Struct Emitter 

pub struct Emitter { /* private fields */ }

Builder for constructing bytecode chunks.

Implementations

impl Emitter

pub fn new() -> Self

pub fn emit_op(&mut self, op: Op)

pub fn emit_u16(&mut self, val: u16)

pub fn emit_u32(&mut self, val: u32)

pub fn emit_i32(&mut self, val: i32)

pub fn add_const(&mut self, val: Value) -> u16

Add a constant to the pool, deduplicating by value equality. Returns the u16 index into the constant pool.

pub fn emit_const(&mut self, val: Value)

Emit Op::Const followed by the u16 constant index.

pub fn emit_span(&mut self, span: Span)

Record a source span at the current PC position.

pub fn current_pc(&self) -> u32

Current code length as u32.

pub fn emit_jump(&mut self, op: Op) -> u32

Emit a jump instruction with a placeholder i32 offset. Returns the PC of the placeholder for later backpatching.

pub fn patch_jump(&mut self, placeholder_pc: u32)

Backpatch the i32 at placeholder_pc with the relative offset from the end of the jump instruction to the current PC.

pub fn into_chunk(self) -> Chunk

Consume the emitter and return the finished Chunk.

Trait Implementations

impl Default for Emitter

fn default() -> Self

Returns the “default value” for a type.