Enum ArrayLen 

pub enum ArrayLen {
    Fixed(u64),
    Unknown,
    Star,
    Variable(VlaId),
}

How many elements an array has, which is four different answers in C.

Variants

Fixed(u64)

int a[4]. The count of elements, not the size in bytes.

Unknown

int a[], an incomplete array type. It has an element type and no size, and it is completed by an initializer or by a later declaration.

Star

int a[*], a variably modified type in a prototype, where the size exists but is not available to the declaration that mentions it.

Variable(VlaId)

int a[n], a variable length array. The size expression stays in the AST, and the type carries only the identity of the one that made it, because two variable length arrays written with the same element type are still distinct types.

Trait Implementations

impl Clone for ArrayLen

fn clone(&self) -> ArrayLen

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ArrayLen

impl Debug for ArrayLen

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

Formats the value using the given formatter.

impl Eq for ArrayLen

impl Hash for ArrayLen

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ArrayLen

fn cmp(&self, other: &ArrayLen) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for ArrayLen

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for ArrayLen

fn partial_cmp(&self, other: &ArrayLen) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for ArrayLen