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 javafe.ast;
013    
014    import javafe.util.Assert;
015    import javafe.util.Location;
016    import javafe.util.ErrorSet;
017    
018    // Convention: unless otherwise noted, integer fields named "loc" refer
019    // to the location of the first character of the syntactic unit
020    
021    
022    public class ThrowStmt extends Stmt
023    {
024      public /*@ non_null @*/ Expr expr;
025    
026      //@ invariant loc != javafe.util.Location.NULL;
027      public int loc;
028    
029      public int getStartLoc() { return loc; }
030      public int getEndLoc() { return expr.getEndLoc(); }
031    
032    
033    // Generated boilerplate constructors:
034    
035      /**
036       * Construct a raw ThrowStmt whose class invariant(s) have not
037       * yet been established.  It is the caller's job to
038       * initialize the returned node's fields so that any
039       * class invariants hold.
040       */
041      //@ requires I_will_establish_invariants_afterwards;
042      protected ThrowStmt() {}    //@ nowarn Invariant,NonNullInit;
043    
044    
045    // Generated boilerplate methods:
046    
047      public final int childCount() {
048         return 1;
049      }
050    
051      public final Object childAt(int index) {
052              /*throws IndexOutOfBoundsException*/
053         if (index < 0)
054            throw new IndexOutOfBoundsException("AST child index " + index);
055         int indexPre = index;
056    
057         int sz;
058    
059         if (index == 0) return this.expr;
060         else index--;
061    
062         throw new IndexOutOfBoundsException("AST child index " + indexPre);
063      }   //@ nowarn Exception;
064    
065      public final String toString() {
066         return "[ThrowStmt"
067            + " expr = " + this.expr
068            + " loc = " + this.loc
069            + "]";
070      }
071    
072      public final int getTag() {
073         return TagConstants.THROWSTMT;
074      }
075    
076      public final void accept(Visitor v) { v.visitThrowStmt(this); }
077    
078      public final Object accept(VisitorArgResult v, Object o) {return v.visitThrowStmt(this, o); }
079    
080      public void check() {
081         super.check();
082         this.expr.check();
083      }
084    
085      //@ requires loc != javafe.util.Location.NULL;
086      //@ ensures \result != null;
087      public static ThrowStmt make(/*@ non_null @*/ Expr expr, int loc) {
088         //@ set I_will_establish_invariants_afterwards = true;
089         ThrowStmt result = new ThrowStmt();
090         result.expr = expr;
091         result.loc = loc;
092         return result;
093      }
094    }