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/// Auto-generated bindings for a pre-instantiated version of a
/// component which implements the world `imports`.
///
/// This structure is created through [`ImportsPre::new`] which
/// takes a [`InstancePre`](wasmtime::component::InstancePre) that
/// has been created through a [`Linker`](wasmtime::component::Linker).
///
/// For more information see [`Imports`] as well.
pub struct ImportsPre<T: 'static> {
instance_pre: wasmtime::component::InstancePre<T>,
indices: ImportsIndices,
}
impl<T: 'static> Clone for ImportsPre<T> {
fn clone(&self) -> Self {
Self {
instance_pre: self.instance_pre.clone(),
indices: self.indices.clone(),
}
}
}
impl<_T: 'static> ImportsPre<_T> {
/// Creates a new copy of `ImportsPre` 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<Self> {
let indices = ImportsIndices::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 [`Imports`] 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<Data = _T>,
) -> wasmtime::Result<Imports> {
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> ImportsPre<_T> {
/// Same as [`Self::instantiate`], except with `async`.
pub async fn instantiate_async(
&self,
mut store: impl wasmtime::AsContextMut<Data = _T>,
) -> wasmtime::Result<Imports> {
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
/// `imports`.
///
/// This is an implementation detail of [`ImportsPre`] and can
/// be constructed if needed as well.
///
/// For more information see [`Imports`] as well.
#[derive(Clone)]
pub struct ImportsIndices {}
/// Auto-generated bindings for an instance a component which
/// implements the world `imports`.
///
/// 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
/// [`Imports::instantiate`] which only needs a
/// [`Store`], [`Component`], and [`Linker`].
///
/// * Alternatively you can create a [`ImportsPre`] ahead of
/// time with a [`Component`] to front-load string lookups
/// of exports once instead of per-instantiation. This
/// method then uses [`ImportsPre::instantiate`] to
/// create a [`Imports`].
///
/// * If you've instantiated the instance yourself already
/// then you can use [`Imports::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 Imports {}
const _: () = {
impl ImportsIndices {
/// Creates a new copy of `ImportsIndices` 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<Self> {
let _component = _instance_pre.component();
let _instance_type = _instance_pre.instance_type();
Ok(ImportsIndices {})
}
/// Uses the indices stored in `self` to load an instance
/// of [`Imports`] 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<Imports> {
let _ = &mut store;
let _instance = instance;
Ok(Imports {})
}
}
impl Imports {
/// Convenience wrapper around [`ImportsPre::new`] and
/// [`ImportsPre::instantiate`].
pub fn instantiate<_T>(
store: impl wasmtime::AsContextMut<Data = _T>,
component: &wasmtime::component::Component,
linker: &wasmtime::component::Linker<_T>,
) -> wasmtime::Result<Imports> {
let pre = linker.instantiate_pre(component)?;
ImportsPre::new(pre)?.instantiate(store)
}
/// Convenience wrapper around [`ImportsIndices::new`] and
/// [`ImportsIndices::load`].
pub fn new(
mut store: impl wasmtime::AsContextMut,
instance: &wasmtime::component::Instance,
) -> wasmtime::Result<Imports> {
let indices = ImportsIndices::new(&instance.instance_pre(&store))?;
indices.load(&mut store, instance)
}
/// Convenience wrapper around [`ImportsPre::new`] and
/// [`ImportsPre::instantiate_async`].
