gcount() after a call to gcountSection: 31.7.5.4 [istream.unformatted] Status: Dup Submitter: Dietmar Kühl Opened: 1999-07-20 Last modified: 2016-01-28
Priority: Not Prioritized
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Duplicate of: 60
Discussion:
It is not clear which functions are to be considered unformatted
input functions. As written, it seems that all functions in 31.7.5.4 [istream.unformatted] are unformatted input functions. However, it does not
really make much sense to construct a sentry object for
gcount(), sync(), ... Also it is unclear what
happens to the gcount() if eg. gcount(),
putback(), unget(), or sync() is called:
These functions don't extract characters, some of them even
"unextract" a character. Should this still be reflected in
gcount()? Of course, it could be read as if after a call to
gcount() gcount() return 0 (the last
unformatted input function, gcount(), didn't extract any
character) and after a call to putback() gcount()
returns -1 (the last unformatted input function
putback() did "extract" back into the
stream). Correspondingly for unget(). Is this what is
intended? If so, this should be clarified. Otherwise, a corresponding
clarification should be used.
Rationale: