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 DefPred extends ASTNode
031    {
032        public /*@ non_null @*/ Identifier predId;
033    
034        public /*@ non_null @*/ GenericVarDeclVec args;
035    
036        public /*@ non_null @*/ Expr body;
037    
038    
039        public int getStartLoc() { return body.getStartLoc(); }
040    
041    
042    // Generated boilerplate constructors:
043    
044        /**
045         * Construct a raw DefPred whose class invariant(s) have not
046         * yet been established.  It is the caller's job to
047         * initialize the returned node's fields so that any
048         * class invariants hold.
049         */
050        //@ requires I_will_establish_invariants_afterwards;
051        protected DefPred() {}    //@ nowarn Invariant,NonNullInit;
052    
053    
054    // Generated boilerplate methods:
055    
056        public final int childCount() {
057           int sz = 0;
058           if (this.args != null) sz += this.args.size();
059           return sz + 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.predId;
071           else index--;
072    
073           sz = (this.args == null ? 0 : this.args.size());
074           if (0 <= index && index < sz)
075              return this.args.elementAt(index);
076           else index -= sz;
077    
078           if (index == 0) return this.body;
079           else index--;
080    
081           throw new IndexOutOfBoundsException("AST child index " + indexPre);
082        }   //@ nowarn Exception;
083    
084        public final String toString() {
085           return "[DefPred"
086              + " predId = " + this.predId
087              + " args = " + this.args
088              + " body = " + this.body
089              + "]";
090        }
091    
092        public final int getTag() {
093           return TagConstants.DEFPRED;
094        }
095    
096        public final void accept(javafe.ast.Visitor v) { 
097            if (v instanceof Visitor) ((Visitor)v).visitDefPred(this);
098        }
099    
100        public final Object accept(javafe.ast.VisitorArgResult v, Object o) { 
101            if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitDefPred(this, o); else return null;
102        }
103    
104        public void check() {
105           this.predId.check();
106           for(int i = 0; i < this.args.size(); i++)
107              this.args.elementAt(i).check();
108           this.body.check();
109        }
110    
111        //@ ensures \result != null;
112        public static DefPred make(/*@ non_null @*/ Identifier predId, /*@ non_null @*/ GenericVarDeclVec args, /*@ non_null @*/ Expr body) {
113           //@ set I_will_establish_invariants_afterwards = true;
114           DefPred result = new DefPred();
115           result.predId = predId;
116           result.args = args;
117           result.body = body;
118           return result;
119        }
120    }