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

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RDF Stream Processing: Let's React

Jean Paul Calbimonte Perez

Stream processing has recently gained a prominent role in Computer Science research. From networks or databases to information theory or programming languages, a lot of work has been dedicated to conceive ways of representing, transmitting, processing and ...

2014

Effect of Magnesium and Zinc Ions on the Hydration Kinetics of C3S

Karen Scrivener, Marco Cantoni, Qiao Wang, Amélie Bazzoni

Impure tricalcium silicate (C3S) in portland cement may contain various foreign ions. These ions can stabilize different polymorphs of C3S at room temperature and may affect its reactivity. In this paper, the effects of magnesium and zinc on the polymorph ...

Wiley-Blackwell2014

Code-Pointer Integrity

George Candea, Mathias Josef Payer, Volodymyr Kuznetsov

Systems code is often written in low-level languages like C/C++, which offer many benefits but also delegate memory management to programmers. This invites memory safety bugs that attackers can exploit to divert control flow and compromise the system. Depl ...

2014

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

Using Reified Types for Specialization

Nicolas Alexander Stucki

Generic code increases programmer productivity as it increases code reuse. For example, the LinkedList abstraction can be used in many contexts, from storing a list of numbers to storing representations of files on the disk. Unfortunately this comes at the ...

2013

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

Functional synthesis for linear arithmetic and sets

Viktor Kuncak, Mikaël Mayer, Philippe Paul Henri Suter, Ruzica Piskac

Synthesis of program fragments from specifications can make programs easier to write and easier to reason about. To integrate synthesis into programming languages, synthesis algorithms should behave in a predictable way—they should succeed for a well-defin ...

Springer Berlin Heidelberg2013

Termination Analysis in a Higher-Order Functional Context

Nicolas Charles Yves Voirol

We start by describing how higher-order function support can be added to a (first order) functional verification framework. We cover both the higher-order construct management and framework extensions necessary for constraint specification. Next, we outlin ...

2013

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

Implementing a Type Debugger for Scala

Martin Odersky, Hubert Plociniczak

Statically-typed languages offer type systems that are less and less comprehensible for programmers as the language grows in complexity. In this paper, we present a type debugger, a tool that enables analysis of type-related problems as well as exploration ...

2012