Function pre::alloc::string::String__impl__as_mut_vec__

pub fn String__impl__as_mut_vec__()

A stub for the preconditions of the alloc_lib::string::String::as_mut_vec 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 as_mut_vec(& mut self) -> & mut Vec < u8 >;
    /* 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 precondition generated by the pre attribute:

• the content of the Vec is valid UTF-8 at the time the reference is dropped

To call the function you need to assure that the precondition holds:

#[forward(impl pre::alloc::string::String)]
#[assure(
    "the content of the `Vec` is valid UTF-8 at the time the reference is dropped",
    reason = "<specify the reason why you can assure this here>"
)]
x.as_mut_vec(/* parameters omitted */);