Published on: 2025-09-19 00:38:14
Ever since Stephen Dolan’s 2016 thesis Algebraic Subtyping showed how to combine type inference and subtyping, I’ve been developing increasingly sophisticated programming languages based on those ideas, first IntercalScript in 2019, then CubiML in 2020, PolySubML in 2025, and with my next language already in the planning stages. I’ve long thought that subtyping is the next great evolution in programming language design and that it is a critical feature for new programming languages. However, ex
Keywords: int null string subtyping type
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