compare.pass.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <locale>
11
12// template <class charT> class collate;
13
14// int compare(const charT* low1, const charT* high1,
15//             const charT* low2, const charT* high2) const;
16
17#include <locale>
18#include <cassert>
19
20
21int main()
22{
23    std::locale l = std::locale::classic();
24    {
25        const char ia[] = "1234";
26        const unsigned sa = sizeof(ia)/sizeof(ia[0]);
27        const char ib[] = "123";
28        const std::collate<char>& f = std::use_facet<std::collate<char> >(l);
29        assert(f.compare(ia, ia+sa, ib, ib+2) == 1);
30        assert(f.compare(ib, ib+2, ia, ia+sa) == -1);
31        assert(f.compare(ia, ia+sa, ib, ib+3) == 1);
32        assert(f.compare(ib, ib+3, ia, ia+sa) == -1);
33        assert(f.compare(ia, ia+sa, ib+1, ib+3) == -1);
34        assert(f.compare(ib+1, ib+3, ia, ia+sa) == 1);
35        assert(f.compare(ia, ia+3, ib, ib+3) == 0);
36    }
37    {
38        const wchar_t ia[] = L"1234";
39        const unsigned sa = sizeof(ia)/sizeof(ia[0]);
40        const wchar_t ib[] = L"123";
41        const std::collate<wchar_t>& f = std::use_facet<std::collate<wchar_t> >(l);
42        assert(f.compare(ia, ia+sa, ib, ib+2) == 1);
43        assert(f.compare(ib, ib+2, ia, ia+sa) == -1);
44        assert(f.compare(ia, ia+sa, ib, ib+3) == 1);
45        assert(f.compare(ib, ib+3, ia, ia+sa) == -1);
46        assert(f.compare(ia, ia+sa, ib+1, ib+3) == -1);
47        assert(f.compare(ib+1, ib+3, ia, ia+sa) == 1);
48        assert(f.compare(ia, ia+3, ib, ib+3) == 0);
49    }
50}
51