feat(struct_tags): add range support (#117)

* feat(struct_tags): add range support

* refactor: use `start`, and `end_` naming for ranges

plugin/gopher.lua

@@ -11,10 +11,13 @@ end
 ---@param name string
 ---@param fn fun(args: table)
 ---@param nargs? number|"*"|"?"
+---@param range? boolean
 ---@private
-local function cmd(name, fn, nargs)
-  nargs = nargs or 0
-  vim.api.nvim_create_user_command(name, fn, { nargs = nargs })
+local function cmd(name, fn, nargs, range)
+  vim.api.nvim_create_user_command(name, fn, {
+    nargs = nargs or 0,
+    range = range or false,
+  })
 end
 
 cmd("GopherLog", function()
@@ -44,12 +47,24 @@ end)
 
 -- :GoTag
 cmd("GoTagAdd", function(opts)
-  require("gopher").tags.add(unpack(opts.fargs))
-end, "*")
+  require("gopher").tags.add {
+    tags = opts.fargs,
+    range = (opts.count ~= -1) and {
+      start = opts.line1,
+      end_ = opts.line2,
+    } or nil,
+  }
+end, "*", true)
 
 cmd("GoTagRm", function(opts)
-  require("gopher").tags.rm(unpack(opts.fargs))
-end, "*")
+  require("gopher").tags.rm {
+    tags = opts.fargs,
+    range = (opts.count ~= -1) and {
+      start = opts.line1,
+      end_ = opts.line2,
+    } or nil,
+  }
+end, "*", true)
 
 cmd("GoTagClear", function()
   require("gopher").tags.clear()