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Fix unchecked lower bound warning in get_default_error_string. #263

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Fix unchecked lower bound warning in get_default_error_string. #263

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3 changes: 2 additions & 1 deletion include/boost/regex/v5/regex_traits_defaults.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -148,7 +148,8 @@ inline const char* get_default_error_string(regex_constants::error_type n)
"Unknown error.", /* REG_E_UNKNOWN 21 error_unknown */
};

return (n > ::boost::regex_constants::error_unknown) ? s_default_error_messages[::boost::regex_constants::error_unknown] : s_default_error_messages[n];
typedef typename std::make_unsigned<regex_constants::error_type>::type unsigned_type;
return (static_cast<unsigned_type>(n) > ::boost::regex_constants::error_unknown) ? s_default_error_messages[::boost::regex_constants::error_unknown] : s_default_error_messages[n];
}

inline regex_constants::syntax_type get_default_syntax_type(char c)
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