Inheritance diagram for std::basic_ifstream< _CharT, _Traits >:
Public Types | |
typedef _CharT | char_type |
typedef _Traits | traits_type |
typedef traits_type::int_type | int_type |
typedef traits_type::pos_type | pos_type |
typedef traits_type::off_type | off_type |
typedef _Ios_Fmtflags | fmtflags |
This is a bitmask type. | |
typedef _Ios_Iostate | iostate |
This is a bitmask type. | |
typedef _Ios_Openmode | openmode |
This is a bitmask type. | |
typedef _Ios_Seekdir | seekdir |
This is an enumerated type. | |
typedef void(* | event_callback )(event, ios_base &, int) |
enum | event |
Public Member Functions | |
basic_ifstream () | |
Default constructor. | |
basic_ifstream (const char *__s, ios_base::openmode __mode=ios_base::in) | |
Create an input file stream. | |
~basic_ifstream () | |
The destructor does nothing. | |
__filebuf_type * | rdbuf () const |
Accessing the underlying buffer. | |
bool | is_open () |
Wrapper to test for an open file. | |
void | open (const char *__s, ios_base::openmode __mode=ios_base::in) |
Opens an external file. | |
void | close () |
Close the file. | |
streamsize | gcount () const |
Character counting. | |
iostate | rdstate () const |
Returns the error state of the stream buffer. | |
void | clear (iostate __state=goodbit) |
[Re]sets the error state. | |
void | setstate (iostate __state) |
Sets additional flags in the error state. | |
bool | good () const |
Fast error checking. | |
bool | eof () const |
Fast error checking. | |
bool | fail () const |
Fast error checking. | |
bool | bad () const |
Fast error checking. | |
iostate | exceptions () const |
Throwing exceptions on errors. | |
void | exceptions (iostate __except) |
Throwing exceptions on errors. | |
basic_ostream< _CharT, _Traits > * | tie () const |
Fetches the current tied stream. | |
basic_ostream< _CharT, _Traits > * | tie (basic_ostream< _CharT, _Traits > *__tiestr) |
Ties this stream to an output stream. | |
basic_streambuf< _CharT, _Traits > * | rdbuf (basic_streambuf< _CharT, _Traits > *__sb) |
Changing the underlying buffer. | |
basic_ios & | copyfmt (const basic_ios &__rhs) |
char_type | fill () const |
Retreives the "empty" character. | |
char_type | fill (char_type __ch) |
Sets a new "empty" character. | |
locale | imbue (const locale &__loc) |
Moves to a new locale. | |
char | narrow (char_type __c, char __dfault) const |
Squeezes characters. | |
char_type | widen (char __c) const |
Widens characters. | |
void | register_callback (event_callback __fn, int __index) |
fmtflags | flags () const |
Access to format flags. | |
fmtflags | flags (fmtflags __fmtfl) |
Setting new format flags all at once. | |
fmtflags | setf (fmtflags __fmtfl) |
Setting new format flags. | |
fmtflags | setf (fmtflags __fmtfl, fmtflags __mask) |
Setting new format flags. | |
void | unsetf (fmtflags __mask) |
Clearing format flags. | |
streamsize | precision () const |
Flags access. | |
streamsize | precision (streamsize __prec) |
Changing flags. | |
streamsize | width () const |
Flags access. | |
streamsize | width (streamsize __wide) |
Changing flags. | |
locale | getloc () const |
Locale access. | |
long & | iword (int __ix) |
void *& | pword (int __ix) |
__istream_type & | operator>> (__istream_type &(*__pf)(__istream_type &)) |
Interface for manipulators. | |
__istream_type & | operator>> (__ios_type &(*__pf)(__ios_type &)) |
Interface for manipulators. | |
__istream_type & | operator>> (ios_base &(*__pf)(ios_base &)) |
Interface for manipulators. | |
Arithmetic Extractors | |
All the operator>> functions (aka formatted input functions) have some common behavior. Each starts by constructing a temporary object of type std::basic_istream::sentry with the second argument (noskipws) set to false. This has several effects, concluding with the setting of a status flag; see the sentry documentation for more.If the sentry status is good, the function tries to extract whatever data is appropriate for the type of the argument.
