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match_results:
#include template < typename BidirectionalIterator, typename Allocator = allocator >> class match_results;
The class template match_results holds a collection of character sequences that represent the result of a regular expression match. Several specializations for common character sequence types are provided:
typedef match_results cmatch;typedef match_results wcmatch;typedef match_results smatch;typedef match_results wsmatch;
字匹配的类型
wssub_match csub_matchwcsub_matchssub_match
| Member type | Definition |
sub_match<BidirectionalIterator> | value_type |
const value_type& | const_reference |
const_reference | reference |
| (implementation-defined) | const_iterator |
const_iterator | iterator |
typename iterator_traits<BidirectionalIterator>::difference_type | difference_type |
typename allocator_traits<Allocator>::size_type | size_type |
Allocator | allocator_type |
typename iterator_traits<BidirectionalIterator>::value_type | char_type |
std::basic_string<char_type> | string_type |
| | create a match |
| | assign values to a match |
| | returns the allocator for this object |
| | swaps the matched sub-expressions with another match_results |
| | 如果匹配成功，返回 1 + 匹配的子表达式个数 |
| | 最多可存储子匹配的个数 |
| | 返回true 当有至少一个子匹配时，否则返回false |
| | the length of a particular sub-expression |
| | the distance between the start of the target sequence and a given sub-expression |
| | the sequence of characters for a given sub-expression |
| | returns a reference to the |
| | the characters from the start of the original sequence to the beginning of the match |
| | the characters from the end of the match to the end of the original sequence |
| | an iterator that enumerates the sub-expressions in *this |
| | an iterator that terminates the sub-expressions in *this |
| | length(int sub=0) 指定子表达式的长度 |
| | position(int sub=0) 指定子表达式与被匹配串开头之间的字节数 |
| | str(int sub=0) 指定子表达式匹配得到的字串的长度 |
| | []返回子匹配 |
| | 原始串的开头到第一个匹配点的字节数 |
| | 匹配点的下一个位置到原始串结束的字节数 |
| | 返回指向第一个子匹配(what[0])的迭代器 |
| | |
| | formats match results for output |
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