1 /// Auto-generated bindings for a pre-instantiated version of a
2 /// component which implements the world `imports`.
3 ///
4 /// This structure is created through [`ImportsPre::new`] which
5 /// takes a [`InstancePre`](wasmtime::component::InstancePre) that
6 /// has been created through a [`Linker`](wasmtime::component::Linker).
7 ///
8 /// For more information see [`Imports`] as well.
9 pub struct ImportsPre<T: 'static> {
10     instance_pre: wasmtime::component::InstancePre<T>,
11     indices: ImportsIndices,
12 }
13 impl<T: 'static> Clone for ImportsPre<T> {
14     fn clone(&self) -> Self {
15         Self {
16             instance_pre: self.instance_pre.clone(),
17             indices: self.indices.clone(),
18         }
19     }
20 }
21 impl<_T: 'static> ImportsPre<_T> {
22     /// Creates a new copy of `ImportsPre` bindings which can then
23     /// be used to instantiate into a particular store.
24     ///
25     /// This method may fail if the component behind `instance_pre`
26     /// does not have the required exports.
27     pub fn new(
28         instance_pre: wasmtime::component::InstancePre<_T>,
29     ) -> wasmtime::Result<Self> {
30         let indices = ImportsIndices::new(&instance_pre)?;
31         Ok(Self { instance_pre, indices })
32     }
33     pub fn engine(&self) -> &wasmtime::Engine {
34         self.instance_pre.engine()
35     }
36     pub fn instance_pre(&self) -> &wasmtime::component::InstancePre<_T> {
37         &self.instance_pre
38     }
39     /// Instantiates a new instance of [`Imports`] within the
40     /// `store` provided.
41     ///
42     /// This function will use `self` as the pre-instantiated
43     /// instance to perform instantiation. Afterwards the preloaded
44     /// indices in `self` are used to lookup all exports on the
45     /// resulting instance.
46     pub async fn instantiate_async(
47         &self,
48         mut store: impl wasmtime::AsContextMut<Data = _T>,
49     ) -> wasmtime::Result<Imports>
50     where
51         _T: Send,
52     {
53         let mut store = store.as_context_mut();
54         let instance = self.instance_pre.instantiate_async(&mut store).await?;
55         self.indices.load(&mut store, &instance)
56     }
57 }
58 /// Auto-generated bindings for index of the exports of
59 /// `imports`.
60 ///
61 /// This is an implementation detail of [`ImportsPre`] and can
62 /// be constructed if needed as well.
63 ///
64 /// For more information see [`Imports`] as well.
65 #[derive(Clone)]
66 pub struct ImportsIndices {}
67 /// Auto-generated bindings for an instance a component which
68 /// implements the world `imports`.
69 ///
70 /// This structure can be created through a number of means
71 /// depending on your requirements and what you have on hand:
72 ///
73 /// * The most convenient way is to use
74 ///   [`Imports::instantiate_async`] which only needs a
75 ///   [`Store`], [`Component`], and [`Linker`].
76 ///
77 /// * Alternatively you can create a [`ImportsPre`] ahead of
78 ///   time with a [`Component`] to front-load string lookups
79 ///   of exports once instead of per-instantiation. This
80 ///   method then uses [`ImportsPre::instantiate_async`] to
81 ///   create a [`Imports`].
82 ///
83 /// * If you've instantiated the instance yourself already
84 ///   then you can use [`Imports::new`].
85 ///
86 /// These methods are all equivalent to one another and move
87 /// around the tradeoff of what work is performed when.
88 ///
89 /// [`Store`]: wasmtime::Store
90 /// [`Component`]: wasmtime::component::Component
91 /// [`Linker`]: wasmtime::component::Linker
92 pub struct Imports {}
93 const _: () = {
94     #[allow(unused_imports)]
95     use wasmtime::component::__internal::anyhow;
96     impl ImportsIndices {
97         /// Creates a new copy of `ImportsIndices` bindings which can then
98         /// be used to instantiate into a particular store.
