jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/tree/Pretty.java@ca49d50318dc (annotated)

src/share/classes/com/sun/tools/javac/tree/Pretty.java@ca49d50318dc (annotated)

src/share/classes/com/sun/tools/javac/tree/Pretty.java

Tue, 08 Nov 2011 11:51:05 -0800

author: jjg
date: Tue, 08 Nov 2011 11:51:05 -0800
changeset 1127: ca49d50318dc
parent 969: 8cc5b440fdde
child 1142: c896d95e7469
permissions: -rw-r--r--

6921494: provide way to print javac tree tag values
Reviewed-by: jjg, mcimadamore
Contributed-by: vicenterz@yahoo.es

 /*
  * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code 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
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.tools.javac.tree;
 import java.io.*;
 import java.util.*;
 import com.sun.tools.javac.util.*;
 import com.sun.tools.javac.util.List;
 import com.sun.tools.javac.code.*;
 import com.sun.tools.javac.code.Symbol.*;
 import com.sun.tools.javac.tree.JCTree.*;
 import static com.sun.tools.javac.code.Flags.*;
 import static com.sun.tools.javac.code.Flags.ANNOTATION;
 import static com.sun.tools.javac.tree.JCTree.Tag.*;
 /** Prints out a tree as an indented Java source program.
  *
  *  <p><b>This is NOT part of any supported API.
  *  If you write code that depends on this, you do so at your own risk.
  *  This code and its internal interfaces are subject to change or
  *  deletion without notice.</b>
  */
 public class Pretty extends JCTree.Visitor {
     public Pretty(Writer out, boolean sourceOutput) {
         this.out = out;
         this.sourceOutput = sourceOutput;
     }
     /** Set when we are producing source output.  If we're not
      *  producing source output, we can sometimes give more detail in
      *  the output even though that detail would not be valid java
      *  source.
      */
     private final boolean sourceOutput;
     /** The output stream on which trees are printed.
      */
     Writer out;
     /** Indentation width (can be reassigned from outside).
      */
     public int width = 4;
     /** The current left margin.
      */
     int lmargin = 0;
     /** The enclosing class name.
      */
     Name enclClassName;
     /** A hashtable mapping trees to their documentation comments
      *  (can be null)
      */
     Map<JCTree, String> docComments = null;
     /** Align code to be indented to left margin.
      */
     void align() throws IOException {
         for (int i = 0; i < lmargin; i++) out.write(" ");
     }
     /** Increase left margin by indentation width.
      */
     void indent() {
         lmargin = lmargin + width;
     }
     /** Decrease left margin by indentation width.
      */
     void undent() {
         lmargin = lmargin - width;
     }
     /** Enter a new precedence level. Emit a `(' if new precedence level
      *  is less than precedence level so far.
      *  @param contextPrec    The precedence level in force so far.
      *  @param ownPrec        The new precedence level.
      */
     void open(int contextPrec, int ownPrec) throws IOException {
         if (ownPrec < contextPrec) out.write("(");
     }
     /** Leave precedence level. Emit a `(' if inner precedence level
      *  is less than precedence level we revert to.
      *  @param contextPrec    The precedence level we revert to.
      *  @param ownPrec        The inner precedence level.
      */
     void close(int contextPrec, int ownPrec) throws IOException {
         if (ownPrec < contextPrec) out.write(")");
     }
     /** Print string, replacing all non-ascii character with unicode escapes.
      */
     public void print(Object s) throws IOException {
         out.write(Convert.escapeUnicode(s.toString()));
     }
     /** Print new line.
      */
     public void println() throws IOException {
         out.write(lineSep);
     }
     String lineSep = System.getProperty("line.separator");
     /**************************************************************************
      * Traversal methods
      *************************************************************************/
     /** Exception to propogate IOException through visitXXX methods */
     private static class UncheckedIOException extends Error {
         static final long serialVersionUID = -4032692679158424751L;
         UncheckedIOException(IOException e) {
             super(e.getMessage(), e);
         }
     }
     /** Visitor argument: the current precedence level.
      */
     int prec;
     /** Visitor method: print expression tree.
      *  @param prec  The current precedence level.
