Remove explicit S type from component functions

crates/fuzzing/src/generators/component_types.rs

@@ -173,7 +173,7 @@ macro_rules! define_static_api_test {
             let mut store: Store<Box<dyn Any>> = Store::new(&engine, Box::new(()));
             let instance = linker.instantiate(&mut store, &component).unwrap();
             let func = instance
-                .get_typed_func::<($($param,)*), R, _>(&mut store, EXPORT_FUNCTION)
+                .get_typed_func::<($($param,)*), R>(&mut store, EXPORT_FUNCTION)
                 .unwrap();
 
             while input.arbitrary()? {

crates/wasmtime/src/component/func.rs

@@ -185,7 +185,7 @@ impl Func {
     /// # use wasmtime::component::Func;
     /// # use wasmtime::Store;
     /// # fn foo(func: &Func, store: &mut Store<()>) -> anyhow::Result<()> {
-    /// let typed = func.typed::<(), (), _>(&store)?;
+    /// let typed = func.typed::<(), ()>(&store)?;
     /// typed.call(store, ())?;
     /// # Ok(())
     /// # }
@@ -198,7 +198,7 @@ impl Func {
     /// # use wasmtime::component::Func;
     /// # use wasmtime::Store;
     /// # fn foo(func: &Func, mut store: Store<()>) -> anyhow::Result<()> {
-    /// let typed = func.typed::<(&str,), (String,), _>(&store)?;
+    /// let typed = func.typed::<(&str,), (String,)>(&store)?;
     /// let ret = typed.call(&mut store, ("Hello, ",))?.0;
     /// println!("returned string was: {}", ret);
     /// # Ok(())
@@ -211,17 +211,16 @@ impl Func {
     /// # use wasmtime::component::Func;
     /// # use wasmtime::Store;
     /// # fn foo(func: &Func, mut store: Store<()>) -> anyhow::Result<()> {
-    /// let typed = func.typed::<(u32, Option<&str>, &[u8]), (bool,), _>(&store)?;
+    /// let typed = func.typed::<(u32, Option<&str>, &[u8]), (bool,)>(&store)?;
     /// let ok: bool = typed.call(&mut store, (1, Some("hello"), b"bytes!"))?.0;
     /// println!("return value was: {ok}");
     /// # Ok(())
     /// # }
     /// ```
-    pub fn typed<Params, Return, S>(&self, store: S) -> Result<TypedFunc<Params, Return>>
+    pub fn typed<Params, Return>(&self, store: impl AsContext) -> Result<TypedFunc<Params, Return>>
     where
         Params: ComponentNamedList + Lower,
         Return: ComponentNamedList + Lift,
-        S: AsContext,
     {
         self._typed(store.as_context().0)
     }

crates/wasmtime/src/component/instance.rs

@@ -85,20 +85,19 @@ impl Instance {
     /// # Panics
     ///
     /// Panics if `store` does not own this instance.
-    pub fn get_typed_func<Params, Results, S>(
+    pub fn get_typed_func<Params, Results>(
         &self,
-        mut store: S,
+        mut store: impl AsContextMut,
         name: &str,
     ) -> Result<TypedFunc<Params, Results>>
     where
         Params: ComponentNamedList + Lower,
         Results: ComponentNamedList + Lift,
-        S: AsContextMut,
     {
         let f = self
             .get_func(store.as_context_mut(), name)
             .ok_or_else(|| anyhow!("failed to find function export `{}`", name))?;
-        Ok(f.typed::<Params, Results, _>(store)
+        Ok(f.typed::<Params, Results>(store)
             .with_context(|| format!("failed to convert function `{}` to given type", name))?)
     }
 

tests/all/component_model/aot.rs

@@ -62,7 +62,7 @@ fn mildly_more_interesting() -> Result<()> {
     let component = unsafe { Component::deserialize(&engine, &component)? };
     let mut store = Store::new(&engine, ());
     let instance = Linker::new(&engine).instantiate(&mut store, &component)?;
-    let func = instance.get_typed_func::<(), (u32,), _>(&mut store, "a")?;
+    let func = instance.get_typed_func::<(), (u32,)>(&mut store, "a")?;
     assert_eq!(func.call(&mut store, ())?, (103,));
 
     Ok(())

tests/all/component_model/async.rs

@@ -28,13 +28,13 @@ async fn smoke() -> Result<()> {
         .instantiate_async(&mut store, &component)
         .await?;
 
-    let thunk = instance.get_typed_func::<(), (), _>(&mut store, "thunk")?;
+    let thunk = instance.get_typed_func::<(), ()>(&mut store, "thunk")?;
 
     thunk.call_async(&mut store, ()).await?;
     thunk.post_return_async(&mut store).await?;
 
     let err = instance
-        .get_typed_func::<(), (), _>(&mut store, "thunk-trap")?
+        .get_typed_func::<(), ()>(&mut store, "thunk-trap")?
         .call_async(&mut store, ())
         .await
         .unwrap_err();
@@ -79,7 +79,7 @@ async fn smoke_func_wrap() -> Result<()> {
 
     let instance = linker.instantiate_async(&mut store, &component).await?;
 
-    let thunk = instance.get_typed_func::<(), (), _>(&mut store, "thunk")?;
+    let thunk = instance.get_typed_func::<(), ()>(&mut store, "thunk")?;
 
     thunk.call_async(&mut store, ()).await?;
     thunk.post_return_async(&mut store).await?;