Merge pull request #85 from alexcrichton/fix-build

Fix current build warnings

Author: alexcrichton

.github/workflows/main.yml

@@ -0,0 +1,15 @@
+name: CI
+on: [push, pull_request]
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        rust: [stable, beta, nightly]
+    steps:
+    - uses: actions/checkout@master
+    - name: Install Rust
+      run: rustup update ${{ matrix.rust }} && rustup default ${{ matrix.rust }}
+    - run: cargo test
+    - run: cargo doc

.travis.yml

@@ -3,9 +3,7 @@ getopts
 
 A Rust library for option parsing for CLI utilities.
 
-[![Build Status](https://travis-ci.org/rust-lang-nursery/getopts.svg?branch=master)](https://travis-ci.org/rust-lang-nursery/getopts)
-
-[Documentation](https://doc.rust-lang.org/getopts)
+[Documentation](https://docs.rs/getopts)
 
 ## Usage
 
@@ -15,13 +13,3 @@ Add this to your `Cargo.toml`:
 [dependencies]
 getopts = "0.2"
 ```
-
-and this to your crate root:
-
-```rust
-extern crate getopts;
-```
-
-## Rust Version Support
-
-The minimum supported Rust version is 1.18.

README.md

@@ -503,15 +503,15 @@ impl Options {
 
     /// Derive a custom formatted message from a set of options. The formatted options provided to
     /// a closure as an iterator.
-    pub fn usage_with_format<F: FnMut(&mut Iterator<Item = String>) -> String>(
+    pub fn usage_with_format<F: FnMut(&mut dyn Iterator<Item = String>) -> String>(
         &self,
         mut formatter: F,
     ) -> String {
         formatter(&mut self.usage_items())
     }
 
     /// Derive usage items from a set of options.
-    fn usage_items<'a>(&'a self) -> Box<Iterator<Item = String> + 'a> {
+    fn usage_items<'a>(&'a self) -> Box<dyn Iterator<Item = String> + 'a> {
         let desc_sep = format!("\n{}", repeat(" ").take(24).collect::<String>());
 
         let any_short = self.grps.iter().any(|optref| !optref.short_name.is_empty());