2017 LLVM Developers’ Meeting: S. Callanan “eval() in C++ ”

http://www.LLVM.org/devmtg/2017-10/ — eval() in C++ - Sean Callanan Slides: — Runtime expression evaluation is a language feature, but to work right it requires support from the whole runtime stack. If you get it right, it can enhance existing software by allowing dynamic generation of optimized parsers for data formats encountered at runtime; dynamic optimization of tight loops with respect to values known at runtime; and runtime instrumentation in support of low-overhead debugging and software monitoring. It can also enable dynamic software development methodologies, such as Read-Eval-Print Loops (REPLs), where software is implemented and composed at runtime. Getting it right is the tricky part. Luckily, partial solutions already exist in the LLVM ecosystem in the form of projects like Cling and LLDB. We are making progress on bringing the functional components of these solutions into LLVM and Clang as composable parts. This talk will summarize these efforts. However, we also need to think about how to expose these features at the language level. How can we exploit the strengths of the C++ language, especially its type safety, and ensure that their guarantees aren't undermined? This talk will serve to open a discussion as to how this feature might look. — Videos Filmed & Edited by Bash Films: http://www.BashFilms.com