std::match_results::position

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C++
 
正則表達式庫
類
Original:
Classes
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basic_regex（C++11）
sub_match（C++11）
match_results（C++11）
演算法
Original:
Algorithms
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regex_match（C++11）
regex_search（C++11）
regex_replace（C++11）
迭代器
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Iterators
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regex_iterator（C++11）
regex_token_iterator（C++11）
例外
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Exceptions
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regex_error（C++11）
性狀
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Traits
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regex_traits（C++11）
常量
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Constants
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syntax_option_type（C++11）
match_flag_type（C++11）
error_type（C++11）
 
std::match_results
成員函數
Original:
Member functions
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match_results::match_results
match_results::~match_results
match_results::operator=
match_results::get_allocator
國家
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State
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match_results::ready
元素的訪問
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Element access
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match_results::size
match_results::max_size
match_results::empty
match_results::length
match_results::position
match_results::str
match_results::operator_at
match_results::prefix
match_results::suffix
迭代器
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Iterators
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match_results::begin
match_results::cbegin
match_results::end
match_results::cend
格式
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Format
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match_results::format
修飾符
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Modifiers
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match_results::swap
 
difference_type position( size_type sub = 0 ) const;
 （C++11 起）
返回指定子匹配的第一個字元的位置.
Original:
Returns the position of the first character of the specified sub-match.
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如果n == 0，返回整個匹配表達式的第一個字元的位置.
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If n == 0, the position of the first character of entire matched expression is returned.
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如果n > 0 && n < size()，「N​​」個部分，則返回匹配的第一個字元的位置.
Original:
If n > 0 && n < size(), the position of the first character of nth sub-match is returned.
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如果n >= size()，無以倫比的比賽的第一個字元的位置，則返回.
Original:
if n >= size(), a position of the first character of the unmatched match is returned.
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目錄

[编辑] 參數

n -
整數，指定相匹配的檢查
Original:
integral number specifying which match to examine
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[编辑] 返回值

指定的匹配的第一個字元或子匹配的位置.
Original:
The position of the first character of the specified match or sub-match.
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[编辑] 為例

#include <iostream>
#include <regex>
#include <string>
 
int main()
{
    std::regex re("a(a)*b");
    std::string target("aaab");
    std::smatch sm;
 
    std::regex_match(target, sm, re);
    std::cout << sm.position(1) << '\n';
}

Output: 

1

[编辑] 另請參閱
返回指定的子匹配
Original:
returns specified sub-match
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（公共成員函數） [edit]
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