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