If an exception is thrown during extraction, ios_base::badbit will be turned on in the stream's error state without causing an ios_base::failure to be thrown. The original exception will then be rethrown. | |
__istream_type & | operator>> (bool &__n) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (short &__n) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (unsigned short &__n) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (int &__n) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (unsigned int &__n) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (long &__n) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (unsigned long &__n) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (long long &__n) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (unsigned long long &__n) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (float &__f) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (double &__f) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (long double &__f) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (void *&__p) |
Basic arithmetic extractors. | |
__istream_type & | operator>> (__streambuf_type *__sb) |
Extracting into another streambuf. | |
Unformatted Input Functions | |
All the unformatted input functions have some common behavior. Each starts by constructing a temporary object of type std::basic_istream::sentry with the second argument (noskipws) set to true. This has several effects, concluding with the setting of a status flag; see the sentry documentation for more. If the sentry status is good, the function tries to extract whatever data is appropriate for the type of the argument. The number of characters extracted is stored for later retrieval by gcount().
If an exception is thrown during extraction, ios_base::badbit will be turned on in the stream's error state without causing an ios_base::failure to be thrown. The original exception will then be rethrown. | |
int_type | get () |
Simple extraction. | |
__istream_type & | get (char_type &__c) |
Simple extraction. | |
__istream_type & | get (char_type *__s, streamsize __n, char_type __delim) |
Simple multiple-character extraction. | |
__istream_type & | get (char_type *__s, streamsize __n) |
Simple multiple-character extraction. | |
__istream_type & | get (__streambuf_type &__sb, char_type __delim) |
Extraction into another streambuf. | |
__istream_type & | get (__streambuf_type &__sb) |
Extraction into another streambuf. | |
__istream_type & | getline (char_type *__s, streamsize __n, char_type __delim) |
String extraction. | |
__istream_type & | getline (char_type *__s, streamsize __n) |
String extraction. | |
__istream_type & | ignore (streamsize __n=1, int_type __delim=traits_type::eof()) |
Discarding characters. | |
int_type | peek () |
Looking ahead in the stream. | |
__istream_type & | read (char_type *__s, streamsize __n) |
Extraction without delimiters. | |
streamsize | readsome (char_type *__s, streamsize __n) |
Extraction until the buffer is exhausted, but no more. | |
__istream_type & | putback (char_type __c) |
Unextracting a single character. | |
__istream_type & | unget () |
Unextracting the previous character. | |
int | sync () |
Synchronizing the stream buffer. | |
pos_type | tellg () |
Getting the current read position. | |
__istream_type & | seekg (pos_type) |
Changing the current read position. | |
__istream_type & | seekg (off_type, ios_base::seekdir) |
Changing the current read position. | |
operator void * () const | |
The quick-and-easy status check. | |
bool | operator! () const |
The quick-and-easy status check. | |
Static Public Member Functions | |
bool | sync_with_stdio (bool __sync=true) |
Interaction with the standard C I/O objects. | |
int | xalloc () throw () |
Static Public Attributes | |
const fmtflags | boolalpha |
Insert/extract bool in alphabetic rather than numeric format. | |
const fmtflags | dec |
Converts integer input or generates integer output in decimal base. | |
const fmtflags | fixed |
Generate floating-point output in fixed-point notation. | |
const fmtflags | hex |
Converts integer input or generates integer output in hexadecimal base. | |
const fmtflags | internal |
Adds fill characters at a designated internal point in certain generated output, or identical to right if no such point is designated. | |
const fmtflags | left |
Adds fill characters on the right (final positions) of certain generated output. (I.e., the thing you print is flush left.). | |
const fmtflags | oct |
Converts integer input or generates integer output in octal base. | |
const fmtflags | right |
Adds fill characters on the left (initial positions) of certain generated output. (I.e., the thing you print is flush right.). | |
const fmtflags | scientific |
Generates floating-point output in scientific notation. | |
const fmtflags | showbase |
Generates a prefix indicating the numeric base of generated integer output. | |
const fmtflags | showpoint |
Generates a decimal-point character unconditionally in generated floating-point output. | |
const fmtflags | showpos |
Generates a + sign in non-negative generated numeric output. | |
const fmtflags | skipws |
Skips leading white space before certain input operations. | |
