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    }