import { LogLevel } from './LogLevel';
export declare type MessageDelegate = () => string;
export interface Logger {
    name: string;
    level: LogLevel;
    isEnabledFor(level: LogLevel | number): boolean;
    log(level: LogLevel | number, text: string | MessageDelegate, ...args: any[]): void;
    trace(text: string | MessageDelegate, ...args: any[]): void;
    debug(text: string | MessageDelegate, ...args: any[]): void;
    info(text: string | MessageDelegate, ...args: any[]): void;
    warn(text: string | MessageDelegate, ...args: any[]): void;
    error(text: string | MessageDelegate, ...args: any[]): void;
    fatal(text: string | MessageDelegate, ...args: any[]): void;
}
export declare abstract class BaseLogger implements Logger {
    readonly name: string;
    level: LogLevel | number;
    constructor(name: string, level: LogLevel | number);
    isEnabledFor(level: LogLevel | number): boolean;
    abstract log(level: LogLevel | number, text: string | MessageDelegate, ...args: any[]): void;
    trace(textOrFn: string | MessageDelegate, ...args: any[]): void;
    debug(textOrFn: string | MessageDelegate, ...args: any[]): void;
    info(textOrFn: string | MessageDelegate, ...args: any[]): void;
    warn(textOrFn: string | MessageDelegate, ...args: any[]): void;
    error(textOrFn: string | MessageDelegate, ...args: any[]): void;
    fatal(textOrFn: string | MessageDelegate, ...args: any[]): void;
}