const fmtflags | unitbuf |
Flushes output after each output operation. | |
const fmtflags | uppercase |
Replaces certain lowercase letters with their uppercase equivalents in generated output. | |
const fmtflags | adjustfield |
A mask of left|right|internal. Useful for the 2-arg form of setf . | |
const fmtflags | basefield |
A mask of dec|oct|hex. Useful for the 2-arg form of setf . | |
const fmtflags | floatfield |
A mask of scientific|fixed. Useful for the 2-arg form of setf . | |
const iostate | badbit |
Indicates a loss of integrity in an input or output sequence (such as an irrecoverable read error from a file). | |
const iostate | eofbit |
Indicates that an input operation reached the end of an input sequence. | |
const iostate | failbit |
Indicates that an input operation failed to read the expected characters, or that an output operation failed to generate the desired characters. | |
const iostate | goodbit |
Indicates all is well. | |
const openmode | app |
Seek to end before each write. | |
const openmode | ate |
Open and seek to end immediately after opening. | |
const openmode | binary |
Perform input and output in binary mode (as opposed to text mode). This is probably not what you think it is; see http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#3 and http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#7 for more. | |
const openmode | in |
Open for input. Default for ifstream and fstream. | |
const openmode | out |
Open for output. Default for ofstream and fstream. | |
const openmode | trunc |
Open for input. Default for ofstream . | |
const seekdir | beg |
Request a seek relative to the beginning of the stream. | |
const seekdir | cur |
Request a seek relative to the current position within the sequence. | |
const seekdir | end |
Request a seek relative to the current end of the sequence. | |
Protected Member Functions | |
void | init (basic_streambuf< _CharT, _Traits > *__sb, __locale_cache< _CharT > *__cache=0) |
All setup is performed here. |
This class supports reading from named files, using the inherited functions from std::basic_istream. To control the associated sequence, an instance of std::basic_filebuf is used, which this page refers to as sb
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Definition at line 472 of file fstream.
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These are standard types. They permit a standardized way of referring to names of (or names dependant on) the template parameters, which are specific to the implementation. Reimplemented from std::basic_istream< _CharT, _Traits >. |
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Definition at line 357 of file ios_base.h. |
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This is a bitmask type.
Definition at line 214 of file ios_base.h. |
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These are standard types. They permit a standardized way of referring to names of (or names dependant on) the template parameters, which are specific to the implementation. Reimplemented from std::basic_istream< _CharT, _Traits >. |
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This is a bitmask type.
Definition at line 271 of file ios_base.h. |
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These are standard types. They permit a standardized way of referring to names of (or names dependant on) the template parameters, which are specific to the implementation. Reimplemented from std::basic_istream< _CharT, _Traits >. |
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This is a bitmask type.
Definition at line 298 of file ios_base.h. |
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These are standard types. They permit a standardized way of referring to names of (or names dependant on) the template parameters, which are specific to the implementation. Reimplemented from std::basic_istream< _CharT, _Traits >. |
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This is an enumerated type.
Definition at line 325 of file ios_base.h. |
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These are standard types. They permit a standardized way of referring to names of (or names dependant on) the template parameters, which are specific to the implementation. Reimplemented from std::basic_istream< _CharT, _Traits >. |
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Definition at line 347 of file ios_base.h. |
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Default constructor.
Initializes Definition at line 504 of file fstream. References std::basic_ios< _CharT, _Traits >::init(). |
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Create an input file stream.
ios_base::in is automatically included in mode.Tip: When using std::string to hold the filename, you must use .c_str() before passing it to this constructor. Definition at line 519 of file fstream. References std::basic_ios< _CharT, _Traits >::init(), and std::basic_ifstream< _CharT, _Traits >::open(). |
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The destructor does nothing. The file is closed by the filebuf object, not the formatting stream. |
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Fast error checking.
