Somewhat related, in the Io language, I was surprised to find that the expression "-23 abs" evaluates to "-23" not +23. The language desugars the expression to "0-(23 abs)". I think what threw me was the fact that Io uses a space rather than a dot for member selectors. No one would be surprised that C++ evaluates "-numObj.abs()" that way.
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Somewhat related, in the Io language, I was surprised to find that the expression "-23 abs" evaluates to "-23" not +23. The language desugars the expression to "0-(23 abs)". I think what threw me was the fact that Io uses a space rather than a dot for member selectors. No one would be surprised that C++ evaluates "-numObj.abs()" that way.