From 2035a495332829e00fb4b18d93d243fc4b2e90ac Mon Sep 17 00:00:00 2001
From: John Maddock <john@johnmaddock.co.uk>
Date: Mon, 1 Apr 2002 11:46:04 +0000
Subject: [PATCH] Added support for regex_fwd.hpp

[SVN r13333]
---
 include/boost/cregex.hpp    |  2 +-
 include/boost/regex.hpp     | 10 ++++--
 include/boost/regex_fwd.hpp | 69 +++++++++++++++++++++++++++++++++++++
 3 files changed, 78 insertions(+), 3 deletions(-)
 create mode 100644 include/boost/regex_fwd.hpp

diff --git a/include/boost/cregex.hpp b/include/boost/cregex.hpp
index 3a6f4502..decfd1f4 100644
--- a/include/boost/cregex.hpp
+++ b/include/boost/cregex.hpp
@@ -16,7 +16,7 @@
  /*
   *   LOCATION:    see http://www.boost.org for most recent version.
   *   FILE         cregex.cpp
-  *   VERSION      3.12
+  *   VERSION      see <boost/version.hpp>
   *   DESCRIPTION: Declares POSIX API functions
   *                + boost::RegEx high level wrapper.
   */
diff --git a/include/boost/regex.hpp b/include/boost/regex.hpp
index 6d00503b..e9ec443a 100644
--- a/include/boost/regex.hpp
+++ b/include/boost/regex.hpp
@@ -16,7 +16,7 @@
  /*
   *   LOCATION:    see http://www.boost.org for most recent version.
   *   FILE         regex.cpp
-  *   VERSION      3.12
+  *   VERSION      see <boost/version.hpp>
   *   DESCRIPTION: Declares boost::reg_expression<> and associated
   *                functions and classes. This header is the main
   *                entry point for the template regex code.
@@ -41,6 +41,7 @@
 #include <new>
 #include <boost/regex/config.hpp>
 #include <cstring>
+#include <boost/regex_fwd.hpp>
 #include <boost/regex/detail/regex_stack.hpp>
 #include <boost/regex/detail/regex_raw_buffer.hpp>
 #include <boost/regex/detail/regex_kmp.hpp>
@@ -458,7 +459,11 @@ class match_results;
 namespace{
 #endif
 
+#ifdef BOOST_REGEX_NO_FWD
 template <class charT, class traits = regex_traits<charT>, class Allocator = BOOST_DEFAULT_ALLOCATOR(charT) >
+#else
+template <class charT, class traits, class Allocator >
+#endif
 class reg_expression : public regbase
 {
    typedef typename traits::size_type traits_size_type;
@@ -1529,11 +1534,12 @@ iterator BOOST_REGEX_CALL re_is_set_member(iterator next,
 #include <boost/regex/detail/regex_compile.hpp>
 
 namespace boost{
-
+#ifdef BOOST_REGEX_NO_FWD
 typedef reg_expression<char, regex_traits<char>, BOOST_DEFAULT_ALLOCATOR(char)> regex;
 #ifndef BOOST_NO_WREGEX
 typedef reg_expression<wchar_t, regex_traits<wchar_t>, BOOST_DEFAULT_ALLOCATOR(wchar_t)> wregex;
 #endif
+#endif
 
 typedef match_results<const char*> cmatch;
 typedef match_results<std::string::const_iterator> smatch;
diff --git a/include/boost/regex_fwd.hpp b/include/boost/regex_fwd.hpp
new file mode 100644
index 00000000..7061f4c4
--- /dev/null
+++ b/include/boost/regex_fwd.hpp
@@ -0,0 +1,69 @@
+/*
+ *
+ * Copyright (c) 1998-2000
+ * Dr John Maddock
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Dr John Maddock makes no representations
+ * about the suitability of this software for any purpose.
+ * It is provided "as is" without express or implied warranty.
+ *
+ */
+
+ /*
+  *   LOCATION:    see http://www.boost.org for most recent version.
+  *   FILE         regex_fwd.cpp
+  *   VERSION      see <boost/version.hpp>
+  *   DESCRIPTION: Forward declares boost::reg_expression<> and
+  *                associated typedefs.
+  */
+
+#ifndef BOOST_REGEX_FWD_HPP
+#define BOOST_REGEX_FWD_HPP
+
+#include <boost/config.hpp>
+#include <boost/detail/allocator.hpp>
+
+//
+// define BOOST_REGEX_NO_FWD if this
+// header doesn't work!
+//
+#ifdef __CYGWIN__
+#  define BOOST_REGEX_NO_FWD
+#endif
+
+#ifdef BOOST_REGEX_NO_FWD
+#  ifndef BOOST_RE_REGEX_HPP
+#     include <boost/regex.hpp>
+#  endif
+#else
+
+//
+// If there isn't good enough wide character support then there will
+// be no wide character regular expressions:
+//
+#if (defined(BOOST_NO_CWCHAR) || defined(BOOST_NO_CWCTYPE) || defined(BOOST_NO_STD_WSTRING)) && !defined(BOOST_NO_WREGEX)
+#  define BOOST_NO_WREGEX
+#endif
+
+namespace boost{
+
+template <class charT>
+class regex_traits;
+
+template <class charT, class traits = regex_traits<charT>, class Allocator = BOOST_DEFAULT_ALLOCATOR(charT) >
+class reg_expression;
+
+typedef reg_expression<char, regex_traits<char>, BOOST_DEFAULT_ALLOCATOR(char)> regex;
+#ifndef BOOST_NO_WREGEX
+typedef reg_expression<wchar_t, regex_traits<wchar_t>, BOOST_DEFAULT_ALLOCATOR(wchar_t)> wregex;
+#endif
+
+} // namespace boost
+
+#endif  // BOOST_REGEX_NO_FWD
+
+#endif
\ No newline at end of file