    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 escjava.ast;
    013
    014    import java.util.Hashtable;
    015    import java.util.Set;
    016    import java.util.ArrayList;
    017
    018    import javafe.ast.*;
    019    import javafe.util.Assert;
    020    import javafe.util.Location;
    021    import escjava.ParsedRoutineSpecs;
    022
    023    // Convention: unless otherwise noted, integer fields named "loc" refer
    024    // to the location of the first character of the syntactic unit
    025
    026    //# TagBase javafe.tc.TagConstants.LAST_TAG + 1
    027    //# VisitorRoot javafe.ast.Visitor
    028
    029
    030    public class SubGetsCmd extends AssignCmd
    031    {
    032      // denotes v[index] := rhs
    033      public /*@ non_null @*/ Expr index;
    034
    035
    036
    037    // Generated boilerplate constructors:
    038
    039      /**
    040       * Construct a raw SubGetsCmd whose class invariant(s) have not
    041       * yet been established.  It is the caller's job to
    042       * initialize the returned node's fields so that any
    043       * class invariants hold.
    044       */
    045      //@ requires I_will_establish_invariants_afterwards;
    046      protected SubGetsCmd() {}    //@ nowarn Invariant,NonNullInit;
    047
    048
    049    // Generated boilerplate methods:
    050
    051      public final int childCount() {
    052         return 3;
    053      }
    054
    055      public final Object childAt(int index) {
    056              /*throws IndexOutOfBoundsException*/
    057         if (index < 0)
    058            throw new IndexOutOfBoundsException("AST child index " + index);
    059         int indexPre = index;
    060
    061         int sz;
    062
    063         if (index == 0) return this.v;
    064         else index--;
    065
    066         if (index == 0) return this.rhs;
    067         else index--;
    068
    069         if (index == 0) return this.index;
    070         else index--;
    071
    072         throw new IndexOutOfBoundsException("AST child index " + indexPre);
    073      }   //@ nowarn Exception;
    074
    075      public final String toString() {
    076         return "[SubGetsCmd"
    077            + " v = " + this.v
    078            + " rhs = " + this.rhs
    079            + " index = " + this.index
    080            + "]";
    081      }
    082
    083      public final int getTag() {
    084         return TagConstants.SUBGETSCMD;
    085      }
    086
    087      public final void accept(javafe.ast.Visitor v) {
    088        if (v instanceof Visitor) ((Visitor)v).visitSubGetsCmd(this);
    089      }
    090
    091      public final Object accept(javafe.ast.VisitorArgResult v, Object o) {
    092        if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitSubGetsCmd(this, o); else return null;
    093      }
    094
    095      public void check() {
    096         super.check();
    097         this.v.check();
    098         this.rhs.check();
    099         this.index.check();
    100      }
    101
    102      //@ ensures \result != null;
    103      public static SubGetsCmd make(/*@ non_null @*/ VariableAccess v, /*@ non_null @*/ Expr rhs, /*@ non_null @*/ Expr index) {
    104         //@ set I_will_establish_invariants_afterwards = true;
    105         SubGetsCmd result = new SubGetsCmd();
    106         result.v = v;
    107         result.rhs = rhs;
    108         result.index = index;
    109         return result;
    110      }
    111    }