Upgrade to 2018 edition

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Changelog
 
-## To be released
+## v0.3.1 - To be released
+
+* Upgraded to Rust 2018 edition
 
 ## v0.3.0 - 2018-11-04
 

Cargo.toml

@@ -10,6 +10,7 @@ repository = "https://github.com/fdehau/tui-rs"
 license = "MIT"
 exclude = ["assets/*", ".travis.yml"]
 autoexamples = true
+edition = "2018"
 
 [badges]
 travis-ci = { repository = "fdehau/tui-rs" }

examples/barchart.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -17,7 +13,7 @@ use tui::style::{Color, Modifier, Style};
 use tui::widgets::{BarChart, Block, Borders, Widget};
 use tui::Terminal;
 
-use util::event::{Event, Events};
+use crate::util::event::{Event, Events};
 
 struct App<'a> {
     data: Vec<(&'a str, u64)>,

examples/block.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -16,7 +12,7 @@ use tui::style::{Color, Modifier, Style};
 use tui::widgets::{Block, Borders, Widget};
 use tui::Terminal;
 
-use util::event::{Event, Events};
+use crate::util::event::{Event, Events};
 
 fn main() -> Result<(), failure::Error> {
     // Terminal initialization

examples/canvas.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -19,7 +15,7 @@ use tui::widgets::canvas::{Canvas, Line, Map, MapResolution};
 use tui::widgets::{Block, Borders, Widget};
 use tui::Terminal;
 
-use util::event::{Config, Event, Events};
+use crate::util::event::{Config, Event, Events};
 
 struct App {
     x: f64,

examples/chart.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -16,8 +12,8 @@ use tui::style::{Color, Modifier, Style};
 use tui::widgets::{Axis, Block, Borders, Chart, Dataset, Marker, Widget};
 use tui::Terminal;
 
-use util::event::{Event, Events};
-use util::SinSignal;
+use crate::util::event::{Event, Events};
+use crate::util::SinSignal;
 
 struct App {
     signal1: SinSignal,

examples/crossterm.rs

@@ -1,7 +1,3 @@
-extern crate crossterm;
-extern crate failure;
-extern crate tui;
-
 use tui::backend::CrosstermBackend;
 use tui::style::{Color, Modifier, Style};
 use tui::widgets::{Block, Borders, Paragraph, Text, Widget};

examples/custom_widget.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -18,7 +14,7 @@ use tui::style::Style;
 use tui::widgets::Widget;
 use tui::Terminal;
 
-use util::event::{Event, Events};
+use crate::util::event::{Event, Events};
 
 struct Label<'a> {
     text: &'a str,

examples/demo.rs

@@ -1,9 +1,3 @@
-extern crate failure;
-extern crate log;
-extern crate stderrlog;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -23,8 +17,8 @@ use tui::widgets::{
 };
 use tui::{Frame, Terminal};
 
-use util::event::{Event, Events};
-use util::{RandomSignal, SinSignal, TabsState};
+use crate::util::event::{Event, Events};
+use crate::util::{RandomSignal, SinSignal, TabsState};
 
 struct Server<'a> {
     name: &'a str,

examples/gauge.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -17,7 +13,7 @@ use tui::style::{Color, Modifier, Style};
 use tui::widgets::{Block, Borders, Gauge, Widget};
 use tui::Terminal;
 
-use util::event::{Event, Events};
+use crate::util::event::{Event, Events};
 
 struct App {
     progress1: u16,

examples/layout.rs

@@ -1,9 +1,3 @@
-extern crate failure;
-extern crate log;
-extern crate stderrlog;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -18,7 +12,7 @@ use tui::layout::{Constraint, Direction, Layout};
 use tui::widgets::{Block, Borders, Widget};
 use tui::Terminal;
 
-use util::event::{Event, Events};
+use crate::util::event::{Event, Events};
 
 fn main() -> Result<(), failure::Error> {
     stderrlog::new().verbosity(4).init()?;

examples/list.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -17,7 +13,7 @@ use tui::style::{Color, Modifier, Style};
 use tui::widgets::{Block, Borders, List, SelectableList, Text, Widget};
 use tui::Terminal;
 
