How can I be sure a digraph is not defined by Vim?

Question

I am trying to enter a latin cross (✝, Unicode 271d) into a document. I can't find a pre-defined digraph for this. I am able to enter such a character with <ctrl-v>u271d or I can define a new digraph in my .vimrc like so: digraph \|- 10013.

But before I'd do that I'd like to know if there is really no pre-defined digraph for the latin cross. How can I verify this?

Answer 1

You can use the :digraphs command to get a list of all defined digraphs. This isn't very easy to search, but we can use :redir to store it to a file:

:redir all_digraphs
:digraphs
:redir END
:e all_digraphs

And we can now search the file:

/<C-v>u271d 

which gives us:

E385: search hit BOTTOM without match for: ✝

which confirms that this characters isn't a pre-defined digraph.

Answer 2

There is no such digraph defined by default. You can review available digraphs at :help digraph-table. The listing includes hex and decimal values as well as the name of the character, so you can easily search for an entry, for instance with :help digraph-table|/0x271d or :help digraph-table|/CROSS. The closest ones I see by value are

✓   OK  2713    10003   CHECK MARK
✗   XX  2717    10007   BALLOT X
✠   -X  2720    10016   MALTESE CROSS

and I suppose the closest one visually is

†   /-  2020    8224    DAGGER

Answer 3

I made the unicode plugin that helps with finding digraphs. You can use the command :Digraphs cross to search for a digraph whose name contains cross. Or when on the char, issue the command :Unicodename and it will output the digraph for that char. There are other similar commands as well, so check the help.