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- import type { Document } from './doc/Document.js';
- import type { Alias } from './nodes/Alias.js';
- import { Node } from './nodes/Node.js';
- import type { Pair } from './nodes/Pair.js';
- import type { Scalar } from './nodes/Scalar.js';
- import type { YAMLMap } from './nodes/YAMLMap.js';
- import type { YAMLSeq } from './nodes/YAMLSeq.js';
- export type visitorFn<T> = (key: number | 'key' | 'value' | null, node: T, path: readonly (Document | Node | Pair)[]) => void | symbol | number | Node | Pair;
- export type visitor = visitorFn<unknown> | {
- Alias?: visitorFn<Alias>;
- Collection?: visitorFn<YAMLMap | YAMLSeq>;
- Map?: visitorFn<YAMLMap>;
- Node?: visitorFn<Alias | Scalar | YAMLMap | YAMLSeq>;
- Pair?: visitorFn<Pair>;
- Scalar?: visitorFn<Scalar>;
- Seq?: visitorFn<YAMLSeq>;
- Value?: visitorFn<Scalar | YAMLMap | YAMLSeq>;
- };
- export type asyncVisitorFn<T> = (key: number | 'key' | 'value' | null, node: T, path: readonly (Document | Node | Pair)[]) => void | symbol | number | Node | Pair | Promise<void | symbol | number | Node | Pair>;
- export type asyncVisitor = asyncVisitorFn<unknown> | {
- Alias?: asyncVisitorFn<Alias>;
- Collection?: asyncVisitorFn<YAMLMap | YAMLSeq>;
- Map?: asyncVisitorFn<YAMLMap>;
- Node?: asyncVisitorFn<Alias | Scalar | YAMLMap | YAMLSeq>;
- Pair?: asyncVisitorFn<Pair>;
- Scalar?: asyncVisitorFn<Scalar>;
- Seq?: asyncVisitorFn<YAMLSeq>;
- Value?: asyncVisitorFn<Scalar | YAMLMap | YAMLSeq>;
- };
- /**
- * Apply a visitor to an AST node or document.
- *
- * Walks through the tree (depth-first) starting from `node`, calling a
- * `visitor` function with three arguments:
- * - `key`: For sequence values and map `Pair`, the node's index in the
- * collection. Within a `Pair`, `'key'` or `'value'`, correspondingly.
- * `null` for the root node.
- * - `node`: The current node.
- * - `path`: The ancestry of the current node.
- *
- * The return value of the visitor may be used to control the traversal:
- * - `undefined` (default): Do nothing and continue
- * - `visit.SKIP`: Do not visit the children of this node, continue with next
- * sibling
- * - `visit.BREAK`: Terminate traversal completely
- * - `visit.REMOVE`: Remove the current node, then continue with the next one
- * - `Node`: Replace the current node, then continue by visiting it
- * - `number`: While iterating the items of a sequence or map, set the index
- * of the next step. This is useful especially if the index of the current
- * node has changed.
- *
- * If `visitor` is a single function, it will be called with all values
- * encountered in the tree, including e.g. `null` values. Alternatively,
- * separate visitor functions may be defined for each `Map`, `Pair`, `Seq`,
- * `Alias` and `Scalar` node. To define the same visitor function for more than
- * one node type, use the `Collection` (map and seq), `Value` (map, seq & scalar)
- * and `Node` (alias, map, seq & scalar) targets. Of all these, only the most
- * specific defined one will be used for each node.
- */
- export declare function visit(node: Node | Document | null, visitor: visitor): void;
- export declare namespace visit {
- var BREAK: symbol;
- var SKIP: symbol;
- var REMOVE: symbol;
- }
- /**
- * Apply an async visitor to an AST node or document.
- *
- * Walks through the tree (depth-first) starting from `node`, calling a
- * `visitor` function with three arguments:
- * - `key`: For sequence values and map `Pair`, the node's index in the
- * collection. Within a `Pair`, `'key'` or `'value'`, correspondingly.
- * `null` for the root node.
- * - `node`: The current node.
- * - `path`: The ancestry of the current node.
- *
- * The return value of the visitor may be used to control the traversal:
- * - `Promise`: Must resolve to one of the following values
- * - `undefined` (default): Do nothing and continue
- * - `visit.SKIP`: Do not visit the children of this node, continue with next
- * sibling
- * - `visit.BREAK`: Terminate traversal completely
- * - `visit.REMOVE`: Remove the current node, then continue with the next one
- * - `Node`: Replace the current node, then continue by visiting it
- * - `number`: While iterating the items of a sequence or map, set the index
- * of the next step. This is useful especially if the index of the current
- * node has changed.
- *
- * If `visitor` is a single function, it will be called with all values
- * encountered in the tree, including e.g. `null` values. Alternatively,
- * separate visitor functions may be defined for each `Map`, `Pair`, `Seq`,
- * `Alias` and `Scalar` node. To define the same visitor function for more than
- * one node type, use the `Collection` (map and seq), `Value` (map, seq & scalar)
- * and `Node` (alias, map, seq & scalar) targets. Of all these, only the most
- * specific defined one will be used for each node.
- */
- export declare function visitAsync(node: Node | Document | null, visitor: asyncVisitor): Promise<void>;
- export declare namespace visitAsync {
- var BREAK: symbol;
- var SKIP: symbol;
- var REMOVE: symbol;
- }
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