std.math: Implement isClose for std.complex types

[ibuclaw]

And updated newly introduced std.complex tests to use isClose instead. More precise numbers have been pulled off from wolfram (example).

[dlang-bot]

Thanks for your pull request, @ibuclaw!

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[ibuclaw]

Ping @PetarKirov as you requested this. :-)

[ibuclaw]

@thewilsonator - I don't suppose you really want tests for isClose([complex(1.0)], 1.0), do you? :-)

[ibuclaw]

Here we go again with inaccurate floating point on x86 targets. :-)

[ibuclaw]

src/core/attribute.d(139): Error: typesafe variadic functions have been removed
src/core/internal/atomic.d(1088): Error: typesafe variadic functions have been removed
src/core/time.d(3799): Error: typesafe variadic functions have been removed
src/core/time.d(3833): Error: typesafe variadic functions have been removed

Did someone accidentally hit merge on an experimental compiler feature?

[ibuclaw]

@thewilsonator - good to go if there's no other issues. Though may give it a short while for @PetarKirov to maybe chime in.

[PetarKirov]

Thanks @ibuclaw looks good to me for a quick look!