/// Link-time configurations. #[derive(Clone, Debug, Default)] pub struct LinkOptions { experimental_interface: bool, experimental_interface_function: bool, experimental_interface_resource: bool, experimental_interface_resource_method: bool, experimental_world: bool, experimental_world_function_import: bool, experimental_world_interface_import: bool, experimental_world_resource: bool, experimental_world_resource_method: bool, } impl LinkOptions { /// Enable members marked as `@unstable(feature = experimental-interface)` pub fn experimental_interface(&mut self, enabled: bool) -> &mut Self { self.experimental_interface = enabled; self } /// Enable members marked as `@unstable(feature = experimental-interface-function)` pub fn experimental_interface_function(&mut self, enabled: bool) -> &mut Self { self.experimental_interface_function = enabled; self } /// Enable members marked as `@unstable(feature = experimental-interface-resource)` pub fn experimental_interface_resource(&mut self, enabled: bool) -> &mut Self { self.experimental_interface_resource = enabled; self } /// Enable members marked as `@unstable(feature = experimental-interface-resource-method)` pub fn experimental_interface_resource_method( &mut self, enabled: bool, ) -> &mut Self { self.experimental_interface_resource_method = enabled; self } /// Enable members marked as `@unstable(feature = experimental-world)` pub fn experimental_world(&mut self, enabled: bool) -> &mut Self { self.experimental_world = enabled; self } /// Enable members marked as `@unstable(feature = experimental-world-function-import)` pub fn experimental_world_function_import(&mut self, enabled: bool) -> &mut Self { self.experimental_world_function_import = enabled; self } /// Enable members marked as `@unstable(feature = experimental-world-interface-import)` pub fn experimental_world_interface_import(&mut self, enabled: bool) -> &mut Self { self.experimental_world_interface_import = enabled; self } /// Enable members marked as `@unstable(feature = experimental-world-resource)` pub fn experimental_world_resource(&mut self, enabled: bool) -> &mut Self { self.experimental_world_resource = enabled; self } /// Enable members marked as `@unstable(feature = experimental-world-resource-method)` pub fn experimental_world_resource_method(&mut self, enabled: bool) -> &mut Self { self.experimental_world_resource_method = enabled; self } } impl core::convert::From for foo::foo::the_interface::LinkOptions { fn from(src: LinkOptions) -> Self { (&src).into() } } impl core::convert::From<&LinkOptions> for foo::foo::the_interface::LinkOptions { fn from(src: &LinkOptions) -> Self { let mut dest = Self::default(); dest.experimental_interface(src.experimental_interface); dest.experimental_interface_function(src.experimental_interface_function); dest.experimental_interface_resource(src.experimental_interface_resource); dest.experimental_interface_resource_method( src.experimental_interface_resource_method, ); dest } } pub enum Baz {} pub trait HostBazWithStore: wasmtime::component::HasData + Send { fn drop( accessor: &wasmtime::component::Accessor, rep: wasmtime::component::Resource, ) -> impl ::core::future::Future> + Send where Self: Sized; fn foo( accessor: &wasmtime::component::Accessor, self_: wasmtime::component::Resource, ) -> impl ::core::future::Future + Send; } pub trait HostBaz: Send {} impl<_T: HostBaz + ?Sized + Send> HostBaz for &mut _T {} /// Auto-generated bindings for a pre-instantiated version of a /// component which implements the world `the-world`. /// /// This structure is created through [`TheWorldPre::new`] which /// takes a [`InstancePre`](wasmtime::component::InstancePre) that /// has been created through a [`Linker`](wasmtime::component::Linker). /// /// For more information see [`TheWorld`] as well. pub struct TheWorldPre { instance_pre: wasmtime::component::InstancePre, indices: TheWorldIndices, } impl Clone for TheWorldPre { fn clone(&self) -> Self { Self { instance_pre: self.instance_pre.clone(), indices: self.indices.clone(), } } } impl<_T: 'static> TheWorldPre<_T> { /// Creates a new copy of `TheWorldPre` bindings which can then /// be used to instantiate into a particular store. /// /// This method may fail if the component behind `instance_pre` /// does not have the required exports. pub fn new( instance_pre: wasmtime::component::InstancePre<_T>, ) -> wasmtime::Result { let indices = TheWorldIndices::new(&instance_pre)?; Ok(Self { instance_pre, indices }) } pub fn engine(&self) -> &wasmtime::Engine { self.instance_pre.engine() } pub fn instance_pre(&self) -> &wasmtime::component::InstancePre<_T> { &self.instance_pre } /// Instantiates a new instance of [`TheWorld`] within the /// `store` provided. /// /// This function will use `self` as the pre-instantiated /// instance