Update to Rust 2018

.travis.yml

@@ -18,7 +18,7 @@ matrix:
 
     # Minimum Rust supported channel.
     - os: linux
-      rust: 1.30.0
+      rust: 1.31.0
       env: TARGET=x86_64-unknown-linux-gnu
 
 

Cargo.toml

@@ -8,6 +8,7 @@ name = "hexyl"
 readme = "README.md"
 repository = "https://github.com/sharkdp/hexyl"
 version = "0.4.0"
+edition = "2018"
 
 [dependencies]
 ansi_term = "0.11"

README.md

@@ -63,7 +63,7 @@ you use a terminal that supports ANSI escape sequences (like PowerShell on Windo
 
 ### Via cargo
 
-If you have Rust 1.30 or higher, you can install `hexyl` from source via `cargo`:
+If you have Rust 1.31 or higher, you can install `hexyl` from source via `cargo`:
 ```
 cargo install hexyl
 ```

src/main.rs

@@ -1,8 +1,8 @@
 #[macro_use]
 extern crate clap;
-extern crate ansi_term;
-extern crate atty;
-extern crate ctrlc;
+
+use atty;
+use ctrlc;
 
 mod squeezer;
 
@@ -17,7 +17,7 @@ use ansi_term::Color;
 use ansi_term::Color::Fixed;
 
 use atty::Stream;
-use squeezer::{SqueezeAction, Squeezer};
+use crate::squeezer::{SqueezeAction, Squeezer};
 
 const BUFFER_SIZE: usize = 256;
 
@@ -58,7 +58,7 @@ impl Byte {
     }
 
     fn color(self) -> &'static Color {
-        use ByteCategory::*;
+        use crate::ByteCategory::*;
 
         match self.category() {
             Null => &COLOR_NULL,
@@ -70,7 +70,7 @@ impl Byte {
     }
 
     fn as_char(self) -> char {
-        use ByteCategory::*;
+        use crate::ByteCategory::*;
 
         match self.category() {
             Null => '0',
@@ -167,11 +167,11 @@ struct Printer<'a> {
 
 impl<'a> Printer<'a> {
     fn new(
-        stdout: StdoutLock,
+        stdout: StdoutLock<'_>,
         show_color: bool,
         border_style: BorderStyle,
         use_squeeze: bool,
-    ) -> Printer {
+    ) -> Printer<'_> {
         Printer {
             idx: 1,
             raw_line: vec![],
@@ -394,7 +394,7 @@ impl<'a> Printer<'a> {
     }
 }
 
-fn run() -> Result<(), Box<::std::error::Error>> {
+fn run() -> Result<(), Box<dyn std::error::Error>> {
     let app = App::new(crate_name!())
         .setting(AppSettings::ColorAuto)
         .setting(AppSettings::ColoredHelp)