-use util::event::{Event, Events};
+use crate::util::event::{Event, Events};
 
 struct App<'a> {
     items: Vec<&'a str>,

examples/paragraph.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -17,7 +13,7 @@ use tui::style::{Color, Modifier, Style};
 use tui::widgets::{Block, Borders, Paragraph, Text, Widget};
 use tui::Terminal;
 
-use util::event::{Event, Events};
+use crate::util::event::{Event, Events};
 
 fn main() -> Result<(), failure::Error> {
     // Terminal initialization

examples/rustbox.rs

@@ -1,6 +1,3 @@
-extern crate rustbox;
-extern crate tui;
-
 use rustbox::Key;
 use std::error::Error;
 

examples/sparkline.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -17,8 +13,8 @@ use tui::style::{Color, Style};
 use tui::widgets::{Block, Borders, Sparkline, Widget};
 use tui::Terminal;
 
-use util::event::{Event, Events};
-use util::RandomSignal;
+use crate::util::event::{Event, Events};
+use crate::util::RandomSignal;
 
 struct App {
     signal: RandomSignal,

examples/table.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -17,7 +13,7 @@ use tui::style::{Color, Modifier, Style};
 use tui::widgets::{Block, Borders, Row, Table, Widget};
 use tui::Terminal;
 
-use util::event::{Event, Events};
+use crate::util::event::{Event, Events};
 
 struct App<'a> {
     items: Vec<Vec<&'a str>>,

examples/tabs.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 #[allow(dead_code)]
 mod util;
 
@@ -17,8 +13,8 @@ use tui::style::{Color, Style};
 use tui::widgets::{Block, Borders, Tabs, Widget};
 use tui::Terminal;
 
-use util::event::{Event, Events};
-use util::TabsState;
+use crate::util::event::{Event, Events};
+use crate::util::TabsState;
 
 struct App<'a> {
     tabs: TabsState<'a>,

examples/user_input.rs

@@ -1,4 +1,3 @@
-extern crate failure;
 /// A simple example demonstrating how to handle user input. This is
 /// a bit out of the scope of the library as it does not provide any
 /// input handling out of the box. However, it may helps some to get
@@ -10,9 +9,6 @@ extern crate failure;
 ///   * Pressing Backspace erases a character
 ///   * Pressing Enter pushes the current input in the history of previous
 ///   messages
-extern crate termion;
-extern crate tui;
-extern crate unicode_width;
 
 #[allow(dead_code)]
 mod util;
@@ -31,7 +27,7 @@ use tui::widgets::{Block, Borders, List, Paragraph, Text, Widget};
 use tui::Terminal;
 use unicode_width::UnicodeWidthStr;
 
-use util::event::{Event, Events};
+use crate::util::event::{Event, Events};
 
 /// App holds the state of the application
 struct App {

examples/util/mod.rs

@@ -1,9 +1,7 @@
-extern crate rand;
-
 pub mod event;
 
-use self::rand::distributions::{Distribution, Uniform};
-use self::rand::rngs::ThreadRng;
+use rand::distributions::{Distribution, Uniform};
+use rand::rngs::ThreadRng;
 
 #[derive(Clone)]
 pub struct RandomSignal {

src/backend/crossterm.rs

@@ -1,11 +1,9 @@
-extern crate crossterm;
-
 use std::io;
 
-use backend::Backend;
-use buffer::Cell;
-use layout::Rect;
-use style::{Color, Modifier};
+use crate::backend::Backend;
+use crate::buffer::Cell;
+use crate::layout::Rect;
+use crate::style::{Color, Modifier};
 
 pub struct CrosstermBackend {
     screen: crossterm::Screen,

src/backend/mod.rs

@@ -1,7 +1,7 @@
 use std::io;
 
