使用正则表达式查找字符串错误

不能理解为何这样一个这个的代码就会报函数已删除的错误

#include 
#include 
#include 

using namespace std;

int main()
{
    regex r;
    try {
        r.assign("[[:alnum:]]+\\.(cpp|cxx|cc)$", regex::icase);
    }catch(regex_error e)
    {
        cout << e.what() << "\ncode: " << e.code() << endl;
    }
    smatch results;
    if (regex_search(string("myfile.cc"), results, r))
        cout << results.str() << endl;
}

但是下面这样的代码就可以正常查找，有没有人知道原因为何？

#include 
#include 
#include 

using namespace std;

int main()
{
    regex r;
    try {
        r.assign("[[:alnum:]]+\\.(cpp|cxx|cc)$", regex::icase);
    }catch(regex_error e)
    {
        cout << e.what() << "\ncode: " << e.code() << endl;
    }
    smatch results;
    string s = "myfile.cc";
    if (regex_search(s, results, r))
        cout << results.str() << endl;
}

string参数为右值的regex_search()函数在声明时被标为delete了. 编译器的设置.

#if _LIBCPP_STD_VER > 11
template <class _ST, class _SA, class _Ap, class _Cp, class _Tp>
bool
regex_search(const basic_string<_Cp, _ST, _SA>&& __s,
             match_results<typename basic_string<_Cp, _ST, _SA>::const_iterator, _Ap>&,
             const basic_regex<_Cp, _Tp>& __e,
             regex_constants::match_flag_type __flags = regex_constants::match_default) = delete;
#endif

正则表达式的库有很多，boost里面也有，不行换一个。

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• 
  

  TSP：

  from datetime import datetime
  import random
  import math
  
  from utils.logger import log_tsp as log
  
  
  dts = datetime.now()
  
  
  # nodes
  NUM_NODE = 50
  NUM_NODE_NAV = 20
  LIST_NODE_UAV = list(range(NUM_NODE - NUM_NODE_NAV + 1, NUM_NODE + 1))
  
  # coordinates
  random.seed(2021)
  RANGE_COORDINATE = (0, 100)
  LIST_COORDINATE = [(random.randint(RANGE_COORDINATE[0], RANGE_COORDINATE[1]),
                      random.randint(RANGE_COORDINATE[0], RANGE_COORDINATE[1])) for _ in range(NUM_NODE)]
  
  # distance
  ORIGIN = (round((RANGE_COORDINATE[1] - RANGE_COORDINATE[0]) / 2),
            round((RANGE_COORDINATE[1] - RANGE_COORDINATE[0]) / 2))
  LIST_COORDINATE_ = [ORIGIN] + LIST_COORDINATE
  MAT_DISTANCE = [[0.0 for _ in range(0, NUM_NODE + 1)] for _ in range(0, NUM_NODE + 1)]
  range_wave = (0.8, 1.2)
  for i in range(0, NUM_NODE + 1):
      for j in range(0, NUM_NODE + 1):
          distance = round(math.sqrt((LIST_COORDINATE_[i][0] - LIST_COORDINATE_[j][0]) ** 2
                                     + (LIST_COORDINATE_[i][1] - LIST_COORDINATE_[j][1]) ** 2)
                           * (range_wave[0] + random.random() * (range_wave[1] - range_wave[0])), 4)
          MAT_DISTANCE[i][j] = distance
  
  # cost
  COST_UAV = 0.2
  
  
  dte = datetime.now()
  tm = round((dte - dts).seconds + (dte - dts).microseconds / (10 ** 6), 3)
  log.info(msg="random data generating time:  {} s".format(tm))
  

  
  

  VRP：

  from datetime import datetime
  import random
  import math
  
  from utils.logger import log_vrp as log
  
  
  dts = datetime.now()
  
  
  # nodes
  NUM_NODE = 50
  NUM_NODE_NAV = 10
  LIST_NODE_UAV = list(range(NUM_NODE - NUM_NODE_NAV + 1, NUM_NODE + 1))
  
  # coordinates
  random.seed(2021)
  RANGE_COORDINATE = (0, 100)
  LIST_COORDINATE = [(random.randint(RANGE_COORDINATE[0], RANGE_COORDINATE[1]),
                      random.randint(RANGE_COORDINATE[0], RANGE_COORDINATE[1])) for _ in range(NUM_NODE)]
  
  # distance
  ORIGIN = (round((RANGE_COORDINATE[1] - RANGE_COORDINATE[0]) / 2),
            round((RANGE_COORDINATE[1] - RANGE_COORDINATE[0]) / 2))
  LIST_COORDINATE_ = [ORIGIN] + LIST_COORDINATE
  MAT_DISTANCE = [[0.0 for _ in range(0, NUM_NODE + 1)] for _ in range(0, NUM_NODE + 1)]
  range_wave = (0.8, 1.2)
  for i in range(0, NUM_NODE + 1):
      for j in range(0, NUM_NODE + 1):
          distance = round(math.sqrt((LIST_COORDINATE_[i][0] - LIST_COORDINATE_[j][0]) ** 2
                                     + (LIST_COORDINATE_[i][1] - LIST_COORDINATE_[j][1]) ** 2)
                           * (range_wave[0] + random.random() * (range_wave[1] - range_wave[0])), 4)
          MAT_DISTANCE[i][j] = distance
  
  # cost
  COST_UAV = 0.1
  
  # weight, load
  upper_weight_item = 20
  LIST_WEIGHT = [random.randint(0, upper_weight_item) for _ in range(NUM_NODE)]
  UPPER_LOAD = 100
  log.info(msg="total weight:  {}".format(sum(LIST_WEIGHT)))
  
  
  dte = datetime.now()
  tm = round((dte - dts).seconds + (dte - dts).microseconds / (10 ** 6), 3)
  log.info(msg="random data generating time:  {} s".format(tm))
  

  
  
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