1 /// Auto-generated bindings for a pre-instantiated version of a
2 /// component which implements the world `nope`.
3 ///
4 /// This structure is created through [`NopePre::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 [`Nope`] as well.
9 pub struct NopePre<T: 'static> {
10     instance_pre: wasmtime::component::InstancePre<T>,
11     indices: NopeIndices,
12 }
13 impl<T: 'static> Clone for NopePre<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> NopePre<_T> {
22     /// Creates a new copy of `NopePre` 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 = NopeIndices::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 [`Nope`] 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 fn instantiate(
47         &self,
48         mut store: impl wasmtime::AsContextMut<Data = _T>,
49     ) -> wasmtime::Result<Nope> {
50         let mut store = store.as_context_mut();
51         let instance = self.instance_pre.instantiate(&mut store)?;
52         self.indices.load(&mut store, &instance)
53     }
54 }
55 impl<_T: Send + 'static> NopePre<_T> {
56     /// Same as [`Self::instantiate`], except with `async`.
57     pub async fn instantiate_async(
58         &self,
59         mut store: impl wasmtime::AsContextMut<Data = _T>,
60     ) -> wasmtime::Result<Nope> {
61         let mut store = store.as_context_mut();
62         let instance = self.instance_pre.instantiate_async(&mut store).await?;
63         self.indices.load(&mut store, &instance)
64     }
65 }
66 /// Auto-generated bindings for index of the exports of
67 /// `nope`.
68 ///
69 /// This is an implementation detail of [`NopePre`] and can
70 /// be constructed if needed as well.
71 ///
72 /// For more information see [`Nope`] as well.
73 #[derive(Clone)]
74 pub struct NopeIndices {}
75 /// Auto-generated bindings for an instance a component which
76 /// implements the world `nope`.
77 ///
78 /// This structure can be created through a number of means
79 /// depending on your requirements and what you have on hand:
80 ///
81 /// * The most convenient way is to use
82 ///   [`Nope::instantiate`] which only needs a
83 ///   [`Store`], [`Component`], and [`Linker`].
84 ///
85 /// * Alternatively you can create a [`NopePre`] ahead of
86 ///   time with a [`Component`] to front-load string lookups
87 ///   of exports once instead of per-instantiation. This
88 ///   method then uses [`NopePre::instantiate`] to
89 ///   create a [`Nope`].
90 ///
91 /// * If you've instantiated the instance yourself already
92 ///   then you can use [`Nope::new`].
93 ///
94 /// These methods are all equivalent to one another and move
95 /// around the tradeoff of what work is performed when.
96 ///
97 /// [`Store`]: wasmtime::Store
98 /// [`Component`]: wasmtime::component::Component
99 /// [`Linker`]: wasmtime::component::Linker
100 pub struct Nope {}
101 const _: () = {
102     #[allow(unused_imports)]
103     use wasmtime::component::__internal::anyhow;
104     impl NopeIndices {
105         /// Creates a new copy of `NopeIndices` bindings which can then
106         /// be used to instantiate into a particular store.
107         ///
108         /// This method may fail if the component does not have the
109         /// required exports.
110         pub fn new<_T>(
111             _instance_pre: &wasmtime::component::InstancePre<_T>,
112         ) -> wasmtime::Result<Self> {
113             let _component = _instance_pre.component();
114             let _instance_type = _instance_pre.instance_type();
115             Ok(NopeIndices {})
116         }
117         /// Uses the indices stored in `self` to load an instance
118         /// of [`Nope`] from the instance provided.
119         ///
120         /// Note that at this time this method will additionally
121         /// perform type-checks of all exports.
122         pub fn load(
123             &self,
124             mut store: impl wasmtime::AsContextMut,
125             instance: &wasmtime::component::Instance,
126         ) -> wasmtime::Result<Nope> {
127             let _ = &mut store;
128             let _instance = instance;
129             Ok(Nope {})
130         }
131     }
132     impl Nope {
133         /// Convenience wrapper around [`NopePre::new`] and
134         /// [`NopePre::instantiate`].
