remove signal generator

.ccls-cache/@@mnt@raid@projects@dsp@harmonica@harmonica/@usr@include@c++@15.2.1@bits@stringfwd.h

@@ -0,0 +1,102 @@
+// <string> Forward declarations -*- C++ -*-
+
+// Copyright (C) 2001-2025 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file bits/stringfwd.h
+ *  This is an internal header file, included by other library headers.
+ *  Do not attempt to use it directly. @headername{string}
+ */
+
+//
+// ISO C++ 14882: 21 Strings library
+//
+
+#ifndef _STRINGFWD_H
+#define _STRINGFWD_H 1
+
+#ifdef _GLIBCXX_SYSHDR
+#pragma GCC system_header
+#endif
+
+#include <bits/c++config.h>
+#include <bits/memoryfwd.h>
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+  /**
+   *  @defgroup strings Strings
+   *
+   *  @{
+  */
+
+  template<class _CharT>
+    struct char_traits;
+
+  template<> struct char_traits<char>;
+
+  template<> struct char_traits<wchar_t>;
+
+#ifdef _GLIBCXX_USE_CHAR8_T
+  template<> struct char_traits<char8_t>;
+#endif
+
+#if __cplusplus >= 201103L
+  template<> struct char_traits<char16_t>;
+  template<> struct char_traits<char32_t>;
+#endif
+
+_GLIBCXX_BEGIN_NAMESPACE_CXX11
+
+  template<typename _CharT, typename _Traits = char_traits<_CharT>,
+           typename _Alloc = allocator<_CharT> >
+    class basic_string;
+
+_GLIBCXX_END_NAMESPACE_CXX11
+
+  /// A string of @c char
+  typedef basic_string<char>    string;
+
+  /// A string of @c wchar_t
+  typedef basic_string<wchar_t> wstring;
+
+#ifdef _GLIBCXX_USE_CHAR8_T
+  /// A string of @c char8_t
+  typedef basic_string<char8_t> u8string;
+#endif
+
+#if __cplusplus >= 201103L
+  /// A string of @c char16_t
+  typedef basic_string<char16_t> u16string;
+
+  /// A string of @c char32_t
+  typedef basic_string<char32_t> u32string;
+#endif
+
+  /** @}  */
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace std
+
+#endif	// _STRINGFWD_H