class A; // A is in the global scope.
std::vector<::A*>
This is digraph, some combination of characters are transfered to
other token. I knew trigraph, but I did not know the digraph. I
can not believe it is introduced to ISO C++ standard
in 1999.
See Qt4's moc bug patch
Thanks for C.R. to pointed out the reason.
Also
there is a (German) Wikipedia entry about this.
Copyright (C) 2006 Yamauchi, Hitoshi
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