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Make IoSlice and IoSliceMut methods unstably const #144090

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12 changes: 8 additions & 4 deletions library/std/src/io/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1338,8 +1338,9 @@ impl<'a> IoSliceMut<'a> {
///
/// Panics on Windows if the slice is larger than 4GB.
#[stable(feature = "iovec", since = "1.36.0")]
#[rustc_const_unstable(feature = "io_slice_const", issue = "none")]
#[inline]
pub fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
pub const fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
IoSliceMut(sys::io::IoSliceMut::new(buf))
}

Expand All @@ -1366,8 +1367,9 @@ impl<'a> IoSliceMut<'a> {
/// assert_eq!(buf.deref(), [1; 5].as_ref());
/// ```
#[stable(feature = "io_slice_advance", since = "1.81.0")]
#[rustc_const_unstable(feature = "io_slice_const", issue = "none")]
#[inline]
pub fn advance(&mut self, n: usize) {
pub const fn advance(&mut self, n: usize) {
self.0.advance(n)
}

Expand Down Expand Up @@ -1496,9 +1498,10 @@ impl<'a> IoSlice<'a> {
///
/// Panics on Windows if the slice is larger than 4GB.
#[stable(feature = "iovec", since = "1.36.0")]
#[rustc_const_unstable(feature = "io_slice_const", issue = "none")]
#[must_use]
#[inline]
pub fn new(buf: &'a [u8]) -> IoSlice<'a> {
pub const fn new(buf: &'a [u8]) -> IoSlice<'a> {
IoSlice(sys::io::IoSlice::new(buf))
}

Expand All @@ -1525,8 +1528,9 @@ impl<'a> IoSlice<'a> {
/// assert_eq!(buf.deref(), [1; 5].as_ref());
/// ```
#[stable(feature = "io_slice_advance", since = "1.81.0")]
#[rustc_const_unstable(feature = "io_slice_const", issue = "none")]
#[inline]
pub fn advance(&mut self, n: usize) {
pub const fn advance(&mut self, n: usize) {
self.0.advance(n)
}

Expand Down
12 changes: 6 additions & 6 deletions library/std/src/sys/io/io_slice/iovec.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -18,15 +18,15 @@ pub struct IoSlice<'a> {

impl<'a> IoSlice<'a> {
#[inline]
pub fn new(buf: &'a [u8]) -> IoSlice<'a> {
pub const fn new(buf: &'a [u8]) -> IoSlice<'a> {
IoSlice {
vec: iovec { iov_base: buf.as_ptr() as *mut u8 as *mut c_void, iov_len: buf.len() },
_p: PhantomData,
}
}

#[inline]
pub fn advance(&mut self, n: usize) {
pub const fn advance(&mut self, n: usize) {
if self.vec.iov_len < n {
panic!("advancing IoSlice beyond its length");
}
Expand All @@ -51,15 +51,15 @@ pub struct IoSliceMut<'a> {

impl<'a> IoSliceMut<'a> {
#[inline]
pub fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
pub const fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
IoSliceMut {
vec: iovec { iov_base: buf.as_mut_ptr() as *mut c_void, iov_len: buf.len() },
_p: PhantomData,
}
}

#[inline]
pub fn advance(&mut self, n: usize) {
pub const fn advance(&mut self, n: usize) {
if self.vec.iov_len < n {
panic!("advancing IoSliceMut beyond its length");
}
Expand All @@ -71,7 +71,7 @@ impl<'a> IoSliceMut<'a> {
}

#[inline]
pub fn as_slice(&self) -> &[u8] {
pub const fn as_slice(&self) -> &[u8] {
unsafe { slice::from_raw_parts(self.vec.iov_base as *mut u8, self.vec.iov_len) }
}

Expand All @@ -81,7 +81,7 @@ impl<'a> IoSliceMut<'a> {
}

#[inline]
pub fn as_mut_slice(&mut self) -> &mut [u8] {
pub const fn as_mut_slice(&mut self) -> &mut [u8] {
unsafe { slice::from_raw_parts_mut(self.vec.iov_base as *mut u8, self.vec.iov_len) }
}
}
12 changes: 6 additions & 6 deletions library/std/src/sys/io/io_slice/unsupported.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -5,12 +5,12 @@ pub struct IoSlice<'a>(&'a [u8]);

impl<'a> IoSlice<'a> {
#[inline]
pub fn new(buf: &'a [u8]) -> IoSlice<'a> {
pub const fn new(buf: &'a [u8]) -> IoSlice<'a> {
IoSlice(buf)
}

#[inline]
pub fn advance(&mut self, n: usize) {
pub const fn advance(&mut self, n: usize) {
self.0 = &self.0[n..]
}

Expand All @@ -24,19 +24,19 @@ pub struct IoSliceMut<'a>(&'a mut [u8]);

impl<'a> IoSliceMut<'a> {
#[inline]
pub fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
pub const fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
IoSliceMut(buf)
}

