std::char_traits<CharT>::not_eof

 

C++

Compiler support

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Standard library headers

Named requirements

Feature test macros (C++20)

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Concepts library (C++20)

Metaprogramming library (C++11)

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Technical specifications

Symbols index

External libraries

 

Strings library

Null-terminated strings

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Classes

basic_string

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char_traits

 

std::char_traits

Member functions

char_traits::assign

char_traits::eqchar_traits::lt

char_traits::move

char_traits::copy

char_traits::compare

char_traits::length

char_traits::find

char_traits::to_char_type

char_traits::to_int_type

char_traits::eq_int_type

char_traits::eof

char_traits::not_eof

 

static int_type not_eof( int_type e );		(until C++11)
static constexpr int_type not_eof( int_type e ) noexcept;		(since C++11)

Given e, produce a suitable value that is not equivalent to eof.

Formally

• if X::eq_int_type(e, X::eof()) is false, returns e
• otherwise, returns a value f such that X::eq_int_type(f, X::eof()) is false

This function is typically used when a value other than eof needs to be returned, such as in implementations of std::basic_streambuf::overflow().

Parameters

e

-

value to analyze

Return value

e if e and eof value are not equivalent, returns some other non-eof value otherwise.

Complexity

Constant.

See also

eof [static]

returns an eof value (public static member function)