001    // -*- mode: java -*-
002    /* Copyright 2000, 2001, Compaq Computer Corporation */
003    
004    /* IF THIS IS A JAVA FILE, DO NOT EDIT IT!  
005    
006       Most Java files in this directory which are part of the Javafe AST
007       are automatically generated using the astgen comment (see
008       ESCTools/Javafe/astgen) from the input file 'hierarchy.h'.  If you
009       wish to modify AST classes or introduce new ones, modify
010       'hierarchy.j.'
011     */
012    
013    package javafe.ast;
014    
015    import javafe.util.Assert;
016    import javafe.util.Location;
017    import javafe.util.ErrorSet;
018    
019    // Convention: unless otherwise noted, integer fields named "loc" refer
020    // to the location of the first character of the syntactic unit
021    
022    
023    public class SwitchStmt extends GenericBlockStmt
024    {
025      public /*@ non_null @*/ Expr expr;
026    
027      //@ invariant loc != javafe.util.Location.NULL;
028      public int loc;
029    
030    
031      //@ public represents startLoc <- loc;
032      public /*@ pure @*/ int getStartLoc() { return loc; }
033    
034    
035    // Generated boilerplate constructors:
036    
037      //@ ensures this.stmts == stmts;
038      //@ ensures this.locOpenBrace == locOpenBrace;
039      //@ ensures this.locCloseBrace == locCloseBrace;
040      //@ ensures this.expr == expr;
041      //@ ensures this.loc == loc;
042      protected SwitchStmt(/*@ non_null @*/ StmtVec stmts, int locOpenBrace, int locCloseBrace, /*@ non_null @*/ Expr expr, int loc) {
043         super(stmts, locOpenBrace, locCloseBrace);
044         this.expr = expr;
045         this.loc = loc;
046      }
047    
048    // Generated boilerplate methods:
049    
050      public final int childCount() {
051         int sz = 0;
052         if (this.stmts != null) sz += this.stmts.size();
053         return sz + 1;
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         sz = (this.stmts == null ? 0 : this.stmts.size());
065         if (0 <= index && index < sz)
066            return this.stmts.elementAt(index);
067         else index -= sz;
068    
069         if (index == 0) return this.expr;
070         else index--;
071    
072         throw new IndexOutOfBoundsException("AST child index " + indexPre);
073      }   //@ nowarn Exception;
074    
075      public final /*@non_null*/String toString() {
076         return "[SwitchStmt"
077            + " stmts = " + this.stmts
078            + " locOpenBrace = " + this.locOpenBrace
079            + " locCloseBrace = " + this.locCloseBrace
080            + " expr = " + this.expr
081            + " loc = " + this.loc
082            + "]";
083      }
084    
085      public final int getTag() {
086         return TagConstants.SWITCHSTMT;
087      }
088    
089      public final void accept(Visitor v) { v.visitSwitchStmt(this); }
090    
091      public final Object accept(VisitorArgResult v, Object o) {return v.visitSwitchStmt(this, o); }
092    
093      public void check() {
094         super.check();
095         for(int i = 0; i < this.stmts.size(); i++)
096            this.stmts.elementAt(i).check();
097         this.expr.check();
098      }
099    
100      //@ requires locOpenBrace != javafe.util.Location.NULL;
101      //@ requires locCloseBrace != javafe.util.Location.NULL;
102      //@ requires loc != javafe.util.Location.NULL;
103      //@ ensures \result != null;
104      public static SwitchStmt make(/*@ non_null @*/ StmtVec stmts, int locOpenBrace, int locCloseBrace, /*@ non_null @*/ Expr expr, int loc) {
105         SwitchStmt result = new SwitchStmt(stmts, locOpenBrace, locCloseBrace, expr, loc);
106         return result;
107      }
108    }