    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    }