-use buffer::Cell;
-use layout::Rect;
+use crate::buffer::Cell;
+use crate::layout::Rect;
 
 #[cfg(feature = "rustbox")]
 mod rustbox;

src/backend/rustbox.rs

@@ -1,11 +1,10 @@
-extern crate rustbox;
-
+use log::debug;
 use std::io;
 
 use super::Backend;
-use buffer::Cell;
-use layout::Rect;
-use style::{Color, Modifier};
+use crate::buffer::Cell;
+use crate::layout::Rect;
+use crate::style::{Color, Modifier};
 
 pub struct RustboxBackend {
     rustbox: rustbox::RustBox,
@@ -13,7 +12,7 @@ pub struct RustboxBackend {
 
 impl RustboxBackend {
     pub fn new() -> Result<RustboxBackend, rustbox::InitError> {
-        let rustbox = try!(rustbox::RustBox::init(Default::default()));
+        let rustbox = r#try!(rustbox::RustBox::init(Default::default()));
         Ok(RustboxBackend { rustbox: rustbox })
     }
 

src/backend/termion.rs

@@ -1,12 +1,11 @@
-extern crate termion;
-
+use log::debug;
 use std::io;
 use std::io::Write;
 
 use super::Backend;
-use buffer::Cell;
-use layout::Rect;
-use style::{Color, Modifier, Style};
+use crate::buffer::Cell;
+use crate::layout::Rect;
+use crate::style::{Color, Modifier, Style};
 
 pub struct TermionBackend<W>
 where
@@ -111,7 +110,7 @@ where
 
     /// Return the size of the terminal
     fn size(&self) -> io::Result<Rect> {
-        let terminal = try!(termion::terminal_size());
+        let terminal = r#try!(termion::terminal_size());
         Ok(Rect::new(0, 0, terminal.0, terminal.1))
     }
 

src/buffer.rs

@@ -5,8 +5,8 @@ use std::usize;
 use unicode_segmentation::UnicodeSegmentation;
 use unicode_width::UnicodeWidthStr;
 
-use layout::Rect;
-use style::{Color, Modifier, Style};
+use crate::layout::Rect;
+use crate::style::{Color, Modifier, Style};
 
 /// A buffer cell
 #[derive(Debug, Clone, PartialEq)]
@@ -74,7 +74,6 @@ impl Default for Cell {
 /// # Examples:
 ///
 /// ```
-/// # extern crate tui;
 /// use tui::buffer::{Buffer, Cell};
 /// use tui::layout::Rect;
 /// use tui::style::{Color, Style, Modifier};

src/layout.rs

@@ -82,7 +82,6 @@ impl Layout {
     ///
     /// # Examples
     /// ```
-    /// # extern crate tui;
     /// # use tui::layout::{Rect, Constraint, Direction, Layout};
     ///
     /// # fn main() {

src/lib.rs

@@ -13,9 +13,6 @@
 //! backend is available.
 //!
 //! ```rust,no_run
-//! extern crate tui;
-//! extern crate termion;
-//!
 //! use std::io;
 //! use tui::Terminal;
 //! use tui::backend::TermionBackend;
@@ -42,7 +39,6 @@
 //! and then create the terminal in a similar way:
 //!
 //! ```rust,ignore
-//! extern crate tui;
 //!
 //! use tui::Terminal;
 //! use tui::backend::RustboxBackend;
@@ -68,8 +64,6 @@
 //! The following example renders a block of the size of the terminal:
 //!
 //! ```rust,no_run
-//! extern crate tui;
-//! extern crate termion;
 //!
 //! use std::io;
 //! use termion::raw::IntoRawMode;
@@ -99,8 +93,6 @@
 //! full customization. And `Layout` is no exception:
 //!
 //! ```rust,no_run
-//! extern crate tui;
-//! extern crate termion;
 //!
 //! use std::io;
 //! use termion::raw::IntoRawMode;
@@ -142,16 +134,6 @@
 //! completely. So if for any reason you might need a blank space somewhere, try to
 //! pass an additional constraint and don't use the corresponding area.
 
