    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    public class InstanceOfExpr extends Expr
    023    {
    024      public /*@ non_null @*/ Expr expr;
    025
    026      //@ invariant type.syntax;
    027      public /*@ non_null @*/ Type type;
    028
    029      //@ invariant loc != javafe.util.Location.NULL;
    030      public int loc;
    031
    032      public int getStartLoc() { return expr.getStartLoc(); }
    033      public int getEndLoc() { return type.getEndLoc(); }
    034
    035
    036    // Generated boilerplate constructors:
    037
    038      /**
    039       * Construct a raw InstanceOfExpr whose class invariant(s) have not
    040       * yet been established.  It is the caller's job to
    041       * initialize the returned node's fields so that any
    042       * class invariants hold.
    043       */
    044      //@ requires I_will_establish_invariants_afterwards;
    045      protected InstanceOfExpr() {}    //@ nowarn Invariant,NonNullInit;
    046
    047
    048    // Generated boilerplate methods:
    049
    050      public final int childCount() {
    051         return 2;
    052      }
    053
    054      public final Object childAt(int index) {
    055              /*throws IndexOutOfBoundsException*/
    056         if (index < 0)
    057            throw new IndexOutOfBoundsException("AST child index " + index);
    058         int indexPre = index;
    059
    060         int sz;
    061
    062         if (index == 0) return this.expr;
    063         else index--;
    064
    065         if (index == 0) return this.type;
    066         else index--;
    067
    068         throw new IndexOutOfBoundsException("AST child index " + indexPre);
    069      }   //@ nowarn Exception;
    070
    071      public final String toString() {
    072         return "[InstanceOfExpr"
    073            + " expr = " + this.expr
    074            + " type = " + this.type
    075            + " loc = " + this.loc
    076            + "]";
    077      }
    078
    079      public final int getTag() {
    080         return TagConstants.INSTANCEOFEXPR;
    081      }
    082
    083      public final void accept(Visitor v) { v.visitInstanceOfExpr(this); }
    084
    085      public final Object accept(VisitorArgResult v, Object o) {return v.visitInstanceOfExpr(this, o); }
    086
    087      public void check() {
    088         super.check();
    089         this.expr.check();
    090         this.type.check();
    091      }
    092
    093      //@ requires type.syntax;
    094      //@ requires loc != javafe.util.Location.NULL;
    095      //@ ensures \result != null;
    096      public static InstanceOfExpr make(/*@ non_null @*/ Expr expr, /*@ non_null @*/ Type type, int loc) {
    097         //@ set I_will_establish_invariants_afterwards = true;
    098         InstanceOfExpr result = new InstanceOfExpr();
    099         result.expr = expr;
    100         result.type = type;
    101         result.loc = loc;
    102         return result;
    103      }
    104    }