/**
 * Built-in CSV delimiter presets keyed by preset id.
 *
 * @alpha
 */
export declare const CSV_DELIMITER_PRESETS: {
    readonly comma: {
        readonly delimiter: ",";
        readonly previewSymbol: ",";
    };
    readonly semicolon: {
        readonly delimiter: ";";
        readonly previewSymbol: ";";
    };
    readonly pipe: {
        readonly delimiter: "|";
        readonly previewSymbol: "|";
    };
    readonly tab: {
        readonly delimiter: "\t";
        readonly previewSymbol: "⇥";
    };
};
/**
 * Identifier of the default CSV delimiter preset.
 *
 * @alpha
 */
export declare const DEFAULT_CSV_DELIMITER_PRESET_ID = "comma";
/**
 * The default CSV delimiter character (comma).
 *
 * @alpha
 */
export declare const DEFAULT_CSV_DELIMITER: ",";
/**
 * Identifier of a built-in CSV delimiter preset.
 *
 * @alpha
 */
export type CsvDelimiterPresetId = keyof typeof CSV_DELIMITER_PRESETS;
/**
 * Identifier of a CSV delimiter preset, or "custom" when the user provides their own character.
 *
 * @alpha
 */
export type CsvDelimiterPreset = CsvDelimiterPresetId | "custom";
/**
 * Validation error codes returned by {@link getCsvDelimiterValidationError}.
 *
 * - `"singleCharacter"` — the value is empty or longer than one character.
 * - `"unsupportedCharacter"` — the character is not in the allowed set.
 *
 * @alpha
 */
export type CsvDelimiterValidationError = "singleCharacter" | "unsupportedCharacter";
/**
 * Validates a custom delimiter string and returns the first validation error, or `undefined` if valid.
 *
 * @param delimiter - the custom delimiter string to validate
 * @returns validation error code, or `undefined` when the delimiter is acceptable
 * @alpha
 */
export declare function getCsvDelimiterValidationError(delimiter: string): CsvDelimiterValidationError | undefined;
/**
 * Resolves a delimiter character to its corresponding preset identifier.
 *
 * Returns `"custom"` when the delimiter does not match any built-in preset,
 * or the default preset id (`"comma"`) when no delimiter is provided.
 *
 * @param delimiter - delimiter character to look up
 * @returns the matching preset id, `"custom"`, or the default
 * @alpha
 */
export declare function getCsvDelimiterPreset(delimiter?: string): CsvDelimiterPreset;
/**
 * Returns the actual delimiter character for a given preset selection.
 *
 * When the preset is `"custom"`, the provided custom delimiter string is returned as-is.
 *
 * @param selectedPreset - the selected preset identifier
 * @param customDelimiter - the user-provided custom delimiter (used only when preset is `"custom"`)
 * @returns the resolved delimiter character
 * @alpha
 */
export declare function getCsvDelimiterValue(selectedPreset: CsvDelimiterPreset, customDelimiter: string): string;
/**
 * Resolves a delimiter value into its preset identifier and custom delimiter components.
 *
 * Maps the delimiter to a preset when possible, otherwise sets the preset to
 * `"custom"` and populates the custom delimiter field.
 *
 * @param delimiter - the persisted delimiter value (e.g. from workspace settings)
 * @alpha
 */
export declare function getCsvDelimiterState(delimiter?: string): {
    selectedPreset: CsvDelimiterPreset;
    customDelimiter: string;
};
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