Reflecting Types in C++17/20
summary
Shows a working technique to reflect C++ types under C++17 by using a front-injection hack that emits meta-info objects as friend functions, then retrieves original types via splice; C++20 structural non-type template parameters and ranges let the code treat a typelist as a range and run std::views::drop/transform and views::reverse to produce new typelists. Example filters by sizeof < 4 to yield two types (n16 and n8). Compiles on recent compilers; GCC lacks non-template friend support and Godbolt emits a warning.
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