import type { OutputFormatter } from '../../../util/text/ansi';
import type { KnownParser } from '../../../r-bridge/parser';
import type { FlowrConfigOptions } from '../../../config';
/**
 * Defines the main interface for output of the repl.
 * This allows us to redirect it (e.g., in the case of a server connection or tests).
 *
 * The formatter allows to dynamically change the use of ansi escape sequences (see {@link OutputFormatter})
 *
 * @see standardReplOutput
 */
export interface ReplOutput {
    formatter: OutputFormatter;
    stdout(msg: string): void;
    stderr(msg: string): void;
}
/**
 * Default repl output that redirects everything to the stdout and stderror channels (linked to `console`).
 * @see ReplOutput
 */
export declare const standardReplOutput: ReplOutput;
/**
 * Information passed to each repl command function
 */
export interface ReplCommandInformation {
    output: ReplOutput;
    parser: KnownParser;
    remainingLine: string;
    allowRSessionAccess: boolean;
    config: FlowrConfigOptions;
}
/**
 * Content of a single command in the repl.
 * The command may execute an external script or simply call *flowR* functions.
 */
export interface ReplCommand {
    /** Aliases of the command (without the leading colon), every alias must be unique (this is checked at runtime) */
    aliases: string[];
    /** A human-readable description of what the command does */
    description: string;
    /** Does the command invoke another script? this is mainly used to automatically generate two separate lists when asking for help */
    script: boolean;
    /** Example of how to use the command, for example `:slicer --help` */
    usageExample: string;
    /**
     * Function to execute when the command is invoked, it must not write to the command line but instead use the output handler.
     * Furthermore, it has to obey the formatter defined in the {@link ReplOutput}.
     */
    fn: (info: ReplCommandInformation) => Promise<void> | void;
}