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ICFP 2018
Sun 23 - Sat 29 September 2018 St. Louis, Missouri, United States
Fri 28 Sep 2018 13:30 - 14:00 at Illinois Central - Session 6 Chair(s): Brent Yorgey

Occasionally, developers need to ensure that the compiler treats their code in a specific way that is only visible by \emph{inspecting} intermediate or final compilation artifacts. This is particularly common with carefully crafted compositional libraries, where certain usage patterns are expected to trigger an intricate sequence of compiler optimizations – stream fusion is a well-known example.

The developer of such a library has to manually inspect build artifacts and check for the expected properties. Because this is too tedious to do often, it will likely go unnoticed if the property is broken by a change to the library code, its dependencies or the compiler. The lack of automation has led to released versions of such libraries breaking their documented promises.

This indicates that there is an unrecognized need for a new testing paradigm, \emph{inspection testing}, where the programmer declaratively describes non-functional properties of an compilation artifact and the compiler checks these properties. We define inspection testing abstractly, implement it in the context of the Haskell Compiler GHC and show that it increases the quality of such libraries.

Fri 28 Sep
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13:30 - 15:00: Session 6Haskell at Illinois Central
Chair(s): Brent YorgeyHendrix College
13:30 - 14:00
A Promise Checked Is a Promise Kept: Inspection Testing
Joachim BreitnerDFINITY Foundation
14:00 - 14:30
Branching Processes for QuickCheck Generators
Agustín MistaUniversidad Nacional de Rosario, Argentina, Alejandro RussoChalmers University of Technology, Sweden, John HughesChalmers University of Technology, Sweden
14:30 - 15:00
Coherent Explicit Dictionary Application for Haskell
Thomas WinantKU Leuven, Belgium, Dominique DevrieseVrije Universiteit Brussel, Belgium
DOI File Attached