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author | Paul Phillips <paulp@improving.org> | 2011-08-24 17:11:55 +0000 |
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committer | Paul Phillips <paulp@improving.org> | 2011-08-24 17:11:55 +0000 |
commit | b9785280a7138a2bb52060faf94807aa0d07dec1 (patch) | |
tree | 870cc1930ac3d50cd07078260f58984224dd39a5 /test/files/pos/t0031.scala | |
parent | 84fcf633d9ca507124806d64729cb8463bcebb69 (diff) | |
download | scala-b9785280a7138a2bb52060faf94807aa0d07dec1.tar.gz scala-b9785280a7138a2bb52060faf94807aa0d07dec1.tar.bz2 scala-b9785280a7138a2bb52060faf94807aa0d07dec1.zip |
Renamed tests named bugXXX to tXXX, no review.
Diffstat (limited to 'test/files/pos/t0031.scala')
-rw-r--r-- | test/files/pos/t0031.scala | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test/files/pos/t0031.scala b/test/files/pos/t0031.scala new file mode 100644 index 0000000000..aa787ca794 --- /dev/null +++ b/test/files/pos/t0031.scala @@ -0,0 +1,29 @@ +object Main { + + trait Ensure[a] { + def ensure(postcondition: a => Boolean): a + } + + def require[a](precondition: => Boolean)(command: => a): Ensure[a] = + if (precondition) + new Ensure[a] { + def ensure(postcondition: a => Boolean): a = { + val result = command; + if (postcondition(result)) result + else error("Assertion error") + } + } + else + error("Assertion error"); + + def arb[a](s: List[a]) = + require (! s.isEmpty) { + s.head + } ensure (result => s contains result); + + def main(args: Array[String]) = { + val s = List(1, 2); + Console.println(arb(s)) + } + +} |