This PR adjusts the experimental module system to make `private` the
default visibility modifier in `module`s, introducing `public` as a new
modifier instead. `public section` can be used to revert the default for
an entire section, though this is more intended to ease gradual adoption
of the new semantics such as in `Init` (and soon `Std`) where they
should be replaced by a future decl-by-decl re-review of visibilities.
This PR adjusts the experimental module system to not export the bodies
of `def`s unless opted out by the new attribute `@[expose]` on the `def`
or on a surrounding `section`.
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Co-authored-by: Markus Himmel <markus@lean-fro.org>
This PR adds missing docstrings and makes docstring style consistent for
`ForM`, `ForIn`, `ForIn'`, `ForInStep`, `IntCast`, and `NatCast`.
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Co-authored-by: Siddharth <siddu.druid@gmail.com>
This upstreams NatCast and IntCast alone independent of norm_cast in
#3322.
This will allow more efficiently upstreaming parts of Std.Data.Int
relevant for omega.
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Co-authored-by: Scott Morrison <scott.morrison@gmail.com>
