1 files changed, 24 insertions, 0 deletions
diff --git a/lib/gitlab/ci/pipeline/expression/lexeme/parenthesis_open.rb b/lib/gitlab/ci/pipeline/expression/lexeme/parenthesis_open.rb
new file mode 100644
index 00000000000..924fe0663ab
--- /dev/null
+++ b/lib/gitlab/ci/pipeline/expression/lexeme/parenthesis_open.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    module Pipeline
+      module Expression
+        module Lexeme
+          class ParenthesisOpen < Lexeme::Operator
+            PATTERN = /\(/.freeze
+
+            def self.type
+              :parenthesis_open
+            end
+
+            def self.precedence
+              # Needs to be higher than `ParenthesisClose` and all other Lexemes
+              901
+            end
+          end
+        end
+      end
+    end
+  end
+end