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 CondExpr extends Expr
023    {
024      public /*@ non_null @*/ Expr test;
025    
026      public /*@ non_null @*/ Expr thn;
027    
028      public /*@ non_null @*/ Expr els;
029    
030      //@ invariant locQuestion != javafe.util.Location.NULL;
031      public int locQuestion;
032    
033      //@ invariant locColon != javafe.util.Location.NULL;
034      public int locColon;
035    
036      public int getStartLoc() { return test.getStartLoc(); }
037      public int getEndLoc() { 
038        int thenL = thn.getEndLoc();
039        int elseL = els.getEndLoc();
040        return Math.max(thenL, elseL);
041      }
042    
043    
044    // Generated boilerplate constructors:
045    
046      /**
047       * Construct a raw CondExpr whose class invariant(s) have not
048       * yet been established.  It is the caller's job to
049       * initialize the returned node's fields so that any
050       * class invariants hold.
051       */
052      //@ requires I_will_establish_invariants_afterwards;
053      protected CondExpr() {}    //@ nowarn Invariant,NonNullInit;
054    
055    
056    // Generated boilerplate methods:
057    
058      public final int childCount() {
059         return 3;
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.test;
071         else index--;
072    
073         if (index == 0) return this.thn;
074         else index--;
075    
076         if (index == 0) return this.els;
077         else index--;
078    
079         throw new IndexOutOfBoundsException("AST child index " + indexPre);
080      }   //@ nowarn Exception;
081    
082      public final String toString() {
083         return "[CondExpr"
084            + " test = " + this.test
085            + " thn = " + this.thn
086            + " els = " + this.els
087            + " locQuestion = " + this.locQuestion
088            + " locColon = " + this.locColon
089            + "]";
090      }
091    
092      public final int getTag() {
093         return TagConstants.CONDEXPR;
094      }
095    
096      public final void accept(Visitor v) { v.visitCondExpr(this); }
097    
098      public final Object accept(VisitorArgResult v, Object o) {return v.visitCondExpr(this, o); }
099    
100      public void check() {
101         super.check();
102         this.test.check();
103         this.thn.check();
104         this.els.check();
105      }
106    
107      //@ requires locQuestion != javafe.util.Location.NULL;
108      //@ requires locColon != javafe.util.Location.NULL;
109      //@ ensures \result != null;
110      public static CondExpr make(/*@ non_null @*/ Expr test, /*@ non_null @*/ Expr thn, /*@ non_null @*/ Expr els, int locQuestion, int locColon) {
111         //@ set I_will_establish_invariants_afterwards = true;
112         CondExpr result = new CondExpr();
113         result.test = test;
114         result.thn = thn;
115         result.els = els;
116         result.locQuestion = locQuestion;
117         result.locColon = locColon;
118         return result;
119      }
120    }