      */
     public void printExpr(JCTree tree, int prec) throws IOException {
         int prevPrec = this.prec;
         try {
             this.prec = prec;
             if (tree == null) print("/*missing*/");
             else {
                 tree.accept(this);
             }
         } catch (UncheckedIOException ex) {
             IOException e = new IOException(ex.getMessage());
             e.initCause(ex);
             throw e;
         } finally {
             this.prec = prevPrec;
         }
     }
     /** Derived visitor method: print expression tree at minimum precedence level
      *  for expression.
      */
     public void printExpr(JCTree tree) throws IOException {
         printExpr(tree, TreeInfo.noPrec);
     }
     /** Derived visitor method: print statement tree.
      */
     public void printStat(JCTree tree) throws IOException {
         printExpr(tree, TreeInfo.notExpression);
     }
     /** Derived visitor method: print list of expression trees, separated by given string.
      *  @param sep the separator string
      */
     public <T extends JCTree> void printExprs(List<T> trees, String sep) throws IOException {
         if (trees.nonEmpty()) {
             printExpr(trees.head);
             for (List<T> l = trees.tail; l.nonEmpty(); l = l.tail) {
                 print(sep);
                 printExpr(l.head);
             }
         }
     }
     /** Derived visitor method: print list of expression trees, separated by commas.
      */
     public <T extends JCTree> void printExprs(List<T> trees) throws IOException {
         printExprs(trees, ", ");
     }
     /** Derived visitor method: print list of statements, each on a separate line.
      */
     public void printStats(List<? extends JCTree> trees) throws IOException {
         for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail) {
             align();
             printStat(l.head);
             println();
         }
     }
     /** Print a set of modifiers.
      */
     public void printFlags(long flags) throws IOException {
         if ((flags & SYNTHETIC) != 0) print("/*synthetic*/ ");
         print(TreeInfo.flagNames(flags));
         if ((flags & StandardFlags) != 0) print(" ");
         if ((flags & ANNOTATION) != 0) print("@");
     }
     public void printAnnotations(List<JCAnnotation> trees) throws IOException {
         for (List<JCAnnotation> l = trees; l.nonEmpty(); l = l.tail) {
             printStat(l.head);
             println();
             align();
         }
     }
     /** Print documentation comment, if it exists
      *  @param tree    The tree for which a documentation comment should be printed.
      */
     public void printDocComment(JCTree tree) throws IOException {
         if (docComments != null) {
             String dc = docComments.get(tree);
             if (dc != null) {
                 print("/**"); println();
                 int pos = 0;
                 int endpos = lineEndPos(dc, pos);
                 while (pos < dc.length()) {
                     align();
                     print(" *");
                     if (pos < dc.length() && dc.charAt(pos) > ' ') print(" ");
                     print(dc.substring(pos, endpos)); println();
                     pos = endpos + 1;
                     endpos = lineEndPos(dc, pos);
                 }
                 align(); print(" */"); println();
                 align();
             }
         }
     }
 //where
     static int lineEndPos(String s, int start) {
         int pos = s.indexOf('\n', start);
         if (pos < 0) pos = s.length();
         return pos;
     }
     /** If type parameter list is non-empty, print it enclosed in "<...>" brackets.
      */
     public void printTypeParameters(List<JCTypeParameter> trees) throws IOException {
         if (trees.nonEmpty()) {
             print("<");
             printExprs(trees);
             print(">");
         }
     }
     /** Print a block.
      */
     public void printBlock(List<? extends JCTree> stats) throws IOException {
         print("{");
         println();
         indent();
         printStats(stats);
         undent();
         align();
         print("}");
     }
     /** Print a block.
      */
     public void printEnumBody(List<JCTree> stats) throws IOException {
         print("{");
         println();
         indent();
         boolean first = true;
         for (List<JCTree> l = stats; l.nonEmpty(); l = l.tail) {
             if (isEnumerator(l.head)) {
                 if (!first) {
                     print(",");
                     println();
                 }
                 align();
                 printStat(l.head);
                 first = false;
             }
         }
         print(";");
         println();
         for (List<JCTree> l = stats; l.nonEmpty(); l = l.tail) {
             if (!isEnumerator(l.head)) {
                 align();
                 printStat(l.head);
                 println();
             }
         }
         undent();
         align();
         print("}");
     }
     /** Is the given tree an enumerator definition? */
     boolean isEnumerator(JCTree t) {
         return t.hasTag(VARDEF) && (((JCVariableDecl) t).mods.flags & ENUM) != 0;
     }
     /** Print unit consisting of package clause and import statements in toplevel,
      *  followed by class definition. if class definition == null,
      *  print all definitions in toplevel.
