The following code:
template<class Tp, int Nm> inline Tp* end(Tp (&arr)[Nm]) { return arr + Nm; }
struct S { int end; };
bool negative(const S& s) { return s.end < 0; }
template <typename T> bool tnegative(const T& t) { return t.end < 0; }
produces a parse error misrecognising the final line's "end < 0" as a template:
end3.cpp: In function ‘bool tnegative(const T&)’:
end3.cpp:6:61: error: parse error in template argument list
template <typename T> bool tnegative(const T& t) { return t.end < 0; }
^~~~~~~
This message is from current trunk GCC, but similar error messages are produced by GCC 4.4 and 5.1.
It seems clear to me that "t.end < 0" isn't supposed to be any kind of template invocation, so I was surprised by this message. Is there some standardese that I've missed that requires this to be parsed like this in a template function? Or is this a G++ parser bug? (I did a brief bugzilla search, but nothing similar leapt out at me.)
(This is distilled down from https://bugs.debian.org/812294 in which code has an "end" field and is "using namespace std", and it appears that with GCC 6's C++14-by-default the field is colliding with some recentish std::end(). So various workarounds are available, probably starting with not using namespace std!)
Thanks,
John
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