update

lua/plugs/nvim-lspconfig.lua

@@ -134,12 +134,32 @@ return {
         'hrsh7th/cmp-buffer',   -- { name = 'buffer' },
         'hrsh7th/cmp-path',     -- { name = 'path' }
         'hrsh7th/cmp-cmdline',  -- { name = 'cmdline' }
-        'hrsh7th/vim-vsnip',
+        {
+          'hrsh7th/vim-vsnip',
+          config = function()
+            -- vim.cmd[[
+            --   let g:vsnip_snippet_dir = expand('~/.config/nvim/snippets')
+            -- ]]
+            G.g.vsnip_snippet_dir = G.fn.stdpath("config") .. "/snippets"
+            -- G.g.vsnip_filetypes = {
+            --   "code-snippets"
+            -- }
+          end
+        },
         'hrsh7th/cmp-vsnip',
         'onsails/lspkind-nvim',
       },
       config = function()
-        G.g.vsnip_snippet_dir = G.fn.stdpath("config") .. "/sinppets/acm/"
+        -- vim.cmd[[
+        --     let g:vsnip_snippet_dir = expand('~/.vsnip')
+        --       Specify user snippet directory.
+        --       Also as buffer-local variable:    `b:vsnip_snippet_dir`
+
+        --     let g:vsnip_snippet_dirs = []
+
+        -- ]]
+
+
         local has_words_before = function()
           unpack = unpack or table.unpack
           local line, col = unpack(G.api.nvim_win_get_cursor(0))
@@ -158,7 +178,7 @@ return {
           },
           sources = cmp.config.sources({
               { name = 'nvim_lsp' },
-              { name = 'vnsip' },
+              { name = 'vsnip' },
             },
             { name = 'buffer' },
             { name = 'path' }

snippets/lua.json

@@ -0,0 +1,32 @@
+{
+  "Class_Array_tree": {
+    "prefix": "Class_Array_tree",
+    "body": [
+      "",
+      "template <class T>",
+      "class Array_tree {",
+      " public:",
+      "  Array_tree() {}",
+      "  Array_tree(int n) { this->n = n, tree = vector<T>(n + 1); }",
+      "  void add(int id, T key) {",
+      "    for (int i = id; i <= n; i += lowbit(i)) tree[i] += key;",
+      "  }",
+      "",
+      "  T get_sum(int id) {",
+      "    T sum = 0;",
+      "    for (int i = id; i; i -= lowbit(i)) sum += tree[i];",
+      "    return sum;",
+      "  }",
+      "",
+      "  T get_sum(int l, int r) { return get_sum(r) - get_sum(l - 1); }",
+      "",
+      " private:",
+      "  int n;",
+      "  vector<T> tree;",
+      "  int lowbit(int x) { return x & -x; }",
+      "};",
+      ""
+    ]
+  }
+}
+}