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 ParenExpr extends Expr
023    {
024      public /*@ non_null @*/ Expr expr;
025    
026      //@ invariant locOpenParen != javafe.util.Location.NULL;
027      public int locOpenParen;
028    
029      //@ invariant locCloseParen != javafe.util.Location.NULL;
030      public int locCloseParen;
031    
032      public int getStartLoc() { return locOpenParen; }
033      public int getEndLoc() { return locCloseParen; }
034    
035    
036    // Generated boilerplate constructors:
037    
038      /**
039       * Construct a raw ParenExpr whose class invariant(s) have not
040       * yet been established.  It is the caller's job to
041       * initialize the returned node's fields so that any
042       * class invariants hold.
043       */
044      //@ requires I_will_establish_invariants_afterwards;
045      protected ParenExpr() {}    //@ nowarn Invariant,NonNullInit;
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 String toString() {
069         return "[ParenExpr"
070            + " expr = " + this.expr
071            + " locOpenParen = " + this.locOpenParen
072            + " locCloseParen = " + this.locCloseParen
073            + "]";
074      }
075    
076      public final int getTag() {
077         return TagConstants.PARENEXPR;
078      }
079    
080      public final void accept(Visitor v) { v.visitParenExpr(this); }
081    
082      public final Object accept(VisitorArgResult v, Object o) {return v.visitParenExpr(this, o); }
083    
084      public void check() {
085         super.check();
086         this.expr.check();
087      }
088    
089      //@ requires locOpenParen != javafe.util.Location.NULL;
090      //@ requires locCloseParen != javafe.util.Location.NULL;
091      //@ ensures \result != null;
092      public static ParenExpr make(/*@ non_null @*/ Expr expr, int locOpenParen, int locCloseParen) {
093         //@ set I_will_establish_invariants_afterwards = true;
094         ParenExpr result = new ParenExpr();
095         result.expr = expr;
096         result.locOpenParen = locOpenParen;
097         result.locCloseParen = locCloseParen;
098         return result;
099      }
100    }