__gnu_cxx::char_traits< _CharT >

Section: C Library Functions (3)
Updated: Wed Apr 17 2019
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NAME

__gnu_cxx::char_traits< _CharT > - Base class used to implement std::char_traits.

SYNOPSIS

Inherited by std::char_traits< _CharT >.

Public Types

typedef _CharT char_type

typedef _Char_types< _CharT >::int_type int_type

typedef _Char_types< _CharT >::off_type off_type

typedef _Char_types< _CharT >::pos_type pos_type

typedef _Char_types< _CharT >::state_type state_type

Static Public Member Functions

static _GLIBCXX14_CONSTEXPR void assign (char_type &__c1, const char_type &__c2)

static char_type * assign (char_type *__s, std::size_t __n, char_type __a)

static _GLIBCXX14_CONSTEXPR int compare (const char_type *__s1, const char_type *__s2, std::size_t __n)

static char_type * copy (char_type *__s1, const char_type *__s2, std::size_t __n)

static constexpr int_type eof ()

static constexpr bool eq (const char_type &__c1, const char_type &__c2)

static constexpr bool eq_int_type (const int_type &__c1, const int_type &__c2)

static _GLIBCXX14_CONSTEXPR const char_type * find (const char_type *__s, std::size_t __n, const char_type &__a)

static _GLIBCXX14_CONSTEXPR std::size_t length (const char_type *__s)

static constexpr bool lt (const char_type &__c1, const char_type &__c2)

static char_type * move (char_type *__s1, const char_type *__s2, std::size_t __n)

static constexpr int_type not_eof (const int_type &__c)

static constexpr char_type to_char_type (const int_type &__c)

static constexpr int_type to_int_type (const char_type &__c)

Detailed Description

template<typename _CharT>

struct __gnu_cxx::char_traits< _CharT >" Base class used to implement std::char_traits.

Note:

: For any given actual character type, this definition is probably wrong. (Most of the member functions are likely to be right, but the int_type and state_type typedefs, and the eof() member function, are likely to be wrong.) The reason this class exists is so users can specialize it. Classes in namespace std may not be specialized for fundamental types, but classes in namespace __gnu_cxx may be.

See https://gcc.gnu.org/onlinedocs/libstdc++/manual/strings.html#strings.string.character_types for advice on how to make use of this class for unusual character types. Also, check out include/ext/pod_char_traits.h.

Definition at line 87 of file char_traits.h.

Author

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