      *  @param tree     The toplevel tree
      *  @param cdef     The class definition, which is assumed to be part of the
      *                  toplevel tree.
      */
     public void printUnit(JCCompilationUnit tree, JCClassDecl cdef) throws IOException {
         docComments = tree.docComments;
         printDocComment(tree);
         if (tree.pid != null) {
             print("package ");
             printExpr(tree.pid);
             print(";");
             println();
         }
         boolean firstImport = true;
         for (List<JCTree> l = tree.defs;
         l.nonEmpty() && (cdef == null || l.head.hasTag(IMPORT));
         l = l.tail) {
             if (l.head.hasTag(IMPORT)) {
                 JCImport imp = (JCImport)l.head;
                 Name name = TreeInfo.name(imp.qualid);
                 if (name == name.table.names.asterisk ||
                         cdef == null ||
                         isUsed(TreeInfo.symbol(imp.qualid), cdef)) {
                     if (firstImport) {
                         firstImport = false;
                         println();
                     }
                     printStat(imp);
                 }
             } else {
                 printStat(l.head);
             }
         }
         if (cdef != null) {
             printStat(cdef);
             println();
         }
     }
     // where
     boolean isUsed(final Symbol t, JCTree cdef) {
         class UsedVisitor extends TreeScanner {
             public void scan(JCTree tree) {
                 if (tree!=null && !result) tree.accept(this);
             }
             boolean result = false;
             public void visitIdent(JCIdent tree) {
                 if (tree.sym == t) result = true;
             }
         }
         UsedVisitor v = new UsedVisitor();
         v.scan(cdef);
         return v.result;
     }
     /**************************************************************************
      * Visitor methods
      *************************************************************************/
     public void visitTopLevel(JCCompilationUnit tree) {
         try {
             printUnit(tree, null);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitImport(JCImport tree) {
         try {
             print("import ");
             if (tree.staticImport) print("static ");
             printExpr(tree.qualid);
             print(";");
             println();
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitClassDef(JCClassDecl tree) {
         try {
             println(); align();
             printDocComment(tree);
             printAnnotations(tree.mods.annotations);
             printFlags(tree.mods.flags & ~INTERFACE);
             Name enclClassNamePrev = enclClassName;
             enclClassName = tree.name;
             if ((tree.mods.flags & INTERFACE) != 0) {
                 print("interface " + tree.name);
                 printTypeParameters(tree.typarams);
                 if (tree.implementing.nonEmpty()) {
                     print(" extends ");
                     printExprs(tree.implementing);
                 }
             } else {
                 if ((tree.mods.flags & ENUM) != 0)
                     print("enum " + tree.name);
                 else
                     print("class " + tree.name);
                 printTypeParameters(tree.typarams);
                 if (tree.extending != null) {
                     print(" extends ");
                     printExpr(tree.extending);
                 }
                 if (tree.implementing.nonEmpty()) {
                     print(" implements ");
                     printExprs(tree.implementing);
                 }
             }
             print(" ");
             if ((tree.mods.flags & ENUM) != 0) {
                 printEnumBody(tree.defs);
             } else {
                 printBlock(tree.defs);
             }
             enclClassName = enclClassNamePrev;
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitMethodDef(JCMethodDecl tree) {
         try {
             // when producing source output, omit anonymous constructors
             if (tree.name == tree.name.table.names.init &&
                     enclClassName == null &&
                     sourceOutput) return;
             println(); align();
             printDocComment(tree);
             printExpr(tree.mods);
             printTypeParameters(tree.typarams);
             if (tree.name == tree.name.table.names.init) {
                 print(enclClassName != null ? enclClassName : tree.name);
             } else {
                 printExpr(tree.restype);
                 print(" " + tree.name);
             }
             print("(");
             printExprs(tree.params);
             print(")");
             if (tree.thrown.nonEmpty()) {
                 print(" throws ");
                 printExprs(tree.thrown);
             }
             if (tree.defaultValue != null) {
                 print(" default ");
                 printExpr(tree.defaultValue);
             }
             if (tree.body != null) {
                 print(" ");
                 printStat(tree.body);
             } else {
                 print(";");
             }
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitVarDef(JCVariableDecl tree) {
         try {
