This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
There are conversions that take place during the evaluation of the expression. "Widening", etc. The language specification talks about it in detail. But simply put, most things will be "widened" to the greater number of bits required and then the evaluation will take place.