gbump.pass.cpp revision bc8d3f97eb5c958007f2713238472e0c1c8fe02c 
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// <streambuf>
11
12// template <class charT, class traits = char_traits<charT> >
13// class basic_streambuf;
14
15// void gbump(int n);
16
17#include <streambuf>
18#include <cassert>
19
20template <class CharT>
21struct test
22    : public std::basic_streambuf<CharT>
23{
24    typedef std::basic_streambuf<CharT> base;
25
26    test() {}
27
28    void setg(CharT* gbeg, CharT* gnext, CharT* gend)
29    {
30        base::setg(gbeg, gnext, gend);
31    }
32
33    void gbump(int n)
34    {
35        CharT* gbeg = base::eback();
36        CharT* gnext = base::gptr();
37        CharT* gend = base::egptr();
38        base::gbump(n);
39        assert(base::eback() == gbeg);
40        assert(base::gptr() == gnext+n);
41        assert(base::egptr() == gend);
42    }
43};
44
45int main()
46{
47    {
48        test<char> t;
49        char in[] = "ABCDE";
50        t.setg(in, in+1, in+sizeof(in)/sizeof(in[0]));
51        t.gbump(2);
52    }
53    {
54        test<wchar_t> t;
55        wchar_t in[] = L"ABCDE";
56        t.setg(in, in+1, in+sizeof(in)/sizeof(in[0]));
57        t.gbump(3);
58    }
59}
60