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Add vec::unpack_slice, expose str::unpack_slice.

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This commit is contained in:
Graydon Hoare 2012-04-20 17:37:17 -07:00
parent 14d0509691
commit 43061f3969
2 changed files with 11 additions and 0 deletions
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1
src/libcore/str.rs
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@ -20,6 +20,7 @@ export
as_bytes,
as_buf,
as_c_str,
unpack_slice,
// Adding things to and removing things from a string
push_char,

10
src/libcore/vec.rs
View File

@ -71,6 +71,7 @@ export permute;
export windowed;
export as_buf;
export as_mut_buf;
export unpack_slice;
export unsafe;
export u8;
export extensions;
@ -954,6 +955,15 @@ fn as_mut_buf<E,T>(v: [mut E], f: fn(*mut E) -> T) -> T unsafe {
let buf = unsafe::to_ptr(v) as *mut E; f(buf)
}
#[doc = "
Work with the buffer and length of a slice.
"]
fn unpack_slice<T,U>(s: [const T]/&, f: fn(*T, uint) -> U) -> U unsafe {
let v : *(*T,uint) = ::unsafe::reinterpret_cast(ptr::addr_of(s));
let (buf,len) = *v;
f(buf, len / sys::size_of::<T>())
}
#[doc = "Extension methods for vectors"]
impl extensions<T> for [const T] {
#[doc = "