std::regex_traits< _Ch_type > Struct Template Reference
[Regular Expressions]

Describes aspects of a regular expression. More...

List of all members.

Public Types

Public Member Functions

Static Public Member Functions

Protected Attributes


Detailed Description

template<typename _Ch_type>
struct std::regex_traits< _Ch_type >

Describes aspects of a regular expression.

A regular expression traits class that satisfies the requirements of tr1 section [7.2].

The class regex is parameterized around a set of related types and functions used to complete the definition of its semantics. This class satisfies the requirements of such a traits class.

Definition at line 432 of file tr1_impl/regex.


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.

Definition at line 633 of file tr1_impl/regex.

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.

Definition at line 458 of file tr1_impl/regex.

References std::basic_string< _CharT, _Traits, _Alloc >::length().

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 [inline]

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
  • print
  • punct
  • space
  • upper
  • xdigit

Todo:
Implement this function.

Referenced by std::regex_traits< _Ch_type >::isctype().

template<typename _Ch_type >
template<typename _Fwd_iter >
string_type std::regex_traits< _Ch_type >::lookup_collatename ( _Fwd_iter  __first,
_Fwd_iter  __last 
) const [inline]

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.

Definition at line 511 of file tr1_impl/regex.

References std::basic_string< _CharT, _Traits, _Alloc >::data(), std::basic_string< _CharT, _Traits, _Alloc >::size(), std::collate< _CharT >::transform(), and std::use_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 [inline]

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.

Definition at line 469 of file tr1_impl/regex.

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.

Definition at line 482 of file tr1_impl/regex.

References std::tolower(), and std::use_facet().


The documentation for this struct was generated from the following file:

Generated on Thu Jul 23 21:18:08 2009 for libstdc++ by  doxygen 1.5.8