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 CastExpr extends Expr
023    {
024      public /*@ non_null @*/ Expr expr;
025    
026      //@ invariant type.syntax;
027      public /*@ non_null @*/ Type type;
028    
029      //@ invariant locOpenParen != javafe.util.Location.NULL;
030      public int locOpenParen;
031    
032      //@ invariant locCloseParen != javafe.util.Location.NULL;
033      public int locCloseParen;
034    
035      public int getStartLoc() { return locOpenParen; }
036      public int getEndLoc() { return expr.getEndLoc(); }
037    
038    
039    // Generated boilerplate constructors:
040    
041      /**
042       * Construct a raw CastExpr whose class invariant(s) have not
043       * yet been established.  It is the caller's job to
044       * initialize the returned node's fields so that any
045       * class invariants hold.
046       */
047      //@ requires I_will_establish_invariants_afterwards;
048      protected CastExpr() {}    //@ nowarn Invariant,NonNullInit;
049    
050    
051    // Generated boilerplate methods:
052    
053      public final int childCount() {
054         return 2;
055      }
056    
057      public final Object childAt(int index) {
058              /*throws IndexOutOfBoundsException*/
059         if (index < 0)
060            throw new IndexOutOfBoundsException("AST child index " + index);
061         int indexPre = index;
062    
063         int sz;
064    
065         if (index == 0) return this.expr;
066         else index--;
067    
068         if (index == 0) return this.type;
069         else index--;
070    
071         throw new IndexOutOfBoundsException("AST child index " + indexPre);
072      }   //@ nowarn Exception;
073    
074      public final String toString() {
075         return "[CastExpr"
076            + " expr = " + this.expr
077            + " type = " + this.type
078            + " locOpenParen = " + this.locOpenParen
079            + " locCloseParen = " + this.locCloseParen
080            + "]";
081      }
082    
083      public final int getTag() {
084         return TagConstants.CASTEXPR;
085      }
086    
087      public final void accept(Visitor v) { v.visitCastExpr(this); }
088    
089      public final Object accept(VisitorArgResult v, Object o) {return v.visitCastExpr(this, o); }
090    
091      public void check() {
092         super.check();
093         this.expr.check();
094         this.type.check();
095      }
096    
097      //@ requires type.syntax;
098      //@ requires locOpenParen != javafe.util.Location.NULL;
099      //@ requires locCloseParen != javafe.util.Location.NULL;
100      //@ ensures \result != null;
101      public static CastExpr make(/*@ non_null @*/ Expr expr, /*@ non_null @*/ Type type, int locOpenParen, int locCloseParen) {
102         //@ set I_will_establish_invariants_afterwards = true;
103         CastExpr result = new CastExpr();
104         result.expr = expr;
105         result.type = type;
106         result.locOpenParen = locOpenParen;
107         result.locCloseParen = locCloseParen;
108         return result;
109      }
110    }