std::num_get - Man Page

typedef _CharT char_type
Public typedefs.
typedef _InIter iter_type
Public typedefs.

num_get (size_t __refs=0)
Constructor performs initialization.
template<typename _ValueT > _InIter _M_extract_int (_InIter __beg, _InIter __end, ios_base &__io, ios_base::iostate &__err, _ValueT &__v) const
iter_type get (iter_type __in, iter_type __end, ios_base &__io, ios_base::iostate &__err, bool &__v) const
Numeric parsing.
iter_type get (iter_type __in, iter_type __end, ios_base &__io, ios_base::iostate &__err, void *&__v) const
Numeric parsing.

iter_type get (iter_type __in, iter_type __end, ios_base &__io, ios_base::iostate &__err, long &__v) const
Numeric parsing.
iter_type get (iter_type __in, iter_type __end, ios_base &__io, ios_base::iostate &__err, unsigned short &__v) const
Numeric parsing.
iter_type get (iter_type __in, iter_type __end, ios_base &__io, ios_base::iostate &__err, unsigned int &__v) const
Numeric parsing.
iter_type get (iter_type __in, iter_type __end, ios_base &__io, ios_base::iostate &__err, unsigned long &__v) const
Numeric parsing.
iter_type get (iter_type __in, iter_type __end, ios_base &__io, ios_base::iostate &__err, long long &__v) const
Numeric parsing.
iter_type get (iter_type __in, iter_type __end, ios_base &__io, ios_base::iostate &__err, unsigned long long &__v) const
Numeric parsing.

iter_type get (iter_type __in, iter_type __end, ios_base &__io, ios_base::iostate &__err, float &__v) const
Numeric parsing.
iter_type get (iter_type __in, iter_type __end, ios_base &__io, ios_base::iostate &__err, double &__v) const
Numeric parsing.
iter_type get (iter_type __in, iter_type __end, ios_base &__io, ios_base::iostate &__err, long double &__v) const
Numeric parsing.

static locale::id id
Numpunct facet id.

virtual ~num_get ()
Destructor.
iter_type _M_extract_float (iter_type, iter_type, ios_base &, ios_base::iostate &, string &) const
template<typename _ValueT > iter_type _M_extract_int (iter_type, iter_type, ios_base &, ios_base::iostate &, _ValueT &) const
template<typename _CharT2 > __gnu_cxx::__enable_if< __is_char< _CharT2 >::__value, int >::__type _M_find (const _CharT2 *, size_t __len, _CharT2 __c) const
template<typename _CharT2 > __gnu_cxx::__enable_if<!__is_char< _CharT2 >::__value, int >::__type _M_find (const _CharT2 *__zero, size_t __len, _CharT2 __c) const

virtual iter_type do_get (iter_type, iter_type, ios_base &, ios_base::iostate &, bool &) const
Numeric parsing.
virtual iter_type do_get (iter_type __beg, iter_type __end, ios_base &__io, ios_base::iostate &__err, long &__v) const
Numeric parsing.
virtual iter_type do_get (iter_type __beg, iter_type __end, ios_base &__io, ios_base::iostate &__err, unsigned short &__v) const
Numeric parsing.
virtual iter_type do_get (iter_type __beg, iter_type __end, ios_base &__io, ios_base::iostate &__err, unsigned int &__v) const
Numeric parsing.
virtual iter_type do_get (iter_type __beg, iter_type __end, ios_base &__io, ios_base::iostate &__err, unsigned long &__v) const
Numeric parsing.
virtual iter_type do_get (iter_type __beg, iter_type __end, ios_base &__io, ios_base::iostate &__err, long long &__v) const
Numeric parsing.
virtual iter_type do_get (iter_type __beg, iter_type __end, ios_base &__io, ios_base::iostate &__err, unsigned long long &__v) const
Numeric parsing.
virtual iter_type do_get (iter_type, iter_type, ios_base &, ios_base::iostate &, float &) const
Numeric parsing.
virtual iter_type do_get (iter_type, iter_type, ios_base &, ios_base::iostate &, double &) const
Numeric parsing.
virtual iter_type do_get (iter_type, iter_type, ios_base &, ios_base::iostate &, long double &) const
Numeric parsing.
virtual iter_type do_get (iter_type, iter_type, ios_base &, ios_base::iostate &, void *&) const
Numeric parsing.

