Transpiler from J to Fortran

J is an offshoot of APL, co-authored by Iverson, that uses the ASCII character set. Since modern Fortran is also an array programming language, and since it has been argued that token-efficient languages such as J are a good fit for LLMs, I wrote a transpiler from J to Fortran using OpenAI Sol primarily

Besides a batch translator there is a REPL that translates and runs Fortran code on the fly. It works on some small J programs, but it cannot handle the more dynamic programs at GitHub - jonghough/jlearn: Machine Learning Library, written in J · GitHub or the programs for astronomy here. Claude Opus says that a larger subset of J code could be transpiled to Python/Numpy calling Fortran as needed.