need cast from int to real operation in symbolic package

[Stephen Siegel]

I _think_ all this operation needs to do is take a symbolic expression and return a symbolic expression which is identical except the SymType is rational instead of int.

[ywei]

A method called intToRational() is added to SymUniverseIF to convert an integer type expression to rational type.

[Stephen Siegel]

I'm getting the CloneNotSupportedException. I am running the MeanTestLoopTest. I have not yet checked in my code, but will soon. This is a great example of where a unit test would help. A unit test should be created that tests this method and added to the test source tree.

	public SymExpression intToRational(SymExpression expr)
	{
		if(!(expr.getType() instanceof SymInteger))
		{
			throw new RuntimeException("The argument of the integer to rationl cast operation must have integer type "
					+ "instead of " + expr.getType());
		}
		SymExpression newExpr = null;
		try
		{
			newExpr = (SymExpression)(super.clone());
		}
		catch(CloneNotSupportedException e)
		{
			e.printStackTrace();
		}
		newExpr.setType(this.rationalType);
		return newExpr;
	}

[ywei]

Have you checked in the code to cause this problem?

[ywei]

I mean the code that caused the exception you mentioned above.

[Stephen Siegel]

This is done in the new symbolic package in v. 1.0.