| std::regex_traits< _Ch_type >(3cxx) | std::regex_traits< _Ch_type >(3cxx) |
NAME¶
std::regex_traits< _Ch_type > -SYNOPSIS¶
Public Types¶
typedef std::ctype_base::mask char_class_type
Public Member Functions¶
locale_type getloc () const
Static Public Member Functions¶
static std::size_t length (const char_type *__p)
Protected Attributes¶
locale_type _M_locale
Detailed Description¶
template<typename _Ch_type>struct std::regex_traits< _Ch_type >¶
Describes aspects of a regular expression.Constructor & Destructor Documentation¶
template<typename _Ch_type > std::regex_traits< _Ch_type >:: regex_traits () [inline]¶
Constructs a default traits object. Definition at line 444 of file tr1_impl/regex.Member Function Documentation¶
template<typename _Ch_type > locale_type std::regex_traits< _Ch_type >::getloc () const [inline]¶
Gets a copy of the current locale in use by the regex_traits object. Definition at line 644 of file tr1_impl/regex.template<typename _Ch_type > locale_type std::regex_traits< _Ch_type >::imbue ( locale_type__loc) [inline]¶
Imbues the regex_traits object with a copy of a new locale. Parameters:loc A locale.
Returns:
a copy of the previous locale in use by the
regex_traits object.
Note:
Calling imbue with a different locale than the
one currently in use invalidates all cached data held by *this.
template<typename _Ch_type > static std::size_t std::regex_traits< _Ch_type >::length (const char_type *__p) [inline], [static]¶
Gives the length of a C-style string starting at __p. Parameters:__p a pointer to the start of a
character sequence.
Returns:
the number of characters between *__p and the
first default-initialized value of type char_type. In other words, uses the
C-string algorithm for determining the length of a sequence of
characters.
template<typename _Ch_type > template<typename _Fwd_iter > char_class_type std::regex_traits< _Ch_type >::lookup_classname (_Fwd_iter__first, _Fwd_iter__last) const¶
Maps one or more characters to a named character classification. Parameters:first beginning of the character
sequence.
last one-past-the-end of the character sequence.
Returns:
an unspecified value that represents the
character classification named by the character sequence designated by the
iterator range [first, last). The value returned shall be independent of the
case of the characters in the character sequence. If the name is not
recognized then returns a value that compares equal to 0.
At least the following names (or their wide-character equivalent) are supported.
- •
- d
- •
- w
- •
- s
- •
- alnum
- •
- alpha
- •
- blank
- •
- cntrl
- •
- digit
- •
- graph
- •
- lower
- •
- •
- punct
- •
- space
- •
- upper
- •
- xdigit
Implement this function.
template<typename _Ch_type > template<typename _Fwd_iter > string_type std::regex_traits< _Ch_type >::lookup_collatename (_Fwd_iter__first, _Fwd_iter__last) const¶
Gets a collation element by name. Parameters:first beginning of the collation
element name.
last one-past-the-end of the collation element name.
Returns:
a sequence of one or more characters that
represents the collating element consisting of the character sequence
designated by the iterator range [first, last). Returns an empty string if the
character sequence is not a valid collating element.
Todo
Implement this function.
template<typename _Ch_type > template<typename _Fwd_iter > string_type std::regex_traits< _Ch_type >::transform (_Fwd_iter__first, _Fwd_iter__last) const [inline]¶
Gets a sort key for a character sequence. Parameters:first beginning of the character
sequence.
last one-past-the-end of the character sequence.
Returns a sort key for the character sequence designated by the iterator range
[F1, F2) such that if the character sequence [G1, G2) sorts before the
character sequence [H1, H2) then v.transform(G1, G2) < v.transform(H1, H2).
What this really does is provide a more efficient way to compare a string to
multiple other strings in locales with fancy collation rules and equivalence
classes.
Returns:
a locale-specific sort key equivalent to the
input range.
Exceptions:
std::bad_cast if the
current locale does not have a collate facet.
template<typename _Ch_type > template<typename _Fwd_iter > string_type std::regex_traits< _Ch_type >::transform_primary (_Fwd_iter__first, _Fwd_iter__last) const¶
Dunno. Parameters:first beginning of the character
sequence.
last one-past-the-end of the character sequence.
Effects: if typeid(use_facet<collate<_Ch_type> >) ==
typeid(collate_byname<_Ch_type>) and the form of the sort key returned
by collate_byname<_Ch_type>::transform(first, last) is known and can be
converted into a primary sort key then returns that key, otherwise returns an
empty string. WTF??
Todo
Implement this function.
template<typename _Ch_type > char_type std::regex_traits< _Ch_type >::translate (char_type__c) const [inline]¶
Performs the identity translation. Parameters:c A character to the locale-specific
character set.
Returns:
c.
template<typename _Ch_type > char_type std::regex_traits< _Ch_type >::translate_nocase (char_type__c) const [inline]¶
Translates a character into a case-insensitive equivalent. Parameters:c A character to the locale-specific
character set.
Returns:
the locale-specific lower-case equivalent of
c.
Exceptions:
std::bad_cast if the
imbued locale does not support the ctype facet.
Author¶
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