    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 escjava.ast;
    013
    014    import java.util.Hashtable;
    015    import java.util.Set;
    016    import java.util.ArrayList;
    017
    018    import javafe.ast.*;
    019    import javafe.util.Assert;
    020    import javafe.util.Location;
    021    import escjava.ParsedRoutineSpecs;
    022
    023    // Convention: unless otherwise noted, integer fields named "loc" refer
    024    // to the location of the first character of the syntactic unit
    025
    026    //# TagBase javafe.tc.TagConstants.LAST_TAG + 1
    027    //# VisitorRoot javafe.ast.Visitor
    028
    029
    030    public class GuardExpr extends Expr
    031    {
    032      public /*@ non_null @*/ Expr expr;
    033
    034      public int locPragmaDecl;
    035
    036
    037      public int getStartLoc() { return expr.getStartLoc(); }
    038      public int getEndLoc() { return expr.getEndLoc(); }
    039
    040
    041    // Generated boilerplate constructors:
    042
    043      /**
    044       * Construct a raw GuardExpr whose class invariant(s) have not
    045       * yet been established.  It is the caller's job to
    046       * initialize the returned node's fields so that any
    047       * class invariants hold.
    048       */
    049      //@ requires I_will_establish_invariants_afterwards;
    050      protected GuardExpr() {}    //@ nowarn Invariant,NonNullInit;
    051
    052
    053    // Generated boilerplate methods:
    054
    055      public final int childCount() {
    056         return 1;
    057      }
    058
    059      public final Object childAt(int index) {
    060              /*throws IndexOutOfBoundsException*/
    061         if (index < 0)
    062            throw new IndexOutOfBoundsException("AST child index " + index);
    063         int indexPre = index;
    064
    065         int sz;
    066
    067         if (index == 0) return this.expr;
    068         else index--;
    069
    070         throw new IndexOutOfBoundsException("AST child index " + indexPre);
    071      }   //@ nowarn Exception;
    072
    073      public final String toString() {
    074         return "[GuardExpr"
    075            + " expr = " + this.expr
    076            + " locPragmaDecl = " + this.locPragmaDecl
    077            + "]";
    078      }
    079
    080      public final int getTag() {
    081         return TagConstants.GUARDEXPR;
    082      }
    083
    084      public final void accept(javafe.ast.Visitor v) {
    085        if (v instanceof Visitor) ((Visitor)v).visitGuardExpr(this);
    086      }
    087
    088      public final Object accept(javafe.ast.VisitorArgResult v, Object o) {
    089        if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitGuardExpr(this, o); else return null;
    090      }
    091
    092      public void check() {
    093         this.expr.check();
    094      }
    095
    096      //@ ensures \result != null;
    097      public static GuardExpr make(/*@ non_null @*/ Expr expr, int locPragmaDecl) {
    098         //@ set I_will_establish_invariants_afterwards = true;
    099         GuardExpr result = new GuardExpr();
    100         result.expr = expr;
    101         result.locPragmaDecl = locPragmaDecl;
    102         return result;
    103      }
    104    }