Enum Growing 

pub enum Growing {
    Huge,
    Aligned,
    Probed,
}

What the frame could not do about a stack slot.

Variants

Huge

An object of a size the number a frame counts bytes in does not reach.

Aligned

A variable length array wanting more alignment than a call leaves the stack pointer with.

Rounding the stack pointer down again after the bytes have been taken would put it somewhere no constant reaches the rest of the frame from, so a frame like this needs a second base register held for the whole of the function. Nothing here holds one.

Probed

A variable length array in a function whose frame is meant to be touched a page at a time.

The pages a prologue takes are touched by the prologue, which knows how many there are when it is written. The pages a variable length array takes are not known until the declaration runs, so touching them is a loop next to the declaration, and there is no loop here yet.

Implementations

impl Growing

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

The rest of the sentence that starts with the slot.

Trait Implementations

impl Clone for Growing

fn clone(&self) -> Growing

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Growing

impl Debug for Growing

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

Formats the value using the given formatter.

impl Eq for Growing

impl PartialEq for Growing

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Growing