Parentesbaserade

Parentesbaserade refers to a style of notation, data representation, or programming language design that relies primarily on parentheses to indicate structure and grouping. The term is Swedish for "parenthesis-based" and is often used to describe systems in which parentheses establish the hierarchical organization of expressions, data, or code.

In programming, parentesbaserade languages typically use S-expressions, in which code and data share a single, uniform syntax: expressions are built from lists enclosed in parentheses, starting with a symbol that denotes the operation or function and followed by its arguments. This approach is central to Lisp-family languages such as Lisp, Scheme, and Clojure, and is known for homoiconicity, meaning code can be manipulated as data within the same representation.

Advantages include a simple, regular grammar and powerful metaprogramming capabilities. Challenges include visual clutter from many parentheses and potential readability issues for large expressions; indentation and tooling are important to mitigate this.

Beyond programming, the concept is also seen in mathematical notations and textual formats where nested parentheses denote grouping or scope, for example in formal grammars or editorial annotations. While Lisp-style syntax is the most prominent example of a parentesbaserad approach, the broader idea can influence how structures are represented and parsed in various disciplines.