alloc/io/
impls.rs

1use crate::boxed::Box;
2use crate::io::{self, Seek, SeekFrom, SizeHint};
3#[cfg(all(not(no_rc), not(no_sync), target_has_atomic = "ptr"))]
4use crate::sync::Arc;
5
6// =============================================================================
7// Forwarding implementations
8
9#[doc(hidden)]
10#[unstable(feature = "core_io_internals", reason = "exposed only for libstd", issue = "none")]
11impl<T> SizeHint for Box<T> {
12    #[inline]
13    fn lower_bound(&self) -> usize {
14        SizeHint::lower_bound(&**self)
15    }
16
17    #[inline]
18    fn upper_bound(&self) -> Option<usize> {
19        SizeHint::upper_bound(&**self)
20    }
21}
22
23#[stable(feature = "rust1", since = "1.0.0")]
24impl<S: Seek + ?Sized> Seek for Box<S> {
25    #[inline]
26    fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
27        (**self).seek(pos)
28    }
29
30    #[inline]
31    fn rewind(&mut self) -> io::Result<()> {
32        (**self).rewind()
33    }
34
35    #[inline]
36    fn stream_len(&mut self) -> io::Result<u64> {
37        (**self).stream_len()
38    }
39
40    #[inline]
41    fn stream_position(&mut self) -> io::Result<u64> {
42        (**self).stream_position()
43    }
44
45    #[inline]
46    fn seek_relative(&mut self, offset: i64) -> io::Result<()> {
47        (**self).seek_relative(offset)
48    }
49}
50
51// =============================================================================
52// In-memory buffer implementations
53
54#[cfg(all(not(no_rc), not(no_sync), target_has_atomic = "ptr"))]
55#[stable(feature = "io_traits_arc", since = "1.73.0")]
56impl<S: Seek + ?Sized> Seek for Arc<S>
57where
58    for<'a> &'a S: Seek,
59    S: crate::io::IoHandle,
60{
61    #[inline]
62    fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
63        (&**self).seek(pos)
64    }
65
66    #[inline]
67    fn rewind(&mut self) -> io::Result<()> {
68        (&**self).rewind()
69    }
70
71    #[inline]
72    fn stream_len(&mut self) -> io::Result<u64> {
73        (&**self).stream_len()
74    }
75
76    #[inline]
77    fn stream_position(&mut self) -> io::Result<u64> {
78        (&**self).stream_position()
79    }
80
81    #[inline]
82    fn seek_relative(&mut self, offset: i64) -> io::Result<()> {
83        (&**self).seek_relative(offset)
84    }
85}
alloc/io/impls.rs

alloc/io/
impls.rs
