From c88f7b8dba3b52a44b6d12d223454e2d512c3c47 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timo=20R=C3=B6hling?= <timo.roehling@fkie.fraunhofer.de>
Date: Tue, 8 Nov 2022 22:11:15 +0100
Subject: [PATCH] Fix parsing of nested generator expressions

---
 src/catkin_lint/cmake.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/catkin_lint/cmake.py b/src/catkin_lint/cmake.py
index ce8c59e..aff85e7 100644
--- a/src/catkin_lint/cmake.py
+++ b/src/catkin_lint/cmake.py
@@ -74,7 +74,7 @@ def _resolve_vars(s, var, env_var):
     return s
 
 
-_find_genexp = re.compile(r'(?<!\\)\$<([a-z_0-9]+)(?::([^<>]+))>', re.IGNORECASE).search
+_find_genexp = re.compile(r'(?<!\\)\$<([a-z_0-9]*)(?::([^<>]+))>', re.IGNORECASE).search
 
 
 # TODO We just replace most generator expressions by empty strings.