Add lang/viml layer

autoload/SpaceVim/default.vim

@@ -362,6 +362,7 @@ function! SpaceVim#default#SetMappings() abort
     call SpaceVim#mapping#def('nnoremap <silent>', '<Leader>sg', ':vsplit<CR>:wincmd p<CR>:e#<CR>',
                 \'Open previous buffer in vsplit window' , 'vsplit|wincmd p|e#')
     call SpaceVim#mapping#def('nnoremap <silent>', 'gf', ':call zvim#gf()<CR>', 'Jump to a file under cursor', '')
+    call SpaceVim#mapping#def('nnoremap <silent>', 'gd', ':call SpaceVim#mapping#gd()<CR>', 'Goto declaration', '')
 endfunction
 
 fu! s:tobur(num) abort

autoload/SpaceVim/layers/lang/vim.vim

@@ -0,0 +1,10 @@
+function! SpaceVim#layers#lang#vim#plugins() abort
+    let plugins = []
+    call add(plugins,['tweekmonster/exception.vim'])
+    call add(plugins,['mhinz/vim-lookup'])
+    return plugins
+endfunction
+
+function! SpaceVim#layers#lang#vim#config() abort
+    call SpaceVim#mapping#gd#add('vim','lookup#lookup')
+endfunction

autoload/SpaceVim/mapping.vim

@@ -56,3 +56,11 @@ function! SpaceVim#mapping#enter() abort
         return "\<Enter>"
     endif
 endfunction
+
+function! SpaceVim#mapping#gd() abort
+    if !empty(SpaceVim#mapping#gd#get())
+        call call(SpaceVim#mapping#gd#get(), [])
+    else
+        normal! gd
+    endif
+endfunction

autoload/SpaceVim/mapping/gd.vim

@@ -0,0 +1,8 @@
+let s:gd = {}
+function! SpaceVim#mapping#gd#add(ft, func) abort
+    call extend(s:gd,{a:ft : a:func})
+endfunction
+
+function! SpaceVim#mapping#gd#get() abort
+    return get(s:gd, &filetype, '')
+endfunction