Lightning Talk: I Wrote a C++ REPL in 20 Lines of Code - And so can you!
summary
A replay-based REPL that compiles a pasted line into a program, runs the executable, diffs output and repeats, actually works for C++ demos. It starts from experimenting with Cling and ends with a pragmatic tool: about 300 lines of orchestration plus per-language 20 lines of JSON (six to compile, one to run, seven to paste, six for console). Demo shows Hello World, variables, and a surprising reference_wrapper swap behavior, and modern compilers make it fast.
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