On Saturday, 1 October 2016 at 17:53:44 UTC, Russel Winder wrote:
On Sat, 2016-10-01 at 14:55 +0000, Chris Wright via
Digitalmars-d wrote:
Groovy doesn't allow you to overload comparison operators
individually,
and probably most JVM languages likewise. This is to retain
compatibility
with Java, which has `.compareTo()` instead of `isLessThan()`
etc.
Yes it does. http://groovy-lang.org/operators.html
There is *also* compareTo.
Ruby allows you to override individual comparison operators,
with a
special operator `<=>` for combined comparisons. Nim lets you
overload
arbitrary operators and create your own; some old discussions
suggest
that the Comparable type is based on `<` alone.
Groovy also supports the spaceship operator.
`<=>` exists for the general case, which is what `opCmp` covers
in D. Overloading each relational operator individually is made
possible to address any sort of special cases.
The issue being, in D there is no room for any manner of special
case.
