sync PR 162 and PR 163 to v4

include/boost/regex/v4/pattern_except.hpp

@@ -88,7 +88,8 @@ typedef regex_error bad_expression;
 
 namespace BOOST_REGEX_DETAIL_NS{
 
-inline void BOOST_REGEX_CALL raise_runtime_error(const std::runtime_error& ex)
+template <class E>
+inline void raise_runtime_error(const E& ex)
 {
 #ifndef BOOST_REGEX_STANDALONE
    ::boost::throw_exception(ex);
@@ -101,7 +102,7 @@ template <class traits>
 void raise_error(const traits& t, regex_constants::error_type code)
 {
    (void)t;  // warning suppression
-   std::runtime_error e(t.error_string(code));
+   regex_error e(t.error_string(code), code, 0);
    ::boost::BOOST_REGEX_DETAIL_NS::raise_runtime_error(e);
 }