eli: A 15-Year Odyssey of Embedded Lisp Interpretation

eli is the culmination of over 15 years of designing and implementing embedded Lisp interpreters in various languages. Born from a need for an embedded Lisp for personal projects, it's become one of the author's most significant endeavors. Primarily implemented in Java, with ongoing efforts to integrate it with Common Lisp, eli demonstrates comparable performance to Python in certain benchmarks. The project boasts a unique type system encompassing bits, callables, comparables, countables, characters, floating-point numbers, integers, iterators, iterables, libraries, lists, maps, types, methods, missing values, numerics, pairs, strings, identifiers, durations, and points in time. It offers a rich feature set, including conditionals, loops, macros, variable binding, type checking, method definition, overloading, lambdas, and namespace/module management.