             if (docComments != null && docComments.get(tree) != null) {
                 println(); align();
             }
             printDocComment(tree);
             if ((tree.mods.flags & ENUM) != 0) {
                 print("/*public static final*/ ");
                 print(tree.name);
                 if (tree.init != null) {
                     if (sourceOutput && tree.init.hasTag(NEWCLASS)) {
                         print(" /*enum*/ ");
                         JCNewClass init = (JCNewClass) tree.init;
                         if (init.args != null && init.args.nonEmpty()) {
                             print("(");
                             print(init.args);
                             print(")");
                         }
                         if (init.def != null && init.def.defs != null) {
                             print(" ");
                             printBlock(init.def.defs);
                         }
                         return;
                     }
                     print(" /* = ");
                     printExpr(tree.init);
                     print(" */");
                 }
             } else {
                 printExpr(tree.mods);
                 if ((tree.mods.flags & VARARGS) != 0) {
                     printExpr(((JCArrayTypeTree) tree.vartype).elemtype);
                     print("... " + tree.name);
                 } else {
                     printExpr(tree.vartype);
                     print(" " + tree.name);
                 }
                 if (tree.init != null) {
                     print(" = ");
                     printExpr(tree.init);
                 }
                 if (prec == TreeInfo.notExpression) print(";");
             }
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitSkip(JCSkip tree) {
         try {
             print(";");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitBlock(JCBlock tree) {
         try {
             printFlags(tree.flags);
             printBlock(tree.stats);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitDoLoop(JCDoWhileLoop tree) {
         try {
             print("do ");
             printStat(tree.body);
             align();
             print(" while ");
             if (tree.cond.hasTag(PARENS)) {
                 printExpr(tree.cond);
             } else {
                 print("(");
                 printExpr(tree.cond);
                 print(")");
             }
             print(";");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitWhileLoop(JCWhileLoop tree) {
         try {
             print("while ");
             if (tree.cond.hasTag(PARENS)) {
                 printExpr(tree.cond);
             } else {
                 print("(");
                 printExpr(tree.cond);
                 print(")");
             }
             print(" ");
             printStat(tree.body);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitForLoop(JCForLoop tree) {
         try {
             print("for (");
             if (tree.init.nonEmpty()) {
                 if (tree.init.head.hasTag(VARDEF)) {
                     printExpr(tree.init.head);
                     for (List<JCStatement> l = tree.init.tail; l.nonEmpty(); l = l.tail) {
                         JCVariableDecl vdef = (JCVariableDecl)l.head;
                         print(", " + vdef.name + " = ");
                         printExpr(vdef.init);
                     }
                 } else {
                     printExprs(tree.init);
                 }
             }
             print("; ");
             if (tree.cond != null) printExpr(tree.cond);
             print("; ");
             printExprs(tree.step);
             print(") ");
             printStat(tree.body);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitForeachLoop(JCEnhancedForLoop tree) {
         try {
             print("for (");
             printExpr(tree.var);
             print(" : ");
             printExpr(tree.expr);
             print(") ");
             printStat(tree.body);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitLabelled(JCLabeledStatement tree) {
         try {
             print(tree.label + ": ");
             printStat(tree.body);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitSwitch(JCSwitch tree) {
         try {
             print("switch ");
             if (tree.selector.hasTag(PARENS)) {
                 printExpr(tree.selector);
             } else {
                 print("(");
                 printExpr(tree.selector);
                 print(")");
             }
             print(" {");
             println();
             printStats(tree.cases);
             align();
             print("}");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitCase(JCCase tree) {
         try {
             if (tree.pat == null) {
                 print("default");
             } else {
                 print("case ");
                 printExpr(tree.pat);
             }
             print(": ");
             println();
             indent();
             printStats(tree.stats);
             undent();
             align();
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitSynchronized(JCSynchronized tree) {
         try {
             print("synchronized ");
             if (tree.lock.hasTag(PARENS)) {
                 printExpr(tree.lock);
             } else {
