first commit

.github/dependabot.yml

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+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  # Maintain dependencies for Cargo
+  - package-ecosystem: "cargo"
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: weekly

.github/workflows/ci.yml

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+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+      - master
+      - develop
+
+env:
+  CARGO_TERM_COLOR: always
+
+# ensure that the workflow is only triggered once per PR, subsequent pushes to the PR will cancel
+# and restart the workflow. See https://docs.github.com/en/actions/using-jobs/using-concurrency
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  fmt:
+    name: fmt
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install Rust stable
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+      - name: check formatting
+        run: cargo fmt -- --check
+      - name: Cache Cargo dependencies
+        uses: Swatinem/rust-cache@v2
+  clippy:
+    name: clippy
+    runs-on: ubuntu-latest
+    permissions:
+      checks: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install Rust stable
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+      - name: Run clippy action
+        uses: clechasseur/rs-clippy-check@v3
+      - name: Cache Cargo dependencies
+        uses: Swatinem/rust-cache@v2
+  doc:
+    # run docs generation on nightly rather than stable. This enables features like
+    # https://doc.rust-lang.org/beta/unstable-book/language-features/doc-cfg.html which allows an
+    # API be documented as only available in some specific platforms.
+    name: doc
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Rust nightly
+        uses: dtolnay/rust-toolchain@nightly
+      - name: Run cargo doc
+        run: cargo doc --no-deps --all-features
+        env:
+          RUSTDOCFLAGS: --cfg docsrs
+  test:
+    runs-on: ${{ matrix.os }}
+    name: test ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest]
+    steps:
+      # if your project needs OpenSSL, uncomment this to fix Windows builds.
+      # it's commented out by default as the install command takes 5-10m.
+      # - run: echo "VCPKG_ROOT=$env:VCPKG_INSTALLATION_ROOT" | Out-File -FilePath $env:GITHUB_ENV -Append
+      #   if: runner.os == 'Windows'
+      # - run: vcpkg install openssl:x64-windows-static-md
+      #   if: runner.os == 'Windows'
+      - uses: actions/checkout@v4
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+      # enable this ci template to run regardless of whether the lockfile is checked in or not
+      - name: cargo generate-lockfile
+        if: hashFiles('Cargo.lock') == ''
+        run: cargo generate-lockfile
+      - name: cargo test --locked
+        run: cargo test --locked --all-features --all-targets
+      - name: Cache Cargo dependencies
+        uses: Swatinem/rust-cache@v2

.gitignore

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+/target
+.vscode/

.vscode/launch.json

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+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+{
+        {
+            "type": "lldb",
+            "request": "launch",
+            "name": "Debug executable 'compiletest-differ'",
+            "cargo": {
+                "args": [
+                    "build",
+                    "--bin=compiletest-differ",
+                    "--package=compiletest-differ"
+                ],
+                "filter": {
+                    "name": "compiletest-differ",
+                    "kind": "bin"
+                }
+            },
+            "args": [],
+            "cwd": "${workspaceFolder}"
+        },
+        {
+            "type": "lldb",
+            "request": "launch",
+            "name": "Debug unit tests in executable 'compiletest-differ'",
+            "cargo": {
+                "args": [
+                    "test",
+                    "--no-run",
+                    "--bin=compiletest-differ",
+                    "--package=compiletest-differ"
+                ],
+                "filter": {
+                    "name": "compiletest-differ",
+                    "kind": "bin"
+                }
+            },
+            "args": [],
+            "cwd": "${workspaceFolder}"
+        }
+    ]
+}