1,066 papers · page 28 of 54
Languages with support for metaprogramming, like MetaOCaml, offer a principled approach to code generation by guaranteeing that well-typed metaprograms produce well-typed programs. However, many problem domains where metaprogramming can fruitfully be applied require generating co…
I explore programming with the dependently typed functional language, AGDA. I present the progress which AGDA has made, demonstrate its usage in a small development, reflect critically on the state of the art, and speculate about the way ahead. I do not seek to persuade you to ad…
Most complex software projects are compiled using a build tool (e.g. make), which runs commands in an order satisfying user-defined dependencies. Unfortunately, most build tools require all dependencies to be specified before the build starts. This restriction makes many dependen…
The higher-order logic found in proof assistants such as Coq and various HOL systems provides a convenient setting for the development and verification of pure functional programs. However, to efficiently run these programs, they must be converted (or "extracted") to functional p…
Higher-order model checking - the model checking of trees generated by higher-order recursion schemes (HORS) - is a natural generalisation of finite-state and pushdown model checking. Recent work has shown that it can serve as a basis for software model checking for functional la…
This paper presents a new functional programming model for graph structures called structured graphs. Structured graphs extend conventional algebraic datatypes with explicit definition and manipulation of cycles and/or sharing, and offer a practical and convenient way to program …
Today, all high-performance computer architectures are parallel and heterogeneous; a combination of multiple CPUs, GPUs and specialized processors. This creates a complex programming problem for application developers. Domain-specific languages (DSLs) are a promising solution to …
We present techniques that enable higher-order functional computations to "explain" their work by answering questions about how parts of their output were calculated. As explanations, we consider the traditional notion of program slices, which we show can be inadequate, and propo…
Embedded domain-specific languages (EDSLs) are an approach for quickly building new languages while maintaining the advantages of a rich metalanguage. We argue in this experience report that the "EDSL approach" can surprisingly ease the task of building a high-assurance compiler.…
In this paper, we use types for ensuring that programs involving streams are well-behaved. We extend pure type systems with a type constructor for streams, a modal operator next and a fixed point operator for expressing corecursion. This extension is called Pure Type Systems with…
We rely on a computational infrastructure that is a densely interwined mass of software and hardware: programming languages, network protocols, operating systems, and processors. It has accumulated great complexity, from a combination of engineering design decisions, contingent h…
We describe the Funlogic system which extends a functional language with existentially quantified declarations. An existential declaration introduces a variable and a set of constraints that its value should meet. Existential variables are bound to conforming values by a decision…
We present a framework of dynamic programming combinators that provides a high-level environment to describe the recursions typical of dynamic programming over sequence data in a style very similar to algebraic dynamic programming (ADP). Using a combination of type-level programm…
This paper describes the first successful attempt, of which we are aware, to define an automatic, type-based static analysis of resource bounds for lazy functional programs. Our analysis uses the automatic amortisation approach developed by Hofmann and Jost, which was previously …
When termination of a program is observable by an adversary, confidential information may be leaked by terminating accordingly. While this termination covert channel has limited bandwidth for sequential programs, it is a more dangerous source of information leakage in concurrent …
We present VeriStar, a verified theorem prover for a decidable subset of separation logic. Together with VeriSmall [3], a proved-sound Smallfoot-style program analysis for C minor, VeriStar demonstrates that fully machine-checked static analyses equipped with efficient theorem pr…
The Glasgow Haskell Compiler is an optimizing compiler that expresses and manipulates first-class equality proofs in its intermediate language. We describe a simple, elegant technique that exploits these equality proofs to support deferred type errors. The technique requires us t…
Continuing a line of work by Abramsky (1994), by Bellin and Scott (1994), and by Caires and Pfenning (2010), among others, this paper presents CP, a calculus in which propositions of classical linear logic correspond to session types. Continuing a line of work by Honda (1993), by…
Language-based security relies on the assumption that all potential attacks follow the rules of the language in question. When programs are compiled into a different language, this is true only if the translation process preserves observational equivalence.
The Mendler style catamorphism (which corresponds to weak induction) always terminates even for negative inductive datatypes. The Mendler style histomorphism (which corresponds to strong induction) is known to terminate for positive inductive datatypes. To our knowledge, the lite…