001    // -*- mode: java -*-
002    /* Copyright 2000, 2001, Compaq Computer Corporation */
003    
004    /* IF THIS IS A JAVA FILE, DO NOT EDIT IT!  
005    
006       Most Java files in this directory which are part of the Javafe AST
007       are automatically generated using the astgen comment (see
008       ESCTools/Javafe/astgen) from the input file 'hierarchy.h'.  If you
009       wish to modify AST classes or introduce new ones, modify
010       'hierarchy.j.'
011     */
012    
013    package escjava.ast;
014    
015    import java.util.Hashtable;
016    import java.util.Set;
017    import java.util.ArrayList;
018    
019    import javafe.ast.*;
020    import javafe.util.Assert;
021    import javafe.util.Location;
022    import escjava.ParsedRoutineSpecs;
023    
024    // Convention: unless otherwise noted, integer fields named "loc" refer
025    // to the location of the first character of the syntactic unit
026    
027    //# TagBase javafe.tc.TagConstants.LAST_TAG + 1
028    //# VisitorRoot javafe.ast.Visitor
029    
030    
031    public class GuardExpr extends Expr
032    {
033      public /*@ non_null @*/ Expr expr;
034    
035      public int locPragmaDecl;
036    
037    
038      //@ public represents startLoc <- expr.getStartLoc();
039      public /*@ pure @*/ int getStartLoc() { return expr.getStartLoc(); }
040      /*@ also
041        @ public normal_behavior
042        @ ensures \result == expr.getEndLoc();
043        @*/
044      public /*@ pure @*/ int getEndLoc() { return expr.getEndLoc(); }
045    
046    
047    // Generated boilerplate constructors:
048    
049      //@ ensures this.expr == expr;
050      //@ ensures this.locPragmaDecl == locPragmaDecl;
051      protected GuardExpr(/*@ non_null @*/ Expr expr, int locPragmaDecl) {
052         this.expr = expr;
053         this.locPragmaDecl = locPragmaDecl;
054      }
055    
056    // Generated boilerplate methods:
057    
058      public final int childCount() {
059         return 1;
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.expr;
071         else index--;
072    
073         throw new IndexOutOfBoundsException("AST child index " + indexPre);
074      }   //@ nowarn Exception;
075    
076      public final /*@non_null*/String toString() {
077         return "[GuardExpr"
078            + " expr = " + this.expr
079            + " locPragmaDecl = " + this.locPragmaDecl
080            + "]";
081      }
082    
083      public final int getTag() {
084         return TagConstants.GUARDEXPR;
085      }
086    
087      public final void accept(javafe.ast.Visitor v) { 
088        if (v instanceof Visitor) ((Visitor)v).visitGuardExpr(this);
089      }
090    
091      public final Object accept(javafe.ast.VisitorArgResult v, Object o) { 
092        if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitGuardExpr(this, o); else return null;
093      }
094    
095      public void check() {
096         this.expr.check();
097      }
098    
099      //@ ensures \result != null;
100      public static GuardExpr make(/*@ non_null @*/ Expr expr, int locPragmaDecl) {
101         GuardExpr result = new GuardExpr(expr, locPragmaDecl);
102         return result;
103      }
104    }