Extent to which a programming language discourages type errors
Type systems
General concepts
Type safety
Strong vs. weak typing
Major categories
Static vs. dynamic
Manifest vs. inferred
Nominal vs. structural
Duck typing
Minor categories
Abstract
Dependent
Flow-sensitive
Gradual
Intersection
Latent
Refinement
Substructural
Unique
Session
v
t
e
In computer science, type safety and type soundness are the extent to which a programming language discourages or prevents type errors. Type safety is sometimes alternatively considered to be a property of facilities of a computer language; that is, some facilities are type-safe and their usage will not result in type errors, while other facilities in the same language may be type-unsafe and a program using them may encounter type errors. The behaviors classified as type errors by a given programming language are usually those that result from attempts to perform operations on values that are not of the appropriate data type, e.g., adding a string to an integer when there's no definition on how to handle this case. This classification is partly based on opinion.
Type enforcement can be static, catching potential errors at compile time, or dynamic, associating type information with values at run-time and consulting them as needed to detect imminent errors, or a combination of both.[1] Dynamic type enforcement often allows programs to run that would be invalid under static enforcement.
In the context of static (compile-time) type systems, type safety usually involves (among other things) a guarantee that the eventual value of any expression will be a legitimate member of that expression's static type. The precise requirement is more subtle than this — see, for example, subtyping and polymorphism for complications.
^"What to know before debating type systems | Ovid [blogs.perl.org]". blogs.perl.org. Retrieved 2023-06-27.
computer science, typesafety and type soundness are the extent to which a programming language discourages or prevents type errors. Typesafety is sometimes...
information about commands. Type safety, the extent to which a programming language discourages or prevents type errors. Type system, defines a programming...
"strong typing" and "weak typing" in favor of specific expressions such as "typesafety". Generally, a strongly typed language has stricter typing rules...
A safety bicycle (or simply a safety) is a type of bicycle that became very popular beginning in the late 1880s as an alternative to the penny-farthing...
indicating its current type for enhanced typesafety. An algebraic data type (ADT) is a possibly recursive sum type of product types. A value of an ADT consists...
Safety is the state of being "safe", the condition of being protected from harm or other danger. Safety can also refer to the control of recognized hazards...
type system to allow "a type or method to operate on objects of various types while providing compile-time typesafety". The aspect compile-time type...
inheritance). With duck typing, an object is of a given type if it has all methods and properties required by that type. Duck typing may be viewed as a usage-based...
characters, with no built-in typesafety. XML has the concept of schema, that permits strong typing, user-defined types, predefined tags, and formal structure...
checker can be used to prove the typesafety of code that meets the criteria of some appropriate type system. Typed assembly languages usually include...
in many languages, can result in a loss of typesafety when (for example) the same primitive integer type is used in two semantically distinct ways. Haskell...
objects uniformly. But typesafety is lost because clients can perform child-related operations on Leaf objects. Design for typesafety: Child-related operations...
Funeral in 1994. The dress was held together by several oversized gold safety pins. The dress is one of Versace's best-known creations, along with Jennifer...
the bolt carrier and receiver. The RPD has a manually operated lever-typesafety mechanism that secures the weapon against accidental firing by blocking...
Type inference, sometimes called type reconstruction,: 320 refers to the automatic detection of the type of an expression in a formal language. These...
programming and type theory, an algebraic data type (ADT) is a kind of composite type, i.e., a type formed by combining other types. Two common classes...
the type system, trading typesafety for finer control over the program's execution (see casting). In static typing, all expressions have their types determined...
using an explicit declaration to type-annotate a variable to a machine-size word (fixnum) and lower the typesafety level to zero for a particular code...
dependent type is a type whose definition depends on a value. It is an overlapping feature of type theory and type systems. In intuitionistic type theory...
Global Information