AstElement AST Common Object

The AstElement object is the core of ALL elements. Every single element.

info

Every single AST element in the document inherits the AstElement and can access its data

Attributes

• astType (type string): the type of the element. The value depends in what element you are on.
• context (type Context and depends on the language): the context of the AST
• start (type Position): the starting position of the element in the AST
• end (type Position): the starting position of the element in the AST

tip

At any time when you write a rule, use the astType to distinguish between the types of nodes you are working on.

info

The context attribute depends on your language. It inherits the Context object. If you are using Python, see PythonNodeContext

Usage

When you have an AST object, you can do the following:

const astObject = ...

// get the starting line of the element
const startLine = astObject.start.line;

// get the ending column of the object
const endCol = astObject.end.col;

// check if the type of the object is string
if (astObject.astType === "string") {
  ...
}

if (astObject.context.currentFunction) {
  // this AST element is in a function
}