feat(slang-sys): initial integration of upstream slang

.clangd

@@ -0,0 +1,23 @@
+If:
+  PathMatch: crates/slang-sys/src/.*\.(cc|cpp|h|hpp)$
+
+CompileFlags:
+  CompilationDatabase: None
+  Add:
+    - -std=c++20
+    - -I.
+    - -I../../../third_party/slang/include
+    - -I../../../third_party/slang/external
+    - -I../../../target/slang-sys/debug/include
+    - -I../../../target/slang-sys/cxx/include
+    - -include
+    - cstdlib
+    - -DSLANG_BOOST_SINGLE_HEADER
+    - -DSLANG_STATIC_DEFINE
+
+---
+If:
+  PathMatch: third_party/slang/.*
+
+CompileFlags:
+  CompilationDatabase: target/slang-sys/debug/build

.github/actions/setup-rust/action.yml

@@ -2,10 +2,6 @@ name: Setup pinned Rust
 description: Install the Rust toolchain pinned by rust-toolchain.toml.
 
 inputs:
-  components:
-    description: Comma-separated Rust components to install.
-    required: false
-    default: ""
   targets:
     description: Comma-separated Rust targets to install.
     required: false
@@ -19,21 +15,28 @@ outputs:
 runs:
   using: composite
   steps:
-    - name: Read pinned toolchain
+    - name: Install pinned Rust
+      shell: bash
+      run: rustup toolchain install --no-self-update
+
+    - name: Install Rust targets
+      if: inputs.targets != ''
+      shell: bash
+      env:
+        RUST_TARGETS: ${{ inputs.targets }}
+      run: |
+        set -euo pipefail
+        IFS=',' read -ra targets <<< "${RUST_TARGETS}"
+        rustup target add "${targets[@]}"
+
+    - name: Resolve active toolchain
       id: toolchain
       shell: bash
       run: |
         set -euo pipefail
-        toolchain="$(sed -n 's/^channel = "\(.*\)"/\1/p' "${GITHUB_WORKSPACE}/rust-toolchain.toml")"
+        toolchain="$(rustup show active-toolchain | awk '{ print $1 }')"
         if [ -z "${toolchain}" ]; then
-          echo "rust-toolchain.toml does not define a toolchain channel." >&2
+          echo "rustup did not report an active toolchain." >&2
           exit 1
         fi
         echo "toolchain=${toolchain}" >> "${GITHUB_OUTPUT}"
-
-    - name: Install Rust
-      uses: dtolnay/rust-toolchain@master
-      with:
-        toolchain: ${{ steps.toolchain.outputs.toolchain }}
-        components: ${{ inputs.components }}
-        targets: ${{ inputs.targets }}

.github/workflows/build-artifacts.yml

@@ -65,6 +65,8 @@ jobs:
       CARGO_PROFILE_RELEASE_INCREMENTAL: "false"
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
 
       - name: Setup Rust
         uses: ./.github/actions/setup-rust
@@ -143,6 +145,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+          submodules: recursive
 
       - name: Download binary artifacts
         uses: actions/download-artifact@v4
@@ -182,6 +185,8 @@ jobs:
         working-directory: editors/vscode
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
 
       - name: Restore playground WASM cache
         id: playground-wasm-cache

.github/workflows/ci.yml

@@ -28,6 +28,8 @@ jobs:
       plan: ${{ steps.plan.outputs.result }}
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - name: Detect changed paths
         id: filter
         if: github.event_name != 'workflow_dispatch'
@@ -67,10 +69,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - name: Install Rust
         uses: ./.github/actions/setup-rust
-        with:
-          components: clippy, rustfmt
       - name: Setup sccache
         uses: ./.github/actions/setup-sccache
         with:
@@ -99,6 +101,8 @@ jobs:
       matrix: ${{ fromJSON(needs.changes.outputs.plan).rust_test_matrix }}
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - name: Install Rust
         uses: ./.github/actions/setup-rust
       - name: Setup sccache
@@ -126,6 +130,8 @@ jobs:
         working-directory: editors/vscode
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
@@ -147,6 +153,8 @@ jobs:
         working-directory: editors/vscode
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - name: Restore playground WASM cache
         id: playground-wasm-cache
         uses: actions/cache/restore@v4
@@ -221,4 +229,3 @@ jobs:
       build-kind: nightly
       cargo-profile: debug
       vsix-profile: debug
-

.github/workflows/deploy-docs.yml

@@ -327,6 +327,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           ref: ${{ github.event.workflow_run.head_sha || github.event.release.tag_name || github.ref }}
+          submodules: recursive
 
       - name: Restore playground WASM cache
         id: playground-wasm-cache

.github/workflows/docs-preview.yml

@@ -75,6 +75,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          submodules: recursive
 
       - name: Restore playground WASM cache
         id: playground-wasm-cache

.github/workflows/publish-vsix.yml

@@ -50,6 +50,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          submodules: recursive
 
       - name: Setup Node
         uses: actions/setup-node@v4

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "third_party/slang"]
+	path = third_party/slang
+	url = https://github.com/MikePopoloski/slang.git

crates/slang-sys/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "slang-sys"
+description = "Thin Rust bindings for the upstream slang SystemVerilog frontend"
+version = "0.1.0"
+edition = "2024"
+license = "MIT"
+build = "build.rs"
+
+[dependencies]
+cxx = { version = "1.0.124", features = ["c++20"] }
+
+[build-dependencies]
+cmake = "0.1.50"
+cxx-build = "1.0.124"