Struct CallFrame 

pub struct CallFrame {
    pub chunk_idx: usize,
    pub ip: usize,
    pub base: usize,
    pub locals: Vec<Value>,
}

one call frame: the function being run, the instruction pointer into its chunk, the base slot where this frame’s locals begin, and the frame’s local slots.

the frame owns its locals vec, which drops when the frame is popped on RETURN. 05-RESEARCH.md describes a per-frame bump arena freed wholesale on return; in v1 the heap’s free list already reclaims slots, so the frame owning its locals (dropped on return) is the whole of the “arena” – a distinct bump region is not required for correctness, and adding one would be dead weight against the free list. a richer arena stays a v2 idea.

derives Clone but not Debug – locals is a Vec<Value> and Value’s locked derive list omits Debug.

Fields

chunk_idx: usize

index into Program::chunks – which function this frame runs.

ip: usize

the instruction pointer: a byte offset into the chunk’s code.

base: usize

the value-stack index where this frame’s locals[0] conceptually sits. the call machinery (a later commit) uses it to unwind the stack on RETURN.

locals: Vec<Value>

this frame’s local slots, indexed by GET_LOCAL / SET_LOCAL operands. dropped when the frame is popped.

Trait Implementations

impl Clone for CallFrame

fn clone(&self) -> CallFrame

Returns a duplicate of the value.

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

Performs copy-assignment from source.