programming, languages
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December 2001 (rev. May 2002) (This article came about in response to some questions on the LL1 mailing list.
What Made Lisp Different
S-expression
In computing, s-expressions , sexprs or sexps (for "symbolic expression") are a notation for nested list ( tree -structured) data, invented for and popularized by the programming language Lisp , which uses them for source code as well as data.
Five-Dollar Words For Programmers, Part Three: Homoiconic - Fabulous Adventures In Coding
Hi Eric, I have two comments:
Languages in which program code is represented as the language's fundamental data type are called 'homoiconic'.
Homoiconic Languages
Homoiconicity
In computer programming, homoiconicity is a property of some programming languages , in which the primary representation of programs is also a data structure in a primitive type of the language itself, from the Greek words homo meaning the same and icon meaning representation .Meta Circular Evaluator
An evaluator that is written in the same language that it evaluates is said to be metacircular if and only if doing so short-circuits the need to specify the precise semantics, because the key language constructs are implemented by themselves, exactly like looking up a word in a dictionary and finding that the definition uses the original word. That's the "metacircular" part.
