ios
标准库标头<ios>
此标头是输入/输出图书馆。
包括
*。
<iosfwd>
班
IOS[医]BASE管理格式化标志和输入/输出异常%28class%29
基本[医]IOS管理任意流缓冲区%28类模板%29
FPO表示流或文件%28类模板%29中的绝对位置。
井上[医]ERRC%28C++11%29 IO流错误码%28 enum%29
碘流[医]类别%28C++11%29标识碘流错误类别%28功能%29
是[医]误差[医]代码[医]enum<std：：io[医]ERRC>%28C++11%29扩展类型性状std：：is[医]误差[医]代码[医]标识iostream错误代码%28类模板%29
台培
流表示相对文件/流位置%28与FPO%29的偏移量，足以表示任何文件大小%28-胡枝子f%29
流大小表示在I/O操作中传输的字符数或I/O缓冲区%28-胡枝子f%29的大小
功能
制造[医]误差[医]代码%28std：：io[医]erc%29%28C++11%29构造一个iostream错误代码%28函数%29
制造[医]误差[医]条件%28 std：：io[医]ERRC%29%28C++11%29构造一个输入流错误[医]条件%28功能%29
boolalphanoboolalpha在booleans%28函数%29的文本和数字表示之间切换
showbasenoshowbase控制前缀是否用于表示数字基%28函数%29。
显示点控制小数点是否总是包含在浮点数表示形式%28函数%29中。
Disposnoshowpos控制非负数使用的+符号是否为%28函数%29。
在输入%28函数%29上是否跳过前导空格。
大写字母控制大写字符是否与某些输出格式一起使用%28函数%29
Unitbufnounitbuf控制每次操作后是否刷新输出%28功能%29
内左方设置填充字符的位置%28函数%29
改变整数I/O%28函数%29的基
修正科学的六浮动默认浮点数%28C+11%29%28C+11%29用于浮点I/O%28功能%29的格式更改
简介
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#include <iosfwd>
namespace std {
typedef /*implementation-defined*/ streamoff;
typedef /*implementation-defined*/ streamsize;
template <class stateT> class fpos;
class ios_base;
template <class charT, class traits = char_traits<charT> >
class basic_ios;
// manipulators:
ios_base& boolalpha (ios_base& str
ios_base& noboolalpha(ios_base& str
ios_base& showbase (ios_base& str
ios_base& noshowbase (ios_base& str
ios_base& showpoint (ios_base& str
ios_base& noshowpoint(ios_base& str
ios_base& showpos (ios_base& str
ios_base& noshowpos (ios_base& str
ios_base& skipws (ios_base& str
ios_base& noskipws (ios_base& str
ios_base& uppercase (ios_base& str
ios_base& nouppercase(ios_base& str
ios_base& unitbuf (ios_base& str
ios_base& nounitbuf (ios_base& str
ios_base& internal (ios_base& str
ios_base& left (ios_base& str
ios_base& right (ios_base& str
ios_base& dec (ios_base& str
ios_base& hex (ios_base& str
ios_base& oct (ios_base& str
ios_base& fixed (ios_base& str
ios_base& scientific (ios_base& str
ios_base& hexfloat (ios_base& str
ios_base& defaultfloat(ios_base& str
enum class io_errc {
stream = 1
};
template <>
struct is_error_code_enum<io_errc> : public true_type { };
error_code make_error_code(io_errc e
error_condition make_error_condition(io_errc e
const error_category& iostream_category(
}
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类std::ios_base
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class ios_base {
public:
class failure;
// fmtflags
typedef /*bitmask-type-1*/ fmtflags;
static constexpr fmtflags boolalpha = /*unspecified*/;
static constexpr fmtflags dec = /*unspecified*/;
static constexpr fmtflags fixed = /*unspecified*/;
static constexpr fmtflags hex = /*unspecified*/;
static constexpr fmtflags internal = /*unspecified*/;
static constexpr fmtflags left = /*unspecified*/;
static constexpr fmtflags oct = /*unspecified*/;
static constexpr fmtflags right = /*unspecified*/;
static constexpr fmtflags scientific = /*unspecified*/;
static constexpr fmtflags showbase = /*unspecified*/;
static constexpr fmtflags showpoint = /*unspecified*/;
static constexpr fmtflags showpos = /*unspecified*/;
static constexpr fmtflags skipws = /*unspecified*/;
static constexpr fmtflags unitbuf = /*unspecified*/;
static constexpr fmtflags uppercase = /*unspecified*/;
static constexpr fmtflags adjustfield = /*left|right|internal*/ ;
static constexpr fmtflags basefield = /*dec|oct|hex*/ ;
static constexpr fmtflags floatfield = /*scientific|fixed*/ ;
// iostate
typedef /*bitmask-type-2*/ iostate;
static constexpr iostate badbit = /*unspecified*/;
static constexpr iostate eofbit = /*unspecified*/;
static constexpr iostate failbit = /*unspecified*/;
static constexpr iostate goodbit = /*0*/ ;
// openmode
typedef /*bitmask-type-3*/ openmode;
static constexpr openmode app = /*unspecified*/;
