Bo Persson wrote:
Steven Watanabe wrote:
AMDG
Beman Dawes wrote: ...
I missed iostreams. The problem seems to be a bug in gcc. This program: #include <utility>
int main() { std::pair<int, int*> x(0,0); return 0; }
compiles without -std=gnu++0x, but with -std=gnu++0x gets an error:
c:\gcc\bin\../lib/gcc/i386-pc-mingw32/4.4.0/../../../../include/c++/4.4.0/bits/stl_pair.h: In constr uctor 'std::pair<_T1, _T2>::pair(_U1&&, _U2&&) [with _U1 = int, _U2 = int, _T1 = int, _T2 = int*]': cvt-0-to-ptr.cpp:5: instantiated from here c:\gcc\bin\../lib/gcc/i386-pc-mingw32/4.4.0/../../../../include/c++/4.4.0/bits/stl_pair.h:90: error: invalid conversion from 'int' to 'int*'
I tried to find this in gcc bugzilla, but didn't come up with anything. Is anyone else have any knowledge of this problem?
This is a result of the addition of a templated constructor for std::pair in C++0x. gcc seems to be behaving correctly.
Yes, but that constructor is (was!) supposed to be constrained by a Constructible concept. The compiler correctly points out that the parameter fails that concept.
Interesting! .-)
This issue http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2940.html#811 is one of those solved by concepts that are now back.