99         ///
100         /// This method may fail if the component does not have the
101         /// required exports.
102         pub fn new<_T>(
103             _instance_pre: &wasmtime::component::InstancePre<_T>,
104         ) -> wasmtime::Result<Self> {
105             let _component = _instance_pre.component();
106             let _instance_type = _instance_pre.instance_type();
107             Ok(ImportsIndices {})
108         }
109         /// Uses the indices stored in `self` to load an instance
110         /// of [`Imports`] from the instance provided.
111         ///
112         /// Note that at this time this method will additionally
113         /// perform type-checks of all exports.
114         pub fn load(
115             &self,
116             mut store: impl wasmtime::AsContextMut,
117             instance: &wasmtime::component::Instance,
118         ) -> wasmtime::Result<Imports> {
119             let _ = &mut store;
120             let _instance = instance;
121             Ok(Imports {})
122         }
123     }
124     impl Imports {
125         /// Convenience wrapper around [`ImportsPre::new`] and
126         /// [`ImportsPre::instantiate_async`].
127         pub async fn instantiate_async<_T>(
128             store: impl wasmtime::AsContextMut<Data = _T>,
129             component: &wasmtime::component::Component,
130             linker: &wasmtime::component::Linker<_T>,
131         ) -> wasmtime::Result<Imports>
132         where
133             _T: Send,
134         {
135             let pre = linker.instantiate_pre(component)?;
136             ImportsPre::new(pre)?.instantiate_async(store).await
137         }
138         /// Convenience wrapper around [`ImportsIndices::new`] and
139         /// [`ImportsIndices::load`].
140         pub fn new(
141             mut store: impl wasmtime::AsContextMut,
142             instance: &wasmtime::component::Instance,
143         ) -> wasmtime::Result<Imports> {
144             let indices = ImportsIndices::new(&instance.instance_pre(&store))?;
145             indices.load(&mut store, instance)
146         }
147         pub fn add_to_linker<T, D>(
148             linker: &mut wasmtime::component::Linker<T>,
149             host_getter: fn(&mut T) -> D::Data<'_>,
150         ) -> wasmtime::Result<()>
151         where
152             D: a::b::interface_with_live_type::HostConcurrent + Send,
153             for<'a> D::Data<
154                 'a,
155             >: a::b::interface_with_live_type::Host
156                 + a::b::interface_with_dead_type::Host + Send,
157             T: 'static + Send,
158         {
159             a::b::interface_with_live_type::add_to_linker::<T, D>(linker, host_getter)?;
160             a::b::interface_with_dead_type::add_to_linker::<T, D>(linker, host_getter)?;
161             Ok(())
162         }
163     }
164 };
165 pub mod a {
166     pub mod b {
167         #[allow(clippy::all)]
168         pub mod interface_with_live_type {
169             #[allow(unused_imports)]
170             use wasmtime::component::__internal::{anyhow, Box};
171             #[derive(wasmtime::component::ComponentType)]
172             #[derive(wasmtime::component::Lift)]
173             #[derive(wasmtime::component::Lower)]
174             #[component(record)]
175             #[derive(Clone, Copy)]
176             pub struct LiveType {
177                 #[component(name = "a")]
178                 pub a: u32,
179             }
180             impl core::fmt::Debug for LiveType {
181                 fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
182                     f.debug_struct("LiveType").field("a", &self.a).finish()
183                 }
184             }
185             const _: () = {
186                 assert!(4 == < LiveType as wasmtime::component::ComponentType >::SIZE32);
187                 assert!(
188                     4 == < LiveType as wasmtime::component::ComponentType >::ALIGN32
189                 );
190             };
191             #[wasmtime::component::__internal::trait_variant_make(::core::marker::Send)]
192             pub trait HostConcurrent: wasmtime::component::HasData + Send {
193                 fn f<T: 'static>(
194                     accessor: &wasmtime::component::Accessor<T, Self>,
195                 ) -> impl ::core::future::Future<Output = LiveType> + Send
196                 where
197                     Self: Sized;
198             }
199             #[wasmtime::component::__internal::trait_variant_make(::core::marker::Send)]
