std::basic_stringbuf<CharT,Traits,Allocator>::pbackfail

This protected virtual function is called by the public functions basic_streambuf::sungetc and basic_streambuf::sputbackc (which, in turn, are called by basic_istream::unget and basic_istream::putback).

# Declarations

protected:
virtual int_type pbackfail( int_type c = Traits::eof() )

# Parameters

• c: the character to put back, or Traits::eof() to indicate that backing up of the get area is requested

# Return value

c on success except if c was Traits::eof(), in which case Traits::not_eof(c) is returned.

# Example

This section is incompleteReason: no example

# See also

• pbackfail
• sungetc
• sputbackc
• unget
• putback