Avoid printing notation in Coq with Proof General

Question

In lecture 6 of the DeepSpec 2018, the lecturer Checks the definition of

string_dec

obtaining:

string_dec
     : forall s1 s2 : string, {s1 = s2} + {s1 <> s2}

Then he goes on to see the definition of +, but before, he disables in CoqIde the printing of notation. So that sumbool is printed. This last symbol can be checked.

How can I do the same thing with Proof General?

Answer 1

You can use the menu, Coq > OPTIONS > Set Printing All.

You can also issue the command directly, typing Set Printing All. and evaluating it in your buffer before running the Check command. This also gives you access to Unset Printing Notations to only disable printing notations (which is something you can do with the menu in CoqIDE). When you're done you can just delete this command, which will undo its effect.

Finally, you can also directly use Coq > OTHER QUERIES > Check (show all) on string_dec.