Update to CRoaring v4.2.1 for #21

.github/workflows/test-linux.yml

@@ -0,0 +1,40 @@
+name: Swift on Ubuntu
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  tests-linux:
+    strategy:
+      matrix:
+        swift: ["6"]
+        ubuntu: ["ubuntu-24.04"]
+
+    name: SwiftPM build in Swift ${{ matrix.swift }} on ${{ matrix.ubuntu }}
+    runs-on: ${{ matrix.ubuntu }}
+    steps:
+      - name: Log versions
+        run: echo "Target Swift ${{ matrix.swift }} on ${{ matrix.ubuntu }}"
+      - name: Setup Swift version
+        uses: swift-actions/setup-swift@v2
+        with:
+          swift-version: ${{ matrix.swift }}
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: linuxmain
+        run: |
+          echo "::notice title=Build Environment::Running on ${{ matrix.os }}"
+          uname -a
+          swift --version
+          swift build
+          swift test
+      - name: Build
+        run: swift build
+      - name: Test
+        run: swift test

.github/workflows/test-macOS.yml

@@ -0,0 +1,28 @@
+name: Swift on macOS (latest)
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  tests-macOS:
+    strategy:
+      fail-fast: false
+      matrix:
+        swift: ["5", "6"]
+        destination: [macOS]
+
+    name: SwiftPM macOS
+    runs-on: macOS-latest
+    steps:
+      - name: Checkout      
+        uses: actions/checkout@v4
+      - name: Build
+        run: swift build
+      - name: Test
+        run: swift test

README.md

@@ -79,18 +79,24 @@ import SwiftRoaring
 let bitmap = RoaringBitmap()
 
 //Example: Add Range
-bitmap.addRange(min: 0, max: 500)
+bitmap.addRange(min: 0, max: 50)
 
 //Example: copy
 let cpy = bitmap.copy()
 
 //Example: Operators
-let and = bitmap && cpy
+let and = bitmap.union(cpy)
+
+let delta = and.subtracting(bitmap)
+print("copy, union, and subtract -> empty: \(delta.isEmpty)")
 
 //Example: Iterate
+var out = ""
 for i in bitmap {
-    print(i)
+    out += "\(i) "
 }
+print("0 ..< 50: \(out)")
+
 
 //See documentation for more functionalities!