http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47007
--- Comment #5 from Tobias Burnus <burnus at gcc dot gnu.org> 2010-12-19
11:35:14 UTC ---
(In reply to comment #4)
> The standard says namelist IO will
> use whatever current decimal separator is. If locale sets
> the default to ',', then that is what should be used unless
> explicitly set by the user.
I disagree: The standard says for the OPEN statement ("9.5.6.7 DECIMAL=
specifier in the OPEN statement", quote of F2008): "If this specifier is
omitted in an OPEN statement that initiates a connection, the default value is
POINT."
Thus, for unit-based I/O the answer is clear: A decimal POINT shall be used by
default - independent of the LOCALE setting.
For internal I/O: "The initial value of a connection mode (9.5.2) is the value
that would be implied by an initial OPEN statement without the corresponding
keyword." -- Thus, DECIMAL="POINT" is the default (which can be overridden by
the "DECIMAL=" specifier in the data transfer statement - or [if a format
specification is used] by the "dp"/"dc" edit descriptors).
