LobstersFriday · May 15, 2026FREEBidirectional Typechecking That Does Not Stop
The article, published on the Semantic Domain blog and shared on Lobsters, presents a technique for bidirectional typechecking that continues even after encountering type errors. Traditional bidirectional typechecking stops at the first error, but this approach propagates type information to gather more errors and provide richer diagnostics. The post details the algorithm and its implementation, highlighting how it maintains soundness while offering a more robust checking process. This could lead to better error messages in compilers and IDEs, reducing debugging time for developers.
// why it matters
Enables compilers to report multiple type errors at once, speeding up debugging.