    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    /**
    023     * Represents a simple name that is bound to a local variable declaration.
    024     * Is created only by the name resolution code, not by the parser.
    025     */
    026
    027    public class VariableAccess extends Expr
    028    {
    029      public /*@ non_null @*/ Identifier id;
    030
    031      //@ invariant loc != javafe.util.Location.NULL;
    032      public int loc;
    033
    034
    035      //@ invariant decl.id==id;
    036      public /*@ non_null @*/ GenericVarDecl decl;
    037
    038      private void postCheck() {
    039          Assert.notNull(decl);
    040          Assert.notFalse(id == decl.id);
    041          // Any other invariants here...???
    042      }
    043      public int getStartLoc() { return loc; }
    044
    045      //@ requires decl.id == id;
    046      //
    047      //@ requires loc != javafe.util.Location.NULL;
    048      //@ ensures \result != null;
    049      public static VariableAccess make(/*@ non_null @*/ Identifier id,
    050                                        int loc,
    051                                        /*@ non_null @*/ GenericVarDecl decl) {
    052            //@ set I_will_establish_invariants_afterwards = true;
    053            VariableAccess result = new VariableAccess();
    054            result.id = id;
    055            result.loc = loc;
    056            result.decl = decl;
    057            return result;
    058      }
    059
    060
    061    // Generated boilerplate constructors:
    062
    063      /**
    064       * Construct a raw VariableAccess whose class invariant(s) have not
    065       * yet been established.  It is the caller's job to
    066       * initialize the returned node's fields so that any
    067       * class invariants hold.
    068       */
    069      //@ requires I_will_establish_invariants_afterwards;
    070      protected VariableAccess() {}    //@ nowarn Invariant,NonNullInit;
    071
    072
    073    // Generated boilerplate methods:
    074
    075      public final int childCount() {
    076         return 1;
    077      }
    078
    079      public final Object childAt(int index) {
    080              /*throws IndexOutOfBoundsException*/
    081         if (index < 0)
    082            throw new IndexOutOfBoundsException("AST child index " + index);
    083         int indexPre = index;
    084
    085         int sz;
    086
    087         if (index == 0) return this.id;
    088         else index--;
    089
    090         throw new IndexOutOfBoundsException("AST child index " + indexPre);
    091      }   //@ nowarn Exception;
    092
    093      public final String toString() {
    094         return "[VariableAccess"
    095            + " id = " + this.id
    096            + " loc = " + this.loc
    097            + "]";
    098      }
    099
    100      public final int getTag() {
    101         return TagConstants.VARIABLEACCESS;
    102      }
    103
    104      public final void accept(Visitor v) { v.visitVariableAccess(this); }
    105
    106      public final Object accept(VisitorArgResult v, Object o) {return v.visitVariableAccess(this, o); }
    107
    108      public void check() {
    109         super.check();
    110         if (this.id == null) throw new RuntimeException();
    111         postCheck();
    112      }
    113
    114    }