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