Support stage 1 Template Haskell (non-quasi) quotes, fixes #10382.

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

1 files changed, 19 insertions, 0 deletions

diff --git a/testsuite/tests/quotes/TH_repE3.hs b/testsuite/tests/quotes/TH_repE3.hs
new file mode 100644
index 0000000000..5f0453c1a7
--- /dev/null
+++ b/testsuite/tests/quotes/TH_repE3.hs
@@ -0,0 +1,19 @@
+-- test the representation of literals and also explicit type annotations
+
+module TH_repE1
+where
+
+import Language.Haskell.TH
+
+emptyListExpr :: ExpQ
+emptyListExpr = [| [] |]
+
+singletonListExpr :: ExpQ
+singletonListExpr = [| [4] |]
+
+listExpr :: ExpQ
+listExpr = [| [4,5,6] |]
+
+consExpr :: ExpQ
+consExpr = [| 4:5:6:[] |]
+