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From: "tom at kera dot name" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/52169] the ifstream readsome() method does not signal any bit on eof.
Date: Wed, 08 Feb 2012 10:40:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D52169

Tomalak Geret'kal <tom at kera dot name> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tom at kera dot name

--- Comment #1 from Tomalak Geret'kal <tom at kera dot name> 2012-02-08 10:=
39:54 UTC ---
cplusplus.com is (a) not authoritative, (b) full of mistakes, and (c) other=
wise
just awful.

Instead, we'll quote the standard(s):

[C++11: 27.7.2.3]:
      streamsize readsome(char_type* s, streamsize n);
32/ Effects: Behaves as an unformatted input function (as described in
27.7.2.3, paragraph 1). After constructing a sentry object, if !good() calls
setstate(failbit) which may throw an exception, and return. Otherwise extra=
cts
characters and stores them into successive locations of an array whose first
element is designated by s. If rdbuf()->in_avail() =3D=3D -1, calls
setstate(eofbit) (which may throw ios_base::failure (27.5.5.4)), and extrac=
ts
no characters;
=E2=80=94 If rdbuf()->in_avail() =3D=3D 0, extracts no characters
=E2=80=94 If rdbuf()->in_avail() > 0, extracts min(rdbuf()->in_avail(),n)).
33/ Returns: The number of characters extracted.

[C++03: 27.6.1.3]:
      streamsize readsome(char_type* s, streamsize n);
30/ Effects: Behaves as an unformatted input function (as described in
27.6.1.3, paragraph 1). After constructing a sentry object, if !good() calls
setstate(failbit) which may throw an exception, and return. Otherwise extra=
cts
characters and stores them into successive locations of an array whose first
element is designated by s. If rdbuf()->in_avail() =3D=3D -1, calls
setstate(eofbit) (which may throw ios_base::failure (27.4.4.3)), and extrac=
ts
no characters;
=E2=80=94 If rdbuf()->in_avail() =3D=3D 0, extracts no characters
=E2=80=94 If rdbuf()->in_avail() > 0, extracts min(rdbuf()->in_avail(),n)).
31/ Returns: The number of characters extracted.