static constexpr openmode ate = /*unspecified*/;
static constexpr openmode binary = /*unspecified*/;
static constexpr openmode in = /*unspecified*/;
static constexpr openmode out = /*unspecified*/;
static constexpr openmode trunc = /*unspecified*/;
// seekdir
typedef /*bitmask-type-4*/ seekdir;
static constexpr seekdir beg = /*unspecified*/;
static constexpr seekdir cur = /*unspecified*/;
static constexpr seekdir end = /*unspecified*/;
class Init;
// fmtflags state:
fmtflags flags() const;
fmtflags flags(fmtflags fmtfl
fmtflags setf(fmtflags fmtfl
fmtflags setf(fmtflags fmtfl, fmtflags mask
void unsetf(fmtflags mask
streamsize precision() const;
streamsize precision(streamsize prec
streamsize width() const;
streamsize width(streamsize wide
// locales:
locale imbue(const locale& loc
locale getloc() const;
// storage:
static int xalloc(
long& iword(int index
void*& pword(int index
// destructor
virtual ~ios_base(
// callbacks;
enum event {
erase_event,
imbue_event,
copyfmt_event
};
typedef void (*event_callback)(event, ios_base&, int index
void register_callback(event_callback fn, int index
ios_base(const ios_base&) = delete;
ios_base& operator=(const ios_base&) = delete;
static bool sync_with_stdio(bool sync = true
protected:
ios_base(
private:
static int index; // exposition only
long* iarray; // exposition only
void** parray; // exposition only
};
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类std::ios_base::failure
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class ios_base::failure : public system_error {
public:
explicit failure(const string& msg, const error_code& ec = io_errc::stream
explicit failure(const char* msg, const error_code& ec = io_errc::stream
};
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类std::ios_base::Init
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class ios_base::Init {
public:
Init(
~Init(
private:
static int init_cnt; // exposition only
};
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类std::fpos
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template <class stateT> class fpos {
public:
stateT state() const;
void state(stateT
private;
stateT st; // exposition only
};
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类std::basic_ios
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template <class charT, class traits = char_traits<charT> >
class basic_ios : public ios_base {
public:
// types:
typedef charT char_type;
typedef typename traits::int_type int_type;
typedef typename traits::pos_type pos_type;
typedef typename traits::off_type off_type;
typedef traits traits_type;
explicit operator bool() const;
bool operator!() const;
iostate rdstate() const;
void clear(iostate state = goodbit
void setstate(iostate state
bool good() const;
bool eof() const;
bool fail() const;
bool bad() const;
iostate exceptions() const;
void exceptions(iostate except
// Constructor/destructor:
explicit basic_ios(basic_streambuf<charT,traits>* sb
virtual ~basic_ios(
// Members:
basic_ostream<charT,traits>* tie() const;
basic_ostream<charT,traits>* tie(basic_ostream<charT,traits>* tiestr
basic_streambuf<charT,traits>* rdbuf() const;
basic_streambuf<charT,traits>* rdbuf(basic_streambuf<charT,traits>* sb
basic_ios& copyfmt(const basic_ios& rhs
char_type fill() const;
char_type fill(char_type ch
locale imbue(const locale& loc
char narrow(char_type c, char dfault) const;
char_type widen(char c) const;
basic_ios(const basic_ios& ) = delete;
basic_ios& operator=(const basic_ios&) = delete;
protected:
basic_ios(
void init(basic_streambuf<charT,traits>* sb
void move(basic_ios& rhs
void move(basic_ios&& rhs
void swap(basic_ios& rhs) noexcept;
void set_rdbuf(basic_streambuf<charT, traits>* sb
};
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