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use crate::cxx_string::CxxString;
use core::ffi::c_void;
use core::fmt::{self, Display};
use core::marker::PhantomData;
use core::mem;
use core::ptr;
use core::slice;
#[repr(C, packed)]
pub struct CxxVector<T> {
_private: [T; 0],
}
impl<T> CxxVector<T>
where
T: VectorElement,
{
pub fn len(&self) -> usize {
T::__vector_size(self)
}
pub fn is_empty(&self) -> bool {
self.len() == 0
}
pub fn get(&self, pos: usize) -> Option<&T> {
if pos < self.len() {
Some(unsafe { self.get_unchecked(pos) })
} else {
None
}
}
pub unsafe fn get_unchecked(&self, pos: usize) -> &T {
&*T::__get_unchecked(self, pos)
}
pub fn as_slice(&self) -> &[T] {
let len = self.len();
if len == 0 {
&[]
} else {
let ptr = unsafe { T::__get_unchecked(self, 0) };
unsafe { slice::from_raw_parts(ptr, len) }
}
}
}
pub struct Iter<'a, T> {
v: &'a CxxVector<T>,
index: usize,
}
impl<'a, T> IntoIterator for &'a CxxVector<T>
where
T: VectorElement,
{
type Item = &'a T;
type IntoIter = Iter<'a, T>;
fn into_iter(self) -> Self::IntoIter {
Iter { v: self, index: 0 }
}
}
impl<'a, T> Iterator for Iter<'a, T>
where
T: VectorElement,
{
type Item = &'a T;
fn next(&mut self) -> Option<Self::Item> {
let next = self.v.get(self.index);
self.index += 1;
next
}
}
pub struct TypeName<T> {
element: PhantomData<T>,
}
impl<T> TypeName<T> {
pub const fn new() -> Self {
TypeName {
element: PhantomData,
}
}
}
impl<T> Display for TypeName<T>
where
T: VectorElement,
{
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
write!(formatter, "CxxVector<{}>", T::__NAME)
}
}
#[doc(hidden)]
pub unsafe trait VectorElement: Sized {
const __NAME: &'static dyn Display;
fn __vector_size(v: &CxxVector<Self>) -> usize;
unsafe fn __get_unchecked(v: &CxxVector<Self>, pos: usize) -> *const Self;
fn __unique_ptr_null() -> *mut c_void;
unsafe fn __unique_ptr_raw(raw: *mut CxxVector<Self>) -> *mut c_void;
unsafe fn __unique_ptr_get(repr: *mut c_void) -> *const CxxVector<Self>;
unsafe fn __unique_ptr_release(repr: *mut c_void) -> *mut CxxVector<Self>;
unsafe fn __unique_ptr_drop(repr: *mut c_void);
}
macro_rules! impl_vector_element {
($segment:expr, $name:expr, $ty:ty) => {
const_assert_eq!(1, mem::align_of::<CxxVector<$ty>>());
unsafe impl VectorElement for $ty {
const __NAME: &'static dyn Display = &$name;
fn __vector_size(v: &CxxVector<$ty>) -> usize {
extern "C" {
attr! {
#[link_name = concat!("cxxbridge05$std$vector$", $segment, "$size")]
fn __vector_size(_: &CxxVector<$ty>) -> usize;
}
}
unsafe { __vector_size(v) }
}
unsafe fn __get_unchecked(v: &CxxVector<$ty>, pos: usize) -> *const $ty {
extern "C" {
attr! {
#[link_name = concat!("cxxbridge05$std$vector$", $segment, "$get_unchecked")]
fn __get_unchecked(_: &CxxVector<$ty>, _: usize) -> *const $ty;
}
}
__get_unchecked(v, pos)
}
fn __unique_ptr_null() -> *mut c_void {
extern "C" {
attr! {
#[link_name = concat!("cxxbridge05$unique_ptr$std$vector$", $segment, "$null")]
fn __unique_ptr_null(this: *mut *mut c_void);
}
}
let mut repr = ptr::null_mut::<c_void>();
unsafe { __unique_ptr_null(&mut repr) }
repr
}
unsafe fn __unique_ptr_raw(raw: *mut CxxVector<Self>) -> *mut c_void {
extern "C" {
attr! {
#[link_name = concat!("cxxbridge05$unique_ptr$std$vector$", $segment, "$raw")]
fn __unique_ptr_raw(this: *mut *mut c_void, raw: *mut CxxVector<$ty>);
}
}
let mut repr = ptr::null_mut::<c_void>();
__unique_ptr_raw(&mut repr, raw);
repr
}
unsafe fn __unique_ptr_get(repr: *mut c_void) -> *const CxxVector<Self> {
extern "C" {
attr! {
#[link_name = concat!("cxxbridge05$unique_ptr$std$vector$", $segment, "$get")]
fn __unique_ptr_get(this: *const *mut c_void) -> *const CxxVector<$ty>;
}
}
__unique_ptr_get(&repr)
}
unsafe fn __unique_ptr_release(mut repr: *mut c_void) -> *mut CxxVector<Self> {
extern "C" {
attr! {
#[link_name = concat!("cxxbridge05$unique_ptr$std$vector$", $segment, "$release")]
fn __unique_ptr_release(this: *mut *mut c_void) -> *mut CxxVector<$ty>;
}
}
__unique_ptr_release(&mut repr)
}
unsafe fn __unique_ptr_drop(mut repr: *mut c_void) {
extern "C" {
attr! {
#[link_name = concat!("cxxbridge05$unique_ptr$std$vector$", $segment, "$drop")]
fn __unique_ptr_drop(this: *mut *mut c_void);
}
}
__unique_ptr_drop(&mut repr);
}
}
};
}
macro_rules! impl_vector_element_for_primitive {
($ty:ident) => {
impl_vector_element!(stringify!($ty), stringify!($ty), $ty);
};
}
impl_vector_element_for_primitive!(u8);
impl_vector_element_for_primitive!(u16);
impl_vector_element_for_primitive!(u32);
impl_vector_element_for_primitive!(u64);
impl_vector_element_for_primitive!(usize);
impl_vector_element_for_primitive!(i8);
impl_vector_element_for_primitive!(i16);
impl_vector_element_for_primitive!(i32);
impl_vector_element_for_primitive!(i64);
impl_vector_element_for_primitive!(isize);
impl_vector_element_for_primitive!(f32);
impl_vector_element_for_primitive!(f64);
impl_vector_element!("string", "CxxString", CxxString);