#include <iostream>
#include <boost/regex/icu.hpp>

int main(void)
{
    boost::make_u32regex("\xed\xa0\x80"); // single lowest lead surrogate U+D800
    boost::make_u32regex("\xed\xaf\xbf"); // single highest lead surrogate U+DBFF
    boost::make_u32regex("\xed\xb0\x80"); // single lowest trail surrogate U+DC00
    boost::make_u32regex("\xed\xbf\xbf"); // single highest trail surrogate U+DFFF

    // overlong encodings (created by left-padding with zero bits)
    boost::make_u32regex("\xc0\x80"); // illegal 2-byte encoding of 1-byte character U+0000
    boost::make_u32regex("\xe0\x80\x80"); // illegal 3-byte encoding of 1-byte character U+0000
    boost::make_u32regex("\xf0\x80\x80\x80"); // illegal 4-byte encoding of 1-byte character U+0000

    boost::make_u32regex("\xc1\xbf"); // illegal 2-byte encoding of 1-byte character U+007F
    boost::make_u32regex("\xe0\x81\xbf"); // illegal 3-byte encoding of 1-byte character U+007F
    boost::make_u32regex("\xf0\x80\x81\xbf"); // illegal 4-byte encoding of 1-byte character U+007F

    boost::make_u32regex("\xe0\x82\x80"); // illegal 3-byte encoding of 2-byte character U+0080
    boost::make_u32regex("\xf0\x80\x82\x80"); // illegal 4-byte encoding of 2-byte character U+0080

    boost::make_u32regex("\xe0\x9f\xbf"); // illegal 3-byte encoding of 2-byte character U+07FF
    boost::make_u32regex("\xf0\x80\x9f\xbf"); // illegal 4-byte encoding of 2-byte character U+07FF

    boost::make_u32regex("\xf0\x80\xa0\x80"); // illegal 4-byte encoding of 3-byte character U+0800

    boost::make_u32regex("\xf0\x8f\xbf\xbf"); // illegal 4-byte encoding of 3-byte character U+FFFF

    return 0;
}