    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 RestoreFromCmd extends AssignCmd
    031    {
    032      // denotes RESTORE v FROM rhs
    033      // which has the same effect as v := rhs
    034      // but does not count "v" as a target
    035
    036
    037    // Generated boilerplate constructors:
    038
    039       /**
    040        * Construct a raw RestoreFromCmd 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 RestoreFromCmd() {}    //@ nowarn Invariant,NonNullInit;
    047
    048
    049    // Generated boilerplate methods:
    050
    051       public final int childCount() {
    052          return 2;
    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          throw new IndexOutOfBoundsException("AST child index " + indexPre);
    070       }   //@ nowarn Exception;
    071
    072       public final String toString() {
    073          return "[RestoreFromCmd"
    074             + " v = " + this.v
    075             + " rhs = " + this.rhs
    076             + "]";
    077       }
    078
    079       public final int getTag() {
    080          return TagConstants.RESTOREFROMCMD;
    081       }
    082
    083       public final void accept(javafe.ast.Visitor v) {
    084          if (v instanceof Visitor) ((Visitor)v).visitRestoreFromCmd(this);
    085       }
    086
    087       public final Object accept(javafe.ast.VisitorArgResult v, Object o) {
    088          if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitRestoreFromCmd(this, o); else return null;
    089       }
    090
    091       public void check() {
    092          super.check();
    093          this.v.check();
    094          this.rhs.check();
    095       }
    096
    097       //@ ensures \result != null;
    098       public static RestoreFromCmd make(/*@ non_null @*/ VariableAccess v, /*@ non_null @*/ Expr rhs) {
    099          //@ set I_will_establish_invariants_afterwards = true;
    100          RestoreFromCmd result = new RestoreFromCmd();
    101          result.v = v;
    102          result.rhs = rhs;
    103          return result;
    104       }
    105    }