                 print("(");
                 printExpr(tree.lock);
                 print(")");
             }
             print(" ");
             printStat(tree.body);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitTry(JCTry tree) {
         try {
             print("try ");
             if (tree.resources.nonEmpty()) {
                 print("(");
                 boolean first = true;
                 for (JCTree var : tree.resources) {
                     if (!first) {
                         println();
                         indent();
                     }
                     printStat(var);
                     first = false;
                 }
                 print(") ");
             }
             printStat(tree.body);
             for (List<JCCatch> l = tree.catchers; l.nonEmpty(); l = l.tail) {
                 printStat(l.head);
             }
             if (tree.finalizer != null) {
                 print(" finally ");
                 printStat(tree.finalizer);
             }
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitCatch(JCCatch tree) {
         try {
             print(" catch (");
             printExpr(tree.param);
             print(") ");
             printStat(tree.body);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitConditional(JCConditional tree) {
         try {
             open(prec, TreeInfo.condPrec);
             printExpr(tree.cond, TreeInfo.condPrec);
             print(" ? ");
             printExpr(tree.truepart, TreeInfo.condPrec);
             print(" : ");
             printExpr(tree.falsepart, TreeInfo.condPrec);
             close(prec, TreeInfo.condPrec);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitIf(JCIf tree) {
         try {
             print("if ");
             if (tree.cond.hasTag(PARENS)) {
                 printExpr(tree.cond);
             } else {
                 print("(");
                 printExpr(tree.cond);
                 print(")");
             }
             print(" ");
             printStat(tree.thenpart);
             if (tree.elsepart != null) {
                 print(" else ");
                 printStat(tree.elsepart);
             }
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitExec(JCExpressionStatement tree) {
         try {
             printExpr(tree.expr);
             if (prec == TreeInfo.notExpression) print(";");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitBreak(JCBreak tree) {
         try {
             print("break");
             if (tree.label != null) print(" " + tree.label);
             print(";");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitContinue(JCContinue tree) {
         try {
             print("continue");
             if (tree.label != null) print(" " + tree.label);
             print(";");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitReturn(JCReturn tree) {
         try {
             print("return");
             if (tree.expr != null) {
                 print(" ");
                 printExpr(tree.expr);
             }
             print(";");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitThrow(JCThrow tree) {
         try {
             print("throw ");
             printExpr(tree.expr);
             print(";");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitAssert(JCAssert tree) {
         try {
             print("assert ");
             printExpr(tree.cond);
             if (tree.detail != null) {
                 print(" : ");
                 printExpr(tree.detail);
             }
             print(";");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitApply(JCMethodInvocation tree) {
         try {
             if (!tree.typeargs.isEmpty()) {
                 if (tree.meth.hasTag(SELECT)) {
                     JCFieldAccess left = (JCFieldAccess)tree.meth;
                     printExpr(left.selected);
                     print(".<");
                     printExprs(tree.typeargs);
                     print(">" + left.name);
                 } else {
                     print("<");
                     printExprs(tree.typeargs);
                     print(">");
                     printExpr(tree.meth);
                 }
             } else {
                 printExpr(tree.meth);
             }
             print("(");
             printExprs(tree.args);
             print(")");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitNewClass(JCNewClass tree) {
         try {
             if (tree.encl != null) {
                 printExpr(tree.encl);
                 print(".");
             }
             print("new ");
             if (!tree.typeargs.isEmpty()) {
                 print("<");
                 printExprs(tree.typeargs);
                 print(">");
             }
             printExpr(tree.clazz);
             print("(");
             printExprs(tree.args);
             print(")");
             if (tree.def != null) {
                 Name enclClassNamePrev = enclClassName;
                 enclClassName =
                         tree.def.name != null ? tree.def.name :
                             tree.type != null && tree.type.tsym.name != tree.type.tsym.name.table.names.empty
                                 ? tree.type.tsym.name : null;
                 if ((tree.def.mods.flags & Flags.ENUM) != 0) print("/*enum*/");
