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#[derive(Clone, Copy, Debug)]
pub struct ConstantIdx(pub usize);
#[derive(Clone, Copy, Debug)]
pub struct StackIdx(pub usize);
#[derive(Clone, Copy, Debug)]
pub struct CodeIdx(pub usize);
#[derive(Clone, Copy, Debug)]
pub struct CodeOffset(pub usize);
#[derive(Debug)]
pub enum OpCode {
/// Push a constant onto the stack.
OpConstant(ConstantIdx),
// Literal pushes
OpNil,
OpTrue,
OpFalse,
/// Return from the current function.
OpReturn,
// Boolean & comparison operators
OpNot,
OpEqual,
OpGreater,
OpLess,
/// Unary negation
OpNegate,
// Arithmetic operators
OpAdd,
OpSubtract,
OpMultiply,
OpDivide,
// Built in operations
OpPrint,
OpPop,
// Variable management
OpDefineGlobal(ConstantIdx),
OpGetGlobal(ConstantIdx),
OpSetGlobal(ConstantIdx),
OpGetLocal(StackIdx),
OpSetLocal(StackIdx),
// Control flow
OpJumpPlaceholder(bool),
OpJump(CodeOffset),
OpJumpIfFalse(CodeOffset),
}
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