I am defining a macro, BOOST_PARAMETER_KEYWORD(tag_namespace, name) that declares a keyword for the Parameter library. It has to be used at namespace scope. I have the option to define it so that correct usage requires a trailing semicolon, or so that the trailing semicolon is forbidden. Unfortunately I don't have the ability to make it optional. Which should I choose? IMO there's no chance of confusing it with a function call, since a function call would be illegal in the context in which it's used, and people are naturally more likely to add a semicolon without thinking about it, and if I design the macro so that a semicolon is required it will interact more smoothly with editors and pretty-printers. So I can't see any good reason not to require the semicolon. Arguments? -- Dave Abrahams Boost Consulting www.boost-consulting.com