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feat(c-api) Implement From<&[T]> for wasm_$name_vec_t for boxed vec.

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This commit is contained in:
Ivan Enderlin
2020-12-17 14:17:17 +01:00
parent 4abf6f81da
commit 43026e651e
1 changed files with 26 additions and 2 deletions
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28
lib/c-api/src/wasm_c_api/macros.rs
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@@ -42,7 +42,7 @@ int main() {
macro_rules! wasm_declare_vec {
($name:ident) => {
paste::paste! {
#[doc = "Represents of a vector of `wasm_" $name "_t`.
#[doc = "Represents a vector of `wasm_" $name "_t`.
Read the documentation of [`wasm_" $name "_t`] to see more concrete examples.
@@ -107,6 +107,7 @@ int main() {
.into_boxed_slice();
let data = copied_data.as_mut_ptr();
::std::mem::forget(copied_data);
Self {
size,
data,
@@ -183,7 +184,9 @@ int main() {
macro_rules! wasm_declare_boxed_vec {
($name:ident) => {
paste::paste! {
#[doc = "Represents of a vector of [`wasm_" $name "_t`]."]
#[doc = "Represents a vector of `wasm_" $name "_t`.
Read the documentation of [`wasm_" $name "_t`] to see more concrete examples."]
#[derive(Debug)]
#[repr(C)]
pub struct [<wasm_ $name _vec_t>] {
@@ -206,6 +209,27 @@ macro_rules! wasm_declare_boxed_vec {
}
}
impl<'a, T: Into<[<wasm_ $name _t>]> + Clone> From<&'a [T]> for [<wasm_ $name _vec_t>] {
fn from(other: &'a [T]) -> Self {
let size = other.len();
let mut copied_data = other
.iter()
.cloned()
.map(Into::into)
.map(Box::new)
.map(Box::into_raw)
.collect::<Vec<*mut [<wasm_ $name _t>]>>()
.into_boxed_slice();
let data = copied_data.as_mut_ptr();
::std::mem::forget(copied_data);
Self {
size,
data,
}
}
}
// TODO: do this properly
impl [<wasm_ $name _vec_t>] {
pub unsafe fn into_slice(&self) -> Option<&[Box<[<wasm_ $name _t>]>]>{