static __c_locale _S_clone_c_locale (__c_locale &__cloc)  throw ()
static void _S_create_c_locale (__c_locale &__cloc, const char *__s, __c_locale __old=0)
static void _S_destroy_c_locale (__c_locale &__cloc)
static __c_locale _S_get_c_locale ()
static const char * _S_get_c_name ()  throw ()
static __c_locale _S_lc_ctype_c_locale (__c_locale __cloc, const char *__s)

class std::num_get< _CharT, _InIter >"Primary class template num_get.

This facet encapsulates the code to parse and return a number from a string. It is used by the istream numeric extraction operators.

The num_get template uses protected virtual functions to provide the actual results. The public accessors forward the call to the virtual functions. These virtual functions are hooks for developers to implement the behavior they require from the num_get facet.

Public typedefs.

Public typedefs.

Constructor performs initialization. This is the constructor provided by the standard.

Parameters

Destructor.

Numeric parsing. Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.

See also

get() for more details.

Parameters

Returns

Iterator after reading.

Numeric parsing. Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.

See also

get() for more details.

Parameters

Returns

Iterator after reading.

Numeric parsing. Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.

See also

get() for more details.

Parameters

Returns

Iterator after reading.

Numeric parsing. Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.

See also

get() for more details.

Parameters

Returns

Iterator after reading.

Numeric parsing. Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.

See also

get() for more details.

Parameters

Returns

Iterator after reading.

Numeric parsing. Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.

See also

get() for more details.

Parameters

Returns

Iterator after reading.

Numeric parsing. Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.

See also

get() for more details.

Parameters

Returns

Iterator after reading.

References std::ios_base::_M_getloc(), std::ios_base::boolalpha, std::ios_base::eofbit, std::ios_base::failbit, std::ios_base::flags(), and std::ios_base::goodbit.

Referenced by std::num_get< _CharT, _InIter >::get(), std::num_get< _CharT, _InIter >::get(), std::num_get< _CharT, _InIter >::get(), std::num_get< _CharT, _InIter >::get(), std::num_get< _CharT, _InIter >::get(), std::num_get< _CharT, _InIter >::get(), std::num_get< _CharT, _InIter >::get(), std::num_get< _CharT, _InIter >::get(), std::num_get< _CharT, _InIter >::get(), std::num_get< _CharT, _InIter >::get(), and std::num_get< _CharT, _InIter >::get().

Numeric parsing. Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.

See also

get() for more details.

Parameters

Returns

Iterator after reading.

References std::basic_string< _CharT, _Traits, _Alloc >::c_str(), std::ios_base::eofbit, and std::basic_string< _CharT, _Traits, _Alloc >::reserve().

Numeric parsing. Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.

See also

get() for more details.

Parameters

Returns

Iterator after reading.

References std::basic_string< _CharT, _Traits, _Alloc >::c_str(), std::ios_base::eofbit, and std::basic_string< _CharT, _Traits, _Alloc >::reserve().

Numeric parsing. Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.

See also

get() for more details.

Parameters

Returns

Iterator after reading.

References std::basic_string< _CharT, _Traits, _Alloc >::c_str(), std::ios_base::eofbit, and std::basic_string< _CharT, _Traits, _Alloc >::reserve().

Numeric parsing. Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.

See also

get() for more details.

Parameters

Returns

Iterator after reading.

References std::ios_base::basefield, std::ios_base::flags(), and std::ios_base::hex.

Numeric parsing. Parses the input stream into the bool v. It does so by calling num_get::do_get().

If ios_base::boolalpha is set, attempts to read ctype<CharT>::truename() or ctype<CharT>::falsename(). Sets v to true or false if successful. Sets err to ios_base::failbit if reading the string fails. Sets err to ios_base::eofbit if the stream is emptied.

If ios_base::boolalpha is not set, proceeds as with reading a long, except if the value is 1, sets v to true, if the value is 0, sets v to false, and otherwise set err to ios_base::failbit.

Parameters

Returns

Iterator after reading.

References std::num_get< _CharT, _InIter >::do_get().