pub async fn instantiate_async<_T>(
store: impl wasmtime::AsContextMut<Data = _T>,
component: &wasmtime::component::Component,
linker: &wasmtime::component::Linker<_T>,
) -> wasmtime::Result<Imports>
where
_T: Send,
{
let pre = linker.instantiate_pre(component)?;
ImportsPre::new(pre)?.instantiate_async(store).await
}
pub fn add_to_linker<T, D>(
linker: &mut wasmtime::component::Linker<T>,
host_getter: fn(&mut T) -> D::Data<'_>,
) -> wasmtime::Result<()>
where
D: a::b::interface_with_live_type::HostWithStore
+ a::b::interface_with_dead_type::HostWithStore + Send,
for<'a> D::Data<
'a,
>: a::b::interface_with_live_type::Host
+ a::b::interface_with_dead_type::Host + Send,
T: 'static + Send,
{
a::b::interface_with_live_type::add_to_linker::<T, D>(linker, host_getter)?;
a::b::interface_with_dead_type::add_to_linker::<T, D>(linker, host_getter)?;
Ok(())
}
}
};
pub mod a {
pub mod b {
#[allow(clippy::all)]
pub mod interface_with_live_type {
#[allow(unused_imports)]
use wasmtime::component::__internal::Box;
#[derive(wasmtime::component::ComponentType)]
#[derive(wasmtime::component::Lift)]
#[derive(wasmtime::component::Lower)]
#[component(record)]
#[derive(Clone, Copy)]
pub struct LiveType {
#[component(name = "a")]
pub a: u32,
}
impl core::fmt::Debug for LiveType {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
f.debug_struct("LiveType").field("a", &self.a).finish()
}
}
const _: () = {
assert!(4 == < LiveType as wasmtime::component::ComponentType >::SIZE32);
assert!(
4 == < LiveType as wasmtime::component::ComponentType >::ALIGN32
);
};
pub trait HostWithStore: wasmtime::component::HasData + Send {
fn f<T: Send>(
accessor: &wasmtime::component::Accessor<T, Self>,
) -> impl ::core::future::Future<Output = LiveType> + Send;
}
pub trait Host: Send {}
impl<_T: Host + ?Sized + Send> Host for &mut _T {}
pub fn add_to_linker<T, D>(
linker: &mut wasmtime::component::Linker<T>,
host_getter: fn(&mut T) -> D::Data<'_>,
) -> wasmtime::Result<()>
where
D: HostWithStore,
for<'a> D::Data<'a>: Host,
T: 'static + Send,
{
let mut inst = linker.instance("a:b/interface-with-live-type")?;
inst.func_wrap_concurrent(
"f",
move |caller: &wasmtime::component::Accessor<T>, (): ()| {
wasmtime::component::__internal::Box::pin(async move {
let host = &caller.with_getter(host_getter);
let r = <D as HostWithStore>::f(host).await;
Ok((r,))
})
},
)?;
Ok(())
}
}
#[allow(clippy::all)]
pub mod interface_with_dead_type {
#[allow(unused_imports)]
use wasmtime::component::__internal::Box;
pub type LiveType = super::super::super::a::b::interface_with_live_type::LiveType;
const _: () = {
assert!(4 == < LiveType as wasmtime::component::ComponentType >::SIZE32);
assert!(
4 == < LiveType as wasmtime::component::ComponentType >::ALIGN32
);
};
#[derive(wasmtime::component::ComponentType)]
#[derive(wasmtime::component::Lift)]
#[derive(wasmtime::component::Lower)]
#[component(record)]
#[derive(Clone, Copy)]
pub struct DeadType {
#[component(name = "a")]
pub a: u32,
}
impl core::fmt::Debug for DeadType {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
f.debug_struct("DeadType").field("a", &self.a).finish()
}
}
const _: () = {
assert!(4 == < DeadType as wasmtime::component::ComponentType >::SIZE32);
assert!(
4 == < DeadType as wasmtime::component::ComponentType >::ALIGN32
);
};
#[derive(wasmtime::component::ComponentType)]
#[derive(wasmtime::component::Lift)]
#[derive(wasmtime::component::Lower)]
#[component(variant)]
#[derive(Clone, Copy)]
pub enum V {
#[component(name = "a")]
A(LiveType),
#[component(name = "b")]
B(DeadType),
}
impl core::fmt::Debug for V {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
match self {
V::A(e) => f.debug_tuple("V::A").field(e).finish(),
V::B(e) => f.debug_tuple("V::B").field(e).finish(),
}
}
}
const _: () = {
assert!(8 == < V as wasmtime::component::ComponentType >::SIZE32);
assert!(4 == < V as wasmtime::component::ComponentType >::ALIGN32);
};
pub trait HostWithStore: wasmtime::component::HasData {}
impl<_T: ?Sized> HostWithStore for _T
where
_T: wasmtime::component::HasData,
{}
pub trait Host {}
impl<_T: Host + ?Sized> Host for &mut _T {}
pub fn add_to_linker<T, D>(
linker: &mut wasmtime::component::Linker<T>,
host_getter: fn(&mut T) -> D::Data<'_>,
) -> wasmtime::Result<()>
where
D: HostWithStore,
for<'a> D::Data<'a>: Host,
T: 'static,
{
let mut inst = linker.instance("a:b/interface-with-dead-type")?;
Ok(())
}
}
}
}