import type { SyntaxNode } from '../types.js';
/**
 * Extract function/method signature
 */
export declare function extractSignature(node: SyntaxNode, content: string): string;
/**
 * Truncate an over-long signature to keep stored chunks compact.
 */
export declare function clampSignatureLength(signature: string): string;
/**
 * Collapse a node's raw text to a single line for signature-building,
 * mirroring `extractSignature`'s `.replace(/\s+/g, ' ').trim()` convention.
 * A grammar node's text can itself span multiple physical lines even when
 * it's a small, single "clause" — e.g. a C# `base_list` wrapping a
 * conditionally-compiled member in a preprocessor block (`: ILogger\n#if
 * X\n, IAsyncDisposable\n#endif`), found via dogfooding a real class
 * (Serilog's `Logger`) rather than a hypothetical case. Returns `''` for
 * `undefined`/absent nodes so callers can compose pieces without a null
 * check at every call site.
 */
export declare function collapseWhitespace(text: string | undefined): string;
/**
 * Extract parameter list from function node
 *
 * Note: The `_content` parameter is unused in this function, but is kept for API consistency
 * with other extract functions (e.g., extractSignature).
 */
export declare function extractParameters(node: SyntaxNode, _content: string): string[];
/**
 * Extract return type from function node (TypeScript)
 *
 * Note: The `_content` parameter is unused in this function, but is kept for API consistency
 * with other extract functions (e.g., extractSignature).
 */
export declare function extractReturnType(node: SyntaxNode, _content: string): string | undefined;
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