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 javafe.ast;
014    
015    import javafe.util.Assert;
016    import javafe.util.Location;
017    import javafe.util.ErrorSet;
018    
019    // Convention: unless otherwise noted, integer fields named "loc" refer
020    // to the location of the first character of the syntactic unit
021    
022    
023    public class ThrowStmt extends Stmt
024    {
025      public /*@ non_null @*/ Expr expr;
026    
027      //@ invariant loc != javafe.util.Location.NULL;
028      public int loc;
029    
030    
031      //@ public represents startLoc <- loc;
032      public /*@ pure @*/ int getStartLoc() { return loc; }
033      //@ also public normal_behavior
034      //@ ensures \result == expr.getEndLoc();
035      public /*@ pure @*/ int getEndLoc() { return expr.getEndLoc(); }
036    
037    
038    // Generated boilerplate constructors:
039    
040      //@ ensures this.expr == expr;
041      //@ ensures this.loc == loc;
042      protected ThrowStmt(/*@ non_null @*/ Expr expr, int loc) {
043         super();
044         this.expr = expr;
045         this.loc = loc;
046      }
047    
048    // Generated boilerplate methods:
049    
050      public final int childCount() {
051         return 1;
052      }
053    
054      public final Object childAt(int index) {
055              /*throws IndexOutOfBoundsException*/
056         if (index < 0)
057            throw new IndexOutOfBoundsException("AST child index " + index);
058         int indexPre = index;
059    
060         int sz;
061    
062         if (index == 0) return this.expr;
063         else index--;
064    
065         throw new IndexOutOfBoundsException("AST child index " + indexPre);
066      }   //@ nowarn Exception;
067    
068      public final /*@non_null*/String toString() {
069         return "[ThrowStmt"
070            + " expr = " + this.expr
071            + " loc = " + this.loc
072            + "]";
073      }
074    
075      public final int getTag() {
076         return TagConstants.THROWSTMT;
077      }
078    
079      public final void accept(Visitor v) { v.visitThrowStmt(this); }
080    
081      public final Object accept(VisitorArgResult v, Object o) {return v.visitThrowStmt(this, o); }
082    
083      public void check() {
084         super.check();
085         this.expr.check();
086      }
087    
088      //@ requires loc != javafe.util.Location.NULL;
089      //@ ensures \result != null;
090      public static ThrowStmt make(/*@ non_null @*/ Expr expr, int loc) {
091         ThrowStmt result = new ThrowStmt(expr, loc);
092         return result;
093      }
094    }