* Emit warning for fixities with no export modifiers
This is to help update all the existing code to program with explicit
fixity export directives in preparation for the behavioral change where
they will become private by default.
* [ new ] Implement bit-rotation operators
Whereas `shiftR` and `shiftL` throw bits off the edge, the `rotR` and
`rotL` operations wrap the bits around to the start of the bit-stream.
* [ test ] visualise bit patterns instead
* [ fix ] print bit patterns the right way around
---------
Co-authored-by: Guillaume Allais <guillaume.allais@ens-lyon.org>
* support for system command via node backend.
* Add env var set/unset
* fix env unset function
* Update libs/base/System.idr
* modify system test to cover node and chez.
* Add base tests for env get/set
* deprecate Data.Nat.Order.decideLTE
* Add properties for LTE/GTE that produce the difference.
* remove deprecated function now that it is available in the base library.
* remove two deprecated lines.
* remove module deprecated since v0.4.0
* fix prelude reference to renamed primitive.
* finish removing Data.Num.Implementations
* remove deprecated dirEntry function.
* remove deprecated fastAppend. Update CHANGELOG.
* replace fastAppend in test case
* replace fastAppend uses in compiler.
* remove new properties that weren't actually very new.
These entries returned by `readdir` are legacy of Unix API, we don't
really need them. Most APIs do not return them (for example Java
`Files.newDirectoryStream` or Python `os.listdir`).
* add `nextDirEntry` which returns `Maybe String`, so `Nothing` on
the end of directory unlike `dirEntry` which returns unspecified error
on the end of directory
* `dirEntry` is deprecated now, but not removed because compiler depends on it
* native implementation of `dirEntry` is patched to explicitly reset `errno`
before the `readdir` call: without it end of directory and error were
indistinguishable
* test added
