << code_ << catch_ << 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_;
 }
 
-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 {
-    out << Value();
+void CYWord::ClassName(CYOutput &out, bool object) const {
+    if (object)
+        out << "objc_getClass(";
+    out << '"' << Word() << '"';
+    if (object)
+        out << ')';
+}
+
+void CYWord::Output(CYOutput &out) const {
+    out << Word();
+    if (out.options_.verbose_)
+        out.out_ << '@' << this;
+}
+
+void CYWord::PropertyName(CYOutput &out) const {
+    Output(out);
+}
+
+const char *CYWord::Word() const {
+    return word_;
 }