Enum Handler 

pub enum Handler {
    Native(CommandFn),
    Action(String),
}

How a command executes when invoked.

• Handler::Native wraps a compiled-in Rust fn — the built-in command set (save, quit, …).
• Handler::Action carries a dotted action symbol (e.g. "buffer.write-all", "picker.files") authored via a Tatara-Lisp (defcmd …) form and resolved at run time by [run_action]. This is what lets defcmd register a real, invokable command without a compiled handler.

A future Lisp(Thunk) variant will carry a tatara-lisp-eval closure for fully-programmable commands — the imperative tier of the two-tier programmability model. Keeping the handler an enum (not a bare fn) is what makes that extension a one-variant add.

Variants

Native(CommandFn)

Compiled-in Rust handler.

Action(String)

Dotted action symbol resolved at run time (Lisp defcmd).

Trait Implementations

impl Clone for Handler

fn clone(&self) -> Handler

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Handler

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

Formats the value using the given formatter.