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Message: [QUOTE="Nick Keighley, post: 4225120"] I think the obvious reason is that they have different semantics. Using & may preclude the easy replacement of a variable with a function. if (bufferFull & LatchDown) flushAll(); if (bufferFull() & LatchDown()) flushAll(); now we have to careful that the functions don't have side effects. And that the Latchdown() function works even when the buffer is not full. And that unnecessary calls to latchDown() aren't too expensive. The rule is (in this and many other contexts) use the clearest and most appropriate semantic form to achieve your ends. [/QUOTE]