[swift-evolution] Proposal: Remove % operator for floating-point types

Stephen Canon scanon at apple.com
Fri Dec 18 17:03:13 CST 2015

> On Dec 18, 2015, at 5:57 PM, Chris Lattner <clattner at apple.com> wrote:
> On Dec 18, 2015, at 1:12 PM, Stephen Canon via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> Hi everybody —
>> I’d like to propose removing the “%” operator for floating-point types.
> I support removing this - it is actively harmful for a surprising operation like this to have such short and inviting syntax.  As asked downthread, have you given any thought into whether a Decimal type would support this operation?

The same concerns apply to decimal.  It makes sense to have the operation (for both binary and decimal floating-point) as “Type.remainder(a,b)” or a free function like "remainder(a, b)”, but I would prefer not to use the operator “%” for it because it behaves very differently from integer %, and in ways that are not at all obvious to most users.

– Steve
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