Concept
Variable (informatique)
Concepts associés (53)
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.
Union type
In computer science, a union is a value that may have any of several representations or formats within the same position in memory; that consists of a variable that may hold such a data structure. Some programming languages support special data types, called union types, to describe such values and variables. In other words, a union type definition will specify which of a number of permitted primitive types may be stored in its instances, e.g., "float or long integer".
Identificateur
En programmation informatique, un identificateur ou identifiant est un mot choisi par le programmeur et qui, tel une étiquette, désigne une donnée du programme : variable, constante, procédure, type Un identifiant et sa valeur forment une sorte de symbole, comparables à ceux des mathématiques, à la différence qu'en programmation courante la valeur peut changer au cours du temps. On peut distinguer les langages de programmation suivant les règles d'écriture des identifiants, et notamment les jeux de caractères autorisés : ASCII uniquement, jeux de caractères locaux, ou Unicode.