Commit 613737b1 authored by's avatar
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Document the fact that you can't make a newtype of an unboxed data type

parent 09d0e7d9
......@@ -381,6 +381,13 @@ worse, the unboxed value might be larger than a pointer
(<literal>Double&num;</literal> for instance).
<listitem><para> You cannot define a newtype whose representation type
(the argument type of the data constructor) is an unboxed type. Thus,
this is illegal:
newtype A = MkA Int#
<listitem><para> You cannot bind a variable with an unboxed type
in a <emphasis>top-level</emphasis> binding.
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