本文整理汇总了C++中Istream::getloc方法的典型用法代码示例。如果您正苦于以下问题：C++ Istream::getloc方法的具体用法？C++ Istream::getloc怎么用？C++ Istream::getloc使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Istream的用法示例。
在下文中一共展示了Istream::getloc方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: test_ok
void test_ok (const charT*, const Traits*,
const char *cname, const char *tname)
{
typedef std::basic_istream<charT, Traits> Istream;
typedef typename Istream::sentry Sentry;
memfun_info (__LINE__, cname, tname, "operator bool () const");
const charT cbuf[] = { 'a', 'b', 'c', 'd', 'e', ' ', 'f', '\0' };
const std::ios_base::iostate states[] = {
std::ios_base::badbit,
std::ios_base::eofbit,
std::ios_base::failbit,
std::ios_base::goodbit,
std::ios_base::badbit | std::ios_base::eofbit,
std::ios_base::badbit | std::ios_base::failbit,
std::ios_base::eofbit | std::ios_base::failbit,
std::ios_base::badbit | std::ios_base::eofbit | std::ios_base::failbit
};
//////////////////////////////////////////////////////////////
// exercise 27.6.1.1.2, p5:
// - is.good() is true
// - noskipws is zero
// - is.flags() & ios_base::skipws
// - the function extracts and discards each character as long
// as the next available input character c is a whitespace
// character
// = if, after any preparation is completed, is.good() is true,
// ok_ != false otherwise, ok_ == false.
unsigned iter = 0; // iteration counter
for (unsigned i = 0; i != sizeof states / sizeof *states; ++i) {
for (unsigned j = 0; j != 2; ++j /* noskipws */) {
for (unsigned k = 0; k != 2; ++k /* ios_base::skipws */) {
for (charT wc = charT ('a'); wc != charT ('c'); ++wc) {
const Ctype<charT> ctp (1, wc);
Streambuf<charT, Traits>
sb (cbuf, cbuf + sizeof cbuf / sizeof *cbuf);
Istream is (&sb);
is.setstate (states [i]);
if (k)
is.setf (std::ios_base::skipws);
else
is.unsetf (std::ios_base::skipws);
const std::locale loc =
is.imbue (std::locale (is.getloc (), &ctp));
// imbue the previous locale into the stream
// buffer to verify that the sentry ctor uses
// the locale imbued in the stream object and
// not the one in the stream buffer
sb.pubimbue (loc);
const Sentry guard (is, 0 != j);
_RWSTD_UNUSED (guard);
const bool success =
is.good () && guard
|| !is.good () && !guard;
rw_assert (success, 0, __LINE__,
"%u. %{$SENTRY}"
"(%{$ISTREAM} &is, bool noskipws "
"= %d).operator bool() == %d; initial "
"is.state() = %{Is}, is.flags() & "
"ios::skipws = %d",
iter, j, is.good (),
states [i], k);
++iter;
}
}
}
}
}示例2: test_ctor
void test_ctor (const charT*, const Traits*,
const char *cname, const char *tname)
{
typedef std::basic_istream<charT, Traits> Istream;
typedef typename Istream::sentry Sentry;
memfun_info (__LINE__, cname, tname, "sentry (%{$ISTREAM}&, bool)");
const charT cbuf[] = { 'a', 'b', 'c', 'd', 'e', ' ', 'f', '\0' };
const std::ios_base::iostate states[] = {
std::ios_base::badbit,
std::ios_base::eofbit,
std::ios_base::failbit,
std::ios_base::goodbit,
std::ios_base::badbit | std::ios_base::eofbit,
std::ios_base::badbit | std::ios_base::failbit,
std::ios_base::eofbit | std::ios_base::failbit,
std::ios_base::badbit | std::ios_base::eofbit | std::ios_base::failbit
};
//////////////////////////////////////////////////////////////
// exercise 27.6.1.1.2, p1:
// - is.good() is true
// - is.tie() is not null
// = the function calls is.tie().flush()
unsigned iter = 0; // iteration counter
for (unsigned i = 0; i != sizeof states / sizeof *states; ++i) {
for (unsigned j = 0; j != 2; ++j /* noskipws */) {
Streambuf<charT, Traits>
sb (cbuf, cbuf + sizeof cbuf / sizeof *cbuf);
Istream is (&sb);
// flush() is called iff
// all of the following conditions hold
const bool flush_called = is.good () && 0 != is.tie ();
const Sentry guard (is, 0 != j);
_RWSTD_UNUSED (guard);
rw_assert (flush_called == sb.nsyncs_, 0, __LINE__,
"%u. basic_istream<%s, %s>::sentry::sentry"
"(basic_istream &is, bool noskipws = %d); "
"expected to call is.flush () %d times, got %d"
"initial is.state () = %{Is}, is.flags() & "
"ios::skipws = %d",
iter, cname, tname, 0 != j, flush_called, sb.nsyncs_,
states [i], is.flags () & std::ios_base::skipws);
++iter;
}
}
//////////////////////////////////////////////////////////////
// exercise 27.6.1.1.2, p1:
// - is.good() is true
// - noskipws is zero
// - is.flags() & ios_base::skipws
// = the function extracts and discards each character as long
// as the next available input character c is a whitespace
// character.
for (unsigned i = 0; i != sizeof states / sizeof *states; ++i) {
for (unsigned j = 0; j != 2; ++j /* noskipws */) {
for (unsigned k = 0; k != 2; ++k /* ios_base::skipws */) {
for (charT wc = charT ('a'); wc != charT ('c'); ++wc) {
const Ctype<charT> ctp (1, wc);
Streambuf<charT, Traits>
sb (cbuf, cbuf + sizeof cbuf / sizeof *cbuf);
Istream is (&sb);
is.setstate (states [i]);
if (k)
is.setf (std::ios_base::skipws);
else
is.unsetf (std::ios_base::skipws);
const std::locale loc =
is.imbue (std::locale (is.getloc (), &ctp));
// imbue the previous locale into the stream
// buffer to verify that the sentry ctor uses
// the locale imbued in the stream object and
// not the one in the stream buffer
sb.pubimbue (loc);
// a whitespace character is extracted iff
// all of the following conditions hold
const bool extract =
is.good ()
&& 0 == j
&& is.flags () & std::ios_base::skipws
//.........这里部分代码省略.........