abstract syntax tree - определение. Что такое abstract syntax tree
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Что (кто) такое abstract syntax tree - определение

TREE REPRESENTATION OF THE ABSTRACT SYNTACTIC STRUCTURE OF SOURCE CODE
Abstract syntax trees; Abstract Syntax Tree; Abstract syntax tree representation
  • An abstract syntax tree for the following code for the [[Euclidean algorithm]]:<syntaxhighlight lang="python">
while b ≠ 0:
    if a > b:
        a := a - b
    else:
        b := b - a
return a
</syntaxhighlight>

abstract syntax tree         
<compiler> (AST) A data structure representing something which has been parsed, often used as a compiler or interpreter's internal representation of a program while it is being optimised and from which code generation is performed. The range of all possible such structures is described by the abstract syntax. (1994-11-08)
Abstract syntax tree         
In computer science, an abstract syntax tree (AST), or just syntax tree, is a tree representation of the abstract syntactic structure of text (often source code) written in a formal language. Each node of the tree denotes a construct occurring in the text.
Abstract syntax         
SYNTACTIC STRUCTURE INDEPENDENT OF ANY PARTICULAR REPRESENTATION OR ENCODING
Abstract Syntax; First-order abstract syntax
In computer science, the abstract syntax of data is its structure described as a data type (possibly, but not necessarily, an abstract data type), independent of any particular representation or encoding. This is particularly used in the representation of text in computer languages, which are generally stored in a tree structure as an abstract syntax tree.

Википедия

Abstract syntax tree

In computer science, an abstract syntax tree (AST), or just syntax tree, is a tree representation of the abstract syntactic structure of text (often source code) written in a formal language. Each node of the tree denotes a construct occurring in the text.

The syntax is "abstract" in the sense that it does not represent every detail appearing in the real syntax, but rather just the structural or content-related details. For instance, grouping parentheses are implicit in the tree structure, so these do not have to be represented as separate nodes. Likewise, a syntactic construct like an if-condition-then statement may be denoted by means of a single node with three branches.

This distinguishes abstract syntax trees from concrete syntax trees, traditionally designated parse trees. Parse trees are typically built by a parser during the source code translation and compiling process. Once built, additional information is added to the AST by means of subsequent processing, e.g., contextual analysis.

Abstract syntax trees are also used in program analysis and program transformation systems.