Help! Boost regular expression exception

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C++

Boost

Regular Expression: (?<=\D|^)(1[358]\d{9})(?=\D|$)

when I use boost regex:

char pat[] = {"(?<=\\D|^)(1[358]\\d{9})(?=\\D|$)"};
boost::regex reg(pat);

here throw an exception!

If I use POSIX, no exception, but can't match, for example:
boost::regex reg(pat, regbase::basic_syntax_group);
std::string str("+86 18601234567 tel.");

bool matched = regex_match(str, reg); // false!!!

who can tell me what's the matter? Pls send email to jianggx@hotmail.com, thanks!

What I have tried:

when I use C#, it's ok.
for example:

string pat = @"(?<=\D|^)(1[358]\d{9})(?=\D|$)";
string myinfo= "custom name: name1;tel:+86 18601234567;addr:beijing.";
Regex rg = new Regex(pattern);
MatchCollection mc = rg.Matches(myinfo);