    001    /* Copyright 2000, 2001, Compaq Computer Corporation */
    002
    003    /* IF THIS IS A JAVA FILE, DO NOT EDIT IT!
    004
    005       Most Java files in this directory which are part of the Javafe AST
    006       are automatically generated using the astgen comment (see
    007       ESCTools/Javafe/astgen) from the input file 'hierarchy.h'.  If you
    008       wish to modify AST classes or introduce new ones, modify
    009       'hierarchy.j.'
    010     */
    011
    012    package javafe.ast;
    013
    014    import javafe.util.Assert;
    015    import javafe.util.Location;
    016    import javafe.util.ErrorSet;
    017
    018    // Convention: unless otherwise noted, integer fields named "loc" refer
    019    // to the location of the first character of the syntactic unit
    020
    021
    022    /**
    023     * Represents various kinds of unary expressions.
    024     * The tag is one of the constants:
    025     *      ADD SUB NOT BITNOT INC DEC POSTFIXINC POSTFIXDEC
    026     * defined in OperatorTags.
    027     */
    028
    029    public class UnaryExpr extends Expr
    030    {
    031      /*@ invariant (op == TagConstants.UNARYADD || op == TagConstants.UNARYSUB
    032           || op == TagConstants.NOT || op == TagConstants.BITNOT
    033           || op == TagConstants.INC || op == TagConstants.DEC
    034           || op == TagConstants.POSTFIXINC || op == TagConstants.POSTFIXDEC); */
    035      public int op;
    036
    037
    038      public /*@ non_null @*/ Expr expr;
    039
    040      //@ invariant locOp != javafe.util.Location.NULL;
    041      public int locOp;
    042
    043
    044      public final int getTag() { return op; }
    045
    046      private void postCheck() {
    047        boolean goodtag =
    048          (op == TagConstants.UNARYADD || op == TagConstants.UNARYSUB
    049           || op == TagConstants.NOT || op == TagConstants.BITNOT
    050           || op == TagConstants.INC || op == TagConstants.DEC
    051           || op == TagConstants.POSTFIXINC || op == TagConstants.POSTFIXDEC);
    052        Assert.notFalse(goodtag);
    053      }
    054      public int getStartLoc() {
    055        int le = expr.getStartLoc();
    056        return le < locOp ? le : locOp;
    057      }
    058
    059      public int getEndLoc() {
    060        int le = expr.getEndLoc();
    061        return le < locOp ? locOp : le;
    062      }
    063
    064      /*@ requires (op == TagConstants.UNARYADD || op == TagConstants.UNARYSUB
    065           || op == TagConstants.NOT || op == TagConstants.BITNOT
    066           || op == TagConstants.INC || op == TagConstants.DEC
    067           || op == TagConstants.POSTFIXINC || op == TagConstants.POSTFIXDEC); */
    068      //
    069      //@ requires locOp != javafe.util.Location.NULL;
    070      //@ ensures \result != null;
    071      public static UnaryExpr make(int op, /*@ non_null @*/ Expr expr, int locOp) {
    072         //@ set I_will_establish_invariants_afterwards = true;
    073         UnaryExpr result = new UnaryExpr();
    074         result.op = op;
    075         result.expr = expr;
    076         result.locOp = locOp;
    077         return result;
    078      }
    079
    080
    081    // Generated boilerplate constructors:
    082
    083      /**
    084       * Construct a raw UnaryExpr whose class invariant(s) have not
    085       * yet been established.  It is the caller's job to
    086       * initialize the returned node's fields so that any
    087       * class invariants hold.
    088       */
    089      //@ requires I_will_establish_invariants_afterwards;
    090      protected UnaryExpr() {}    //@ nowarn Invariant,NonNullInit;
    091
    092
    093    // Generated boilerplate methods:
    094
    095      public final int childCount() {
    096         return 1;
    097      }
    098
    099      public final Object childAt(int index) {
    100              /*throws IndexOutOfBoundsException*/
    101         if (index < 0)
    102            throw new IndexOutOfBoundsException("AST child index " + index);
    103         int indexPre = index;
    104
    105         int sz;
    106
    107         if (index == 0) return this.expr;
    108         else index--;
    109
    110         throw new IndexOutOfBoundsException("AST child index " + indexPre);
    111      }   //@ nowarn Exception;
    112
    113      public final String toString() {
    114         return "[UnaryExpr"
    115            + " op = " + this.op
    116            + " expr = " + this.expr
    117            + " locOp = " + this.locOp
    118            + "]";
    119      }
    120
    121      public final void accept(Visitor v) { v.visitUnaryExpr(this); }
    122
    123      public final Object accept(VisitorArgResult v, Object o) {return v.visitUnaryExpr(this, o); }
    124
    125      public void check() {
    126         super.check();
    127         this.expr.check();
    128         postCheck();
    129      }
    130
    131    }