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(#20385)
Once we are done parsing the header of a module to obtain the options, we
look through the rest of the tokens in order to determine if they contain any
misplaced file header pragmas that would usually be ignored, potentially
resulting in bad error messages.
The warnings are reported immediately so that later errors don't shadow
over potentially helpful warnings.
Metric Increase:
T13719
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This commit renames the `getErrorMessages` and
`getMessages` function in the parser code to `getPsErrorMessages` and
`getPsMessages`, to avoid import conflicts, as we have already
`getErrorMessages` and `getMessages` defined in `GHC.Types.Error`.
Fixes #19920.
Update haddock submodule
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This is an attempt at reducing the number of dependencies of the Parser
(as reported by CountParserDeps). Modules in GHC.Parser.* don't import
GHC.Driver.Session directly anymore.
Sadly some GHC.Driver.* modules are still transitively imported and the
number of dependencies didn't decrease. But it's a step in the right
direction.
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Introduce LogFlags as a independent subset of DynFlags used for logging.
As a consequence in many places we don't have to pass both Logger and
DynFlags anymore.
The main reason for this refactoring is that I want to refactor the
systools interfaces: for now many systools functions use DynFlags both
to use the Logger and to fetch their parameters (e.g. ldInputs for the
linker). I'm interested in refactoring the way they fetch their
parameters (i.e. use dedicated XxxOpts data types instead of DynFlags)
for #19877. But if I did this refactoring before refactoring the Logger,
we would have duplicate parameters (e.g. ldInputs from DynFlags and
linkerInputs from LinkerOpts). Hence this patch first.
Some flags don't really belong to LogFlags because they are subsystem
specific (e.g. most DumpFlags). For example -ddump-asm should better be
passed in NCGConfig somehow. This patch doesn't fix this tight coupling:
the dump flags are part of the UI but they are passed all the way down
for example to infer the file name for the dumps.
Because LogFlags are a subset of the DynFlags, we must update the former
when the latter changes (not so often). As a consequence we now use
accessors to read/write DynFlags in HscEnv instead of using `hsc_dflags`
directly.
In the process I've also made some subsystems less dependent on DynFlags:
- CmmToAsm: by passing some missing flags via NCGConfig (see new fields
in GHC.CmmToAsm.Config)
- Core.Opt.*:
- by passing -dinline-check value into UnfoldingOpts
- by fixing some Core passes interfaces (e.g. CallArity, FloatIn)
that took DynFlags argument for no good reason.
- as a side-effect GHC.Core.Opt.Pipeline.doCorePass is much less
convoluted.
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This commit converts the lexers and all the parser machinery to use the
new parser types and diagnostics infrastructure. Furthermore, it cleans
up the way the parser code was emitting hints.
As a result of this systematic approach, the test output of the
`InfixAppPatErr` and `T984` tests have been changed. Previously they
would emit a `SuggestMissingDo` hint, but this was not at all helpful in
resolving the error, and it was even confusing by just looking at the
original program that triggered the errors.
Update haddock submodule
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This fixes the `devel2+werror` build combo as stage1 does not have TH
enabled.
```
utils/check-exact/Preprocess.hs:51:1: error: [-Werror]
Ignoring ANN annotations, because this is a stage-1 compiler without -fexternal-interpreter or doesn't support GHCi
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51 | {-# ANN module ("HLint: ignore Reduce duplication" :: String) #-}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```
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This commit adds GhcMessage and ancillary (PsMessage, TcRnMessage, ..)
types.
These types will be expanded to represent more errors generated
by different subsystems within GHC. Right now, they are underused,
but more will come in the glorious future.
See
https://gitlab.haskell.org/ghc/ghc/-/wikis/Errors-as-(structured)-values
for a design overview.
Along the way, lots of other things had to happen:
* Adds Semigroup and Monoid instance for Bag
* Fixes #19746 by parsing OPTIONS_GHC pragmas into Located Strings.
See GHC.Parser.Header.toArgs (moved from GHC.Utils.Misc, where it
didn't belong anyway).
* Addresses (but does not completely fix) #19709, now reporting
desugarer warnings and errors appropriately for TH splices.
Not done: reporting type-checker warnings for TH splices.
* Some small refactoring around Safe Haskell inference, in order
to keep separate classes of messages separate.
* Some small refactoring around initDsTc, in order to keep separate
classes of messages separate.
* Separate out the generation of messages (that is, the construction
of the text block) from the wrapping of messages (that is, assigning
a SrcSpan). This is more modular than the previous design, which
mixed the two.
Close #19746.
This was a collaborative effort by Alfredo di Napoli and
Richard Eisenberg, with a key assist on #19746 by Iavor
Diatchki.
Metric Increase:
MultiLayerModules
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Remove EpaAnn type synonym, rename EpaAnn' to EpaAnn.
Closes #19705
Updates haddock submodule
--
Change
data EpaAnchor = AR RealSrcSpan
| AD DeltaPos
To instead be
data EpaAnchor = AnchorReal RealSrcSpan
| AnchorDelta DeltaPos
Closes #19699
--
Change
data DeltaPos =
DP
{ deltaLine :: !Int,
deltaColumn :: !Int
}
To instead be
data DeltaPos
= SameLine { deltaColumn :: !Int }
| DifferentLine { deltaLine :: !Int, startColumn :: !Int }
Closes #19698
--
Also some clean-ups of unused parts of check-exact.
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This commit further expand on the design for #18516 by getting rid of
the `defaultReasonSeverity` in favour of a function called
`diagReasonSeverity` which correctly takes the `DynFlags` as input. The
idea is to compute the `Severity` and the `DiagnosticReason` of each
message "at birth", without doing any later re-classifications, which
are potentially error prone, as the `DynFlags` might evolve during the
course of the program.
In preparation for a proper refactoring, now `pprWarning` from the
Parser.Ppr module has been renamed to `mkParserWarn`, which now takes a
`DynFlags` as input.
We also get rid of the reclassification we were performing inside `printOrThrowWarnings`.
Last but not least, this commit removes the need for reclassify inside GHC.Tc.Errors,
and also simplifies the implementation of `maybeReportError`.
Update Haddock submodule
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Follow-up from !2418, see #19579
Updates haddock submodule
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All the comments are now captured in the AST, there is no need for a
side-channel structure for them.
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Metric Increase:
T10370
parsing001
Updates haddock submodule
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