Regular Expression Strange Behaviour

[nellute]

Hi, All,

I have found this strange behaviour

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int main(int argc, char* argv[])
{
    std::string value_tmp = "123456789";
    if (Poco::RegularExpression("[0-9]*").match(value_tmp) == true)
    {
        std::cout << "match" << std::endl;
    }

    return 0;
}

The above codes runs fine, it prints out the string "match".

However, if the string value_tmp contains a ' at the end, it does not match.

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"123456789'"

Any idea ?

BTW, I fell in love with Poco recently.

[nellute]

Sorry for the confusion.

I found out the answer.

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Poco::RegularExpression("[0-9]*").match(value_tmp)

is really matching the entire string against the pattern.

What I was looking for is to match a substring. The following will work for me.

Code: Select all

Poco::RegularExpression::Match match;

Poco::RegularExpression("[0-9]*").match(value_tmp, match)