    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 ExprStmtPragma extends StmtPragma
    031    {
    032      public int tag;
    033
    034      public /*@ non_null @*/ Expr expr;
    035
    036      public Expr label;
    037
    038      public int loc;
    039
    040
    041      public final int getTag() { return tag; }
    042
    043      private void postCheck() {
    044        boolean goodtag = (tag == TagConstants.ASSERT ||
    045                           tag == TagConstants.ASSUME ||
    046                           tag == TagConstants.DECREASES ||
    047                           tag == TagConstants.DECREASING ||
    048                           tag == TagConstants.MAINTAINING ||
    049                           tag == TagConstants.LOOP_INVARIANT ||
    050                           tag == TagConstants.LOOP_PREDICATE);
    051        Assert.notFalse(goodtag);
    052      }
    053
    054      public int getStartLoc() { return loc; }
    055      public int getEndLoc() { return expr.getEndLoc(); }
    056
    057
    058    // Generated boilerplate constructors:
    059
    060      /**
    061       * Construct a raw ExprStmtPragma whose class invariant(s) have not
    062       * yet been established.  It is the caller's job to
    063       * initialize the returned node's fields so that any
    064       * class invariants hold.
    065       */
    066      //@ requires I_will_establish_invariants_afterwards;
    067      protected ExprStmtPragma() {}    //@ nowarn Invariant,NonNullInit;
    068
    069
    070    // Generated boilerplate methods:
    071
    072      public final int childCount() {
    073         return 2;
    074      }
    075
    076      public final Object childAt(int index) {
    077              /*throws IndexOutOfBoundsException*/
    078         if (index < 0)
    079            throw new IndexOutOfBoundsException("AST child index " + index);
    080         int indexPre = index;
    081
    082         int sz;
    083
    084         if (index == 0) return this.expr;
    085         else index--;
    086
    087         if (index == 0) return this.label;
    088         else index--;
    089
    090         throw new IndexOutOfBoundsException("AST child index " + indexPre);
    091      }   //@ nowarn Exception;
    092
    093      public final String toString() {
    094         return "[ExprStmtPragma"
    095            + " tag = " + this.tag
    096            + " expr = " + this.expr
    097            + " label = " + this.label
    098            + " loc = " + this.loc
    099            + "]";
    100      }
    101
    102      public final void accept(javafe.ast.Visitor v) {
    103        if (v instanceof Visitor) ((Visitor)v).visitExprStmtPragma(this);
    104      }
    105
    106      public final Object accept(javafe.ast.VisitorArgResult v, Object o) {
    107        if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitExprStmtPragma(this, o); else return null;
    108      }
    109
    110      public void check() {
    111         this.expr.check();
    112         if (this.label != null)
    113            this.label.check();
    114         postCheck();
    115      }
    116
    117      //@ ensures \result != null;
    118      public static ExprStmtPragma make(int tag, /*@ non_null @*/ Expr expr, Expr label, int loc) {
    119         //@ set I_will_establish_invariants_afterwards = true;
    120         ExprStmtPragma result = new ExprStmtPragma();
    121         result.tag = tag;
    122         result.expr = expr;
    123         result.label = label;
    124         result.loc = loc;
    125         return result;
    126      }
    127    }