use crate::{Result};
use crate::private::layout::{CapTable, ListReader, StructReader, StructBuilder, StructSize,
PointerBuilder, PointerReader};
use std::marker::PhantomData;
pub trait FromStructReader<'a> {
fn new(reader: StructReader<'a>) -> Self;
}
pub trait HasStructSize {
fn struct_size() -> StructSize;
}
pub trait IntoInternalStructReader<'a> {
fn into_internal_struct_reader(self) -> StructReader<'a>;
}
pub trait FromStructBuilder<'a> {
fn new(struct_builder: StructBuilder<'a>) -> Self;
}
pub trait IntoInternalListReader<'a> {
fn into_internal_list_reader(self) -> ListReader<'a>;
}
pub trait FromPointerReader<'a> : Sized {
fn get_from_pointer(reader: &PointerReader<'a>, default: Option<&'a [crate::Word]>) -> Result<Self>;
}
pub trait Owned<'a> {
type Reader: FromPointerReader<'a> + SetPointerBuilder<Self::Builder>;
type Builder: FromPointerBuilder<'a>;
}
pub trait OwnedStruct<'a> {
type Reader: FromStructReader<'a> + SetPointerBuilder<Self::Builder> + IntoInternalStructReader<'a>;
type Builder: FromStructBuilder<'a> + HasStructSize;
}
pub trait Pipelined {
type Pipeline;
}
pub trait FromPointerBuilder<'a> : Sized {
fn init_pointer(builder: PointerBuilder<'a>, length: u32) -> Self;
fn get_from_pointer(builder: PointerBuilder<'a>, default: Option<&'a [crate::Word]>) -> Result<Self>;
}
pub trait SetPointerBuilder<To> {
fn set_pointer_builder<'a>(builder: PointerBuilder<'a>, from: Self, canonicalize: bool) -> Result<()>;
}
pub trait Imbue<'a> {
fn imbue(&mut self, caps: &'a CapTable);
}
pub trait ImbueMut<'a> {
fn imbue_mut(&mut self, caps: &'a mut CapTable);
}
pub trait HasTypeId {
fn type_id() -> u64;
}
pub trait ToU16 {
fn to_u16(self) -> u16;
}
pub trait FromU16 : Sized {
fn from_u16(value: u16) -> ::std::result::Result<Self, crate::NotInSchema>;
}
pub trait IndexMove<I, T> {
fn index_move(&self, index: I) -> T;
}
pub struct ListIter<T, U> {
marker: PhantomData<U>,
list: T,
index: u32,
size: u32,
}
impl <T, U> ListIter<T, U>{
pub fn new(list: T, size: u32) -> ListIter<T, U> {
ListIter { list: list, index: 0, size: size, marker: PhantomData }
}
}
impl <U, T : IndexMove<u32, U>> ::std::iter::Iterator for ListIter<T, U> {
type Item = U;
fn next(&mut self) -> ::std::option::Option<U> {
if self.index < self.size {
let result = self.list.index_move(self.index);
self.index += 1;
Some(result)
} else {
None
}
}
fn size_hint(&self) -> (usize, Option<usize>){
(self.size as usize, Some(self.size as usize))
}
fn nth(&mut self, p: usize) -> Option<U>{
if self.index + (p as u32) < self.size {
self.index += p as u32;
let result = self.list.index_move(self.index);
self.index += 1;
Some(result)
} else {
self.index = self.size;
None
}
}
}
impl <U, T: IndexMove<u32, U>> ::std::iter::ExactSizeIterator for ListIter<T, U>{
fn len(&self) -> usize{
self.size as usize
}
}
impl <U, T: IndexMove<u32, U>> ::std::iter::DoubleEndedIterator for ListIter<T, U>{
fn next_back(&mut self) -> ::std::option::Option<U> {
if self.size > self.index {
self.size -= 1;
Some(self.list.index_move(self.size))
} else {
None
}
}
}