Fix exception specification and msvc warning push/pop.

Author: jzmaddock

include/boost/regex/pattern_except.hpp

@@ -52,7 +52,7 @@ class BOOST_REGEX_DECL regex_error : public std::runtime_error
 public:
    explicit regex_error(const std::string& s, regex_constants::error_type err = regex_constants::error_unknown, std::ptrdiff_t pos = 0);
    explicit regex_error(regex_constants::error_type err);
-   ~regex_error() BOOST_NOEXCEPT;
+   ~regex_error() BOOST_NOEXCEPT_OR_NOTHROW;
    regex_constants::error_type code()const
    { return m_error_code; }
    std::ptrdiff_t position()const

include/boost/regex/v4/perl_matcher.hpp

@@ -27,6 +27,13 @@
 
 #ifdef BOOST_MSVC
 #  pragma warning(push)
+#pragma warning(disable : 4251)
+#if BOOST_MSVC < 1700
+#     pragma warning(disable : 4231)
+#endif
+#  if BOOST_MSVC < 1600
+#     pragma warning(disable : 4660)
+#  endif
 #if BOOST_MSVC < 1910
 #pragma warning(disable:4800)
 #endif
@@ -362,17 +369,6 @@ struct recursion_info
 #  pragma warning(pop)
 #endif
 
-#ifdef BOOST_MSVC
-#pragma warning(push)
-#pragma warning(disable : 4251)
-#if BOOST_MSVC < 1700
-#     pragma warning(disable : 4231)
-#endif
-#  if BOOST_MSVC < 1600
-#     pragma warning(disable : 4660)
-#  endif
-#endif
-
 template <class BidiIterator, class Allocator, class traits>
 class perl_matcher
 {
@@ -601,13 +597,17 @@ class perl_matcher
    }
    perl_matcher(const perl_matcher& that)
       : m_result(that.m_result), re(that.re), traits_inst(that.traits_inst), rep_obj(0) {}
-};
 #ifdef BOOST_MSVC
 #  pragma warning(pop)
 #endif
+};
 
 } // namespace BOOST_REGEX_DETAIL_NS
 
+#ifdef BOOST_MSVC
+#  pragma warning(pop)
+#endif
+
 #ifdef BOOST_MSVC
 #pragma warning(push)
 #pragma warning(disable: 4103)
@@ -621,13 +621,6 @@ class perl_matcher
 
 } // namespace boost
 
-#ifdef BOOST_MSVC
-#  pragma warning(pop)
-#endif
-#ifdef BOOST_MSVC
-#  pragma warning(pop)
-#endif
-
 //
 // include the implementation of perl_matcher:
 //

src/regex.cpp

@@ -72,7 +72,7 @@ regex_error::regex_error(regex_constants::error_type err)
 {
 }
 
-regex_error::~regex_error() BOOST_NOEXCEPT
+regex_error::~regex_error() BOOST_NOEXCEPT_OR_NOTHROW
 {
 }