> Am 09.04.2016 um 19:43 schrieb Антон Жилин <[email protected]>:
> [...]
> Now, I see only 1 large question/problem risen by David Waite:
> Should precedence relationships be defined inside or outside of precedence
> groups?
> That is: should we be able to add arbitrary relationships between existing
> groups?
> [...]
I'm in favor of declaring precedence relationships inside precedencegroup
declarations. So they have a fixed place where they are defined.
The only minor syntax issue I have is that it is not immediately clear which
operators belong to a precedence group. The former syntax with the "members(+,
-)" solved this issue. However this has (currently) an extensibility problem:
If you define a new operator and it should belong to a precedencegroup where
you have no access to its source (like Additive) then the whole argument about
having operators in one place.
Another minor issue regarding your implementation of the standard library
operators: "Additive" and all "Bitwise" precedencegroups should be above "Range"
// so this is also possible without parentheses
(1+2) ... (3+5)
This issue can be brought up again during another proposal which implements
this proposal. So the standard library changes should not belong to this
proposal (or least be clarified).
Kind regards
- Maximilian
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