-#[macro_use]
-extern crate bitflags;
-extern crate cassowary;
-extern crate either;
-extern crate itertools;
-#[macro_use]
-extern crate log;
-extern crate unicode_segmentation;
-extern crate unicode_width;
-
 pub mod backend;
 pub mod buffer;
 pub mod layout;

src/terminal.rs

@@ -1,9 +1,10 @@
+use log::error;
 use std::io;
 
-use backend::Backend;
-use buffer::Buffer;
-use layout::Rect;
-use widgets::Widget;
+use crate::backend::Backend;
+use crate::buffer::Buffer;
+use crate::layout::Rect;
+use crate::widgets::Widget;
 
 /// Interface to the terminal backed by Termion
 #[derive(Debug)]

src/widgets/barchart.rs

@@ -2,18 +2,17 @@ use std::cmp::{max, min};
 
 use unicode_width::UnicodeWidthStr;
 
-use buffer::Buffer;
-use layout::Rect;
-use style::Style;
-use symbols::bar;
-use widgets::{Block, Widget};
+use crate::buffer::Buffer;
+use crate::layout::Rect;
+use crate::style::Style;
+use crate::symbols::bar;
+use crate::widgets::{Block, Widget};
 
 /// Display multiple bars in a single widgets
 ///
 /// # Examples
 ///
 /// ```
-/// # extern crate tui;
 /// # use tui::widgets::{Block, Borders, BarChart};
 /// # use tui::style::{Style, Color, Modifier};
 /// # fn main() {

src/widgets/block.rs

@@ -1,8 +1,8 @@
-use buffer::Buffer;
-use layout::Rect;
-use style::Style;
-use symbols::line;
-use widgets::{Borders, Widget};
+use crate::buffer::Buffer;
+use crate::layout::Rect;
+use crate::style::Style;
+use crate::symbols::line;
+use crate::widgets::{Borders, Widget};
 
 /// Base widget to be used with all upper level ones. It may be used to display a box border around
 /// the widget and/or add a title.
@@ -10,7 +10,6 @@ use widgets::{Borders, Widget};
 /// # Examples
 ///
 /// ```
-/// # extern crate tui;
 /// # use tui::widgets::{Block, Borders};
 /// # use tui::style::{Style, Color};
 /// # fn main() {

src/widgets/canvas/line.rs

@@ -1,5 +1,5 @@
 use super::Shape;
-use style::Color;
+use crate::style::Color;
 
 /// Shape to draw a line from (x1, y1) to (x2, y2) with the given color
 pub struct Line {

src/widgets/canvas/map.rs

@@ -1,7 +1,7 @@
-use style::Color;
-use widgets::canvas::points::PointsIterator;
-use widgets::canvas::world::{WORLD_HIGH_RESOLUTION, WORLD_LOW_RESOLUTION};
-use widgets::canvas::Shape;
+use crate::style::Color;
+use crate::widgets::canvas::points::PointsIterator;
+use crate::widgets::canvas::world::{WORLD_HIGH_RESOLUTION, WORLD_LOW_RESOLUTION};
+use crate::widgets::canvas::Shape;
 
 #[derive(Clone, Copy)]
 pub enum MapResolution {

src/widgets/canvas/mod.rs

@@ -7,10 +7,10 @@ pub use self::line::Line;
 pub use self::map::{Map, MapResolution};
 pub use self::points::Points;
 
-use buffer::Buffer;
-use layout::Rect;
-use style::{Color, Style};
-use widgets::{Block, Widget};
+use crate::buffer::Buffer;
+use crate::layout::Rect;
+use crate::style::{Color, Style};
+use crate::widgets::{Block, Widget};
 
 pub const DOTS: [[u16; 2]; 4] = [
     [0x0001, 0x0008],
@@ -132,7 +132,6 @@ impl<'a> Context<'a> {
 /// # Examples
 ///
 /// ```
-/// # extern crate tui;
 /// # use tui::widgets::{Block, Borders};
 /// # use tui::widgets::canvas::{Canvas, Shape, Line, Map, MapResolution};
 /// # use tui::style::Color;

src/widgets/canvas/points.rs

@@ -1,7 +1,7 @@
 use std::slice;
 
 use super::Shape;
-use style::Color;
+use crate::style::Color;
 
