[PATCH v4 02/15] Document ^_^ regex in generate_from_strings.

[Giuliano Procida]

Following review of the change to simplify generation of symbol
whitelist regexes, this commit clarifies the purpose of the ^_^ regex
as one which will not match any string.

	* src/abg-regex.cc (generate_from_strings): Document ^_^
	regex.

Signed-off-by: Giuliano Procida <gprocida@google.com>
---
 src/abg-regex.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/abg-regex.cc b/src/abg-regex.cc
index cf0663a2..0451d111 100644
--- a/src/abg-regex.cc
+++ b/src/abg-regex.cc
@@ -69,6 +69,7 @@ std::string
 generate_from_strings(const std::vector<std::string>& strs)
 {
   if (strs.empty())
+    // This cute-looking regex does not match any string.
     return "^_^";
   std::ostringstream os;
   std::vector<std::string>::const_iterator i = strs.begin();
-- 
2.26.2.526.g744177e7f7-goog