#[inline]
pub fn advance(&mut self, n: usize) {
pub const fn advance(&mut self, n: usize) {
let slice = mem::take(&mut self.0);
let (_, remaining) = slice.split_at_mut(n);
self.0 = remaining;
}

#[inline]
pub fn as_slice(&self) -> &[u8] {
pub const fn as_slice(&self) -> &[u8] {
self.0
}

Expand All @@ -46,7 +46,7 @@ impl<'a> IoSliceMut<'a> {
}

#[inline]
pub fn as_mut_slice(&mut self) -> &mut [u8] {
pub const fn as_mut_slice(&mut self) -> &mut [u8] {
self.0
}
}
12 changes: 6 additions & 6 deletions library/std/src/sys/io/io_slice/wasi.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,12 +10,12 @@ pub struct IoSlice<'a> {

impl<'a> IoSlice<'a> {
#[inline]
pub fn new(buf: &'a [u8]) -> IoSlice<'a> {
pub const fn new(buf: &'a [u8]) -> IoSlice<'a> {
IoSlice { vec: wasi::Ciovec { buf: buf.as_ptr(), buf_len: buf.len() }, _p: PhantomData }
}

#[inline]
pub fn advance(&mut self, n: usize) {
pub const fn advance(&mut self, n: usize) {
if self.vec.buf_len < n {
panic!("advancing IoSlice beyond its length");
}
Expand All @@ -40,15 +40,15 @@ pub struct IoSliceMut<'a> {

impl<'a> IoSliceMut<'a> {
#[inline]
pub fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
pub const fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
IoSliceMut {
vec: wasi::Iovec { buf: buf.as_mut_ptr(), buf_len: buf.len() },
_p: PhantomData,
}
}

#[inline]
pub fn advance(&mut self, n: usize) {
pub const fn advance(&mut self, n: usize) {
if self.vec.buf_len < n {
panic!("advancing IoSlice beyond its length");
}
Expand All @@ -60,7 +60,7 @@ impl<'a> IoSliceMut<'a> {
}

#[inline]
pub fn as_slice(&self) -> &[u8] {
pub const fn as_slice(&self) -> &[u8] {
unsafe { slice::from_raw_parts(self.vec.buf as *const u8, self.vec.buf_len) }
}

Expand All @@ -70,7 +70,7 @@ impl<'a> IoSliceMut<'a> {
}

#[inline]
pub fn as_mut_slice(&mut self) -> &mut [u8] {
pub const fn as_mut_slice(&mut self) -> &mut [u8] {
unsafe { slice::from_raw_parts_mut(self.vec.buf as *mut u8, self.vec.buf_len) }
}
}
12 changes: 6 additions & 6 deletions library/std/src/sys/io/io_slice/windows.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,7 @@ pub struct IoSlice<'a> {

impl<'a> IoSlice<'a> {
#[inline]
pub fn new(buf: &'a [u8]) -> IoSlice<'a> {
pub const fn new(buf: &'a [u8]) -> IoSlice<'a> {
assert!(buf.len() <= u32::MAX as usize);
IoSlice {
vec: c::WSABUF { len: buf.len() as u32, buf: buf.as_ptr() as *mut u8 },
Expand All @@ -20,7 +20,7 @@ impl<'a> IoSlice<'a> {
}

#[inline]
pub fn advance(&mut self, n: usize) {
pub const fn advance(&mut self, n: usize) {
if (self.vec.len as usize) < n {
panic!("advancing IoSlice beyond its length");
}
Expand All @@ -45,7 +45,7 @@ pub struct IoSliceMut<'a> {

impl<'a> IoSliceMut<'a> {
#[inline]
pub fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
pub const fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
assert!(buf.len() <= u32::MAX as usize);
IoSliceMut {
vec: c::WSABUF { len: buf.len() as u32, buf: buf.as_mut_ptr() },
Expand All @@ -54,7 +54,7 @@ impl<'a> IoSliceMut<'a> {
}

#[inline]
pub fn advance(&mut self, n: usize) {
pub const fn advance(&mut self, n: usize) {
if (self.vec.len as usize) < n {
panic!("advancing IoSliceMut beyond its length");
}
Expand All @@ -66,7 +66,7 @@ impl<'a> IoSliceMut<'a> {
}

#[inline]
pub fn as_slice(&self) -> &[u8] {
pub const fn as_slice(&self) -> &[u8] {
unsafe { slice::from_raw_parts(self.vec.buf, self.vec.len as usize) }
}

Expand All @@ -76,7 +76,7 @@ impl<'a> IoSliceMut<'a> {
}

#[inline]
pub fn as_mut_slice(&mut self) -> &mut [u8] {
pub const fn as_mut_slice(&mut self) -> &mut [u8] {
unsafe { slice::from_raw_parts_mut(self.vec.buf, self.vec.len as usize) }
}
}
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