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