Enum FrameKind 

#[repr(u8)]
pub enum FrameKind {
    Lua = 0,
    Cont = 1,
}

The kind of an activation record, encoded into the lower 3 bits of a FrameMarker u64. Mirrors LuaJIT’s FRAME_* enum from lj_frame.h:18-22.

Lua corresponds to a Lua-level function activation; its PC field holds the next bytecode index to execute on resume. Cont corresponds to a native continuation frame (luna’s Cont variant of CallFrame). luna doesn’t currently emit separate FRAME_C / FRAME_VARG markers — those PUC distinctions are encoded elsewhere (e.g., Frame.from_c).

Variants

Lua = 0

A Lua function frame. The upper bits of the marker hold the frame’s PC (u32 bytecode index into the proto’s code).

Cont = 1

A native continuation frame (pcall, xpcall, metamethod continuation, etc.). The upper bits hold a frame delta to the previous frame’s base — not a PC. Continuations have no Lua PC.

Implementations

impl FrameKind

pub fn from_tag(tag: u8) -> Option<Self>

Decode a tag value (the lower 3 bits of a marker) back into a FrameKind. Returns None for invalid tag values; the caller is expected to treat that as a corrupt frame.

pub fn tag(self) -> u8

The 3-bit tag value used in marker encoding.

Trait Implementations

impl Clone for FrameKind

fn clone(&self) -> FrameKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FrameKind

impl Debug for FrameKind

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

Formats the value using the given formatter.

impl Eq for FrameKind

impl PartialEq for FrameKind

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for FrameKind