Li-yao XIA
A fan of functional programming (Haskell, Rocq, Agda), formal verification, and testing.
I am currently an INRIA research engineer on Creusot, a program verifier for Rust.
Projects, publications
Story of Your Lazy Function’s Life: A Bidirectional Demand Semantics for Mechanized Cost Analysis of Lazy Programs. Li-yao Xia, Laura Israel, Maite Kramarz, Nicholas Coltharp, Koen Claessen, Stephanie Weirich, Yao Li. ICFP 2024. (PDF, slides)
Executable Semantics with Interaction Trees. Thesis. (draft, Google slides)
C4: Verified Transactional Objects. Mohsen Lesani, Li-yao Xia, Anders Kaseorg, Christian J. Bell, Adam Chlipala, Benjamin C. Pierce, Steve Zdancewic. OOPSLA 2022. (PDF, Rocq artifact on Zenodo)
Reasoning about the garden of forking paths. Yao Li, Li-yao Xia, Stephanie Weirich. ICFP 2021. (arxiv preprint)
InteractionTrees: program semantics with free monads in Coq.
- Interaction Trees: Representing Effectful and Recursive Programs in Coq. Li-yao Xia, Yannick Zakowski, Paul He, Chung-Kil Hur, Gregory Malecha, Benjamin C. Pierce, Steve Zdancewic. POPL 2020. (arxiv, talk, conference page with links to slides)
DeepSpec Web Server (description)
- From C to Interaction Trees: Specifying, Verifying, and Testing a Networked Server.
Nicolas Koh, Yao Li, Yishuai Li, Li-yao Xia,
Lennart Beringer, Wolf Honoré, William Mansky, Benjamin C. Pierce, Steve Zdancewic.
CPP 2019.
(arxiv,
slides.pptx,slides.pdf, talk transcript)
- From C to Interaction Trees: Specifying, Verifying, and Testing a Networked Server.
Nicolas Koh, Yao Li, Yishuai Li, Li-yao Xia,
Lennart Beringer, Wolf Honoré, William Mansky, Benjamin C. Pierce, Steve Zdancewic.
CPP 2019.
(arxiv,
Bidirectional programming with monadic profunctors.
- Composing Bidirectional Programs Monadically,
Li-yao Xia, Dominic Orchard, Meng Wang. ESOP 2019.
(arxiv,
slides.pdf)
- Composing Bidirectional Programs Monadically,
Li-yao Xia, Dominic Orchard, Meng Wang. ESOP 2019.
(arxiv,
QuickChick: random testing in Rocq.
Personal projects
I have a blog.
PLClub Talks (slides)
Seeing the World through Lenses (Google Slides)
From Operational to Denotational Semantics: Full Abstraction and Game Semantics (Google Slides)
A Garden Path towards Equality (Google Slides)
Algebraic Data Types (Google Slides)
Defunctionalization (Google Slides, PDF).
Programming, Libraries
first-class-families: Haskell type families can be made first-class, see my blog post.
generic-random: a library of generic random generators.
generic-data: utilities for GHC Generics.
metamorph: monomorphize polymorphic values, based on the paper Testing Polymorphic Properties.
Maintainerships
- Rocq (coqdoc maintainer)
- QuickChick
- haskell/aeson
- haskell/text