1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <locale> 11 12 // template <class charT> class ctype_byname; 13 14 // bool is(mask m, charT c) const; 15 16 #include <locale> 17 #include <type_traits> 18 #include <cassert> 19 20 int main() 21 { 22 { 23 std::locale l("C"); 24 { 25 typedef std::ctype<wchar_t> WF; 26 const WF& wf = std::use_facet<WF>(l); 27 typedef std::ctype<char> CF; 28 const CF& cf = std::use_facet<CF>(l); 29 30 // The ctype masks in Newlib don't form a proper bitmask because 31 // the mask is only 8 bits wide, and there are more than 8 mask 32 // kinds. This means that the mask for alpha is (_U | _L), which 33 // is tricky to match in the do_is implementation because in 34 // [22.4.1.1.2 2] the standard specifies that the match code behaves 35 // like (m & M) != 0, but following this exactly would give false 36 // positives for characters that are both 'upper' and 'alpha', but 37 // not 'lower', for example. 38 assert( wf.is(WF::upper, L'A')); 39 assert( cf.is(CF::upper, 'A')); 40 assert(!wf.is(WF::lower, L'A')); 41 assert(!cf.is(CF::lower, 'A')); 42 assert( wf.is(WF::alpha, L'A')); 43 assert( cf.is(CF::alpha, 'A')); 44 45 assert(!wf.is(WF::upper, L'a')); 46 assert(!cf.is(CF::upper, 'a')); 47 assert( wf.is(WF::lower, L'a')); 48 assert( cf.is(CF::lower, 'a')); 49 assert( wf.is(WF::alpha, L'a')); 50 assert( cf.is(CF::alpha, 'a')); 51 } 52 } 53 } 54