Definition at line 186 of file basic_ios.h. |
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[Re]sets the error state.
Definition at line 39 of file basic_ios.tcc. References std::ios_base::badbit, std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::rdstate(). Referenced by std::basic_ios< char, _Traits >::exceptions(), std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< char, _Traits >::setstate(). |
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Close the file.
Calls Definition at line 578 of file fstream. References std::basic_ios< _CharT, _Traits >::setstate(). |
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Definition at line 61 of file basic_ios.tcc. References std::ios_base::_M_callbacks, std::ios_base::_M_word, std::ios_base::_M_word_size, std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_ios< _CharT, _Traits >::fill(), std::ios_base::flags(), std::ios_base::getloc(), std::ios_base::precision(), std::basic_ios< _CharT, _Traits >::tie(), and std::ios_base::width(). |
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Fast error checking.
Definition at line 165 of file basic_ios.h. |
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Throwing exceptions on errors.
If the error flage is already set when the exceptions mask is added, the exception is immediately thrown. Try running the following under GCC 3.1 or later: #include <iostream> #include <fstream> #include <exception> int main() { std::set_terminate (__gnu_cxx::__verbose_terminate_handler); std::ifstream f ("/etc/motd"); std::cerr << "Setting badbit\n"; f.setstate (std::ios_base::badbit); std::cerr << "Setting exception mask\n"; f.exceptions (std::ios_base::badbit); } Definition at line 232 of file basic_ios.h. |
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Throwing exceptions on errors.
Definition at line 197 of file basic_ios.h. Referenced by std::basic_ios< _CharT, _Traits >::clear(), std::basic_ios< _CharT, _Traits >::copyfmt(), std::basic_istream< _CharT, _Traits >::get(), std::basic_istream< _CharT, _Traits >::getline(), std::basic_istream< _CharT, _Traits >::ignore(), std::operator<<(), std::basic_ostream< _CharT, _Traits >::operator<<(), std::operator>>(), std::basic_istream< _CharT, _Traits >::operator>>(), std::basic_istream< _CharT, _Traits >::peek(), std::basic_istream< _CharT, _Traits >::putback(), std::basic_istream< _CharT, _Traits >::read(), std::basic_istream< _CharT, _Traits >::readsome(), std::basic_istream< _CharT, _Traits >::sync(), and std::basic_istream< _CharT, _Traits >::unget(). |
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Fast error checking.
Definition at line 176 of file basic_ios.h. Referenced by std::basic_ios< char, _Traits >::operator void *(), std::basic_ios< char, _Traits >::operator!(), std::basic_istream< _CharT, _Traits >::seekg(), std::basic_ostream< _CharT, _Traits >::seekp(), std::basic_istream< _CharT, _Traits >::tellg(), and std::basic_ostream< _CharT, _Traits >::tellp(). |
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Sets a new "empty" character.
Definition at line 348 of file basic_ios.h. |
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Retreives the "empty" character.
Definition at line 328 of file basic_ios.h. Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), std::basic_ios< char, _Traits >::fill(), std::operator<<(), and std::basic_ostream< _CharT, _Traits >::operator<<(). |
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Setting new format flags all at once.
Definition at line 484 of file ios_base.h. |
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Access to format flags.
Definition at line 474 of file ios_base.h. Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), std::basic_ostream< _CharT, _Traits >::operator<<(), std::basic_ostream< char >::operator<<(), std::basic_istream< _CharT, _Traits >::sentry::sentry(), and std::basic_ostream< _CharT, _Traits >::sentry::~sentry(). |
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Character counting.
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Extraction into another streambuf.
get (sb,widen('')). |
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Extraction into another streambuf.
If no characters are stored, failbit is set in the stream's error state. Definition at line 621 of file istream.tcc. References std::basic_istream< _CharT, _Traits >::char_type, std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_istream< _CharT, _Traits >::int_type, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Simple multiple-character extraction.
get (s,n,widen('')). |
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Simple multiple-character extraction.
