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wip: Implement the constraint-based arrow notation proposal

Alexis King authored 3 years ago

* wip: Add ArrowEnv, ArrowStackTup, and ArrowEnvTup
* wip: Use arrow wired-in families in typechecker
* Rewrite arrow desugaring
* Fix some arrow typing issues
* Fix most of the remaining arrow tests
* Reorganize arrow-related modules
* Tidy up a few comments
* Accept new type error output for now

  I want to improve the type error involving ArrowStackTup to hide the
  family from the error message, but that can come later.
* Accept some more modified error output in tests

  These mostly arise from making Either a wired-in type.
* Update two test cases for new control operator typing
* Expand the wired-in arrow type families in type errors

  I am not sure that this is really the right place to do this
  expansion.  It seems like it should probably go in the
  tidying/printing code, but it would be a significant expansion of the
  responsibility of tidying, so I don’t know if that makes sense yet. I
  will probably change this later.
* Rename a few things and add some new Notes
* Add another Note; rename some things; various minor refactorings

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a607f1f9 3 years ago

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README.md

GHC Testsuite Readme

For the full testsuite documentation, please see here.

Quick Guide

Commands to run testsuite:

Full testsuite: make
Using more threads: make THREADS=12
Reduced (fast) testsuite: make fast
Run a specific test: make TEST=tc054
Test a specific 'way': make WAY=optllvm
Keeping the run directory after test run: make CLEANUP=0. You will find a directory {test_name}.run in the test's source directory.
Test a specific stage of GHC: make stage=1
Skip performance tests: make SKIP_PERF_TESTS=YES
Set verbosity: make VERBOSE=n where n=0: No per-test output, n=1: Only failures, n=2: Progress output, n=3: Include commands called (default), n=4: Include perf test results unconditionally, n=5: Echo commands in subsidiary make invocations
Pass in extra GHC options: make EXTRA_HC_OPTS=-fvectorize

You can also change directory to a specific test folder to run that individual test or group of tests. For example:

$ cd tests/array
$ make

Testsuite Ways

The testsuite can be run in a variety of 'ways'. This concept refers to different ways that GHC can compile the code. For example, using the native code generator (-fasm) is one way, while using the LLVM code generator (-fllvm) is another way.

The various ways that GHC supports are defined in config/ghc

Adding Tests

Please see the more extensive documentation here.