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    public class SimpleName extends Name
023    {
024      public /*@ non_null @*/ Identifier id;
025    
026    
027      //@ invariant loc != javafe.util.Location.NULL;
028      public int loc;
029    
030    
031      //@ invariant length == 1;
032    
033      /**
034       * @return a String representation of <code>this</code> in Java's
035       * syntax.
036       */
037      public String printName() {
038        return id.toString();
039      }
040    
041        public boolean equals(Object other) {
042            if (other instanceof SimpleName)
043                return id == ((SimpleName)other).id;
044            else
045                return false;
046        }
047    
048      public Name prefix(int len) {
049        Assert.precondition(len == 1);
050        return make(id, loc);
051      }
052    
053      /** Return a hash code for <code>this</code> such that two
054        <code>Name</code>s that are <code>equals</code> have the same hash
055        code.
056       */
057      public int hashCode() {
058        return id.hashCode();
059      }
060    
061      /**
062       * @return the first <code>len</code> identifiers in
063       * <code>this</code> in an array.  Requires that <code>len</code> be
064       * between 0 and length of <code>this</code> inclusive.
065       */
066      public String[] toStrings(int len) {
067        Assert.precondition(len == 0 || len == 1);
068        if (len == 0) return emptyStringArray;
069        String[] result = { id.toString() };
070        return result;
071      }
072    
073      /** Return the number of identifiers in <code>this</code>. */
074      public int size() { return 1; }
075    
076      /** Return the ith identifier of <code>this</code>. */
077      public Identifier identifierAt(int i) {
078        if (i != 0) throw new ArrayIndexOutOfBoundsException();
079        return id;
080      }
081    
082      /** Return the location of the ith identifier of <code>this</code>. */
083      public int locIdAt(int i) {
084        if (i != 0) throw new ArrayIndexOutOfBoundsException();
085        return loc;
086      }
087    
088      /** Return the location of the dot after the ith identifier of
089        <code>this</code>.
090       */
091      public int locDotAfter(int i) {
092        throw new ArrayIndexOutOfBoundsException();
093      }
094    
095      public int getStartLoc() { return loc; }
096    
097    
098    // Generated boilerplate constructors:
099    
100      /**
101       * Construct a raw SimpleName whose class invariant(s) have not
102       * yet been established.  It is the caller's job to
103       * initialize the returned node's fields so that any
104       * class invariants hold.
105       */
106      //@ requires I_will_establish_invariants_afterwards;
107      protected SimpleName() {}    //@ nowarn Invariant,NonNullInit;
108    
109    
110    // Generated boilerplate methods:
111    
112      public final int childCount() {
113         return 1;
114      }
115    
116      public final Object childAt(int index) {
117              /*throws IndexOutOfBoundsException*/
118         if (index < 0)
119            throw new IndexOutOfBoundsException("AST child index " + index);
120         int indexPre = index;
121    
122         int sz;
123    
124         if (index == 0) return this.id;
125         else index--;
126    
127         throw new IndexOutOfBoundsException("AST child index " + indexPre);
128      }   //@ nowarn Exception;
129    
130      public final String toString() {
131         return "[SimpleName"
132            + " id = " + this.id
133            + " loc = " + this.loc
134            + "]";
135      }
136    
137      public final int getTag() {
138         return TagConstants.SIMPLENAME;
139      }
140    
141      public final void accept(Visitor v) { v.visitSimpleName(this); }
142    
143      public final Object accept(VisitorArgResult v, Object o) {return v.visitSimpleName(this, o); }
144    
145      public void check() {
146         super.check();
147         if (this.id == null) throw new RuntimeException();
148      }
149    
150      //@ requires loc != javafe.util.Location.NULL;
151      //@ ensures \result != null;
152      public static SimpleName make(/*@ non_null @*/ Identifier id, int loc) {
153         //@ set I_will_establish_invariants_afterwards = true;
154         SimpleName result = new SimpleName();
155         result.id = id;
156         result.loc = loc;
157         return result;
158      }
159    }