proc outputFilename(filename: string; filepath: string; langConfig: TConfig): string {...}{.
    raises: [UnsupportedCharacterError], tags: [].}

proc importFilename(filename: string; filepath: string; callerFilename: string;
                    callerFilepath: string; langConfig: TConfig): string {...}{.
    raises: [UnsupportedCharacterError], tags: [].}

proc tFilename(filename: string; filepath: string): string {...}{.
    raises: [UnsupportedCharacterError], tags: [].}