Referenced by std::basic_istream< _CharT, _Traits >::operator>>().

Numeric parsing. Parses the input stream into the integral variable v. It does so by calling num_get::do_get().

The input characters are parsed like the scanf g specifier. The matching type length modifier is also used.

The decimal point character used is numpunct::decimal_point(). Digit grouping is interpreted according to numpunct::grouping() and numpunct::thousands_sep(). If the pattern of digit groups isn't consistent, sets err to ios_base::failbit.

If parsing the string yields a valid value for v, v is set. Otherwise, sets err to ios_base::failbit and leaves v unaltered. Sets err to ios_base::eofbit if the stream is emptied.

Parameters

Returns

Iterator after reading.

References std::num_get< _CharT, _InIter >::do_get().

Numeric parsing. Parses the input stream into the integral variable v. It does so by calling num_get::do_get().

The input characters are parsed like the scanf g specifier. The matching type length modifier is also used.

The decimal point character used is numpunct::decimal_point(). Digit grouping is interpreted according to numpunct::grouping() and numpunct::thousands_sep(). If the pattern of digit groups isn't consistent, sets err to ios_base::failbit.

If parsing the string yields a valid value for v, v is set. Otherwise, sets err to ios_base::failbit and leaves v unaltered. Sets err to ios_base::eofbit if the stream is emptied.

Parameters

Returns

Iterator after reading.

References std::num_get< _CharT, _InIter >::do_get().

Numeric parsing. Parses the input stream into the integral variable v. It does so by calling num_get::do_get().

Parsing is affected by the flag settings in io.

The basic parse is affected by the value of io.flags() & ios_base::basefield. If equal to ios_base::oct, parses like the scanf o specifier. Else if equal to ios_base::hex, parses like X specifier. Else if basefield equal to 0, parses like the i specifier. Otherwise, parses like d for signed and u for unsigned types. The matching type length modifier is also used.

Digit grouping is interpreted according to numpunct::grouping() and numpunct::thousands_sep(). If the pattern of digit groups isn't consistent, sets err to ios_base::failbit.

If parsing the string yields a valid value for v, v is set. Otherwise, sets err to ios_base::failbit and leaves v unaltered. Sets err to ios_base::eofbit if the stream is emptied.

Parameters

Returns

Iterator after reading.

References std::num_get< _CharT, _InIter >::do_get().

Numeric parsing. Parses the input stream into the integral variable v. It does so by calling num_get::do_get().

The input characters are parsed like the scanf g specifier. The matching type length modifier is also used.

The decimal point character used is numpunct::decimal_point(). Digit grouping is interpreted according to numpunct::grouping() and numpunct::thousands_sep(). If the pattern of digit groups isn't consistent, sets err to ios_base::failbit.

If parsing the string yields a valid value for v, v is set. Otherwise, sets err to ios_base::failbit and leaves v unaltered. Sets err to ios_base::eofbit if the stream is emptied.

Parameters

Returns

Iterator after reading.

References std::num_get< _CharT, _InIter >::do_get().

Numeric parsing. Parses the input stream into the integral variable v. It does so by calling num_get::do_get().

Parsing is affected by the flag settings in io.

The basic parse is affected by the value of io.flags() & ios_base::basefield. If equal to ios_base::oct, parses like the scanf o specifier. Else if equal to ios_base::hex, parses like X specifier. Else if basefield equal to 0, parses like the i specifier. Otherwise, parses like d for signed and u for unsigned types. The matching type length modifier is also used.

Digit grouping is interpreted according to numpunct::grouping() and numpunct::thousands_sep(). If the pattern of digit groups isn't consistent, sets err to ios_base::failbit.

If parsing the string yields a valid value for v, v is set. Otherwise, sets err to ios_base::failbit and leaves v unaltered. Sets err to ios_base::eofbit if the stream is emptied.

Parameters

Returns

Iterator after reading.

References std::num_get< _CharT, _InIter >::do_get().

Numeric parsing. Parses the input stream into the integral variable v. It does so by calling num_get::do_get().

Parsing is affected by the flag settings in io.

