Add support for Rust 1.43 (#13)

.github/workflows/clippy.yml

@@ -4,10 +4,15 @@ on: [push]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          components: clippy, rustfmt
+          override: true
       - name: Run clippy
         run: make lint

.github/workflows/rustfmt.yml

@@ -4,10 +4,15 @@ on: [push]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          components: clippy, rustfmt
+          override: true
       - name: Run rustfmt
         run: make format-check

.github/workflows/tests.yml

@@ -3,11 +3,30 @@ name: Tests
 on: [push]
 
 jobs:
-  build:
-
+  build-latest:
+    name: Test on Latest
     runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          override: true
+      - name: Test
+        run: make test
+
+  build-stable:
+    name: Test on 1.43.0
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: 1.43.0
+          profile: minimal
+          override: true
       - name: Test
         run: make test

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 All notable changes to similar are documented here.
 
+## 1.3.0
+
+* Added support for Rust 1.43.0 for better compatibility.
+
 ## 1.2.0
 
 * Make the unicode feature optional for inline diffing.

clippy.toml

@@ -0,0 +1 @@
+msrv = "1.42.0"

src/algorithms/lcs.rs

@@ -22,10 +22,10 @@ where
     D: DiffHook,
     New::Output: PartialEq<Old::Output>,
 {
-    if new_range.is_empty() {
+    if new_range.start >= new_range.end {
         d.delete(old_range.start, old_range.len(), new_range.start)?;
         return Ok(());
-    } else if old_range.is_empty() {
+    } else if old_range.start >= old_range.end {
         d.insert(old_range.start, new_range.start, new_range.len())?;
         return Ok(());
     }

src/algorithms/myers.rs

@@ -118,7 +118,7 @@ where
     New: Index<usize> + ?Sized,
     New::Output: PartialEq<Old::Output>,
 {
-    if old_range.is_empty() || new_range.is_empty() {
+    if old_range.start >= old_range.end || new_range.start >= new_range.end {
         return 0;
     }
     new_range
@@ -141,7 +141,7 @@ where
     New: Index<usize> + ?Sized,
     New::Output: PartialEq<Old::Output>,
 {
-    if old_range.is_empty() || new_range.is_empty() {
+    if old_range.start >= old_range.end || new_range.start >= new_range.end {
         return 0;
     }
     new_range
@@ -312,15 +312,15 @@ where
     old_range.end -= common_suffix_len;
     new_range.end -= common_suffix_len;
 
-    if old_range.is_empty() && new_range.is_empty() {
+    if old_range.start >= old_range.end && new_range.start >= new_range.end {
         // Do nothing
-    } else if new_range.is_empty() {
+    } else if new_range.start >= new_range.end {
         d.delete(
             old_range.start,
             old_range.end - old_range.start,
             new_range.start,
         )?;
-    } else if old_range.is_empty() {
+    } else if old_range.start >= old_range.end {
         d.insert(
             old_range.start,
             new_range.start,