                 printBlock(tree.def.defs);
                 enclClassName = enclClassNamePrev;
             }
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitNewArray(JCNewArray tree) {
         try {
             if (tree.elemtype != null) {
                 print("new ");
                 JCTree elem = tree.elemtype;
                 if (elem.hasTag(TYPEARRAY))
                     printBaseElementType((JCArrayTypeTree) elem);
                 else
                     printExpr(elem);
                 for (List<JCExpression> l = tree.dims; l.nonEmpty(); l = l.tail) {
                     print("[");
                     printExpr(l.head);
                     print("]");
                 }
                 if (elem instanceof JCArrayTypeTree)
                     printBrackets((JCArrayTypeTree) elem);
             }
             if (tree.elems != null) {
                 if (tree.elemtype != null) print("[]");
                 print("{");
                 printExprs(tree.elems);
                 print("}");
             }
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitParens(JCParens tree) {
         try {
             print("(");
             printExpr(tree.expr);
             print(")");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitAssign(JCAssign tree) {
         try {
             open(prec, TreeInfo.assignPrec);
             printExpr(tree.lhs, TreeInfo.assignPrec + 1);
             print(" = ");
             printExpr(tree.rhs, TreeInfo.assignPrec);
             close(prec, TreeInfo.assignPrec);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public String operatorName(JCTree.Tag tag) {
         switch(tag) {
             case POS:     return "+";
             case NEG:     return "-";
             case NOT:     return "!";
             case COMPL:   return "~";
             case PREINC:  return "++";
             case PREDEC:  return "--";
             case POSTINC: return "++";
             case POSTDEC: return "--";
             case NULLCHK: return "<*nullchk*>";
             case OR:      return "||";
             case AND:     return "&&";
             case EQ:      return "==";
             case NE:      return "!=";
             case LT:      return "<";
             case GT:      return ">";
             case LE:      return "<=";
             case GE:      return ">=";
             case BITOR:   return "|";
             case BITXOR:  return "^";
             case BITAND:  return "&";
             case SL:      return "<<";
             case SR:      return ">>";
             case USR:     return ">>>";
             case PLUS:    return "+";
             case MINUS:   return "-";
             case MUL:     return "*";
             case DIV:     return "/";
             case MOD:     return "%";
             default: throw new Error();
         }
     }
     public void visitAssignop(JCAssignOp tree) {
         try {
             open(prec, TreeInfo.assignopPrec);
             printExpr(tree.lhs, TreeInfo.assignopPrec + 1);
             print(" " + operatorName(tree.getTag().noAssignOp()) + "= ");
             printExpr(tree.rhs, TreeInfo.assignopPrec);
             close(prec, TreeInfo.assignopPrec);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitUnary(JCUnary tree) {
         try {
             int ownprec = TreeInfo.opPrec(tree.getTag());
             String opname = operatorName(tree.getTag());
             open(prec, ownprec);
             if (!tree.getTag().isPostUnaryOp()) {
                 print(opname);
                 printExpr(tree.arg, ownprec);
             } else {
                 printExpr(tree.arg, ownprec);
                 print(opname);
             }
             close(prec, ownprec);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitBinary(JCBinary tree) {
         try {
             int ownprec = TreeInfo.opPrec(tree.getTag());
             String opname = operatorName(tree.getTag());
             open(prec, ownprec);
             printExpr(tree.lhs, ownprec);
             print(" " + opname + " ");
             printExpr(tree.rhs, ownprec + 1);
             close(prec, ownprec);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitTypeCast(JCTypeCast tree) {
         try {
             open(prec, TreeInfo.prefixPrec);
             print("(");
             printExpr(tree.clazz);
             print(")");
             printExpr(tree.expr, TreeInfo.prefixPrec);
             close(prec, TreeInfo.prefixPrec);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitTypeTest(JCInstanceOf tree) {
         try {
             open(prec, TreeInfo.ordPrec);
             printExpr(tree.expr, TreeInfo.ordPrec);
             print(" instanceof ");
             printExpr(tree.clazz, TreeInfo.ordPrec + 1);
             close(prec, TreeInfo.ordPrec);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitIndexed(JCArrayAccess tree) {
         try {
             printExpr(tree.indexed, TreeInfo.postfixPrec);
             print("[");
             printExpr(tree.index);
             print("]");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitSelect(JCFieldAccess tree) {
         try {
             printExpr(tree.selected, TreeInfo.postfixPrec);
             print("." + tree.name);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitIdent(JCIdent tree) {
         try {
