From: Jonathan Wakely <jwakely@redhat.com>
Date: Sat, 4 Dec 2021 11:38:25 +0000 (+0000)
Subject: libstdc++: Initialize member in std::match_results [PR103549]
X-Git-Tag: basepoints/gcc-13~2521
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=87710ec7b213245ecb194b778e97ae3a6790394f;p=thirdparty%2Fgcc.git

libstdc++: Initialize member in std::match_results [PR103549]

This fixes a -Wuninitialized warning for std::cmatch m1, m2; m1=m2;

Also name the template parameters in the forward declaration, to get rid
of the <template-parameter-1-1> noise in diagnostics.

libstdc++-v3/ChangeLog:

	PR libstdc++/103549
	* include/bits/regex.h (match_results): Give names to template
	parameters in first declaration.
	(match_results::_M_begin): Add default member-initializer.
---

diff --git a/libstdc++-v3/include/bits/regex.h b/libstdc++-v3/include/bits/regex.h
index 785edc718009..52dcd7f86ae3 100644
--- a/libstdc++-v3/include/bits/regex.h
+++ b/libstdc++-v3/include/bits/regex.h
@@ -35,7 +35,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
   template<typename, typename>
     class basic_regex;
 
-  template<typename, typename>
+  template<typename _Bi_iter, typename _Alloc>
     class match_results;
 
 _GLIBCXX_END_NAMESPACE_CXX11
@@ -2109,7 +2109,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
       _M_suffix()
       { return _Unchecked::operator[](_Unchecked::size() - 1); }
 
-      _Bi_iter _M_begin;
+      _Bi_iter _M_begin {};
       /// @endcond
     };