Abstract
Modern Haskell supports zero-cost coercions, a mechanism where types that share the same run-time representation may be freely converted between. To make sure such conversions are safe and desirable, this feature relies on a mechanism of roles to prohibit invalid coercions. In this work, we show how to incorporate roles into dependent types systems and prove, using the Coq proof assistant, that the resulting system is sound. We have designed this work as a foundation for the addition of dependent types to the Glasgow Haskell Compiler, but we also expect that it will be of use to designers of other dependently-typed languages who might want to adopt Haskell’s safe coercions feature.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
