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write before BOF

Is there any runtime diagnostic required by C++ standard in
std::ofstream ofs("foo.bar");
ofs.seekp(-1,ios::beg);
ofs << "Gosh";

or is the result implementation defined as with writng past eof?

gorc
Jun 27 '08 #1
1 1807
Hi!

Gorc schrieb:
std::ofstream ofs("foo.bar");
ofs.seekp(-1,ios::beg);
I expect this to set the failbit.

Frank
Jun 27 '08 #2

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