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 SeqCmd extends GuardedCmd
031    {
032      // denotes g1 ; g2 ; ... ; gn
033      public /*@ non_null @*/ GuardedCmdVec cmds;
034    
035    
036      private void postCheck() {
037        Assert.notFalse(1 < cmds.size());
038      }
039    
040      public int getStartLoc() { return cmds.elementAt(0).getStartLoc(); }
041      public int getEndLoc() { return cmds.elementAt(cmds.size()-1).getEndLoc(); }
042    
043    
044    // Generated boilerplate constructors:
045    
046      /**
047       * Construct a raw SeqCmd whose class invariant(s) have not
048       * yet been established.  It is the caller's job to
049       * initialize the returned node's fields so that any
050       * class invariants hold.
051       */
052      //@ requires I_will_establish_invariants_afterwards;
053      protected SeqCmd() {}    //@ nowarn Invariant,NonNullInit;
054    
055    
056    // Generated boilerplate methods:
057    
058      public final int childCount() {
059         int sz = 0;
060         if (this.cmds != null) sz += this.cmds.size();
061         return sz + 0;
062      }
063    
064      public final Object childAt(int index) {
065              /*throws IndexOutOfBoundsException*/
066         if (index < 0)
067            throw new IndexOutOfBoundsException("AST child index " + index);
068         int indexPre = index;
069    
070         int sz;
071    
072         sz = (this.cmds == null ? 0 : this.cmds.size());
073         if (0 <= index && index < sz)
074            return this.cmds.elementAt(index);
075         else index -= sz;
076    
077         throw new IndexOutOfBoundsException("AST child index " + indexPre);
078      }   //@ nowarn Exception;
079    
080      public final String toString() {
081         return "[SeqCmd"
082            + " cmds = " + this.cmds
083            + "]";
084      }
085    
086      public final int getTag() {
087         return TagConstants.SEQCMD;
088      }
089    
090      public final void accept(javafe.ast.Visitor v) { 
091        if (v instanceof Visitor) ((Visitor)v).visitSeqCmd(this);
092      }
093    
094      public final Object accept(javafe.ast.VisitorArgResult v, Object o) { 
095        if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitSeqCmd(this, o); else return null;
096      }
097    
098      public void check() {
099         super.check();
100         for(int i = 0; i < this.cmds.size(); i++)
101            this.cmds.elementAt(i).check();
102         postCheck();
103      }
104    
105      //@ ensures \result != null;
106      public static SeqCmd make(/*@ non_null @*/ GuardedCmdVec cmds) {
107         //@ set I_will_establish_invariants_afterwards = true;
108         SeqCmd result = new SeqCmd();
109         result.cmds = cmds;
110         return result;
111      }
112    }