 /// A shape to draw a group of points with the given color
 pub struct Points<'a> {

src/widgets/chart.rs

@@ -2,12 +2,12 @@ use std::cmp::max;
 
 use unicode_width::UnicodeWidthStr;
 
-use buffer::Buffer;
-use layout::Rect;
-use style::Style;
-use symbols;
-use widgets::canvas::{Canvas, Points};
-use widgets::{Block, Borders, Widget};
+use crate::buffer::Buffer;
+use crate::layout::Rect;
+use crate::style::Style;
+use crate::symbols;
+use crate::widgets::canvas::{Canvas, Points};
+use crate::widgets::{Block, Borders, Widget};
 
 /// An X or Y axis for the chart widget
 pub struct Axis<'a, L>
@@ -166,7 +166,6 @@ impl Default for ChartLayout {
 /// # Examples
 ///
 /// ```
-/// # extern crate tui;
 /// # use tui::widgets::{Block, Borders, Chart, Axis, Dataset, Marker};
 /// # use tui::style::{Style, Color};
 /// # fn main() {

src/widgets/gauge.rs

@@ -1,16 +1,15 @@
 use unicode_width::UnicodeWidthStr;
 
-use buffer::Buffer;
-use layout::Rect;
-use style::{Color, Style};
-use widgets::{Block, Widget};
+use crate::buffer::Buffer;
+use crate::layout::Rect;
+use crate::style::{Color, Style};
+use crate::widgets::{Block, Widget};
 
 /// A widget to display a task progress.
 ///
 /// # Examples:
 ///
 /// ```
-/// # extern crate tui;
 /// # use tui::widgets::{Widget, Gauge, Block, Borders};
 /// # use tui::style::{Style, Color, Modifier};
 /// # fn main() {

src/widgets/list.rs

@@ -3,10 +3,10 @@ use std::iter::Iterator;
 
 use unicode_width::UnicodeWidthStr;
 
-use buffer::Buffer;
-use layout::{Corner, Rect};
-use style::Style;
-use widgets::{Block, Text, Widget};
+use crate::buffer::Buffer;
+use crate::layout::{Corner, Rect};
+use crate::style::Style;
+use crate::widgets::{Block, Text, Widget};
 
 pub struct List<'b, L>
 where
@@ -117,7 +117,6 @@ where
 /// # Examples
 ///
 /// ```
-/// # extern crate tui;
 /// # use tui::widgets::{Block, Borders, SelectableList};
 /// # use tui::style::{Style, Color, Modifier};
 /// # fn main() {

src/widgets/mod.rs

@@ -1,3 +1,4 @@
+use bitflags::bitflags;
 use std::borrow::Cow;
 
 mod barchart;
@@ -22,11 +23,11 @@ pub use self::sparkline::Sparkline;
 pub use self::table::{Row, Table};
 pub use self::tabs::Tabs;
 
-use backend::Backend;
-use buffer::Buffer;
-use layout::Rect;
-use style::{Color, Style};
-use terminal::Frame;
+use crate::backend::Backend;
+use crate::buffer::Buffer;
+use crate::layout::Rect;
+use crate::style::{Color, Style};
+use crate::terminal::Frame;
 
 /// Bitflags that can be composed to set the visible borders essentially on the block widget.
 bitflags! {

src/widgets/paragraph.rs

@@ -2,11 +2,11 @@ use either::Either;
 use unicode_segmentation::UnicodeSegmentation;
 use unicode_width::UnicodeWidthStr;
 
