/**
 * Signature help for Handlebars for Marketing Cloud Next (MCN) helpers.
 *
 * Active only when a document targets Marketing Cloud Next
 * (`targetPlatform: 'next'`). Unlike AMPscript/SSJS calls, Handlebars helpers
 * take whitespace-separated arguments inside a `{{ ... }}` mustache, a `{{# ...}}`
 * block, or a `( ... )` subexpression — so the active call context is resolved
 * by a small scope-aware tokenizer rather than `findFunctionContext`.
 */
import type { SignatureHelp } from '../types.js';
/** Resolved Handlebars helper call context at the cursor. */
interface HandlebarsCallContext {
    /** The helper name leading the innermost active expression scope. */
    helperName: string;
    /** Zero-based index of the argument currently being typed. */
    argIndex: number;
}
/**
 * Resolve the innermost Handlebars helper call context from the document text
 * up to the cursor. Returns null when the cursor is not inside an open `{{ }}`
 * expression, or when the leading helper name has not been typed yet.
 * @param textUpToCursor - Document text from start up to the cursor position.
 * @returns The active helper call context, or null.
 */
export declare function findHandlebarsCallContext(textUpToCursor: string): HandlebarsCallContext | null;
/**
 * Return signature help for the Handlebars helper at the given call context.
 * @param context - The resolved helper call context.
 * @param context.helperName - Name of the helper being invoked.
 * @param context.argIndex - Zero-based index of the active argument.
 * @returns SignatureHelp object, or null when the helper is unknown or takes no
 *   parameters.
 */
export declare function getHandlebarsSignatureHelp(context: {
    helperName: string;
    argIndex: number;
}): SignatureHelp | null;
export {};
//# sourceMappingURL=mcnHandlebars.d.ts.map