    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 SeqCmd extends GuardedCmd
    031    {
    032      // denotes g1 ; g2 ; ... ; gn
    033      public /*@ non_null @*/ GuardedCmdVec cmds;
    034
    035
    036      private void postCheck() {
    037        Assert.notFalse(1 < cmds.size());
    038      }
    039
    040      public int getStartLoc() { return cmds.elementAt(0).getStartLoc(); }
    041      public int getEndLoc() { return cmds.elementAt(cmds.size()-1).getEndLoc(); }
    042
    043
    044    // Generated boilerplate constructors:
    045
    046      /**
    047       * Construct a raw SeqCmd 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 SeqCmd() {}    //@ nowarn Invariant,NonNullInit;
    054
    055
    056    // Generated boilerplate methods:
    057
    058      public final int childCount() {
    059         int sz = 0;
    060         if (this.cmds != null) sz += this.cmds.size();
    061         return sz + 0;
    062      }
    063
    064      public final Object childAt(int index) {
    065              /*throws IndexOutOfBoundsException*/
    066         if (index < 0)
    067            throw new IndexOutOfBoundsException("AST child index " + index);
    068         int indexPre = index;
    069
    070         int sz;
    071
    072         sz = (this.cmds == null ? 0 : this.cmds.size());
    073         if (0 <= index && index < sz)
    074            return this.cmds.elementAt(index);
    075         else index -= sz;
    076
    077         throw new IndexOutOfBoundsException("AST child index " + indexPre);
    078      }   //@ nowarn Exception;
    079
    080      public final String toString() {
    081         return "[SeqCmd"
    082            + " cmds = " + this.cmds
    083            + "]";
    084      }
    085
    086      public final int getTag() {
    087         return TagConstants.SEQCMD;
    088      }
    089
    090      public final void accept(javafe.ast.Visitor v) {
    091        if (v instanceof Visitor) ((Visitor)v).visitSeqCmd(this);
    092      }
    093
    094      public final Object accept(javafe.ast.VisitorArgResult v, Object o) {
    095        if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitSeqCmd(this, o); else return null;
    096      }
    097
    098      public void check() {
    099         super.check();
    100         for(int i = 0; i < this.cmds.size(); i++)
    101            this.cmds.elementAt(i).check();
    102         postCheck();
    103      }
    104
    105      //@ ensures \result != null;
    106      public static SeqCmd make(/*@ non_null @*/ GuardedCmdVec cmds) {
    107         //@ set I_will_establish_invariants_afterwards = true;
    108         SeqCmd result = new SeqCmd();
    109         result.cmds = cmds;
    110         return result;
    111      }
    112    }