to perform instantiation. Afterwards the preloaded /// indices in `self` are used to lookup all exports on the /// resulting instance. pub fn instantiate( &self, mut store: impl wasmtime::AsContextMut, ) -> wasmtime::Result { let mut store = store.as_context_mut(); let instance = self.instance_pre.instantiate(&mut store)?; self.indices.load(&mut store, &instance) } } impl<_T: Send + 'static> TheWorldPre<_T> { /// Same as [`Self::instantiate`], except with `async`. pub async fn instantiate_async( &self, mut store: impl wasmtime::AsContextMut, ) -> wasmtime::Result { let mut store = store.as_context_mut(); let instance = self.instance_pre.instantiate_async(&mut store).await?; self.indices.load(&mut store, &instance) } } /// Auto-generated bindings for index of the exports of /// `the-world`. /// /// This is an implementation detail of [`TheWorldPre`] and can /// be constructed if needed as well. /// /// For more information see [`TheWorld`] as well. #[derive(Clone)] pub struct TheWorldIndices {} /// Auto-generated bindings for an instance a component which /// implements the world `the-world`. /// /// This structure can be created through a number of means /// depending on your requirements and what you have on hand: /// /// * The most convenient way is to use /// [`TheWorld::instantiate`] which only needs a /// [`Store`], [`Component`], and [`Linker`]. /// /// * Alternatively you can create a [`TheWorldPre`] ahead of /// time with a [`Component`] to front-load string lookups /// of exports once instead of per-instantiation. This /// method then uses [`TheWorldPre::instantiate`] to /// create a [`TheWorld`]. /// /// * If you've instantiated the instance yourself already /// then you can use [`TheWorld::new`]. /// /// These methods are all equivalent to one another and move /// around the tradeoff of what work is performed when. /// /// [`Store`]: wasmtime::Store /// [`Component`]: wasmtime::component::Component /// [`Linker`]: wasmtime::component::Linker pub struct TheWorld {} pub trait TheWorldImportsWithStore: wasmtime::component::HasData + HostBazWithStore + Send { fn foo( accessor: &wasmtime::component::Accessor, ) -> impl ::core::future::Future + Send; } pub trait TheWorldImports: HostBaz + Send {} impl<_T: TheWorldImports + ?Sized + Send> TheWorldImports for &mut _T {} const _: () = { impl TheWorldIndices { /// Creates a new copy of `TheWorldIndices` bindings which can then /// be used to instantiate into a particular store. /// /// This method may fail if the component does not have the /// required exports. pub fn new<_T>( _instance_pre: &wasmtime::component::InstancePre<_T>, ) -> wasmtime::Result { let _component = _instance_pre.component(); let _instance_type = _instance_pre.instance_type(); Ok(TheWorldIndices {}) } /// Uses the indices stored in `self` to load an instance /// of [`TheWorld`] from the instance provided. /// /// Note that at this time this method will additionally /// perform type-checks of all exports. pub fn load( &self, mut store: impl wasmtime::AsContextMut, instance: &wasmtime::component::Instance, ) -> wasmtime::Result { let _ = &mut store; let _instance = instance; Ok(TheWorld {}) } } impl TheWorld { /// Convenience wrapper around [`TheWorldPre::new`] and /// [`TheWorldPre::instantiate`]. pub fn instantiate<_T>( store: impl wasmtime::AsContextMut, component: &wasmtime::component::Component, linker: &wasmtime::component::Linker<_T>, ) -> wasmtime::Result { let pre = linker.instantiate_pre(component)?; TheWorldPre::new(pre)?.instantiate(store) } /// Convenience wrapper around [`TheWorldIndices::new`] and /// [`TheWorldIndices::load`]. pub fn new( mut store: impl wasmtime::AsContextMut, instance: &wasmtime::component::Instance, ) -> wasmtime::Result { let indices = TheWorldIndices::new(&instance.instance_pre(&store))?; indices.load(&mut store, instance) } /// Convenience wrapper around [`TheWorldPre::new`] and /// [`TheWorldPre::instantiate_async`]. pub async fn instantiate_async<_T>( store: impl wasmtime::AsContextMut, component: &wasmtime::component::Component, linker: &wasmtime::component::Linker<_T>, ) -> wasmtime::Result where _T: Send, { let pre = linker.instantiate_pre(component)?; TheWorldPre::new(pre)?.instantiate_async(store).await } pub fn add_to_linker_imports( linker: &mut wasmtime::component::Linker, options: &LinkOptions, host_getter: fn(&mut T) -> D::Data<'_>, ) -> wasmtime::Result<()> where D: TheWorldImportsWithStore, for<'a> D::Data<'a>: TheWorldImports, T: 'static + Send, { let mut linker = linker.root(); if options.experimental_world { if options.experimental_world_resource { linker .resource_concurrent( "baz", wasmtime::component::ResourceType::host::(), move |caller: &wasmtime::component::Accessor, rep| { wasmtime::component::__internal::Box::pin(async move { let accessor = &caller.with_getter(host_getter); wasmtime::ToWasmtimeResult::to_wasmtime_result( HostBazWithStore::drop( accessor, wasmtime::component::Resource::new_own(rep), ) .await, ) }) }, )?; } if options.experimental_world_function_import { linker .func_wrap_concurrent( "foo", move |caller: &wasmtime::component::Accessor, (): ()| { wasmtime::component::__internal::Box::pin(async move { let host = &caller.with_getter(host_getter); let r = ::foo(host).await; Ok(r) }) }, )?; } if options.experimental_world_resource_method { linker .func_wrap_concurrent( "[method]baz.foo", move | caller: &wasmtime::component::Accessor, (arg0,): (wasmtime::component::Resource,)| { wasmtime::component::__internal::Box::pin(async move { let host = &caller.with_getter(host_getter); let r = ::foo(host, arg0).await; Ok(r) }) }, )?; } } Ok(()) } pub fn add_to_linker( linker: &mut wasmtime::component::Linker, options: &LinkOptions, host_getter: fn(&mut T) -> D::Data<'_>, ) -> wasmtime::Result<()> where D: foo::foo::the_interface::HostWithStore + TheWorldImportsWithStore + Send, for<'a> D::Data<'a>: foo::foo::the_interface::Host + TheWorldImports + Send, T: 'static + Send, { if options.experimental_world { Self::add_to_linker_imports::(linker, options, host_getter)?; if options.experimental_world_interface_import { foo::foo::the_interface::add_to_linker::< T, D, >(linker, &options.into(), host_getter)?; } } Ok(()) } } }; pub mod foo { pub mod foo { #[allow(clippy::all)] pub mod the_interface { #[allow(unused_imports)] use wasmtime::component::__internal::Box; /// Link-time configurations. #[derive(Clone, Debug, Default)] pub struct LinkOptions { experimental_interface: bool, experimental_interface_function: bool, experimental_interface_resource: bool, experimental_interface_resource_method: bool, } impl LinkOptions { /// Enable members marked as `@unstable(feature = experimental-interface)` pub fn experimental_interface(&mut self, enabled: bool) -> &mut Self { self.experimental_interface = enabled; self } /// Enable members marked as `@unstable(feature = experimental-interface-function)` pub fn experimental_interface_function( &mut self, enabled: bool, ) -> &mut Self { self.experimental_interface_function = enabled; self } /// Enable members marked as `@unstable(feature = experimental-interface-resource)` pub fn experimental_interface_resource( &mut self, enabled: bool, ) -> &mut Self { self.experimental_interface_resource = enabled; self } /// Enable members marked as `@unstable(feature = experimental-interface-resource-method)` pub fn experimental_interface_resource_method( &mut self, enabled: bool, ) -> &mut Self { self.experimental_interface_resource_method = enabled; self } } pub enum Bar {} pub trait HostBarWithStore: wasmtime::component::HasData + Send { fn drop( accessor: &wasmtime::component::Accessor, rep: wasmtime::component::Resource, ) -> impl ::core::future::Future> + Send where Self: Sized; fn foo( accessor: &wasmtime::component::Accessor, self_: wasmtime::component::Resource, ) -> impl ::core::future::Future + Send; } pub trait HostBar: Send {} impl<_T: HostBar + ?Sized + Send> HostBar for &mut _T {} pub trait HostWithStore: wasmtime::component::HasData + HostBarWithStore + Send { fn foo( accessor: &wasmtime::component::Accessor, ) -> impl ::core::future::Future + Send; } pub trait Host: HostBar + Send {} impl<_T: Host + ?Sized + Send> Host for &mut _T {} pub fn add_to_linker( linker: &mut wasmtime::component::Linker, options: &LinkOptions, host_getter: fn(&mut T) -> D::Data<'_>, ) -> wasmtime::Result<()> where D: HostWithStore, for<'a> D::Data<'a>: Host, T: 'static + Send, { if options.experimental_interface { let mut inst = linker.instance("foo:foo/the-interface")?; if options.experimental_interface_resource { inst.resource_concurrent( "bar", wasmtime::component::ResourceType::host::(), move |caller: &wasmtime::component::Accessor, rep| { wasmtime::component::__internal::Box::pin(async move { let accessor = &caller.with_getter(host_getter); wasmtime::ToWasmtimeResult::to_wasmtime_result( HostBarWithStore::drop( accessor, wasmtime::component::Resource::new_own(rep), ) .await, ) }) }, )?; } if options.experimental_interface_function { inst.func_wrap_concurrent( "foo", move |caller: &wasmtime::component::Accessor, (): ()| { wasmtime::component::__internal::Box::pin(async move { let host = &caller.with_getter(host_getter); let r = ::foo(host).await; Ok(r) }) }, )?; } if options.experimental_interface_resource_method { inst.func_wrap_concurrent( "[method]bar.foo", move | caller: &wasmtime::component::Accessor, (arg0,): (wasmtime::component::Resource,)| { wasmtime::component::__internal::Box::pin(async move { let host = &caller.with_getter(host_getter); let r = ::foo(host, arg0).await; Ok(r) }) }, )?; } } Ok(()) } } } }