How do I set a special char as a mapleader in Vim?

Question

Failed attempts

With quotes

let mapleader = "<Delete>"

Without quotes

let mapleader = <Delete>

E15: Invalid expression: <Delete>

Other keys

let mapleader = "<Escape>"

let mapleader = "<Insert>"

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Baseline

Using a comma works.

let mapleader = ","

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What I'm really trying to do

I'm trying to set Caps Lock as a mapleader in Vim. Using xmodmap, I can clear Caps Lock's functionality and assign it to a new key. I'd like to assign it to Insert, Delete, or Esc, and then assign one of those as a mapleader in Vim.

Answer 1

Use an escape character

let mapleader = "\<Delete>"

let mapleader = "\<Esc>"

let mapleader = "\<Insert>"

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More info: http://vimdoc.sourceforge.net/htmldoc/eval.html#expr-quote

Credit: https://stackoverflow.com/a/9578616/3822261