[project @ 2001-03-23 17:41:32 by simonmar]

Add overlapping string pattern test.

diff --git a/ghc/tests/deSugar/should_compile/ds051.hs b/ghc/tests/deSugar/should_compile/ds051.hs
new file mode 100644 (file)
index 0000000..70c51a7
--- /dev/null
+++ b/ghc/tests/deSugar/should_compile/ds051.hs
@@ -0,0 +1,33 @@
+module ShouldCompile where
+
+-- !!! test the overlapping patterns detection.
+
+-- f1 overlaps
+f1 "ab" = []
+f1 "ab" = []
+f1 _ = []
+
+-- f2 overlaps
+f2 "ab" = []
+f2 ('a':'b':[]) = []
+f2 _ = []
+
+-- f3 overlaps
+f3 ('a':'b':[]) = []
+f3 "ab" = []
+f3 _ = []
+
+-- f4 doesn't overlap
+f4 "ab" = []
+f4 ('a':'b':'c':[]) = []
+f4 _ = []
+
+-- f5 doesn't overlap
+f5 ('a':'b':'c':[]) = []
+f5 "ab" = []
+f5 _ = []
+
+-- f6 doesn't overlap
+f6 "ab" = []
+f6 ('a':[]) = []
+f6 _ = []

diff --git a/ghc/tests/deSugar/should_compile/ds051.stderr b/ghc/tests/deSugar/should_compile/ds051.stderr
new file mode 100644 (file)
index 0000000..18554db
--- /dev/null
+++ b/ghc/tests/deSugar/should_compile/ds051.stderr
@@ -0,0 +1,9 @@
+
+ds051.hs:6: Warning: Pattern match(es) are overlapped in the definition of function `f1':
+           f1 "ab" = ...
+
+ds051.hs:11: Warning: Pattern match(es) are overlapped in the definition of function `f2':
+           f2 ('a' : ('b' : [])) = ...
+
+ds051.hs:16: Warning: Pattern match(es) are overlapped in the definition of function `f3':
+           f3 "ab" = ...