Cmplx division by 0 and NaN

[rust-highfive]

Issue by huonw
Friday Apr 05, 2013 at 08:26 GMT

For earlier discussion, see rust-lang/rust#5736

This issue was labelled with: A-libs, B-RFC, I-wrong in the Rust repository

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Should 1/(0+0i) be NaN+NaN i or fail, or something else.

see also #1284

[ghost]

There isn't much consensus among other languages:

• C++ and Racket agree when dividing by ±0.0±0.0i, but they differ when dividing by ±inf±infi.
• Python rejects division by ±0.0±0.0i, gives NaN+NaNi when dividing by a complex number where both components are infinite, and gives ±0.0±0.0i when dividing by a complex number with exactly one infinite component.
• Julia gives NaN+NaNi when dividing by ±0.0±0.0i and gives ±0.0±0.0i when dividing by a complex number where one or both of the components is infinite.

[cuviper]

This issue was moved to rust-num/num-complex#5