import { ASTContent, ASTNode } from '@stridespark/model-core';
export interface TransformFunction<T> {
    (content: null | (string | T)[]): T;
}
export interface TransformMap<T> {
    [tag: string]: TransformFunction<T>;
}
export declare function n(tag: string, content: ASTContent[]): ASTNode;
export declare function isASTNode(content: ASTContent): content is ASTNode;
/**
 * Reduce an ASTNode to a 'T' by bottoms-up applying the TransformFunction
 * specified by tag in the TransformMap (or the default)
 */
export declare function transform<T>(node: ASTNode, transformMap: TransformMap<T>): T;
/**
 * Replaces any nodes (and their children) that match toRemove with toReplace. Will modify node.
 **/
export declare function replaceNode(node: ASTContent, toRemove: (node: ASTContent) => boolean, toReplace: ASTNode): ASTContent;
/**
 * Return array of nodes (and their children) that match predicate.
 */
export declare function filter(node: ASTContent, predicate: (node: ASTNode) => boolean): ASTNode[];
export declare function retagNodes(node: ASTNode, replace: string[], replaceWith: string): ASTNode;
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