add wasm component (#1073)

- This is the WIT bindings on the Rust side. Will follow up with another
PR for the TypeScript side.
- A couple of APIs were disabled with `TODO` comments due to circular
references. Will re-enable after re-organizing the modules.

.devcontainer/devcontainer.json

@@ -14,9 +14,10 @@
   },
   "customizations": {
     "vscode": {
-      // Keep extensions list in-sync with "$REPO_ROOT/.vscode/extensions.json"
+      // __SLANG_VSCODE_EXTENSIONS_RECOMMENDATIONS__ (keep in sync)
       "extensions": [
         // Language Support
+        "dtsvet.vscode-wasm",
         "igochkov.vscode-ebnf",
         "NomicFoundation.hardhat-solidity",
         "redhat.vscode-yaml",

.vscode/extensions.json

@@ -1,7 +1,8 @@
 {
-  // Keep recommendations list in-sync with "$REPO_ROOT/.devcontainer/devcontainer.json"
+  // __SLANG_VSCODE_EXTENSIONS_RECOMMENDATIONS__ (keep in sync)
   "recommendations": [
     // Language Support
+    "dtsvet.vscode-wasm",
     "igochkov.vscode-ebnf",
     "NomicFoundation.hardhat-solidity",
     "redhat.vscode-yaml",

.vscode/settings.json

@@ -3,7 +3,8 @@
   "editor.rulers": [120],
   "files.associations": {
     "**/documentation/overrides/**/*.html": "jinja-html",
-    "*.ts.jinja2": "jinja-js" // until this is merged: https://github.com/samuelcolvin/jinjahtml-vscode/pull/148
+    "*.ts.jinja2": "jinja-js", // until 'jinja-ts' is released: https://github.com/samuelcolvin/jinjahtml-vscode/pull/148
+    "*.wit.jinja2": "wai"
   },
   "editor.unicodeHighlight.allowedCharacters": {
     "꞉": true // used in CST snapshot tests

Cargo.toml

@@ -118,6 +118,7 @@ napi-derive = { version = "2.16.10" }
 nom = { version = "7.1.3" }
 num-format = { version = "0.4.4" }
 once_cell = { version = "1.19.0" }
+paste = { version = "1.0.15" }
 proc-macro2 = { version = "1.0.86" }
 quote = { version = "1.0.36" }
 rayon = { version = "1.10.0" }
@@ -149,6 +150,7 @@ thiserror = { version = "1.0.63" }
 toml = { version = "0.8.19" }
 trybuild = { version = "1.0.99" }
 url = { version = "2.4.1", features = ["serde"] }
+wit-bindgen = { version = "0.30.0" }
 
 [workspace.lints.rust]
 unused_crate_dependencies = "warn"

crates/codegen/runtime/cargo/Cargo.toml

@@ -13,6 +13,7 @@ default = ["cli"]
 cli = ["dep:ariadne", "dep:clap", "dep:serde_json"]
 __experimental_bindings_api = ["dep:metaslang_bindings"]
 __private_testing_utils = ["dep:ariadne"]
+__private_wit_bindings = ["dep:paste", "dep:wit-bindgen"]
 
 [build-dependencies]
 anyhow = { workspace = true }
@@ -23,12 +24,14 @@ ariadne = { workspace = true, optional = true }
 clap = { workspace = true, optional = true }
 metaslang_bindings = { workspace = true, optional = true }
 metaslang_cst = { workspace = true }
+paste = { workspace = true, optional = true }
 semver = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true, optional = true }
 strum = { workspace = true }
 strum_macros = { workspace = true }
 thiserror = { workspace = true }
+wit-bindgen = { workspace = true, optional = true }
 
 [lints]
 workspace = true