tree d3b81e5f44900ebe53166d8e5d36fc1937036069
parent 556096a18a35e3e3e4f1390fd68f26a6176c21f7
author adonovan <adonovan@google.com> 1588273711 -0700
committer Copybara-Service <copybara-worker@google.com> 1588273764 -0700

bazel syntax: eject Depset from the Starlark interpreter

Depset, the Starlark wrapper, now lives alongside NestedSet,
the wrapped data type.

The interpreter still catches NestedSetException,
but now using a string hack since it cannot name the type.

Also:
- Label.TYPE (a Depset.ElementType) inlined to its sole
  use in Pinto, to avoid cmdline->nestedset dependency.
- depset tests moved from syntax.MethodLibrary to DepsetTest.
PiperOrigin-RevId: 309273148