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Hole commands

Both VS Code and emacs support integration for 'hole commands'.

In VS Code, if you enter {! !}, a small light bulb symbol will appear, and clicking on it gives a drop down menu of available hole commands. Running one of these will replace the {! !} with whatever text that hole command provides.

instance_stub

(Requires import tactic.basic.)

Invoking the hole command Instance Stub on

instance : monad id :=
{! !}

produces

instance : monad id :=
{ map := _,
  map_const := _,
  pure := _,
  seq := _,
  seq_left := _,
  seq_right := _,
  bind := _ }

tidy

(Requires import tactic.tidy.)

Invoking the hole command tidy runs the tactic of the same name, replacing the hole with the tactic script tidy produces.