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Before LLVM 6.0.1 (or 10.0 on Apple LLVM), there was a bug where
lines that started with an octothorpe but turned out not
to lex like pragmas would have an extra line added after them.
Since this bug has been fixed upstream and that it doesn't have dire
consequences anyways, the workaround is not really worth it
anymore - we can just tell people to update their clang version (or re-structure
their pragma code).
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This means that `html-test`, `latex-test`, `hoogle-test`, and
`hypsrc-test` now only depend on GHC boot libs. So we should
now be able to build and run these as part of GHC's testsuite. \o/
The reference output has changed very slightly, in three ways:
* we don't convert quotes back into `"` as the `xml` lib did
* we don't add extra ` ` as the `xml` lib did
* we now remove the entire footer `div` (instead of just emptying it)
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* Amend `ParserSpec` to match new Hyperlinker API
- pass in compiler info
- strip out null tokens
* Make `hypsrc-test` pass reliably
- strip out `local-*` ids
- strip out `line-*` ids from the `ClangCppBug` test
- re-accept output
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# Summary
This is a large architectural change to the Hyperlinker.
* extract link (and now also type) information from `.hie` instead
of doing ad-hoc SYB traversals of the `RenamedSource`. Also
adds a superb type-on-hover feature (#715).
* re-engineer the lexer to avoid needless string conversions. By going
directly through GHC's `P` monad and taking bytestring slices, we
avoid a ton of allocation and have better handling of position
pragmas and CPP.
In terms of performance, the Haddock side of things has gotten _much_
more efficient. Unfortunately, much of this is cancelled out by the
increased GHC workload for generating `.hie` files. For the full set of
boot libs (including `ghc`-the-library)
* the sum of total time went down by 9-10% overall
* the sum of total allocations went down by 6-7%
# Motivation
Haddock is moving towards working entirely over `.hi` and `.hie` files.
This change means we no longer need the `RenamedSource` from
`TypecheckedModule` (something which is _not_ in `.hi` files).
# Details
Along the way a bunch of things were fixed:
* Cross package (and other) links are now more reliable (#496)
* The lexer tries to recover from errors on every line (instead of at CPP
boundaries)
* `LINE`/`COLUMN` pragmas are taken into account
* filter out zero length tokens before rendering
* avoid recomputing the `ModuleName`-based `SrcMap`
* remove the last use of `Documentation.Haddock.Utf8` (see #998)
* restructure temporary folder logic for `.hi`/`.hie` model
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'spanToNewline' is used to help break apart the source into lines which
can then be partioned into CPP and non-CPP chunks. It is important that
'spanToNewline' not break apart tokens, so it needs to properly handle
things like
* block comments, possibly nested
* string literals, possibly multi-line
* CPP macros, possibly multi-line
String literals in particular were not being properly handled. The fix
is to to fall back in 'Text.Read.lex' to help lex things that are not
comments.
Fixes #837.
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* Start changing to use GHC lexer
* better cpp
* Change SrcSpan to RealSrcSpan
* Remove error
* Try to stop too many open files
* wip
* wip
* Revert "wip"
This reverts commit b605510a195f26315e3d8ca90e6d95a6737553e1.
Conflicts:
haddock-api/haddock-api.cabal
haddock-api/src/Haddock/Interface.hs
* Remove pointless 'caching'
* Use dlist rather than lists when finding vars
* Use a map rather than list
* Delete bogus comment
* Rebase followup
Things now run using the GHC lexer. There are still
- stray debug statements
- unnecessary changes w.r.t. master
* Cleaned up differences w.r.t. current Haddock HEAD
Things are looking good. quasiquotes in particular look beautiful: the
TH ones (with Haskell source inside) colour/link their contents too!
Haven't yet begun to check for possible performance problems.
* Support CPP and top-level pragmas
The support for these is hackier - but no more hacky than the existing
support.
* Tests pass, CPP is better recognized
The tests were in some cases altered: I consider the new output to be more
correct than the old one....
* Fix shrinking of source without tabs in test
* Replace 'Position'/'Span' with GHC counterparts
Replaces 'Position' -> 'GHC.RealSrcLoc' and 'Span' -> 'GHC.RealSrcSpan'.
* Nits
* Forgot entry in .cabal
* Update changelog
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And fix impredicative Polymorphism testcase.
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For reasons I don't understand the Xml representations differ despite
their textual representations being identical.
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Previously un-cleaned artifacts were kept as reference output, making
it difficult to tell what has changed and causing spurious changes in
the version control history. Here we rework this, cleaning the output
during acceptance. To accomplish this it was necessary to move to strict
I/O to ensure the reference handle was closed before accept attempts to
open the reference file.
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