Transpiler from J to Fortran

A developer has created a transpiler from the J programming language to Fortran using OpenAI Sol, enabling batch translation and a REPL that translates and runs Fortran code on the fly. The tool works on small J programs but cannot handle more dynamic programs such as those in the jlearn machine learning library or astronomy programs. Claude Opus suggests a larger subset of J code could be transpiled to Python/Numpy calling Fortran as needed.

J https://www.jsoftware.com/ / 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 https://martinalderson.com/posts/which-programming-languages-are-most-token-efficient/ 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 https://github.com/jonghough/jlearn or the programs for astronomy here https://pages.astro.umd.edu/~jpha/J page.html . Claude Opus says that a larger subset of J code could be transpiled to Python/Numpy calling Fortran as needed.