feat: add C++ bindings generation support and update related configur… (#103)

…ations

Signed-off-by: Gordon Smith <GordonJSmith@gmail.com>

Author: GordonSmith

.vscode/settings.json

@@ -20,5 +20,6 @@
     "[jsonc]": {
         "editor.defaultFormatter": "esbenp.prettier-vscode",
         "editor.formatOnSave": true
-    }
+    },
+    "ecl.launchConfiguration": "no selection"
 }

package.json

@@ -161,6 +161,11 @@
                 "title": "Generate C Bindings",
                 "category": "WIT"
             },
+            {
+                "command": "wit-idl.generateBindingsCpp",
+                "title": "Generate C++ Bindings",
+                "category": "WIT"
+            },
             {
                 "command": "wit-idl.generateBindingsCSharp",
                 "title": "Generate C# Bindings",
@@ -255,6 +260,9 @@
                 {
                     "command": "wit-idl.generateBindingsC"
                 },
+                {
+                    "command": "wit-idl.generateBindingsCpp"
+                },
                 {
                     "command": "wit-idl.generateBindingsCSharp"
                 },
@@ -284,6 +292,10 @@
                     "command": "wit-idl.generateBindingsC",
                     "when": "editorLangId == wit || witIdl.isWasmComponent"
                 },
+                {
+                    "command": "wit-idl.generateBindingsCpp",
+                    "when": "editorLangId == wit || witIdl.isWasmComponent"
+                },
                 {
                     "command": "wit-idl.generateBindingsCSharp",
                     "when": "editorLangId == wit || witIdl.isWasmComponent"

src/extension.ts

@@ -666,6 +666,7 @@ export function activate(context: vscode.ExtensionContext) {
     // Create individual language binding commands
     const generateRustBindingsCommand = createGenerateBindingsCommand("rust", "Rust");
     const generateCBindingsCommand = createGenerateBindingsCommand("c", "C");
+    const generateCppBindingsCommand = createGenerateBindingsCommand("cpp", "Cpp");
     const generateCSharpBindingsCommand = createGenerateBindingsCommand("csharp", "CSharp");
     const generateGoBindingsCommand = createGenerateBindingsCommand("go", "Go");
     const generateMoonBitBindingsCommand = createGenerateBindingsCommand("moonbit", "MoonBit");
@@ -716,6 +717,7 @@ export function activate(context: vscode.ExtensionContext) {
         extractCoreWasmCommand,
         generateRustBindingsCommand,
         generateCBindingsCommand,
+        generateCppBindingsCommand,
         generateCSharpBindingsCommand,
         generateGoBindingsCommand,
         generateMoonBitBindingsCommand,

wit-bindgen-wasm/Cargo.lock

@@ -22,6 +22,7 @@ wasmparser = { version = "0.243", features = ["component-model"] }
 wit-parser = "0.243"
 wit-bindgen-core = "0.49"
 wit-bindgen-c = "0.49"
+wit-bindgen-cpp = "0.49"
 wit-bindgen-rust = "0.49"
 wit-bindgen-csharp = "0.49"
 wit-bindgen-moonbit = "0.49"

wit-bindgen-wasm/Cargo.toml

@@ -62,6 +62,7 @@ main();
 - `has_world_definition(content: string): boolean` - Check for world definitions
 - `version(): string` - Get package version
 - `generate_bindings(content: string, language: string, world_name?: string): string` - Generate language bindings (returns JSON with file map)
+  - Supported languages: `rust`, `c`, `cpp` (or `c++`), `csharp` (or `c#`), `go`, `moonbit`
 
 ### Binary Safety Contract
 

wit-bindgen-wasm/README.md

@@ -10,6 +10,7 @@ use wasmparser::{Parser, Payload};
 use wit_bindgen_core::Files;
 use wit_bindgen_rust as rust;
 use wit_bindgen_c as c;
+use wit_bindgen_cpp as cpp;
 use wit_bindgen_csharp as csharp;
 use wit_bindgen_moonbit as moonbit;
 
@@ -226,14 +227,15 @@ impl WitBindgen {
         let files = match language.to_lowercase().as_str() {
             "rust" => self.generate_rust_bindings(content, world_name),
             "c" => self.generate_c_bindings(content, world_name),
+            "cpp" | "c++" => self.generate_cpp_bindings(content, world_name),
             "csharp" | "c#" => self.generate_csharp_bindings(content, world_name),
             "go" => self.generate_go_bindings(content, world_name),
             "moonbit" => self.generate_moonbit_bindings(content, world_name),
             _ => {
                 let mut error_files = HashMap::new();
                 error_files.insert(
                     "error.txt".to_string(), 
-                    format!("// Unsupported language: {}\n// Supported languages: rust, c, csharp, go, moonbit", language)
+                    format!("// Unsupported language: {}\n// Supported languages: rust, c, cpp, csharp, go, moonbit", language)
                 );
                 error_files
             },
@@ -285,6 +287,49 @@ impl WitBindgen {
         Ok(result)
     }
 
+    /// Generate C++ bindings using wit-bindgen-cpp library
+    fn generate_cpp_bindings(&self, content: &str, world_name: Option<String>) -> HashMap<String, String> {
+        match self.generate_cpp_with_wit_bindgen(content, world_name.as_deref()) {
+            Ok(files) => files,
+            Err(e) => {
+                console_error(&format!("wit-bindgen-cpp failed: {}", e));
+                let mut error_files = HashMap::new();
+                error_files.insert(
+                    "error.txt".to_string(),
+                    format!("C++ binding generation failed: {}", e)
+                );
+                error_files
+            }
+        }
+    }
+    
+    /// Generate C++ bindings using wit-bindgen-cpp library
+    fn generate_cpp_with_wit_bindgen(&self, content: &str, world_name: Option<&str>) -> Result<HashMap<String, String>, anyhow::Error> {
+        let inline_path = Path::new("inline.wit");
+        let mut resolve = Resolve::default();
+        let package_id = resolve.push_str(inline_path, content)
+            .with_context(|| "Failed to parse WIT content for C++ binding generation")?;
+        
+        let world_id = if let Some(world_name) = world_name {
+            resolve.select_world(&[package_id], Some(world_name))?
+        } else {
+            resolve.select_world(&[package_id], None)?
+        };
+        
+        let opts = cpp::Opts::default();
+        let mut generator = opts.build(None);
+        let mut files = Files::default();
+        
+        generator.generate(&resolve, world_id, &mut files)?;
+        
+        let mut result = HashMap::new();
+        for (filename, content) in files.iter() {
+            result.insert(filename.to_string(), bytes_to_latin1_string(content));
+        }
+        
+        Ok(result)
+    }
+    
     /// Generate Rust bindings using wit-bindgen-rust library
     fn generate_rust_bindings(&self, content: &str, world_name: Option<String>) -> HashMap<String, String> {
         match self.generate_rust_with_wit_bindgen(content, world_name.as_deref()) {