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.
Definition at line 1932 of file locale_facets.h.
typedef _CharT std::num_get< _CharT, _InIter >::char_type |
typedef _InIter std::num_get< _CharT, _InIter >::iter_type |
std::num_get< _CharT, _InIter >::num_get | ( | size_t | __refs = 0 |
) | [inline, explicit] |
Constructor performs initialization.
This is the constructor provided by the standard.
refs | Passed to the base facet class. |
Definition at line 1953 of file locale_facets.h.
virtual std::num_get< _CharT, _InIter >::~num_get | ( | ) | [inline, protected, virtual] |
_InIter std::num_get< _CharT, _InIter >::do_get | ( | iter_type | , | |
iter_type | , | |||
ios_base & | , | |||
ios_base::iostate & | , | |||
bool & | ||||
) | const [protected, virtual] |
Numeric parsing.
Parses the input stream into the variable v. This function is a hook for derived classes to change the value returned.
in | Start of input stream. | |
end | End of input stream. | |
io | Source of locale and flags. | |
err | Error flags to set. | |
v | Value to format and insert. |
Definition at line 717 of file locale_facets.tcc.
References std::num_get< _CharT, _InIter >::_M_extract_int(), std::ios_base::_M_getloc(), std::ios_base::boolalpha, std::ios_base::eofbit, std::ios_base::failbit, and std::ios_base::flags().
Referenced by std::num_get< _CharT, _InIter >::get().
iter_type std::num_get< _CharT, _InIter >::get | ( | iter_type | __in, | |
iter_type | __end, | |||
ios_base & | __io, | |||
ios_base::iostate & | __err, | |||
void *& | __v | |||
) | const [inline] |
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 intrepreted 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.
in | Start of input stream. | |
end | End of input stream. | |
io | Source of locale and flags. | |
err | Error flags to set. | |
v | Value to format and insert. |
Definition at line 2116 of file locale_facets.h.
References std::num_get< _CharT, _InIter >::do_get().
iter_type std::num_get< _CharT, _InIter >::get | ( | iter_type | __in, | |
iter_type | __end, | |||
ios_base & | __io, | |||
ios_base::iostate & | __err, | |||
float & | __v | |||
) | const [inline] |
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 intrepreted 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.
in | Start of input stream. | |
end | End of input stream. | |
io | Source of locale and flags. | |
err | Error flags to set. | |
v | Value to format and insert. |
Definition at line 2074 of file locale_facets.h.
References std::num_get< _CharT, _InIter >::do_get().
iter_type std::num_get< _CharT, _InIter >::get | ( | iter_type | __in, | |
iter_type | __end, | |||
ios_base & | __io, | |||
ios_base::iostate & | __err, | |||
long & | __v | |||
) | const [inline] |
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 intrepreted 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.
in | Start of input stream. | |
end | End of input stream. | |
io | Source of locale and flags. | |
err | Error flags to set. | |
v | Value to format and insert. |
Definition at line 2015 of file locale_facets.h.
References std::num_get< _CharT, _InIter >::do_get().
iter_type std::num_get< _CharT, _InIter >::get | ( | iter_type | __in, | |
iter_type | __end, | |||
ios_base & | __io, | |||
ios_base::iostate & | __err, | |||
bool & | __v | |||
) | const [inline] |
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.
in | Start of input stream. | |
end | End of input stream. | |
io | Source of locale and flags. | |
err | Error flags to set. | |
v | Value to format and insert. |
Definition at line 1979 of file locale_facets.h.
References std::num_get< _CharT, _InIter >::do_get().
Referenced by std::basic_istream< _CharT, _Traits >::_M_extract().
locale::id std::num_get< _CharT, _InIter >::id [static] |