What type of details about andrei alexandrescu can be gathered from the following bio? Bio: andrei alexandrescu is a romanian american c++ and d language programmer and author . he is particularly known for his pioneering work on policy-based design implemented via template metaprogramming . these ideas are articulated in his book '' modern c++ design '' and were first implemented in his programming library , loki . he also implemented the '' move constructors '' concept in his mojo library . he contributed to the '' c/c + + users journal '' under the byline '' generic <programming> '' . alexandrescu worked as a research scientist at facebook , before departing the company in august 2015 in order to focus on developing the d programming language . he became an american citizen in august 2014 . he is a developer of the d programming language .
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