Examples of com.sun.tools.javac.tree.JCTree

com.sun.tools.javac.tree.JCTree
Root class for abstract syntax tree nodes. It provides definitions for specific tree nodes as subclasses nested inside.
Each subclass is highly standardized. It generally contains only tree fields for the syntactic subcomponents of the node. Some classes that represent identifier uses or definitions also define a Symbol field that denotes the represented identifier. Classes for non-local jumps also carry the jump target as a field. The root class Tree itself defines fields for the tree's type and position. No other fields are kept in a tree node; instead parameters are passed to methods accessing the node.
Except for the methods defined by com.sun.source, the only method defined in subclasses is `visit' which applies a given visitor to the tree. The actual tree processing is done by visitor classes in other packages. The abstract class Visitor, as well as an Factory interface for trees, are defined as inner classes in Tree.
To avoid ambiguities with the Tree API in com.sun.source all sub classes should, by convention, start with JC (javac).
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. @see TreeMaker @see TreeInfo @see TreeTranslator @see Pretty


    /** Visitor method for parenthesized expressions.
     *  If the subexpression has changed, omit the parens.
     */
    public void visitParens(JCParens tree) {
        JCTree expr = translate(tree.expr);
        result = ((expr == tree.expr) ? tree : expr);
    }

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        if (!tree.lhs.type.isPrimitive() &&
            tree.operator.type.getReturnType().isPrimitive()) {
            // boxing required; need to rewrite as x = (unbox typeof x)(x op y);
            // or if x == (typeof x)z then z = (unbox typeof x)((typeof x)z op y)
            // (but without recomputing x)
            JCTree arg = (tree.lhs.getTag() == JCTree.TYPECAST)
                ? ((JCTypeCast)tree.lhs).expr
                : tree.lhs;
            JCTree newTree = abstractLval(arg, new TreeBuilder() {
                    public JCTree build(final JCTree lhs) {
                        int newTag = tree.getTag() - JCTree.ASGOffset;
                        // Erasure (TransTypes) can change the type of
                        // tree.lhs.  However, we can still get the
                        // unerased type of tree.lhs as it is stored

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                public JCTree build(final JCTree tmp1) {
                    return abstractRval(tmp1, tree.arg.type, new TreeBuilder() {
                            public JCTree build(final JCTree tmp2) {
                                int opcode = (tree.getTag() == JCTree.POSTINC)
                                    ? JCTree.PLUS_ASG : JCTree.MINUS_ASG;
                                JCTree lhs = cast
                                    ? make.TypeCast(tree.arg.type, (JCExpression)tmp1)
                                    : tmp1;
                                JCTree update = makeAssignop(opcode,
                                                             lhs,
                                                             make.Literal(1));
                                return makeComma(update, tmp2);
                            }
                        });

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        }
    }


    public void visitBinary(JCBinary tree) {
        List<Type> formals = tree.operator.type.getParameterTypes();
        JCTree lhs = tree.lhs = translate(tree.lhs, formals.head);
        switch (tree.getTag()) {
        case JCTree.OR:
            if (lhs.type.isTrue()) {
                result = lhs;
                return;

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        Symbol toStringSym = lookupMethod(cdef.pos(),
                                          names.toString,
                                          cdef.type,
                                          List.<Type>nil());


        JCTree toStringDecl = null;
        if (toStringSym != null)
            toStringDecl = TreeInfo.declarationFor(toStringSym, cdef);


        if (toStringDecl != null)
            return (MethodSymbol)toStringSym;


        JCStatement ret = make.Return(make.Ident(nameSymbol));


        JCTree resTypeTree = make.Type(syms.stringType);


        MethodType toStringType = new MethodType(List.<Type>nil(),
                                                 syms.stringType,
                                                 List.<Type>nil(),
                                                 cdef.sym);

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               success_handler);
        next_label = next_component.label;
    }
      } else {
    // final join
    JCTree adjust_state = null;
    if (component.annotation.isLinear())
        adjust_state = b.assign(b.id(state_var), most_recent_nonlinear_state);
    else {
        // if nonlinear, we still MUST back up our state

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        JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ?
                                  env.enclClass.sym.sourcefile :
                                  env.toplevel.sourcefile);
        try {
            //save tree prior to rewriting
            JCTree untranslated = env.tree;


            make.at(Position.FIRSTPOS);
            TreeMaker localMake = make.forToplevel(env.toplevel);


            if (env.tree instanceof JCCompilationUnit) {

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                }
                @Override
                public void visitClassDef(JCClassDecl tree) {
                    ListBuffer<JCTree> newdefs = new ListBuffer<>();
                    for (List<JCTree> it = tree.defs; it.tail != null; it = it.tail) {
                        JCTree t = it.head;
                        switch (t.getTag()) {
                        case CLASSDEF:
                            if (isInterface ||
                                (((JCClassDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
                                (((JCClassDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCClassDecl) t).sym.packge().getQualifiedName() == names.java_lang)
                                newdefs.append(t);

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                }
                @Override
                public void visitClassDef(JCClassDecl tree) {
                    ListBuffer<JCTree> newdefs = new ListBuffer<>();
                    for (List<JCTree> it = tree.defs; it.tail != null; it = it.tail) {
                        JCTree t = it.head;
                        switch (t.getTag()) {
                        case CLASSDEF:
                            if (isInterface ||
                                (((JCClassDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
                                (((JCClassDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCClassDecl) t).sym.packge().getQualifiedName() == names.java_lang)
                                newdefs.append(t);

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        ParserFactory parserFactory = ParserFactory.instance(context);
        Attr attr = Attr.instance(context);
        try {
            CharBuffer buf = CharBuffer.wrap((expr+"\u0000").toCharArray(), 0, expr.length());
            Parser parser = parserFactory.newParser(buf, false, false, false);
            JCTree tree = parser.parseType();
            return attr.attribType(tree, (Symbol.TypeSymbol)scope);
        } finally {
            compiler.log.useSource(prev);
        }
    }

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