Migrate to Rust 2018

Cargo.toml

@@ -8,6 +8,7 @@ name = "rustfix"
 description = "Automatically apply the suggestions made by rustc"
 repository = "https://github.com/rust-lang-nursery/rustfix"
 documentation = "https://docs.rs/rustfix"
+edition = "2018"
 readme = "Readme.md"
 version = "0.4.4"
 exclude = [

examples/fix-json.rs

@@ -1,5 +1,5 @@
-extern crate failure;
-extern crate rustfix;
+
+use rustfix;
 
 use failure::Error;
 use std::io::{stdin, BufReader, Read};

src/lib.rs

@@ -1,3 +1,5 @@
+#![warn(rust_2018_idioms)]
+
 #[macro_use]
 extern crate log;
 #[macro_use]
@@ -7,15 +9,15 @@ extern crate failure;
 extern crate proptest;
 #[macro_use]
 extern crate serde_derive;
-extern crate serde_json;
+use serde_json;
 
 use std::collections::HashSet;
 use std::ops::Range;
 
 use failure::Error;
 
 pub mod diagnostics;
-use diagnostics::{Diagnostic, DiagnosticSpan};
+use crate::diagnostics::{Diagnostic, DiagnosticSpan};
 mod replace;
 
 #[derive(Debug, Clone, Copy)]
@@ -44,7 +46,7 @@ pub struct LinePosition {
 }
 
 impl std::fmt::Display for LinePosition {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "{}:{}", self.line, self.column)
     }
 }
@@ -56,7 +58,7 @@ pub struct LineRange {
 }
 
 impl std::fmt::Display for LineRange {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "{}-{}", self.start, self.end)
     }
 }
@@ -178,8 +180,8 @@ pub fn collect_suggestions<S: ::std::hash::BuildHasher>(
                 .spans
                 .iter()
                 .filter(|span| {
-                    use Filter::*;
-                    use diagnostics::Applicability::*;
+                    use crate::Filter::*;
+                    use crate::diagnostics::Applicability::*;
 
                     match (filter, &span.suggestion_applicability) {
                         (MachineApplicableOnly, Some(MachineApplicable)) => true,

tests/edge_cases.rs

@@ -1,4 +1,4 @@
-extern crate rustfix;
+use rustfix;
 use std::collections::HashSet;
 use std::fs;
 

tests/parse_and_replace.rs

@@ -1,15 +1,15 @@
 #![cfg(not(windows))] // TODO: should fix these tests on Windows
 
-extern crate duct;
-extern crate env_logger;
+use duct;
+use env_logger;
 #[macro_use]
 extern crate log;
-extern crate rustfix;
-extern crate serde_json;
-extern crate tempdir;
+use rustfix;
+
+
 #[macro_use]
 extern crate failure;
-extern crate difference;
+
 
 use std::collections::HashSet;
 use std::ffi::OsString;