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Summary:
This commit adds stage 1 support for Template Haskell
quoting, e.g. [| ... expr ... |], which is useful
for authors of quasiquoter libraries that do not actually
need splices. The TemplateHaskell extension now does not
unconditionally fail; it only fails if the renamer encounters
a splice that it can't run.
In order to make sure the referenced data structures
are consistent, template-haskell is now a boot library.
There are some minor BC changes to template-haskell to make it boot
on GHC 7.8.
Note for reviewer: big diff changes are simply code
being moved out of an ifdef; there was no other substantive
change to that code.
Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
Test Plan: validate
Reviewers: simonpj, austin, goldfire
Subscribers: bgamari, thomie
Differential Revision: https://phabricator.haskell.org/D876
GHC Trac Issues: #10382
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Revert "Quick fix: drop base bound on template-haskell."
This reverts commit 3c70ae032e4361b203dfcf22b0a424e8838a5037.
Revert "Always do polymorphic typed quote check, c.f. #10384"
This reverts commit 9a43b2c1f78b3cf684646af64b9b67dc8079f58f.
Revert "RnSplice's staging test should be applied for quotes in stage1."
This reverts commit eb0ed4030374af542c0a459480d32c8d4525e48d.
Revert "Split off quotes/ from th/ for tests that can be done on stage1 compiler."
This reverts commit 21c72e7d38c96ac80d31addf67ae4b3c7a6c3bbb.
Revert "Support stage 1 Template Haskell (non-quasi) quotes, fixes #10382."
This reverts commit 28257cae77023f2ccc4cc1c0cd1fbbd329947a00.
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Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
Test Plan: run these tests with stage1
Reviewers: simonpj, austin
Subscribers: bgamari, thomie
Differential Revision: https://phabricator.haskell.org/D877
GHC Trac Issues: #10382
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