This paper presents a simple, general, and efficient solution to the old problem of ‘‘wrapping’’ calls to an object in pairs of prefix and suffix code. The solution is also non-intrusive, applies to existing classes, allows the use of several prefix/suffix pairs, and can be implemented in 15 simple lines of Standard C++. A robust version of the wrapper is also presented. The claim of efficiency is backed by measurement. The paper is organized around a series of examples evolving the basic idea into a final robust template class.
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