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<title>ImperativeTypeVariable - MLton Standard ML Compiler (SML Compiler)</title>
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      ImperativeTypeVariable
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In <a href="StandardML">Standard ML</a>, an imperative type variable is a type variable whose second character is a digit, as in <tt>'1a</tt> or <tt>'2b</tt>.  Imperative type variables were used as an alternative to the <a href="ValueRestriction">ValueRestriction</a> in an earlier version of SML, but no longer play a role.  They are treated exactly as other type variables. </div>



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Last edited on 2004-11-29 22:58:32 by <span title="adsl-67-124-249-200.dsl.snfc21.pacbell.net"><a href="StephenWeeks">StephenWeeks</a></span>.
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