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 javafe.ast;
013    
014    import javafe.util.Assert;
015    import javafe.util.Location;
016    import javafe.util.ErrorSet;
017    
018    // Convention: unless otherwise noted, integer fields named "loc" refer
019    // to the location of the first character of the syntactic unit
020    
021    
022    /**
023     * Represents a ObjectDesignator of the form "TypeName . " 
024     *
025     * <p> Is created from AmbiguousVariableAccess/AmbiguousMethodInvocation
026     * by the name resolution code.  
027     * The <code>type</code> must be an instance of either <code>TypeName</code>
028     * or <code>TypeSig</code>  (found in <code>javafe.tc</code>).
029     * If <code>type</code> is a <code>TypeName</code>, then an explicit
030     * type name was given in the program text; if <code>type</code> 
031     * is a <code>TypeSig</code>, then the type was inferred.
032     */
033    
034    public class TypeObjectDesignator extends ObjectDesignator
035    {
036      //@ invariant type instanceof TypeName || type instanceof javafe.tc.TypeSig;
037      public /*@ non_null @*/ Type type;
038    
039    
040      private void postCheck() {
041        Assert.notNull(type);       
042      }
043    
044        public int getStartLoc() {
045            if (!(type instanceof javafe.tc.TypeSig))
046                return type.getStartLoc();
047    
048            return locDot;
049        }
050    
051      public Type type() { return type; }
052    
053      //* Manual maker to ensure invariant on type satisfied
054      //@ requires type instanceof TypeName || type instanceof javafe.tc.TypeSig;
055      //
056      //@ requires locDot != javafe.util.Location.NULL;
057      //@ ensures \result != null;
058      public static TypeObjectDesignator make(int locDot, 
059                                              /*@ non_null @*/ Type type) {
060         //@ set I_will_establish_invariants_afterwards = true;
061         TypeObjectDesignator result = new TypeObjectDesignator();
062         result.locDot = locDot;
063         result.type = type;
064         return result;
065      }
066    
067    
068    // Generated boilerplate constructors:
069    
070      /**
071       * Construct a raw TypeObjectDesignator whose class invariant(s) have not
072       * yet been established.  It is the caller's job to
073       * initialize the returned node's fields so that any
074       * class invariants hold.
075       */
076      //@ requires I_will_establish_invariants_afterwards;
077      protected TypeObjectDesignator() {}    //@ nowarn Invariant,NonNullInit;
078    
079    
080    // Generated boilerplate methods:
081    
082      public final int childCount() {
083         return 1;
084      }
085    
086      public final Object childAt(int index) {
087              /*throws IndexOutOfBoundsException*/
088         if (index < 0)
089            throw new IndexOutOfBoundsException("AST child index " + index);
090         int indexPre = index;
091    
092         int sz;
093    
094         if (index == 0) return this.type;
095         else index--;
096    
097         throw new IndexOutOfBoundsException("AST child index " + indexPre);
098      }   //@ nowarn Exception;
099    
100      public final String toString() {
101         return "[TypeObjectDesignator"
102            + " locDot = " + this.locDot
103            + " type = " + this.type
104            + "]";
105      }
106    
107      public final int getTag() {
108         return TagConstants.TYPEOBJECTDESIGNATOR;
109      }
110    
111      public final void accept(Visitor v) { v.visitTypeObjectDesignator(this); }
112    
113      public final Object accept(VisitorArgResult v, Object o) {return v.visitTypeObjectDesignator(this, o); }
114    
115      public void check() {
116         super.check();
117         this.type.check();
118         postCheck();
119      }
120    
121    }