Struct FrameStateSlotBuilder 

pub struct FrameStateSlotBuilder { /* private fields */ }

Builder for a stackslot descriptor.

Implementations

impl FrameStateSlotBuilder

pub fn new(func_key: FuncKey, pointer_size: u32) -> FrameStateSlotBuilder

Create a new state-slot builder.

pub fn add_local(&mut self, ty: FrameValType) -> FrameStateSlotOffset

Add a local to the state-slot.

Locals must be added in local index order, and must be added before any stack shapes are defined. The offset in the state slot is returned.

pub fn local_offset(&self, local: u32) -> FrameStateSlotOffset

Get a local’s offset in the state-slot.

pub fn push_stack( &mut self, parent: Option<FrameStackShape>, ty: FrameValType, ) -> (FrameStackShape, FrameStateSlotOffset)

Push a stack entry. Returns the stack-shape descriptor and the offset at which to write the pushed value.

pub fn stack_last_offset(&self, shape: FrameStackShape) -> FrameStateSlotOffset

Get the offset for the top slot in a given stack shape.

pub fn serialize(&self) -> Vec<u8>

Serialize the frame-slot descriptor so it can be included as metadata.

pub fn size(&self) -> u32

The total size required for all locals/stack storage.