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use std::mem;
use std::ptr;
#[repr(C)]
pub struct RustVec<T> {
repr: Vec<T>,
}
macro_rules! attr {
(#[$name:ident = $value:expr] $($rest:tt)*) => {
#[$name = $value]
$($rest)*
};
}
macro_rules! rust_vec_shims_for_primitive {
($ty:ident) => {
const_assert_eq!(mem::size_of::<[usize; 3]>(), mem::size_of::<Vec<$ty>>());
const_assert_eq!(mem::align_of::<usize>(), mem::align_of::<Vec<$ty>>());
const _: () = {
attr! {
#[export_name = concat!("cxxbridge03$rust_vec$", stringify!($ty), "$new")]
unsafe extern "C" fn __new(this: *mut RustVec<$ty>) {
ptr::write(this, RustVec { repr: Vec::new() });
}
}
attr! {
#[export_name = concat!("cxxbridge03$rust_vec$", stringify!($ty), "$drop")]
unsafe extern "C" fn __drop(this: *mut RustVec<$ty>) {
ptr::drop_in_place(this);
}
}
attr! {
#[export_name = concat!("cxxbridge03$rust_vec$", stringify!($ty), "$len")]
unsafe extern "C" fn __len(this: *const RustVec<$ty>) -> usize {
(*this).repr.len()
}
}
attr! {
#[export_name = concat!("cxxbridge03$rust_vec$", stringify!($ty), "$data")]
unsafe extern "C" fn __data(this: *const RustVec<$ty>) -> *const $ty {
(*this).repr.as_ptr()
}
}
attr! {
#[export_name = concat!("cxxbridge03$rust_vec$", stringify!($ty), "$stride")]
unsafe extern "C" fn __stride() -> usize {
mem::size_of::<$ty>()
}
}
};
};
}
rust_vec_shims_for_primitive!(u8);
rust_vec_shims_for_primitive!(u16);
rust_vec_shims_for_primitive!(u32);
rust_vec_shims_for_primitive!(u64);
rust_vec_shims_for_primitive!(i8);
rust_vec_shims_for_primitive!(i16);
rust_vec_shims_for_primitive!(i32);
rust_vec_shims_for_primitive!(i64);
rust_vec_shims_for_primitive!(f32);
rust_vec_shims_for_primitive!(f64);
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