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 ExprCmd extends GuardedCmd
031    {
032      // Denotes assert or assume
033      public int cmd;
034    
035      public /*@ non_null @*/ Expr pred;
036    
037      public int loc;
038    
039    
040      public final int getTag() { return cmd; }
041    
042      private void postCheck() {
043        boolean goodtag =
044          (cmd == TagConstants.ASSERTCMD || cmd == TagConstants.ASSUMECMD);
045        Assert.notFalse(goodtag);
046      }
047    
048      public int getStartLoc() { return loc; }
049    
050    
051    // Generated boilerplate constructors:
052    
053      /**
054       * Construct a raw ExprCmd whose class invariant(s) have not
055       * yet been established.  It is the caller's job to
056       * initialize the returned node's fields so that any
057       * class invariants hold.
058       */
059      //@ requires I_will_establish_invariants_afterwards;
060      protected ExprCmd() {}    //@ nowarn Invariant,NonNullInit;
061    
062    
063    // Generated boilerplate methods:
064    
065      public final int childCount() {
066         return 1;
067      }
068    
069      public final Object childAt(int index) {
070              /*throws IndexOutOfBoundsException*/
071         if (index < 0)
072            throw new IndexOutOfBoundsException("AST child index " + index);
073         int indexPre = index;
074    
075         int sz;
076    
077         if (index == 0) return this.pred;
078         else index--;
079    
080         throw new IndexOutOfBoundsException("AST child index " + indexPre);
081      }   //@ nowarn Exception;
082    
083      public final String toString() {
084         return "[ExprCmd"
085            + " cmd = " + this.cmd
086            + " pred = " + this.pred
087            + " loc = " + this.loc
088            + "]";
089      }
090    
091      public final void accept(javafe.ast.Visitor v) { 
092        if (v instanceof Visitor) ((Visitor)v).visitExprCmd(this);
093      }
094    
095      public final Object accept(javafe.ast.VisitorArgResult v, Object o) { 
096        if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitExprCmd(this, o); else return null;
097      }
098    
099      public void check() {
100         super.check();
101         this.pred.check();
102         postCheck();
103      }
104    
105      //@ ensures \result != null;
106      public static ExprCmd make(int cmd, /*@ non_null @*/ Expr pred, int loc) {
107         //@ set I_will_establish_invariants_afterwards = true;
108         ExprCmd result = new ExprCmd();
109         result.cmd = cmd;
110         result.pred = pred;
111         result.loc = loc;
112         return result;
113      }
114    }