Type-Directed Diffing of Structured Data

Victor Miraldo

Date: Wed, February 28, 2018
Time: 12:00
Room: Yellow Brickroad (Bouwcampus)

The Unix diff utility that compares lines of text is used pervasively by version control systems. Yet certain changes to a program may be difficult to describe accurately in terms of modifications to individual lines of code. As a result, observing changes at such a fixed granularity may lead to unnecessary conflicts between different edits. This talk discusses a generic representation for describing transformations between algebraic data types. These representations can be used to give a more accurate account of modifications made to algebraic data structures – and the abstract syntax trees of computer programs in particular – as opposed to only considering modifications between their textual representations.

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