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 ArrayRefExpr extends Expr
023    {
024      public /*@ non_null @*/ Expr array;
025    
026      public /*@ non_null @*/ Expr index;
027    
028      //@ invariant locOpenBracket != javafe.util.Location.NULL;
029      public int locOpenBracket;
030    
031      //@ invariant locCloseBracket != javafe.util.Location.NULL;
032      public int locCloseBracket;
033    
034      public int getStartLoc() { return array.getStartLoc(); }
035      public int getEndLoc() { return locCloseBracket; }
036    
037    
038    // Generated boilerplate constructors:
039    
040      /**
041       * Construct a raw ArrayRefExpr whose class invariant(s) have not
042       * yet been established.  It is the caller's job to
043       * initialize the returned node's fields so that any
044       * class invariants hold.
045       */
046      //@ requires I_will_establish_invariants_afterwards;
047      protected ArrayRefExpr() {}    //@ nowarn Invariant,NonNullInit;
048    
049    
050    // Generated boilerplate methods:
051    
052      public final int childCount() {
053         return 2;
054      }
055    
056      public final Object childAt(int index) {
057              /*throws IndexOutOfBoundsException*/
058         if (index < 0)
059            throw new IndexOutOfBoundsException("AST child index " + index);
060         int indexPre = index;
061    
062         int sz;
063    
064         if (index == 0) return this.array;
065         else index--;
066    
067         if (index == 0) return this.index;
068         else index--;
069    
070         throw new IndexOutOfBoundsException("AST child index " + indexPre);
071      }   //@ nowarn Exception;
072    
073      public final String toString() {
074         return "[ArrayRefExpr"
075            + " array = " + this.array
076            + " index = " + this.index
077            + " locOpenBracket = " + this.locOpenBracket
078            + " locCloseBracket = " + this.locCloseBracket
079            + "]";
080      }
081    
082      public final int getTag() {
083         return TagConstants.ARRAYREFEXPR;
084      }
085    
086      public final void accept(Visitor v) { v.visitArrayRefExpr(this); }
087    
088      public final Object accept(VisitorArgResult v, Object o) {return v.visitArrayRefExpr(this, o); }
089    
090      public void check() {
091         super.check();
092         this.array.check();
093         this.index.check();
094      }
095    
096      //@ requires locOpenBracket != javafe.util.Location.NULL;
097      //@ requires locCloseBracket != javafe.util.Location.NULL;
098      //@ ensures \result != null;
099      public static ArrayRefExpr make(/*@ non_null @*/ Expr array, /*@ non_null @*/ Expr index, int locOpenBracket, int locCloseBracket) {
100         //@ set I_will_establish_invariants_afterwards = true;
101         ArrayRefExpr result = new ArrayRefExpr();
102         result.array = array;
103         result.index = index;
104         result.locOpenBracket = locOpenBracket;
105         result.locCloseBracket = locCloseBracket;
106         return result;
107      }
108    }