Séance de cours

Éviter la capture variable

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Dans cours

CS-210: Functional programming

Understanding of the principles and applications of functional programming, the fundamental models of program execution, application of fundamental methods of program composition, meta-programming through the construction of interpreters and advanced progr ...

Description

Cette séance de cours explore la question de la capture de variables dans les fonctions d'ordre supérieur, expliquant comment des substitutions inappropriées peuvent conduire à des erreurs. L'instructeur démontre le concept de renommage des variables pour empêcher la capture des variables, assurer l'application correcte des fonctions et éviter les erreurs d'exécution.

Enseignant·e·s (2)

Martin Odersky

Enseignement et PhD Doctorant·es actuel·les Matthieu Bovel, Yaoyu Zhao, Anna Herlihy, Nguyên Cao Pham, Yichen Xu A dirigé les thèses EPFL de Julie Vachon, Matthias Zenger, Michel Schinz, Philippe Altherr, Vincent Cremet, Burak Emir, Stéphane Micheloud, Iulian Dragos, Philipp Haller, Gilles Dubochet, Tiark Rompf, Ingo Maier, Lukas Rytz, Aleksandar Prokopec, Heather Miller, Vlad Ureche, Nada Amin, Manohar Jonnalagedda, Hubert Plociniczak, Vojin Jovanovic, Sandro Stucki, Eugene Burmako, Dmytro Petrashko, Séb

Viktor Kuncak

Viktor Kunčak joined EPFL in 2007, after receiving a PhD degree from MIT. Since then has been leading the Laboratory for Automated Reasoning and Analysis and supervised at least 12 completed PhD theses. His works on languages, algorithms and systems for verification and automated reasoning. He served as an initiator and one of the coordinators of a European network (COST action) in the area of automated reasoning, verification, and synthesis. In 2012 he received a 5-year single-investigator European Research Council (ERC) grant of 1.5M EUR. His invited talks include those at Lambda Days, Scala Days, NFM, LOPSTR, SYNT, ICALP, CSL, RV, VMCAI, and SMT. A paper on test generation he co-authored received an ACM SIGSOFT distinguished paper award at ICSE. A PLDI paper he co-authored was published in the Communications of the ACM as a Research Highlight article. His Google Scholar profile reports an over-approximate H-index of 38. He was an associate editor of ACM Transactions on Programming Languages and Systems (TOPLAS) and served as a co-chair of conferences on Computer-Aided Verification (CAV), Formal Methods in Computer Aided Design (FMCAD), Workshop on Synthesis (SYNT), and Verification, Model Checking, and Abstract Interpretation (VMCAI). At EPFL he teaches courses on functional and parallel programming, compilers, and verification. He has co-taught the MOOC "Parallel Programming" that was visited by over 100'000 learners and completed by thousands of students from all over the world.

Source officielle

Concepts associés (31)

Filter (higher-order function)

In functional programming, filter is a higher-order function that processes a data structure (usually a list) in some order to produce a new data structure containing exactly those elements of the original data structure for which a given predicate returns the boolean value true. In Haskell, the code example filter even [1..10] evaluates to the list 2, 4, ..., 10 by applying the predicate even to every element of the list of integers 1, 2, ...

Terme (logique)

Un terme est une expression de base du calcul des prédicats, de l'algèbre, notamment de l'algèbre universelle, et du calcul formel, des systèmes de réécriture et de l'unification. C'est l'objet produit par une analyse syntaxique. Sa principale caractéristique est d'être homogène (il n'y a que des opérations de base et pas d'opérations logiques) et de décrire l'agencement des opérations de base. Un terme est parfois appelé une formule du premier ordre.

Name resolution (programming languages)

In programming languages, name resolution is the resolution of the tokens within program expressions to the intended program components. Expressions in computer programs reference variables, data types, functions, classes, objects, libraries, packages and other entities by name. In that context, name resolution refers to the association of those not-necessarily-unique names with the intended program entities. The algorithms that determine what those identifiers refer to in specific contexts are part of the language definition.

Higher-order abstract syntax

In computer science, higher-order abstract syntax (abbreviated HOAS) is a technique for the representation of abstract syntax trees for languages with variable binders. An abstract syntax is abstract because it is represented by mathematical objects that have certain structure by their very nature. For instance, in first-order abstract syntax (FOAS) trees, as commonly used in compilers, the tree structure implies the subexpression relation, meaning that no parentheses are required to disambiguate programs (as they are, in the concrete syntax).

Substitution (logic)

A substitution is a syntactic transformation on formal expressions. To apply a substitution to an expression means to consistently replace its variable, or placeholder, symbols with other expressions. The resulting expression is called a substitution instance, or instance for short, of the original expression. Where ψ and φ represent formulas of propositional logic, ψ is a substitution instance of φ if and only if ψ may be obtained from φ by substituting formulas for symbols in φ, replacing each occurrence of the same symbol by an occurrence of the same formula.

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Concepts associés (31)

Filter (higher-order function)

Terme (logique)

Name resolution (programming languages)

Higher-order abstract syntax

Substitution (logic)

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