Function pre::std::const_pointer__impl__sub__ [−][src]
pub fn const_pointer__impl__sub__()
Expand description
A stub for the preconditions of the std::const_pointer<T>::sub
function.
What is this function?
This function was generated by an impl
block inside a extern_crate
attribute that looked like this:
ⓘ
impl< T > const_pointer < T > where T : ? Sized {
unsafe fn sub(self, count : usize) -> * const T;
/* 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 starting and the resulting pointer are in bounds of the same allocated object
- the computed offset, in bytes, does not overflow an
isize
- performing the subtraction does not result in overflow
To call the function you need to assure
that the preconditions hold:
ⓘ
#[forward(impl pre::std::const_pointer)]
#[assure(
"the starting and the resulting pointer are in bounds of the same allocated object",
reason = "<specify the reason why you can assure this here>"
)]
#[assure(
"the computed offset, in bytes, does not overflow an `isize`",
reason = "<specify the reason why you can assure this here>"
)]
#[assure(
"performing the subtraction does not result in overflow",
reason = "<specify the reason why you can assure this here>"
)]
x.sub(/* parameters omitted */);