改用更好的判断方式

Author: sumneko

script/core/completion/completion.lua

@@ -1588,18 +1588,12 @@ end
 local function findCall(state, position)
     local call
     guide.eachSourceContain(state.ast, position, function (src)
-        if src.type == 'call' then
-            if not call or call.start < src.start then
+        if src.type == 'call' and src.node.finish <= position then
+            if not call or call.start < src.start  then
                 call = src
             end
         end
     end)
-    if not call then
-        return nil
-    end
-    if call.node.finish > position then
-        return nil
-    end
     return call
 end
 

test/completion/common.lua

@@ -4489,3 +4489,48 @@ local m
 m:self(<??>):optional()
 ]]
 (nil)
+
+TEST [[
+---@enum(key) enum
+local t = {
+    a = 1,
+    b = 2,
+    c = 3,
+}
+
+---@class A
+local M
+
+---@return A
+function M.create()
+    return M
+end
+
+---@param optional enum
+---@return self
+function M:optional(optional)
+    return self
+end
+
+---@return A
+function M:self()
+    return self
+end
+
+
+M.create():optional(<??>):self()
+]]
+{
+    {
+        label = '"a"',
+        kind  = define.CompletionItemKind.EnumMember,
+    },
+    {
+        label = '"b"',
+        kind  = define.CompletionItemKind.EnumMember,
+    },
+    {
+        label = '"c"',
+        kind  = define.CompletionItemKind.EnumMember,
+    },
+}