[commit: ghc] wip/pattern-synonyms: Add test case for explicitly-bidirectional pattern synonym (251b4a8)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : wip/pattern-synonyms
Link       : http://ghc.haskell.org/trac/ghc/changeset/251b4a8e26e26844154fe17ddd251f1833be7d5b/ghc

>---------------------------------------------------------------

commit 251b4a8e26e26844154fe17ddd251f1833be7d5b
Author: Dr. ERDI Gergo <gergo at erdi.hu>
Date:   Thu Jul 10 10:13:14 2014 +0800

    Add test case for explicitly-bidirectional pattern synonym


>---------------------------------------------------------------

251b4a8e26e26844154fe17ddd251f1833be7d5b
 testsuite/.gitignore                                     |  1 +
 testsuite/tests/patsyn/should_run/all.T                  |  1 +
 testsuite/tests/patsyn/should_run/bidir-explicit.hs      | 16 ++++++++++++++++
 .../should_run/bidir-explicit.stdout}                    |  2 ++
 4 files changed, 20 insertions(+)

diff --git a/testsuite/.gitignore b/testsuite/.gitignore
index 376318d..ae004e9 100644
--- a/testsuite/.gitignore
+++ b/testsuite/.gitignore
@@ -1058,6 +1058,7 @@ mk/ghcconfig_*_inplace_bin_ghc-stage2.exe.mk
 /tests/parser/unicode/1744
 /tests/parser/unicode/T1744
 /tests/parser/unicode/utf8_024
+/tests/patsyn/should_run/bidir-explicit
 /tests/patsyn/should_run/eval
 /tests/patsyn/should_run/ex-prov
 /tests/patsyn/should_run/ex-prov-run
diff --git a/testsuite/tests/patsyn/should_run/all.T b/testsuite/tests/patsyn/should_run/all.T
index f5936c6..f551da5 100644
--- a/testsuite/tests/patsyn/should_run/all.T
+++ b/testsuite/tests/patsyn/should_run/all.T
@@ -1,3 +1,4 @@
 test('eval', normal, compile_and_run, [''])
 test('match', normal, compile_and_run, [''])
 test('ex-prov-run', normal, compile_and_run, [''])
+test('bidir-explicit', normal, compile_and_run, [''])
diff --git a/testsuite/tests/patsyn/should_run/bidir-explicit.hs b/testsuite/tests/patsyn/should_run/bidir-explicit.hs
new file mode 100644
index 0000000..c5de877
--- /dev/null
+++ b/testsuite/tests/patsyn/should_run/bidir-explicit.hs
@@ -0,0 +1,16 @@
+{-# LANGUAGE PatternSynonyms #-}
+module Main where
+
+pattern First x <- x:_ where
+  First x = [x]
+
+pattern First' x <- x:_ where
+  First' x = foo [x, x, x]
+
+foo :: [a] -> [a]
+foo xs@(First x) = replicate (length xs + 1) x
+
+main = do
+    mapM_ print $ First ()
+    putStrLn ""
+    mapM_ print $ First' ()
diff --git a/testsuite/tests/deriving/should_run/T3087.stdout b/testsuite/tests/patsyn/should_run/bidir-explicit.stdout
similarity index 75%
copy from testsuite/tests/deriving/should_run/T3087.stdout
copy to testsuite/tests/patsyn/should_run/bidir-explicit.stdout
index 35735b4..4625e61 100644
--- a/testsuite/tests/deriving/should_run/T3087.stdout
+++ b/testsuite/tests/patsyn/should_run/bidir-explicit.stdout
@@ -1,4 +1,6 @@
 ()
+
+()
 ()
 ()
 ()