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