c++ - Boost::regex_match 没有触发

Question

我有一些我认为应该触发的 boost Regex 代码。我是 boost 的新手，但我对 Regex 有一点了解。这是我正在使用的代码。

re = boost::basic_regex<TCHAR>(_T("-+\\s+Original\\s+Message\\s+-+"), boost::regex_constants::icase);
boost::match_results<TSTRING::const_iterator> result;
if(boost::regex_match(RawBody, result, re))

这是我正在使用的测试字符串。

this is a test

-------- Original Message --------

everything under here should disappear

我的代码编译并运行，只是没有触发 if 语句。我尝试调试到 boost 代码中......是的......

Answer 1

正则表达式匹配

The algorithm regex_match determines whether a given regular expression matches all of a given character sequence denoted by a pair of bidirectional-iterators, the algorithm is defined as follows, the main use of this function is data input validation.

正则表达式搜索

The algorithm regex_search will search a range denoted by a pair of bidirectional-iterators for a given regular expression. The algorithm uses various heuristics to reduce the search time by only checking for a match if a match could conceivably start at that position. The algorithm is defined as follows:

因此，使用 boost::regex_search。示例。

http://liveworkspace.org/code/fa35778995c4bd1e191c785671ab94b6