If no characters are stored, failbit is set in the stream's error state. In any case, a null character is stored into the next location in the array.
Definition at line 579 of file istream.tcc. References std::basic_istream< _CharT, _Traits >::char_type, std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_istream< _CharT, _Traits >::int_type, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Simple extraction.
Definition at line 545 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_istream< _CharT, _Traits >::int_type, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Simple extraction.
Definition at line 513 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_istream< _CharT, _Traits >::int_type, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). Referenced by std::basic_istream< char >::get(), and std::operator>>(). |
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String extraction.
getline (s,n,widen('')). |
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String extraction.
If no characters are extracted, failbit is set. (An empty line of input should therefore not cause failbit to be set.) In any case, a null character is stored in the next location in the array. Definition at line 663 of file istream.tcc. References std::basic_istream< _CharT, _Traits >::char_type, std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_istream< _CharT, _Traits >::int_type, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). Referenced by std::basic_istream< char >::getline(). |
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Locale access.
imbue(loc) has previously been called, then this function returns loc . Otherwise, it returns a copy of std::locale() , the global C++ locale.
Definition at line 616 of file ios_base.h. Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), std::operator>>(), and std::ws(). |
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Fast error checking.
Definition at line 155 of file basic_ios.h. Referenced by std::basic_istream< _CharT, _Traits >::sentry::sentry(). |
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Discarding characters.
Definition at line 715 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_istream< _CharT, _Traits >::int_type, std::max(), std::min(), std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Moves to a new locale.
ios_base::imbue(loc) , and if a stream buffer is associated with this stream, calls that buffer's pubimbue(loc) .Additional l10n notes are at http://gcc.gnu.org/onlinedocs/libstdc++/22_locale/howto.html Reimplemented from std::ios_base. Definition at line 135 of file basic_ios.tcc. References std::basic_ios< _CharT, _Traits >::rdbuf(). |
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All setup is performed here. This is called from the public constructor. It is not virtual and cannot be redefined. The second argument, __cache, is used to initialize the standard streams without allocating memory. Definition at line 147 of file basic_ios.tcc. References std::ios_base::badbit, and std::ios_base::goodbit. Referenced by std::basic_fstream< _CharT, _Traits >::basic_fstream(), std::basic_ifstream< _CharT, _Traits >::basic_ifstream(), std::basic_ios< char, _Traits >::basic_ios(), std::basic_istream< char >::basic_istream(), std::basic_istringstream< _CharT, _Traits, _Alloc >::basic_istringstream(), std::basic_ofstream< _CharT, _Traits >::basic_ofstream(), std::basic_ostream< char >::basic_ostream(), std::basic_ostringstream< _CharT, _Traits, _Alloc >::basic_ostringstream(), and std::basic_stringstream< _CharT, _Traits, _Alloc >::basic_stringstream(). |
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Wrapper to test for an open file.
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Definition at line 629 of file ios_base.h. |
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Squeezes characters.
char_type to a character of char , if possible.Returns the result of std::use_facet< ctype<char_type> >(getloc()).narrow(c,dfault) Additional l10n notes are at http://gcc.gnu.org/onlinedocs/libstdc++/22_locale/howto.html Definition at line 114 of file basic_ios.tcc. Referenced by std::operator>>(). |
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Opens an external file.
std::basic_filebuf::open (s,mode|in). If that function fails, failbit is set in the stream's error state.Tip: When using std::string to hold the filename, you must use .c_str() before passing it to this constructor. Definition at line 565 of file fstream. References std::basic_ios< _CharT, _Traits >::setstate(). Referenced by std::basic_ifstream< _CharT, _Traits >::basic_ifstream(). |
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The quick-and-easy status check. This allows you to write constructs such as "if (!a_stream) ..." and "while (a_stream) ..." Definition at line 109 of file basic_ios.h. |
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The quick-and-easy status check. This allows you to write constructs such as "if (!a_stream) ..." and "while (a_stream) ..." Definition at line 113 of file basic_ios.h. |
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Extracting into another streambuf.
