[tuckerman]

Post C++11 you can just do (like this:)), no extra space needed before the last parenthesis.

[mghackerlady]

But then it looks like I'm using a double smiley[0] which I do actually use on occasion

[0] :))

[jasomill]

You could use a bracket in the smiley (like this :]) as is sometimes used when nesting parentheticals.

[mghackerlady]

I sometimes do the opposite and use brackets for the parentheticals [like this :)]