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  1. #include <iostream>
  2. #include <vector>
  3. #include <locale>
  4. #include <sstream>
  5.  
  6. // This ctype facet classifies .^:;\n but not anything else as whitespace
  7. struct my_whitespace : std::ctype<char> {
  8.     static const mask* make_table()
  9.     {
  10.         // make a copy of the "C" locale table
  11.         static std::vector<mask> v(classic_table(),  classic_table() + table_size);
  12.         // these will be whitespace
  13.         v['.'] |=  space; 
  14.         v['^'] |=  space; 
  15.         v[':'] |=  space; 
  16.         v[';'] |=  space; 
  17.         // space and tab won't be whitespace
  18.         v[' '] &= ~space;
  19.         v['\t'] &= ~space;
  20.         return &v[0];
  21.     }
  22.     my_whitespace(std::size_t refs = 0) :
  23.         std::ctype<char>(make_table(), false, refs) {}
  24. };
  25.  
  26. int main()
  27. {
  28.     std::string in = "a:b.c;d\ne^f";
  29.  
  30.     std::istringstream s(in);
  31.     s.imbue(std::locale(s.getloc(), new my_whitespace()));
  32.  
  33.     std::string token;
  34.     while(s >> token)
  35.         std::cout << "  " << token<< '\n';
  36. }
Success #stdin #stdout 0.02s 2820KB
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https://ideone.com/DHS28
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
secret

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