If sb is NULL, the stream will set failbit in its error state. Characters are extracted from this stream and inserted into the sb streambuf until one of the following occurs:
If the function inserts no characters, failbit is set. Definition at line 482 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 455 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 428 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 401 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 374 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 346 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 319 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 291 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 264 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 237 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 200 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 173 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 136 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Basic arithmetic extractors.
num_get facet) to parse the input data.
Definition at line 109 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Interface for manipulators.
Manuipulators such as Definition at line 100 of file istream.tcc. |
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Interface for manipulators.
Manuipulators such as Definition at line 91 of file istream.tcc. |
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Interface for manipulators.
Manuipulators such as Definition at line 82 of file istream.tcc. |
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Looking ahead in the stream.
good() is false, returns traits::eof() . Otherwise reads but does not extract the next input character.
Definition at line 753 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_istream< _CharT, _Traits >::int_type, and std::basic_ios< _CharT, _Traits >::rdbuf(). |
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Changing flags.
Definition at line 552 of file ios_base.h. |
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Flags access.
Definition at line 544 of file ios_base.h. Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(). |
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Unextracting a single character.
rdbuf() is not null, calls rdbuf()->sputbackc(c) .
If
Definition at line 842 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_istream< _CharT, _Traits >::int_type, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Definition at line 640 of file ios_base.h. |
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Changing the underlying buffer.
Due to historical accidents which the LWG refuses to correct, the I/O library suffers from a design error: this function is hidden in derived classes by overrides of the zero-argument Definition at line 51 of file basic_ios.tcc. References std::basic_ios< _CharT, _Traits >::clear(). |
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Accessing the underlying buffer.
Reimplemented from std::basic_ios< _CharT, _Traits >. |
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Returns the error state of the stream buffer.
Definition at line 125 of file basic_ios.h. Referenced by std::basic_ios< char, _Traits >::bad(), std::basic_ios< _CharT, _Traits >::clear(), std::basic_ios< char, _Traits >::eof(), std::basic_ios< char, _Traits >::fail(), and std::basic_ios< char, _Traits >::good(). |
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Extraction without delimiters.
good() , extracts characters and stores them into s until one of the following happens:
Definition at line 777 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Extraction until the buffer is exhausted, but no more.
rdbuf()->in_avail() , called A here:
The goal is to empty the current buffer, and to not request any more from the external input sequence controlled by the streambuf. Definition at line 806 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), std::min(), std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Changing the current read position.
fail() is not true, calls rdbuf()->pubseekoff(off,dir) . If that function fails, sets failbit.
Definition at line 976 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::fail(), std::basic_istream< _CharT, _Traits >::off_type, std::basic_istream< _CharT, _Traits >::pos_type, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Changing the current read position.
fail() is not true, calls rdbuf()->pubseekpos(pos) . If that function fails, sets failbit.
Definition at line 956 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::fail(), std::basic_istream< _CharT, _Traits >::off_type, std::basic_istream< _CharT, _Traits >::pos_type, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Setting new format flags.
& mask. An example mask is ios_base::adjustfield .
Definition at line 517 of file ios_base.h. |
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Setting new format flags.
Definition at line 500 of file ios_base.h. Referenced by std::boolalpha(), std::dec(), std::fixed(), std::hex(), std::internal(), std::left(), std::oct(), std::right(), std::scientific(), std::showbase(), std::showpoint(), std::showpos(), std::skipws(), std::unitbuf(), and std::uppercase(). |
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Synchronizing the stream buffer.
rdbuf() is a null pointer, returns -1.
Otherwise, calls Otherwise, returns 0.
Definition at line 910 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Interaction with the standard C I/O objects.
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Getting the current read position.
fail() is not false, returns pos_type (-1) to indicate failure. Otherwise returns rdbuf()->pubseekoff(0,cur,in) .
Definition at line 943 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::fail(), std::basic_istream< _CharT, _Traits >::pos_type, and std::basic_ios< _CharT, _Traits >::rdbuf(). |
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Ties this stream to an output stream.
