use crate::obj::ObjPtr;
use crate::vm::name::Name;

#[derive(Debug, Clone)]
pub enum Inst {
    /// Pushes an object to the stack.
    Push(ObjPtr),

    /// Loads a local value in a name and pushes it to the stack.
    Load(Name),

    /// Pops the top item off of the stack and stores it in a name.
    Store(Name),

    /// Get an attribute from the top item of the stack.
    GetAttr(String),

    /// Pops the top item off of the stack, discarding it.
    Pop,

    /// Pops the top N function arguments off the stack, and attempt to call the
    /// next stack item.
    Call(usize),

    /// Exits the current function stack frame and returns control to the
    /// calling function.
    ///
    /// This will take the last value on top of the stack (the return value),
    /// resize the stack to its last size (pre-call), and push the return value
    /// back to the top of the stack.
    Return,
}