Package edu.mit.csail.sdg.alloy4

Examples of edu.mit.csail.sdg.alloy4.Util$StringPref

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    //============================================================================================================//

    /** Construct an ExprChoice node. */
    public static Expr make(Pos pos, ConstList<Expr> choices, ConstList<String> reasons) {
        if (choices.size()==0) return new ExprBad(pos, "", new ErrorType(pos, "This expression failed to be typechecked."));
        if (choices.size()==1 && choices.get(0).errors.isEmpty()) return choices.get(0); // Shortcut
        Type type=EMPTY;
        boolean first=true;
        long weight=0;
        for(Expr x:choices) {
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            txt="\nThis name cannot be resolved; its relevant type does not intersect with any of the following candidates:";
            re = reasons;
        }
        StringBuilder msg = new StringBuilder(txt);
        for(String r:re) msg.append('\n').append(r);
        return new ExprBad(pos, toString(), new ErrorType(pos, msg.toString()));
    }
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    }

    /** {@inheritDoc} */
    @Override final<T> T accept(VisitReturn<T> visitor) throws Err {
        if (!errors.isEmpty()) throw errors.pick();
        throw new ErrorType(span(), "This expression failed to be resolved.");
    }
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    }

    /** Return the relational join between this and that (throws ErrorType if this.arity==1 and that.arity==1) */
    public SimTupleset join(SimTupleset that) throws ErrorType {
       if (empty() || that.empty()) return EMPTY;
       if (arity()==1 && that.arity()==1) throw new ErrorType("Cannot join two unary relations.");
       TempList<SimTuple> ans = new TempList<SimTuple>();
       for(SimTuple a: this) for(SimTuple b: that) if (a.tail()==b.head()) {
          SimTuple c = a.join(b);
          if (!ans.contains(c)) ans.add(c);
       }
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            ambiguous = ambiguous || x.ambiguous;
            errs = errs.make(x.errors);
            weight = weight + x.weight;
            if (x.mult!=0) errs = errs.make(new ErrorSyntax(x.span(), "Multiplicity expression not allowed here."));
            if (a>0 && x.errors.isEmpty() && !x.type.hasArity(a))
              errs = errs.make(new ErrorType(x.span(), "This should have arity "+a+" but instead its possible type(s) are "+x.type));
            newargs.add(x);
        }
        Type t=Type.FORMULA;
        if (!fun.isPred && errs.size()==0) {
            final Type tt = fun.returnDecl.type;
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        }
        if (op==Op.TOTALORDER) {
           if (newargs.size()!=3) {
              errs = errs.make(new ErrorSyntax(pos, "The builtin pred/totalOrder[] predicate must be called with exactly three arguments."));
           } else if (errs.isEmpty()) {
              if (!newargs.get(0).type.hasArity(1)) errs = errs.make(new ErrorType(pos, "The first argument to pred/totalOrder must be unary."));
              if (!newargs.get(1).type.hasArity(1)) errs = errs.make(new ErrorType(pos, "The second argument to pred/totalOrder must be unary."));
              if (!newargs.get(2).type.hasArity(2)) errs = errs.make(new ErrorType(pos, "The third argument to pred/totalOrder must be binary."));
           }
        }
        if (op==Op.DISJOINT) {
           if (newargs.size()<2) errs = errs.make(new ErrorSyntax(pos, "The builtin disjoint[] predicate must be called with at least two arguments."));
           if (commonArity==EMPTY) errs = errs.make(new ErrorType(pos, "The builtin predicate disjoint[] cannot be used among expressions of different arities."));
        }
        return new ExprList(pos, closingBracket, op, ambiguous, newargs.makeConst(), weight, errs);
    }
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     * @throws ErrorType if is_int is true
     * @throws ErrorType if is_bool is true
     */
    public Expr toExpr() throws Err {
        int arity = arity();
        if (is_int || is_bool || arity<1) throw new ErrorType("Cannot convert this type into a bounding expression.");
        Expr ans = null;
        for(ProductType pt:this) {
            Expr pro = null;
            for(int i=0; i<arity; i++) if (pro==null) pro=pt.types[i]; else pro=pro.product(pt.types[i]);
            if (ans==null) ans=pro; else ans = ans.plus(pro);
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   /** Convenience method that generates a type warning with "msg" as the message,
    * and includes the left and right bounding types in the message.
    */
   private ErrorWarning warn(String msg) {
      return new ErrorWarning(pos, msg
            +"\nLeft type = " + Type.removesBoolAndInt(left.type)
            +"\nRight type = " + Type.removesBoolAndInt(right.type));
   }
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   /** Convenience method that generates a type warning with "msg" as the message,
    * and includes the parent's relevance type, as well as the left and right bounding types in the message.
    */
   private ErrorWarning warn(String msg, Type parent) {
      return new ErrorWarning(pos, msg
         + "\nParent's relevant type = " + Type.removesBoolAndInt(parent)
         + "\nLeft type = " + Type.removesBoolAndInt(left.type)
         + "\nRight type = " + Type.removesBoolAndInt(right.type));
   }
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   //============================================================================================================//

   /** {@inheritDoc} */
   @Override public Expr resolve(Type p, Collection<ErrorWarning> warns) {
      if (errors.size()>0) return this;
      ErrorWarning w=null;
      Type a=left.type, b=right.type;
      switch(op) {
        case MUL: case DIV: case REM: case LT: case LTE: case GT: case GTE: case SHL: case SHR: case SHA:
        case NOT_LTE: case NOT_GTE: case NOT_LT: case NOT_GT: {
           a=(b=Type.INT);
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  • edu.mit.csail.sdg.alloy4compiler.ast.ExprBadJoin
  • edu.mit.csail.sdg.alloy4compiler.ast.ExprBinary
  • edu.mit.csail.sdg.alloy4compiler.ast.ExprCall
  • edu.mit.csail.sdg.alloy4compiler.ast.ExprChoice
  • edu.mit.csail.sdg.alloy4compiler.ast.ExprITE
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