[MLton-user] Strange type problem in OS.Process

[Dan DuVarney]

Yes, you are correct. The problem originated in some old code and I
incorrectly assumed
that it was legal code. This appears to be difference between SML/NJ and
MLton. In
SML/NJ 100.65, OS.Process.status is an equality type. Thanks for the help.

-Dan


Wesley W. Terpstra wrote:
> On Fri, Nov 7, 2008 at 7:34 PM, Dan DuVarney
> <duvarney at reactive-systems.com> wrote:
>   
>> Hello world compiles and runs fine. However, MLton insists that type
>> OS.Process.status is not an equality type, which causes many programs
>> to fail to compile.
>>     
>
> http://mlton.org/basis/os-process.html lists it as 'type status', not
> an equality 'eqtype'. So I'd say this is a bug in your program, not
> MLton. Perhaps you want to use Posix.Process.fromStatus ?
>   


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Dan DuVarney
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