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pub use wasmtime_rust_macro::wasmtime;
#[doc(hidden)]
pub mod __rt {
pub use anyhow;
pub use wasmtime;
pub use wasmtime_wasi;
use std::convert::{TryFrom, TryInto};
pub trait FromVecValue: Sized {
fn from(list: Vec<wasmtime::Val>) -> anyhow::Result<Self>;
}
macro_rules! tuple {
($(($($a:ident),*),)*) => ($(
impl<$($a: TryFrom<wasmtime::Val>),*> FromVecValue for ($($a,)*)
where $(anyhow::Error: From<$a::Error>,)*
{
#[allow(non_snake_case)]
fn from(list: Vec<wasmtime::Val>) -> anyhow::Result<Self> {
let mut iter = list.into_iter();
$(
let $a = iter.next()
.ok_or_else(|| anyhow::format_err!("not enough values"))?
.try_into()?;
)*
if iter.next().is_some() {
anyhow::bail!("too many return values");
}
Ok(($($a,)*))
}
}
)*)
}
tuple! {
(),
(A),
(A, B),
(A, B, C),
}
}