import type { RangeData } from '../common/range';
import type { PromptString } from './prompt-string';
/**
 * Truncates text to the given number of tokens, keeping the start of the text.
 */
export declare function truncateText(text: string, maxTokens: number): string;
export declare function truncatePromptString(text: PromptString, maxTokens: number): PromptString;
/**
 * If text was truncated, return the truncated text and range to which it was truncated.
 * If the text is shorter than maxBytes, then return the text as-is with an undefined
 * range.
 * Note: the truncated text and range may be empty (e.g., for single-line files,
 * which should be ignored anyway).
 */
export declare function truncateTextNearestLine(text: string, maxBytes: number): {
    truncated: string;
    range?: RangeData;
};
/**
 * Truncates text to the given number of tokens, keeping the end of the text.
 */
export declare function truncateTextStart(text: string, maxTokens: number): string;
export declare function truncatePromptStringStart(text: PromptString, maxTokens: number): PromptString;
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