135         pub fn instantiate<_T>(
136             store: impl wasmtime::AsContextMut<Data = _T>,
137             component: &wasmtime::component::Component,
138             linker: &wasmtime::component::Linker<_T>,
139         ) -> wasmtime::Result<Nope> {
140             let pre = linker.instantiate_pre(component)?;
141             NopePre::new(pre)?.instantiate(store)
142         }
143         /// Convenience wrapper around [`NopeIndices::new`] and
144         /// [`NopeIndices::load`].
145         pub fn new(
146             mut store: impl wasmtime::AsContextMut,
147             instance: &wasmtime::component::Instance,
148         ) -> wasmtime::Result<Nope> {
149             let indices = NopeIndices::new(&instance.instance_pre(&store))?;
150             indices.load(&mut store, instance)
151         }
152         /// Convenience wrapper around [`NopePre::new`] and
153         /// [`NopePre::instantiate_async`].
154         pub async fn instantiate_async<_T>(
155             store: impl wasmtime::AsContextMut<Data = _T>,
156             component: &wasmtime::component::Component,
157             linker: &wasmtime::component::Linker<_T>,
158         ) -> wasmtime::Result<Nope>
159         where
160             _T: Send,
161         {
162             let pre = linker.instantiate_pre(component)?;
163             NopePre::new(pre)?.instantiate_async(store).await
164         }
165         pub fn add_to_linker<T, D>(
166             linker: &mut wasmtime::component::Linker<T>,
167             host_getter: fn(&mut T) -> D::Data<'_>,
168         ) -> wasmtime::Result<()>
169         where
170             D: foo::foo::a::HostWithStore + Send,
171             for<'a> D::Data<'a>: foo::foo::a::Host + Send,
172             T: 'static + Send,
173         {
174             foo::foo::a::add_to_linker::<T, D>(linker, host_getter)?;
175             Ok(())
176         }
177     }
178 };
179 pub mod foo {
180     pub mod foo {
181         #[allow(clippy::all)]
182         pub mod a {
183             #[allow(unused_imports)]
184             use wasmtime::component::__internal::{anyhow, Box};
185             #[derive(wasmtime::component::ComponentType)]
186             #[derive(wasmtime::component::Lift)]
187             #[derive(wasmtime::component::Lower)]
188             #[component(variant)]
189             #[derive(Clone)]
190             pub enum Error {
191                 #[component(name = "other")]
192                 Other(wasmtime::component::__internal::String),
193             }
194             impl core::fmt::Debug for Error {
195                 fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
196                     match self {
197                         Error::Other(e) => {
198                             f.debug_tuple("Error::Other").field(e).finish()
199                         }
200                     }
201                 }
202             }
203             impl core::fmt::Display for Error {
204                 fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
205                     write!(f, "{:?}", self)
206                 }
207             }
208             impl core::error::Error for Error {}
209             const _: () = {
210                 assert!(12 == < Error as wasmtime::component::ComponentType >::SIZE32);
211                 assert!(4 == < Error as wasmtime::component::ComponentType >::ALIGN32);
212             };
213             pub trait HostWithStore: wasmtime::component::HasData + Send {
214                 fn g<T>(
215                     accessor: &wasmtime::component::Accessor<T, Self>,
216                 ) -> impl ::core::future::Future<Output = Result<(), Error>> + Send;
217             }
218             pub trait Host: Send {}
219             impl<_T: Host + ?Sized + Send> Host for &mut _T {}
220             pub fn add_to_linker<T, D>(
221                 linker: &mut wasmtime::component::Linker<T>,
222                 host_getter: fn(&mut T) -> D::Data<'_>,
223             ) -> wasmtime::Result<()>
224             where
225                 D: HostWithStore,
226                 for<'a> D::Data<'a>: Host,
227                 T: 'static + Send,
228             {
229                 let mut inst = linker.instance("foo:foo/a")?;
230                 inst.func_wrap_concurrent(
231                     "g",
232                     move |caller: &wasmtime::component::Accessor<T>, (): ()| {
233                         wasmtime::component::__internal::Box::pin(async move {
234                             let host = &caller.with_getter(host_getter);
235                             let r = <D as HostWithStore>::g(host).await;
236                             Ok((r,))
237                         })
238                     },
239                 )?;
240                 Ok(())
241             }
242         }
243     }
244 }
245