Enum Missing 

pub enum Missing {
    OnStack,
    InVector,
    Width,
}

Why a parameter could not be brought in.

Variants

OnStack

It arrives on the stack, which is somewhere nothing reads from yet: the offset is a distance into a frame, and a frame is not worked out until after allocation.

InVector

It arrives in a vector register. Every rule in the set is about an integer, so a value in one has nothing downstream that could use it.

Width

It is a width no pseudo covers, which is anything a machine register does not hold.

Implementations

impl Missing

pub fn why(self) -> &'static str

What it says when a function could not be compiled because of it.

Worded so that it reads the same about a value arriving and a value being passed, since the two are the same fact seen from the two ends of one call.

Trait Implementations

impl Clone for Missing

fn clone(&self) -> Missing

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Missing

impl Debug for Missing

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Missing

impl PartialEq for Missing

fn eq(&self, other: &Missing) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Missing