Parser / Compiler - (Abstract) Syntax Tree (AST)


Parser / Compiler - (Abstract) Syntax Tree (AST)


An Abstract Syntax Tree (AST) is a syntax tree. It represents the structure of the grammar at a higher level than a concrete syntax tree (parse tree) and thus easier to manipulate.

At the opposite of a concrete syntax tree, an abstract syntax tree has only the syntactic structure of the code.

For instance, an AST would not known if a literal was enclosed by a double or single quote.

An Abstract Syntax Tree (AST) is created by a parser.


The site astexporer 1) permits to create AST from compiler library for different languages.

  • Choose your language
  • Choose your compiler if many
  • Copy your code
  • And explore the AST in the right pane.

Ast Explorer Php


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