[Octave-bug-tracker] [bug #53650] build: clang-6.0 compiler warnings

[Mike Miller]

Follow-up Comment #9, bug #53650 (project octave):

Ok, playing a bit more, this rewrite


    static constexpr T zero = T ();

    return std::count_if (d, d + nel,
                          [] (T elem) { return elem != zero; });


works for me with both GCC 7 and clang 6 and produces no warnings with both
compilers.

I do not feel safe making this change on stable at this point without some
testing under older compilers (GCC 4.8, clang 3.8).

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