On Thu, 31 Dec 2015, Dominik Vogt wrote:
This snippet ist from the Plumhall 2014 xvs test suite:
#if CXX03 || CXX11 || CXX14
static float (*p1_)(float) = abs;
...
checkthat(__LINE__, p1_ != 0);
#endif
(With the testsuite specific macros doing the obvious). abs() is
declared as:
int abs(int j)
Am I missing some odd C++ feature or is that part of the test just
plain wrong? I don't know where to look in the C++ standard; is
this supposed to compile (with or without a warning?) or generate
an error or is it just undefined?
error: invalid conversion from ‘int (*)(int) throw ()’ to ‘float (*)(float)’
[-fpermissive]
(Of course even with -fpermissive this won't work because (at
least on my platform) ints are passed in different registers than
floats.)
There are other overloads of 'abs' declared in math.h / cmath (only in
namespace std in the second case, and there are bugs (or standard issues)
about having them in the global namespace for the first one).
--
Marc Glisse