200             pub trait Host: Send {}
201             impl<_T: Host + ?Sized + Send> Host for &mut _T {}
202             pub fn add_to_linker<T, D>(
203                 linker: &mut wasmtime::component::Linker<T>,
204                 host_getter: fn(&mut T) -> D::Data<'_>,
205             ) -> wasmtime::Result<()>
206             where
207                 D: HostConcurrent,
208                 for<'a> D::Data<'a>: Host,
209                 T: 'static + Send,
210             {
211                 let mut inst = linker.instance("a:b/interface-with-live-type")?;
212                 inst.func_wrap_concurrent(
213                     "f",
214                     move |caller: &wasmtime::component::Accessor<T>, (): ()| {
215                         wasmtime::component::__internal::Box::pin(async move {
216                             let accessor = &mut unsafe { caller.with_data(host_getter) };
217                             let r = <D as HostConcurrent>::f(accessor).await;
218                             Ok((r,))
219                         })
220                     },
221                 )?;
222                 Ok(())
223             }
224         }
225         #[allow(clippy::all)]
226         pub mod interface_with_dead_type {
227             #[allow(unused_imports)]
228             use wasmtime::component::__internal::{anyhow, Box};
229             pub type LiveType = super::super::super::a::b::interface_with_live_type::LiveType;
230             const _: () = {
231                 assert!(4 == < LiveType as wasmtime::component::ComponentType >::SIZE32);
232                 assert!(
233                     4 == < LiveType as wasmtime::component::ComponentType >::ALIGN32
234                 );
235             };
236             #[derive(wasmtime::component::ComponentType)]
237             #[derive(wasmtime::component::Lift)]
238             #[derive(wasmtime::component::Lower)]
239             #[component(record)]
240             #[derive(Clone, Copy)]
241             pub struct DeadType {
242                 #[component(name = "a")]
243                 pub a: u32,
244             }
245             impl core::fmt::Debug for DeadType {
246                 fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
247                     f.debug_struct("DeadType").field("a", &self.a).finish()
248                 }
249             }
250             const _: () = {
251                 assert!(4 == < DeadType as wasmtime::component::ComponentType >::SIZE32);
252                 assert!(
253                     4 == < DeadType as wasmtime::component::ComponentType >::ALIGN32
254                 );
255             };
256             #[derive(wasmtime::component::ComponentType)]
257             #[derive(wasmtime::component::Lift)]
258             #[derive(wasmtime::component::Lower)]
259             #[component(variant)]
260             #[derive(Clone, Copy)]
261             pub enum V {
262                 #[component(name = "a")]
263                 A(LiveType),
264                 #[component(name = "b")]
265                 B(DeadType),
266             }
267             impl core::fmt::Debug for V {
268                 fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
269                     match self {
270                         V::A(e) => f.debug_tuple("V::A").field(e).finish(),
271                         V::B(e) => f.debug_tuple("V::B").field(e).finish(),
272                     }
273                 }
274             }
275             const _: () = {
276                 assert!(8 == < V as wasmtime::component::ComponentType >::SIZE32);
277                 assert!(4 == < V as wasmtime::component::ComponentType >::ALIGN32);
278             };
279             #[wasmtime::component::__internal::trait_variant_make(::core::marker::Send)]
280             pub trait Host: Send {}
281             impl<_T: Host + ?Sized + Send> Host for &mut _T {}
282             pub fn add_to_linker<T, D>(
283                 linker: &mut wasmtime::component::Linker<T>,
284                 host_getter: fn(&mut T) -> D::Data<'_>,
285             ) -> wasmtime::Result<()>
286             where
287                 D: wasmtime::component::HasData,
288                 for<'a> D::Data<'a>: Host,
289                 T: 'static + Send,
290             {
291                 let mut inst = linker.instance("a:b/interface-with-dead-type")?;
292                 Ok(())
293             }
294         }
295     }
296 }
297