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Dependent Types in Haskell

Strange Loop Conference via YouTube

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This talk examines how dependent type theory has influenced GHC and Haskell, using an extended example to explain type-indexed data, singletons, and type classes. It also considers current capabilities and limitations of dependent programming in Haskell.

Syllabus

Intro
Dependent Haskell
Regular expression capture groups
How does this work? 1. Compile-time parsing
2. Type functions run by type checker
Types Constrain Data with GADTS
Indexed Types constrain data
Dependent types
GHC's take: Singletons
Working with type indices
Type classes to the rescue
Four Capabilities of Dependent Type Systems

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Strange Loop Conference

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