A confusion about shortcut key of youcompleteme for vim

Question

all. I am trying to use youcompleteme for code completing in vim. Generally, it works well except that when i need to jump between source files. First. I use the subcommand

:YcmCompleter GoToDefinition

it can find the definition. BUT it seems so verbose. Then I want to map this subcommand into some shortcut key according to the YCM's instruction:

nnoremap <leader>gl :YcmCompleter GoToDeclaration<CR>
nnoremap <leader>gf :YcmCompleter GoToDefinition<CR>
nnoremap <leader>gg :YcmCompleter GoToDefinitionElseDeclaration<CR>

I am a little confused. what is short cut key? l or gl ?

Answer 1

When you create a mapping with <leader>, <leader> is replaced by whatever is in your "mapleader" variable (by default \).

If you have this in your vimrc:

let mapleader=","
nnoremap <leader>gl :YcmCompleter GoToDeclaration<CR>

It acts the same as:

nnoremap ,gl :YcmCompleter GoToDeclaration<CR>

Thus you could run the YcmCompleter GoToDeclaration command by pressing ,gl