antlr-ng
Version:
Next generation ANTLR Tool
17 lines (16 loc) • 660 B
TypeScript
/**
* How to execute code for node t when a visitor visits node t?
* Execute pre() before visiting children and execute post() after visiting children.
*/
export interface TreeVisitorAction<T> {
/**
* Execute an action before visiting children of t. Return t or a rewritten t. It is up to the visitor to
* decide what to do with the return value. Children of returned value will be visited if using TreeVisitor.visit().
*/
pre(t: T): T;
/**
* Execute an action after visiting children of t. Return t or a rewritten t. It is up to the visitor to decide
* what to do with the return value.
*/
post(t: T): T;
}