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