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| author | Matthew Pickering <matthewtpickering@gmail.com> | 2021-05-25 23:09:32 +0100 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-07-07 11:56:36 -0400 |
| commit | 421beb3f93d1986f0fabeaad6947e3ac4b5304ea (patch) | |
| tree | e690be1faa34f6af0be661689b89a4e181b96856 /compiler/ghc.cabal.in | |
| parent | 6618008b5338ae43d8a362c31c5d5e820ff2d61c (diff) | |
| download | haskell-421beb3f93d1986f0fabeaad6947e3ac4b5304ea.tar.gz | |
driver: Convert runPipeline to use a free monad
This patch converts the runPipeline function to be implemented in terms
of a free monad rather than the previous CompPipeline.
The advantages of this are three-fold:
1. Different parts of the pipeline can return different results, the
limits of runPipeline were being pushed already by !5555, this opens up
futher fine-grainedism of the pipeline.
2. The same mechanism can be extended to build-plan at the module level
so the whole build plan can be expressed in terms of one computation
which can then be treated uniformly.
3. The pipeline monad can now be interpreted in different ways, for
example, you may want to interpret the `TPhase` action into the monad
for your own build system (such as shake). That bit will probably
require a bit more work, but this is a step in the right directin.
There are a few more modules containing useful functions for interacting
with the pipelines.
* GHC.Driver.Pipeline: Functions for building pipelines at a high-level
* GHC.Driver.Pipeline.Execute: Functions for providing the default
interpretation of TPhase, in terms of normal IO.
* GHC.Driver.Pipeline.Phases: The home for TPhase, the typed phase data
type which dictates what the phases are.
* GHC.Driver.Pipeline.Monad: Definitions to do with the TPipelineClass
and MonadUse class.
Hooks consumers may notice the type of the `phaseHook` has got
slightly more restrictive, you can now no longer control the
continuation of the pipeline by returning the next phase to execute but
only override individual phases. If this is a problem then please open
an issue and we will work out a solution.
-------------------------
Metric Decrease:
T4029
-------------------------
Diffstat (limited to 'compiler/ghc.cabal.in')
| -rw-r--r-- | compiler/ghc.cabal.in | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/ghc.cabal.in b/compiler/ghc.cabal.in index 7a70d9b359..d9a079e4a3 100644 --- a/compiler/ghc.cabal.in +++ b/compiler/ghc.cabal.in @@ -406,6 +406,8 @@ Library GHC.Driver.Monad GHC.Driver.Phases GHC.Driver.Pipeline + GHC.Driver.Pipeline.Execute + GHC.Driver.Pipeline.Phases GHC.Driver.Pipeline.Monad GHC.Driver.Plugins GHC.Driver.Ppr |