Function pre::alloc::string::String__impl__from_raw_parts__ [−][src]
pub fn String__impl__from_raw_parts__()
Expand description
A stub for the preconditions of the alloc_lib::string::String::from_raw_parts
function.
What is this function?
This function was generated by an impl
block inside a extern_crate
attribute that looked like this:
ⓘ
impl String {
unsafe fn from_raw_parts(buf : * mut u8, length : usize, capacity : usize) ->
String;
/* other items omitted */
}
Preconditions on external functions inside of an impl
block are attached to empty functions like this one.
When the preconditions should be checked, a call to this function is inserted, which triggers checking the preconditions.
This function has preconditions
This function has the following preconditions generated by pre
attributes:
- the memory at
buf
was allocated with the standard library allocator with an alignment of exactly 1 length <= capacity
capacity
is the capacity thatbuf
was allocated withbuf
is not used after this call- the first
length
bytes atbuf
are valid UTF-8
To call the function you need to assure
that the preconditions hold:
ⓘ
#[forward(impl pre::alloc::string::String)]
#[assure(
"the memory at `buf` was allocated with the standard library allocator with an alignment of exactly 1",
reason = "<specify the reason why you can assure this here>"
)]
#[assure(
length <= capacity,
reason = "<specify the reason why you can assure this here>"
)]
#[assure(
"`capacity` is the capacity that `buf` was allocated with",
reason = "<specify the reason why you can assure this here>"
)]
#[assure(
"`buf` is not used after this call",
reason = "<specify the reason why you can assure this here>"
)]
#[assure(
"the first `length` bytes at `buf` are valid UTF-8",
reason = "<specify the reason why you can assure this here>"
)]
from_raw_parts(/* parameters omitted */);