[Issue 13663] Comparison of Tuples with floating point fields

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13663

Peter Alexander <peter.alexander.au at gmail.com> changed:

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--- Comment #1 from Peter Alexander <peter.alexander.au at gmail.com> ---
There is nothing that can be done here. For user defined types (e.g. Tuple),
comparison operators are converted to calls to opCmp, i.e.

a < b    a.opCmp(b) < 0
a <= b    a.opCmp(b) <= 0
a > b    a.opCmp(b) > 0
a >= b    a.opCmp(b) >= 0

For NaN vs NaN, the comparison is neither equal, less than, nor greater than.
There is nothing that opCmp can return to give the desired semantics.

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