std::ctype::scan_is, std::ctype::do_scan_is
From cppreference.com
| Defined in header <locale>
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| public: const CharT* scan_is( mask m, const CharT* beg, const CharT* end ) const; |
(1) | |
| protected: virtual const CharT* do_scan_is( mask m, const CharT* beg, const CharT* end) const; |
(2) | |
1) public member function, calls the protected virtual member function
do_scan_is of the most derived class.2) Locates the first character in the character array
[beg, end) that satisfies the classification mask m, that is, the first character c such that is(m, c) would return true.Parameters
| m | - | mask to search for |
| beg | - | pointer to the first character in an array of characters to search |
| end | - | one past the end pointer for the array of characters to search |
Return value
Pointer to the first character in [beg, end) that satisfies the mask, or end if no such character was found.
Example
Run this code
#include <locale> #include <iostream> #include <iterator> int main() { auto& f = std::use_facet<std::ctype<char>>(std::locale("")); // skip until the first letter char s1[] = " \t\t\n Test"; const char* p1 = f.scan_is(std::ctype_base::alpha, std::begin(s1), std::end(s1)); std::cout << "'" << p1 << "'\n"; // skip until the first letter char s2[] = "123456789abcd"; const char* p2 = f.scan_is(std::ctype_base::alpha, std::begin(s2), std::end(s2)); std::cout << "'" << p2 << "'\n"; }
Output:
'Test' 'abcd'
See also
| [virtual] |
locates the first character in a sequence that fails given classification (virtual protected member function) |