Merge with upstream (#125)

Cargo.toml

@@ -94,6 +94,7 @@ ahash = { version = "0.8.11", default-features = false }
 termcolor = "1.2.0"
 indoc = "2.0.5"
 gimli = "0.30.0"
+id-arena = "2"
 
 wasm-compose = { version = "0.215.0", path = "crates/wasm-compose" }
 wasm-encoder = { version = "0.215.0", path = "crates/wasm-encoder" }

crates/wasmparser/src/features.rs

@@ -162,6 +162,27 @@ define_wasm_features! {
     }
 }
 
+impl WasmFeatures {
+    /// Returns the feature set associated with the 1.0 version of the
+    /// WebAssembly specification or the "MVP" feature set.
+    pub fn wasm1() -> WasmFeatures {
+        WasmFeatures::FLOATS
+    }
+
+    /// Returns the feature set associated with the 2.0 version of the
+    /// WebAssembly specification.
+    pub fn wasm2() -> WasmFeatures {
+        WasmFeatures::wasm1()
+            | WasmFeatures::BULK_MEMORY
+            | WasmFeatures::REFERENCE_TYPES
+            | WasmFeatures::SIGN_EXTENSION
+            | WasmFeatures::MUTABLE_GLOBAL
+            | WasmFeatures::SATURATING_FLOAT_TO_INT
+            | WasmFeatures::MULTI_VALUE
+            | WasmFeatures::SIMD
+    }
+}
+
 impl From<WasmFeaturesInflated> for WasmFeatures {
     #[inline]
     fn from(inflated: WasmFeaturesInflated) -> Self {

crates/wit-encoder/Cargo.toml

@@ -11,7 +11,7 @@ version.workspace = true
 workspace = true
 
 [features]
-default = ["serde"]
+default = ["serde", "from-parser"]
 
 # Enables JSON serialization/deserialization of the wit-encoder structures.
 
@@ -23,11 +23,14 @@ default = ["serde"]
 # *Note*: The exact structure of the JSON is likely not going to be very stable over time,
 # so slight tweaks and variants should be expected as this crate evolves.
 serde = ["dep:serde", "semver/serde"]
+from-parser = ["wit-parser", "id-arena"]
 
 [dependencies]
 semver = { workspace = true }
 pretty_assertions = { workspace = true }
 serde = { workspace = true, optional = true, features = ["derive"] }
+wit-parser = { workspace = true, optional = true }
+id-arena = { workspace = true, optional = true }
 
 [dev-dependencies]
 indoc = { workspace = true }