Re: [gentoo-dev] Request to add ~> atom prefix operator on Portage.

[Ulrich Mueller]

>>>>> On Mon, 14 Sep 2015, Kent Fredric wrote:

> On 14 September 2015 at 21:04, Ulrich Mueller <ulm@g.o> wrote:
>> Well, version comparison is described in [1] and it says that
>> =cat/foo-1.020.3 will match cat/foo-1.02.3.

> Surely, as per Algorithm 2, that is false, because "020" and "02" are
> both integers, and therefor they'd default to integer comparison, and
> "020" would be deemed ">" "02"

Comparison in Algorithm 2 only takes place for the zeroth component
(i.e., "1", for the example above).

For all following numeric components Algorithm 3 is called. For the
next component, the condition in line 1 is true, so it will remove
trailing zeros (i.e., both "020" and "02" will become "02") and then
it will use stringwise comparison.

That is, versions 1.020.3 and 1.02.3 will be considered equal.

Ulrich