Circle is a new programming language that extends C++ 17 to support data-driven imperative metaprogramming. Circle combines the immediacy and flexibility of a scripting language with the type system, performance and universality of C++. Three new features make this a more effective programming tool than Standard C++:

1. An integrated interpreter supports the execution of normal C++ statements at compile time.
2. Same-language reflection programmatically allows for the generation of new code without involving an elaborate DOM or API for modelling the AST.
3. Introspection keywords inform the program about the content of types, and expose data members and enumerators as iterable entities.

Circle accepts the C++ language as a starting point, and rotates that language from the runtime to the compile-time axis, allowing you to finally metaprogram C++ using C++.

https://www.circle-lang.org/

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