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

            if (sym.name==names.init &&
                sym.owner == syms.enumSym)
                formals = formals.tail.tail;
            List<JCExpression> args = argtrees;
            while (formals.head != last) {
                JCTree arg = args.head;
                Warner warn = chk.convertWarner(arg.pos(), arg.type, formals.head);
                assertConvertible(arg, arg.type, formals.head, warn);
                warned |= warn.warned;
                args = args.tail;
                formals = formals.tail;
            }
            if (useVarargs) {
                Type varArg = types.elemtype(last);
                while (args.tail != null) {
                    JCTree arg = args.head;
                    Warner warn = chk.convertWarner(arg.pos(), arg.type, varArg);
                    assertConvertible(arg, arg.type, varArg, warn);
                    warned |= warn.warned;
                    args = args.tail;
                }
            } else if ((sym.flags() & VARARGS) != 0 && allowVarargs) {
                // non-varargs call to varargs method
                Type varParam = owntype.getParameterTypes().last();
                Type lastArg = argtypes.last();
                if (types.isSubtypeUnchecked(lastArg, types.elemtype(varParam)) &&
                    !types.isSameType(types.erasure(varParam), types.erasure(lastArg)))
                    log.warning(argtrees.last().pos(), "inexact.non-varargs.call",
                                types.elemtype(varParam),
                                varParam);
            }


            if (warned && sym.type.tag == FORALL) {
                String typeargs = "";
                if (typeargtypes != null && typeargtypes.nonEmpty()) {
                    typeargs = "<" + Type.toString(typeargtypes) + ">";
                }
                chk.warnUnchecked(env.tree.pos(),
                                  "unchecked.meth.invocation.applied",
                                  sym,
                                  sym.location(),
                                  typeargs,
                                  Type.toString(argtypes));
                owntype = new MethodType(owntype.getParameterTypes(),
                                         types.erasure(owntype.getReturnType()),
                                         owntype.getThrownTypes(),
                                         syms.methodClass);
            }
            if (useVarargs) {
                JCTree tree = env.tree;
                Type argtype = owntype.getParameterTypes().last();
                if (!types.isReifiable(argtype))
                    chk.warnUnchecked(env.tree.pos(),
                                      "unchecked.generic.array.creation",
                                      argtype);
                Type elemtype = types.elemtype(argtype);
                switch (tree.getTag()) {
                case JCTree.APPLY:
                    ((JCMethodInvocation) tree).varargsElement = elemtype;
                    break;
                case JCTree.NEWCLASS:
                    ((JCNewClass) tree).varargsElement = elemtype;

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        if (bs.length() > 1) {
            // ... the variable's bound is a class type flagged COMPOUND
            // (see comment for TypeVar.bound).
            // In this case, generate a class tree that represents the
            // bound class, ...
            JCTree extending;
            List<JCExpression> implementing;
            if ((bs.head.tsym.flags() & INTERFACE) == 0) {
                extending = tree.bounds.head;
                implementing = tree.bounds.tail;
            } else {

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      //    if (state == 1) return false;
      //    state = 1;


      final int eval_state_id = this.eval.getStateId();


      final JCTree return_on_fail =
    b.ifThen(b.isEqual(b.id("state"), b.intLiteral(eval_state_id)),
       bbc.failStmt("issj-0"));
      this.eval.prependStmt(b.assign("state", b.intLiteral(eval_state_id)));
      this.eval.prependStmt(b.ifThen(b.isEqual(b.id("state"), b.intLiteral(eval_state_id)),
             bbc.failStmt("issj-1")));

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                          classDollarSym);


        JCStatement rethrow;
        if (target.hasInitCause()) {
            // rethrow = "throw new NoClassDefFoundError().initCause(e);
            JCTree throwExpr =
                makeCall(makeNewClass(syms.noClassDefFoundErrorType,
                                      List.<JCExpression>nil()),
                         names.initCause,
                         List.<JCExpression>of(make.Ident(catchParam)));
            rethrow = make.Throw(throwExpr);

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                                          target.syntheticNameChar()
                                          + "" + rval.hashCode()),
                                      type,
                                      currentMethodSym);
        JCVariableDecl def = make.VarDef(var, (JCExpression)rval); // XXX cast
        JCTree built = builder.build(make.Ident(var));
        JCTree res = make.LetExpr(def, built);
        res.type = built.type;
        return res;
    }

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        switch (lval.getTag()) {
        case JCTree.IDENT:
            return builder.build(lval);
        case JCTree.SELECT: {
            final JCFieldAccess s = (JCFieldAccess)lval;
            JCTree selected = TreeInfo.skipParens(s.selected);
            Symbol lid = TreeInfo.symbol(s.selected);
            if (lid != null && lid.kind == TYP) return builder.build(lval);
            return abstractRval(s.selected, new TreeBuilder() {
                    public JCTree build(final JCTree selected) {
                        return builder.build(make.Select((JCExpression)selected, s.sym));
                    }
                });
        }
        case JCTree.INDEXED: {
            final JCArrayAccess i = (JCArrayAccess)lval;
            return abstractRval(i.indexed, new TreeBuilder() {
                    public JCTree build(final JCTree indexed) {
                        return abstractRval(i.index, syms.intType, new TreeBuilder() {
                                public JCTree build(final JCTree index) {
                                    JCTree newLval = make.Indexed((JCExpression)indexed,
                                                                (JCExpression)index);
                                    newLval.setType(i.type);
                                    return builder.build(newLval);
                                }
                            });
                    }
                });

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        // list `tree.defs'.
        List<JCTree> seen = List.nil();
        while (tree.defs != seen) {
            List<JCTree> unseen = tree.defs;
            for (List<JCTree> l = unseen; l.nonEmpty() && l != seen; l = l.tail) {
                JCTree outermostMemberDefPrev = outermostMemberDef;
                if (outermostMemberDefPrev == null) outermostMemberDef = l.head;
                l.head = translate(l.head);
                outermostMemberDef = outermostMemberDefPrev;
            }
            seen = unseen;

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    // preserve possible side-effects in the condition expression.


    /** Visitor method for conditional expressions.
     */
    public void visitConditional(JCConditional tree) {
        JCTree cond = tree.cond = translate(tree.cond, syms.booleanType);
        if (cond.type.isTrue()) {
            result = convert(translate(tree.truepart, tree.type), tree.type);
        } else if (cond.type.isFalse()) {
            result = convert(translate(tree.falsepart, tree.type), tree.type);
        } else {

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        }
    }
//where
        private JCTree convert(JCTree tree, Type pt) {
            if (tree.type == pt) return tree;
            JCTree result = make_at(tree.pos()).TypeCast(make.Type(pt), (JCExpression)tree);
            result.type = (tree.type.constValue() != null) ? cfolder.coerce(tree.type, pt)
                                                           : pt;
            return result;
        }

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        }


    /** Visitor method for if statements.
     */
    public void visitIf(JCIf tree) {
        JCTree cond = tree.cond = translate(tree.cond, syms.booleanType);
        if (cond.type.isTrue()) {
            result = translate(tree.thenpart);
        } else if (cond.type.isFalse()) {
            if (tree.elsepart != null) {
                result = translate(tree.elsepart);

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