Bringing Clean Code to Large Scale Legacy C++ Applications von Arne Mertz
Due to the complexity of the language and the presence of some low level language features, "Clean C++" seems to be an oxymoron for many developers.
The lack of good refactoring tools even in modern C++ IDEs makes drastic code changes tedious. Legacy applications with large code bases grown over several years tend to suffer from underdeveloped or missing unit and integration tests. Development teams maintaining such code bases resign over time and adopt "don't touch it, you'll break it" policies. Nevertheless it is possible to write clean C++, to refactor even large C++ code bases and cover critical parts with automated tests. The key elements to successfully regain control over code quality are a dedicated team and a set of properly sized and prioritized steps towards that goal.
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