The basic parse is affected by the value of io.flags() & ios_base::basefield. If equal to ios_base::oct, parses like the scanf o specifier. Else if equal to ios_base::hex, parses like X specifier. Else if basefield equal to 0, parses like the i specifier. Otherwise, parses like d for signed and u for unsigned types. The matching type length modifier is also used.

Digit grouping is interpreted according to numpunct::grouping() and numpunct::thousands_sep(). If the pattern of digit groups isn't consistent, sets err to ios_base::failbit.

If parsing the string yields a valid value for v, v is set. Otherwise, sets err to ios_base::failbit and leaves v unaltered. Sets err to ios_base::eofbit if the stream is emptied.

Parameters

Returns

Iterator after reading.

References std::num_get< _CharT, _InIter >::do_get().

Numeric parsing. Parses the input stream into the integral variable v. It does so by calling num_get::do_get().

Parsing is affected by the flag settings in io.

The basic parse is affected by the value of io.flags() & ios_base::basefield. If equal to ios_base::oct, parses like the scanf o specifier. Else if equal to ios_base::hex, parses like X specifier. Else if basefield equal to 0, parses like the i specifier. Otherwise, parses like d for signed and u for unsigned types. The matching type length modifier is also used.

Digit grouping is interpreted according to numpunct::grouping() and numpunct::thousands_sep(). If the pattern of digit groups isn't consistent, sets err to ios_base::failbit.

If parsing the string yields a valid value for v, v is set. Otherwise, sets err to ios_base::failbit and leaves v unaltered. Sets err to ios_base::eofbit if the stream is emptied.

Parameters

Returns

Iterator after reading.

References std::num_get< _CharT, _InIter >::do_get().

Numeric parsing. Parses the input stream into the integral variable v. It does so by calling num_get::do_get().

Parsing is affected by the flag settings in io.

The basic parse is affected by the value of io.flags() & ios_base::basefield. If equal to ios_base::oct, parses like the scanf o specifier. Else if equal to ios_base::hex, parses like X specifier. Else if basefield equal to 0, parses like the i specifier. Otherwise, parses like d for signed and u for unsigned types. The matching type length modifier is also used.

Digit grouping is interpreted according to numpunct::grouping() and numpunct::thousands_sep(). If the pattern of digit groups isn't consistent, sets err to ios_base::failbit.

If parsing the string yields a valid value for v, v is set. Otherwise, sets err to ios_base::failbit and leaves v unaltered. Sets err to ios_base::eofbit if the stream is emptied.

Parameters

Returns

Iterator after reading.

References std::num_get< _CharT, _InIter >::do_get().

Numeric parsing. Parses the input stream into the integral variable v. It does so by calling num_get::do_get().

Parsing is affected by the flag settings in io.

The basic parse is affected by the value of io.flags() & ios_base::basefield. If equal to ios_base::oct, parses like the scanf o specifier. Else if equal to ios_base::hex, parses like X specifier. Else if basefield equal to 0, parses like the i specifier. Otherwise, parses like d for signed and u for unsigned types. The matching type length modifier is also used.

Digit grouping is interpreted according to numpunct::grouping() and numpunct::thousands_sep(). If the pattern of digit groups isn't consistent, sets err to ios_base::failbit.

If parsing the string yields a valid value for v, v is set. Otherwise, sets err to ios_base::failbit and leaves v unaltered. Sets err to ios_base::eofbit if the stream is emptied.

Parameters

Returns

Iterator after reading.

References std::num_get< _CharT, _InIter >::do_get().

Numeric parsing. Parses the input stream into the pointer variable v. It does so by calling num_get::do_get().

The input characters are parsed like the scanf p specifier.

Digit grouping is interpreted according to numpunct::grouping() and numpunct::thousands_sep(). If the pattern of digit groups isn't consistent, sets err to ios_base::failbit.

Note that the digit grouping effect for pointers is a bit ambiguous in the standard and shouldn't be relied on. See DR 344.

If parsing the string yields a valid value for v, v is set. Otherwise, sets err to ios_base::failbit and leaves v unaltered. Sets err to ios_base::eofbit if the stream is emptied.

Parameters

Returns

Iterator after reading.

References std::num_get< _CharT, _InIter >::do_get().

Numpunct facet id.