Definition at line 280 of file basic_ios.h. |
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Fetches the current tied stream.
std::cin is tied to std::cout .
Definition at line 268 of file basic_ios.h. Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), and std::basic_istream< _CharT, _Traits >::sentry::sentry(). |
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Unextracting the previous character.
rdbuf() is not null, calls rdbuf()->sungetc(c) .
If
Definition at line 876 of file istream.tcc. References std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_istream< _CharT, _Traits >::int_type, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate(). |
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Clearing format flags.
Definition at line 532 of file ios_base.h. Referenced by std::noboolalpha(), std::noshowbase(), std::noshowpoint(), std::noshowpos(), std::noskipws(), std::nounitbuf(), and std::nouppercase(). |
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Widens characters.
char to a character of char_type .Returns the result of std::use_facet< ctype<char_type> >(getloc()).widen(c) Additional l10n notes are at http://gcc.gnu.org/onlinedocs/libstdc++/22_locale/howto.html Definition at line 124 of file basic_ios.tcc. References std::basic_ios< _CharT, _Traits >::char_type. Referenced by std::endl(), std::basic_ios< char, _Traits >::fill(), and std::operator<<(). |
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Changing flags.
Definition at line 574 of file ios_base.h. |
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Flags access.
Definition at line 566 of file ios_base.h. Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), std::operator<<(), and std::operator>>(). |
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A mask of left|right|internal. Useful for the 2-arg form of
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Seek to end before each write.
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Open and seek to end immediately after opening.
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Indicates a loss of integrity in an input or output sequence (such as an irrecoverable read error from a file).
Definition at line 134 of file ios.cc. Referenced by std::basic_ios< char, _Traits >::bad(), std::basic_ios< _CharT, _Traits >::clear(), std::basic_ios< char, _Traits >::fail(), and std::basic_ios< _CharT, _Traits >::init(). |
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A mask of dec|oct|hex. Useful for the 2-arg form of
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Request a seek relative to the beginning of the stream.
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Perform input and output in binary mode (as opposed to text mode). This is probably not what you think it is; see http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#3 and http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#7 for more.
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Insert/extract
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Request a seek relative to the current position within the sequence.
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Converts integer input or generates integer output in decimal base.
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Request a seek relative to the current end of the sequence.
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Indicates that an input operation reached the end of an input sequence.
Definition at line 135 of file ios.cc. Referenced by std::basic_ios< char, _Traits >::eof(). |
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Indicates that an input operation failed to read the expected characters, or that an output operation failed to generate the desired characters.
Definition at line 136 of file ios.cc. Referenced by std::basic_ios< char, _Traits >::fail(). |
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Generate floating-point output in fixed-point notation.
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A mask of scientific|fixed. Useful for the 2-arg form of
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Indicates all is well.
Definition at line 137 of file ios.cc. Referenced by std::basic_ios< _CharT, _Traits >::init(). |
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Converts integer input or generates integer output in hexadecimal base.
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Open for input. Default for
Definition at line 142 of file ios.cc. Referenced by std::basic_istringstream< _CharT, _Traits, _Alloc >::basic_istringstream(). |
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Adds fill characters at a designated internal point in certain generated output, or identical to
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Adds fill characters on the right (final positions) of certain generated output. (I.e., the thing you print is flush left.).
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Converts integer input or generates integer output in octal base.
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Open for output. Default for
Definition at line 143 of file ios.cc. Referenced by std::basic_ostringstream< _CharT, _Traits, _Alloc >::basic_ostringstream(). |
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Adds fill characters on the left (initial positions) of certain generated output. (I.e., the thing you print is flush right.).
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Generates floating-point output in scientific notation.
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Generates a prefix indicating the numeric base of generated integer output.
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Generates a decimal-point character unconditionally in generated floating-point output.
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Generates a + sign in non-negative generated numeric output.
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Skips leading white space before certain input operations.
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Open for input. Default for
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Flushes output after each output operation.
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Replaces certain lowercase letters with their uppercase equivalents in generated output.
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