001    // -*- mode: java -*-
002    /* Copyright 2000, 2001, Compaq Computer Corporation */
003    
004    /* IF THIS IS A JAVA FILE, DO NOT EDIT IT!  
005    
006       Most Java files in this directory which are part of the Javafe AST
007       are automatically generated using the astgen comment (see
008       ESCTools/Javafe/astgen) from the input file 'hierarchy.h'.  If you
009       wish to modify AST classes or introduce new ones, modify
010       'hierarchy.j.'
011     */
012    
013    package escjava.ast;
014    
015    import java.util.Hashtable;
016    import java.util.Set;
017    import java.util.ArrayList;
018    
019    import javafe.ast.*;
020    import javafe.util.Assert;
021    import javafe.util.Location;
022    import escjava.ParsedRoutineSpecs;
023    
024    // Convention: unless otherwise noted, integer fields named "loc" refer
025    // to the location of the first character of the syntactic unit
026    
027    //# TagBase javafe.tc.TagConstants.LAST_TAG + 1
028    //# VisitorRoot javafe.ast.Visitor
029    
030    
031    public class WildRefExpr extends Expr
032    {
033      public /*@ non_null @*/ Expr var;
034    
035      public /*@ non_null @*/ ObjectDesignator od;
036    
037    
038      //@ public represents startLoc <- od != null ? od.getStartLoc() : var.getStartLoc();
039      public /*@ pure @*/ int getStartLoc() { return od != null ? od.getStartLoc() : var.getStartLoc(); }
040      /*@ also
041        @ public normal_behavior
042        @ ensures \result == (od != null ? od.getEndLoc() : var.getEndLoc());
043        @*/
044      public /*@ pure @*/ int getEndLoc() { return od != null ? od.getEndLoc() : var.getEndLoc(); }
045    
046    
047    // Generated boilerplate constructors:
048    
049      //@ ensures this.var == var;
050      //@ ensures this.od == od;
051      protected WildRefExpr(/*@ non_null @*/ Expr var, /*@ non_null @*/ ObjectDesignator od) {
052         this.var = var;
053         this.od = od;
054      }
055    
056    // Generated boilerplate methods:
057    
058      public final int childCount() {
059         return 2;
060      }
061    
062      public final Object childAt(int index) {
063              /*throws IndexOutOfBoundsException*/
064         if (index < 0)
065            throw new IndexOutOfBoundsException("AST child index " + index);
066         int indexPre = index;
067    
068         int sz;
069    
070         if (index == 0) return this.var;
071         else index--;
072    
073         if (index == 0) return this.od;
074         else index--;
075    
076         throw new IndexOutOfBoundsException("AST child index " + indexPre);
077      }   //@ nowarn Exception;
078    
079      public final /*@non_null*/String toString() {
080         return "[WildRefExpr"
081            + " var = " + this.var
082            + " od = " + this.od
083            + "]";
084      }
085    
086      public final int getTag() {
087         return TagConstants.WILDREFEXPR;
088      }
089    
090      public final void accept(javafe.ast.Visitor v) { 
091        if (v instanceof Visitor) ((Visitor)v).visitWildRefExpr(this);
092      }
093    
094      public final Object accept(javafe.ast.VisitorArgResult v, Object o) { 
095        if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitWildRefExpr(this, o); else return null;
096      }
097    
098      public void check() {
099         this.var.check();
100         this.od.check();
101      }
102    
103      //@ ensures \result != null;
104      public static WildRefExpr make(/*@ non_null @*/ Expr var, /*@ non_null @*/ ObjectDesignator od) {
105         WildRefExpr result = new WildRefExpr(var, od);
106         return result;
107      }
108    }