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Diffstat (limited to 'test/files/pos/t2994a.scala')
-rw-r--r-- | test/files/pos/t2994a.scala | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/test/files/pos/t2994a.scala b/test/files/pos/t2994a.scala new file mode 100644 index 0000000000..cb4a389e2f --- /dev/null +++ b/test/files/pos/t2994a.scala @@ -0,0 +1,27 @@ +object Naturals { + trait NAT { + type a[s[_ <: NAT] <: NAT, z <: NAT] <: NAT + type v = a[SUCC, ZERO] + } + final class ZERO extends NAT { + type a[s[_ <: NAT] <: NAT, z <: NAT] = z + } + final class SUCC[n <: NAT] extends NAT { + type a[s[_ <: NAT] <: NAT, z <: NAT] = s[n#a[s, z]] + } + type _0 = ZERO + type _1 = SUCC[_0] + type _2 = SUCC[_1] + type _3 = SUCC[_2] + type _4 = SUCC[_3] + type _5 = SUCC[_4] + type _6 = SUCC[_5] + + + // crashes scala-2.8.0 beta1 + trait MUL[n <: NAT, m <: NAT] extends NAT { + trait curry[n[_[_], _], s[_]] { type f[z <: NAT] = n[s, z] } + type a[s[_ <: NAT] <: NAT, z <: NAT] = n#a[curry[m#a, s]#f, z] + } + +}
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