-use buffer::Buffer;
-use layout::{Alignment, Rect};
-use style::Style;
-use widgets::reflow::{LineComposer, LineTruncator, Styled, WordWrapper};
-use widgets::{Block, Text, Widget};
+use crate::buffer::Buffer;
+use crate::layout::{Alignment, Rect};
+use crate::style::Style;
+use crate::widgets::reflow::{LineComposer, LineTruncator, Styled, WordWrapper};
+use crate::widgets::{Block, Text, Widget};
 
 fn get_line_offset(line_width: u16, text_area_width: u16, alignment: Alignment) -> u16 {
     match alignment {
@@ -21,7 +21,6 @@ fn get_line_offset(line_width: u16, text_area_width: u16, alignment: Alignment)
 /// # Examples
 ///
 /// ```
-/// # extern crate tui;
 /// # use tui::widgets::{Block, Borders, Paragraph, Text};
 /// # use tui::style::{Style, Color};
 /// # use tui::layout::{Alignment};

src/widgets/reflow.rs

@@ -1,4 +1,4 @@
-use style::Style;
+use crate::style::Style;
 use unicode_width::UnicodeWidthStr;
 
 const NBSP: &str = "\u{00a0}";

src/widgets/sparkline.rs

@@ -1,17 +1,16 @@
 use std::cmp::min;
 
-use buffer::Buffer;
-use layout::Rect;
-use style::Style;
-use symbols::bar;
-use widgets::{Block, Widget};
+use crate::buffer::Buffer;
+use crate::layout::Rect;
+use crate::style::Style;
+use crate::symbols::bar;
+use crate::widgets::{Block, Widget};
 
 /// Widget to render a sparkline over one or more lines.
 ///
 /// # Examples
 ///
 /// ```
-/// # extern crate tui;
 /// # use tui::widgets::{Block, Borders, Sparkline};
 /// # use tui::style::{Style, Color};
 /// # fn main() {

src/widgets/table.rs

@@ -1,10 +1,10 @@
 use std::fmt::Display;
 use std::iter::Iterator;
 
-use buffer::Buffer;
-use layout::Rect;
-use style::Style;
-use widgets::{Block, Widget};
+use crate::buffer::Buffer;
+use crate::layout::Rect;
+use crate::style::Style;
+use crate::widgets::{Block, Widget};
 
 /// Holds data to be displayed in a Table widget
 pub enum Row<D, I>

src/widgets/tabs.rs

@@ -1,17 +1,16 @@
 use unicode_width::UnicodeWidthStr;
 
-use buffer::Buffer;
-use layout::Rect;
-use style::Style;
-use symbols::line;
-use widgets::{Block, Widget};
+use crate::buffer::Buffer;
+use crate::layout::Rect;
+use crate::style::Style;
+use crate::symbols::line;
+use crate::widgets::{Block, Widget};
 
 /// A widget to display available tabs in a multiple panels context.
 ///
 /// # Examples
 ///
 /// ```
-/// # extern crate tui;
 /// # use tui::widgets::{Block, Borders, Tabs};
 /// # use tui::style::{Style, Color};
 /// # fn main() {

tests/block.rs

@@ -1,6 +1,3 @@
-extern crate tui;
-extern crate unicode_width;
-
 use tui::backend::TestBackend;
 use tui::buffer::Buffer;
 use tui::layout::Rect;

tests/gauge.rs

@@ -1,6 +1,3 @@
-extern crate tui;
-extern crate unicode_width;
-
 use tui::backend::TestBackend;
 use tui::buffer::Buffer;
 use tui::layout::{Constraint, Direction, Layout};

tests/paragraph.rs

@@ -1,7 +1,3 @@
-extern crate failure;
-extern crate termion;
-extern crate tui;
-
 use tui::backend::TestBackend;
 use tui::buffer::Buffer;
 use tui::layout::Alignment;

tests/size.rs

@@ -1,5 +1,3 @@
-extern crate tui;
-
 use tui::backend::{Backend, TestBackend};
 use tui::Terminal;