Struct TypeLayout 

pub struct TypeLayout {
    pub type_: NodeId,
    pub align: u8,
    pub extent: Extent,
    pub needs_dheader: bool,
    pub needs_sentinel: bool,
    pub discriminator: Option<MemberHeader>,
    pub members: Vec<MemberPlan>,
}

A type’s wire layout under one key.

Fields

type_: NodeId

The type this plan is for.

align: u8

The alignment the whole type requires.

extent: Extent

How much space it takes.

needs_dheader: bool

Whether a DHEADER precedes the members. XCDR2 only.

needs_sentinel: bool

Whether a PID_LIST_END sentinel terminates the parameter list. PL_CDR1 only; XTypes 1.3 §7.4.1.2.4.

discriminator: Option<MemberHeader>

How a @mutable union’s discriminator is framed, and None everywhere else.

Rules (27) and (28) frame a @mutable union’s discriminator exactly like a member — an MMEMBER at member id 0 — but a discriminator is not a member node, so there is nothing for a MemberPlan to name. It gets a field of its own rather than a synthetic MemberPlan, because a synthetic node id is a thing every consumer would have to know not to look up.

members: Vec<MemberPlan>

The members, in wire order.

For a union these are the case members, one per case, and only the selected one is written. Populated only for a @mutable union: rules (26) and (30) give a union of any other extensibility no per-member framing to plan.

Implementations

impl TypeLayout

pub fn scalar(type_: NodeId, align: u8, extent: Extent) -> Self

A plan for a type with no members.

pub fn member(&self, node: NodeId) -> Option<&MemberPlan>

The plan for one member, by its identity.

Trait Implementations

impl Clone for TypeLayout

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 TypeLayout

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

Formats the value using the given formatter.

impl Eq for TypeLayout

impl PartialEq for TypeLayout

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TypeLayout