In computer science, an abstract semantic graph (ASG) is a data structure used in representing or deriving the semantics of an expression in a formal language (for example, a programming language). Computer science is the study of information and computation. ... A binary tree, a simple type of branching linked data structure. ... In theoretical computer science formal semantics is the field concerned with the rigorous mathematical study of the meaning of programming languages and models of computation. ... In mathematics, logic and computer science, a formal language is a set of finite-length words (i. ... Computer code (HTML with JavaScript) in a tool that uses colors to help the developer see the function of each piece of code. ...
An abstract semantic graph is a higher level abstraction than an abstract syntax tree (or AST), which is used to express the syntactic structure of an expression or program. Lloyd smells. ... Syntax, originating from the Greek words συν (syn, meaning co- or together) and τάξις (táxis, meaning sequence, order, arrangement), can in linguistics be described as the study of the rules, or patterned relations that govern the way the words in a sentence come together. ... A computer program (often simply called a program) is an example of computer software that prescribes the actions (computations) that are to be carried out by a computer. ...
An abstract semantic graph is typically constructed from an abstract syntax tree by a process of enrichment and abstraction. The enrichment can for example be the addition of back-pointers, edges from an identifier node (where a variable is being used) to a node representing the declaration of that variable. The abstraction can entail the removal of details which are relevant only in parsing, not for semantics. This article is about the computer data type. ... This article just presents the basic definitions. ... Identifiers (IDs) are lexical tokens that name entities. ... In computer science and mathematics, a variable is a symbol denoting a quantity or symbolic representation. ... A declaration is a form of statement, which expresses (or declares) some idea; declarations attempt to argue that something is true. ... In computer science, parsing is the process of analyzing an input sequence (read from a file or a keyboard, for example) in order to determine its grammatical structure with respect to a given formal grammar. ...
In computer science, an abstractsyntax tree (AST) is a finite, labeled, directed tree, where the internal nodes are labeled by operators, and the leaf nodes represent the operands of the node operators.
In computing, it is used in a parser as an intermediate between a parse tree and a data structure, the latter which is often used as a compiler or interpreter's internal representation of a computer program while it is being optimized and from which code generation is performed.
The range of all possible such structures is described by the abstractsyntax.
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