Struct VariableLayout 

pub struct VariableLayout {
    pub size: Extent,
    pub offsets: Vec<Option<Extent>>,
}

What is left of a record’s layout when it depends on something the program computes.

Present on exactly the records that have a variable length array somewhere in their members, which C calls variably modified and which may only be declared inside a function. The alignment is not in here because an alignment never varies: it is decided by the members rather than by where they land, so it is in the Layout beside this with a size of zero.

Fields

size: Extent

How large the record is, padded to its alignment the way a fixed size one is.

offsets: Vec<Option<Extent>>

Where each member sits, in bytes, one entry per member and in the same order.

Absent for a member that sits where the number in its Field says, which is every member in front of the first one of no fixed size and is the common case even here.

Trait Implementations

impl Clone for VariableLayout

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VariableLayout

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

Formats the value using the given formatter.

impl Eq for VariableLayout

impl PartialEq for VariableLayout

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for VariableLayout