diff -dur a/basic_regex.hpp b/basic_regex.hpp
--- a/basic_regex.hpp	2012-01-02 18:34:53.153010751 +0100
+++ b/basic_regex.hpp	2012-01-02 18:34:34.343010598 +0100
@@ -243,11 +243,11 @@
    // begin, end:
    const_iterator BOOST_REGEX_CALL begin()const
    { 
-      return (!this->m_status ? 0 : this->m_expression); 
+      return (this->m_status ? 0 : this->m_expression); 
    }
    const_iterator BOOST_REGEX_CALL end()const
    { 
-      return (!this->m_status ? 0 : this->m_expression + this->m_expression_len); 
+      return (this->m_status ? 0 : this->m_expression + this->m_expression_len); 
    }
    flag_type BOOST_REGEX_CALL flags()const
    {