             print(tree.name);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitLiteral(JCLiteral tree) {
         try {
             switch (tree.typetag) {
                 case TypeTags.INT:
                     print(tree.value.toString());
                     break;
                 case TypeTags.LONG:
                     print(tree.value + "L");
                     break;
                 case TypeTags.FLOAT:
                     print(tree.value + "F");
                     break;
                 case TypeTags.DOUBLE:
                     print(tree.value.toString());
                     break;
                 case TypeTags.CHAR:
                     print("\'" +
                             Convert.quote(
                             String.valueOf((char)((Number)tree.value).intValue())) +
                             "\'");
                     break;
                 case TypeTags.BOOLEAN:
                     print(((Number)tree.value).intValue() == 1 ? "true" : "false");
                     break;
                 case TypeTags.BOT:
                     print("null");
                     break;
                 default:
                     print("\"" + Convert.quote(tree.value.toString()) + "\"");
                     break;
             }
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitTypeIdent(JCPrimitiveTypeTree tree) {
         try {
             switch(tree.typetag) {
                 case TypeTags.BYTE:
                     print("byte");
                     break;
                 case TypeTags.CHAR:
                     print("char");
                     break;
                 case TypeTags.SHORT:
                     print("short");
                     break;
                 case TypeTags.INT:
                     print("int");
                     break;
                 case TypeTags.LONG:
                     print("long");
                     break;
                 case TypeTags.FLOAT:
                     print("float");
                     break;
                 case TypeTags.DOUBLE:
                     print("double");
                     break;
                 case TypeTags.BOOLEAN:
                     print("boolean");
                     break;
                 case TypeTags.VOID:
                     print("void");
                     break;
                 default:
                     print("error");
                     break;
             }
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitTypeArray(JCArrayTypeTree tree) {
         try {
             printBaseElementType(tree);
             printBrackets(tree);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     // Prints the inner element type of a nested array
     private void printBaseElementType(JCTree tree) throws IOException {
         printExpr(TreeInfo.innermostType(tree));
     }
     // prints the brackets of a nested array in reverse order
     private void printBrackets(JCArrayTypeTree tree) throws IOException {
         JCTree elem;
         while (true) {
             elem = tree.elemtype;
             print("[]");
             if (!elem.hasTag(TYPEARRAY)) break;
             tree = (JCArrayTypeTree) elem;
         }
     }
     public void visitTypeApply(JCTypeApply tree) {
         try {
             printExpr(tree.clazz);
             print("<");
             printExprs(tree.arguments);
             print(">");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitTypeUnion(JCTypeUnion tree) {
         try {
             printExprs(tree.alternatives, " | ");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitTypeParameter(JCTypeParameter tree) {
         try {
             print(tree.name);
             if (tree.bounds.nonEmpty()) {
                 print(" extends ");
                 printExprs(tree.bounds, " & ");
             }
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     @Override
     public void visitWildcard(JCWildcard tree) {
         try {
             print(tree.kind);
             if (tree.kind.kind != BoundKind.UNBOUND)
                 printExpr(tree.inner);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     @Override
     public void visitTypeBoundKind(TypeBoundKind tree) {
         try {
             print(String.valueOf(tree.kind));
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitErroneous(JCErroneous tree) {
         try {
             print("(ERROR)");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitLetExpr(LetExpr tree) {
         try {
             print("(let " + tree.defs + " in " + tree.expr + ")");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitModifiers(JCModifiers mods) {
         try {
             printAnnotations(mods.annotations);
             printFlags(mods.flags);
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitAnnotation(JCAnnotation tree) {
         try {
             print("@");
             printExpr(tree.annotationType);
             print("(");
             printExprs(tree.args);
             print(")");
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
     public void visitTree(JCTree tree) {
         try {
             print("(UNKNOWN: " + tree + ")");
             println();
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/tree/Pretty.java@ca49d50318dc (annotated)

src/share/classes/com/sun/tools/javac/tree/Pretty.java