| commit | 5b157d18226983a0ca11850a4b4a04c47194475b | [log] [tgz] |
|---|---|---|
| author | adonovan <adonovan@google.com> | Mon Jan 27 08:23:38 2020 -0800 |
| committer | Copybara-Service <copybara-worker@google.com> | Mon Jan 27 08:24:53 2020 -0800 |
| tree | 897b563bd5f45ef9042f64891b616f90fa016566 | |
| parent | fb452b00bbc00d811f7057291eb9997a140411cb [diff] |
bazel syntax: generalize Concatter to HasBinary, for binary operators
A Starlark value that implements HasBinary may define its own
semantics for binary operators such as x+y. See HasBinary for details.
This brings us a step closer to moving Selector{List,Value} to lib.packages.
Also:
- remove the Location parameter from the operator method.
This API simplification causes a minor usability regression:
SkylarkInfo instances created by x+y will no longer record the
location of the plus operator.
- make the control tree for binary operator cases shallower
(that is, avoid unnecessary re-tests of instanceof),
with a single fall-through.
- The specialized error message for 'in' is no longer feasible
as the set of valid operand types is no longer closed.
- Simplify arithmetic division, borrowing from go.starlark.net.
This is a breaking API change for Copybara.
PiperOrigin-RevId: 291726807
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