From 3aea5e26d71d00c160033bd86451b11a69424b9d Mon Sep 17 00:00:00 2001
From: Lukasz Samson <lukaszsamson@gmail.com>
Date: Fri, 7 Jul 2023 21:49:27 +0200
Subject: [PATCH] do not complete @@

---
 lib/elixir_sense/core/metadata_builder.ex | 55 ++++++++++++-----------
 test/elixir_sense/suggestions_test.exs    | 16 +++++++
 2 files changed, 46 insertions(+), 25 deletions(-)

diff --git a/lib/elixir_sense/core/metadata_builder.ex b/lib/elixir_sense/core/metadata_builder.ex
index 2ea8abf1..683bb6e4 100644
--- a/lib/elixir_sense/core/metadata_builder.ex
+++ b/lib/elixir_sense/core/metadata_builder.ex
@@ -733,37 +733,42 @@ defmodule ElixirSense.Core.MetadataBuilder do
     )
   end
 
-  defp pre({:@, meta_attr, [{name, meta, params}]}, state) do
-    line = Keyword.fetch!(meta_attr, :line)
-    column = Keyword.fetch!(meta_attr, :column)
+  defp pre({:@, meta_attr, [{name, meta, params}]}, state) when is_atom(name) do
+    if String.match?(Atom.to_string(name), ~r/^[a-zA-Z_].*/) do
+      line = Keyword.fetch!(meta_attr, :line)
+      column = Keyword.fetch!(meta_attr, :column)
 
-    binding =
-      case List.wrap(params) do
-        [] ->
-          {nil, false}
+      binding =
+        case List.wrap(params) do
+          [] ->
+            {nil, false}
 
-        [param] ->
-          {get_binding_type(state, param), true}
+          [param] ->
+            {get_binding_type(state, param), true}
 
-        _ ->
-          :error
-      end
+          _ ->
+            :error
+        end
 
-    case binding do
-      {type, is_definition} ->
-        state =
-          add_moduledoc_positions(
-            state,
-            [line: line, column: column],
-            [{name, meta, params}],
-            line
-          )
+      case binding do
+        {type, is_definition} ->
+          state =
+            add_moduledoc_positions(
+              state,
+              [line: line, column: column],
+              [{name, meta, params}],
+              line
+            )
 
-        new_ast = {:@, meta_attr, [{name, add_no_call(meta), params}]}
-        pre_module_attribute(new_ast, state, {line, column}, name, type, is_definition)
+          new_ast = {:@, meta_attr, [{name, add_no_call(meta), params}]}
+          pre_module_attribute(new_ast, state, {line, column}, name, type, is_definition)
 
-      _ ->
-        {[], state}
+        _ ->
+          {[], state}
+      end
+    else
+      # most likely not an attribute
+      {[], state}
     end
   end
 
diff --git a/test/elixir_sense/suggestions_test.exs b/test/elixir_sense/suggestions_test.exs
index 70533225..4ba82522 100644
--- a/test/elixir_sense/suggestions_test.exs
+++ b/test/elixir_sense/suggestions_test.exs
@@ -1628,6 +1628,22 @@ defmodule ElixirSense.SuggestionsTest do
     assert Enum.any?(list, &(&1.name == "@spec"))
   end
 
+  test "do not suggest @@" do
+    buffer = """
+    defmodule MyModule do
+      @
+      @my_attribute1 true
+    end
+    """
+
+    list =
+      ElixirSense.suggestions(buffer, 2, 4)
+      |> Enum.filter(fn s -> s.type == :attribute end)
+      |> Enum.map(fn %{name: name} -> name end)
+
+    refute "@@" in list
+  end
+
   test "lists doc snippets in module body" do
     buffer = """
     defmodule MyModule do