Concept

Kind (type theory)

Publications associées (29)

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Java and Scala's Type Systems are Unsound: The Existential Crisis of Null Pointers

Nada Amin

We present short programs that demonstrate the unsoundness of Java and Scala’s current type systems. In particular, these programs provide parametrically polymorphic functions that can turn any type into any type without (down)casting. Fortunately, paramet ...

2015

On Counter-Example Complete Verification for Higher-Order Functions

Viktor Kuncak, Etienne Kneuss, Nicolas Charles Yves Voirol

We present a verification procedure for pure higher-order functional Scala programs with parametric types. We show that our procedure is sound for proofs, as well as sound and complete for counter-examples. The procedure reduces the analysis of higher-orde ...

2015

Bridging Islands of Specialized Code using Macros and Reified Types

Nicolas Alexander Stucki, Vlad Ureche

Parametric polymorphism in Scala suffers from the usual drawback of erasure on the Java Virtual Machine: primitive values are boxed, leading to indirect access, wasteful use of heap memory and lack of cache locality. For performance-critical parts of the c ...

2013

Miniboxing: Improving the Speed to Code Size Tradeoff in Parametric Polymorphism Translations

Martin Odersky, Vlad Ureche, Cristian Talau

Parametric polymorphism enables code reuse and type safety. Underneath the uniform interface exposed to programmers, however, its low level implementation has to cope with inherently non-uniform data: value types of different sizes and semantics (bytes, in ...

2013

Tangible Interfaces for Learning

Sébastien Cuendet

There have been many claims that Tangible User Interfaces (TUIs) can have a positive impact on learning. Alleged benefits include increasing usability, improving engagement and collaboration of students, and providing a better perception of the task, esp ...

EPFL2013

Miniboxing: An Encoding for Specialization

Cristian Talau

In the presence of parametric polymorphism, erasure-based languages such as Java and Scala handle primitives (boolean values, integers and floating point numbers) in a suboptimal way: in order to provide a uniform representation on the low level, all primi ...

2012

Phantm: PHP Analyzer for Type Mismatch

Viktor Kuncak, Etienne Kneuss, Philippe Paul Henri Suter

We present Phantm, a static analyzer that uses a flow-sensitive analysis to detect type errors in PHP applications. Phantm can infer types for nested arrays, and can leverage runtime information and procedure summaries for more precise results. Phantm foun ...

2010

Phantm: PHP analyzer for type mismatch

Viktor Kuncak, Etienne Kneuss, Philippe Paul Henri Suter

2010

Improving API Documentation for Java-like Languages

Gilles Dubochet, Donna Malayeri

The Javadoc paradigm for displaying API documentation to users is quite popular, with similar variants existing for many mainstream languages. However, two user interface design properties of Javadoc may reduce its utility when displaying documentation for ...

2010

Type Classes as Objects and Implicits

Martin Odersky

Type classes were originally developed in Haskell as a disciplined alternative to ad-hoc polymorphism. Type classes have been shown to provide a type-safe solution to important challenges in software engineering and programming languages such as, for examp ...

ACM2010