doc/guide/localhost/ImperativeTypeVariable

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  26 <h1>ImperativeTypeVariable</h1>
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  31 <div class="paragraph"><p>In <a href="StandardML">Standard ML</a>, an imperative type variable is a type
  32 variable whose second character is a digit, as in <span class="monospaced">'1a</span> or
  33 <span class="monospaced">'2b</span>.  Imperative type variables were used as an alternative to
  34 the <a href="ValueRestriction">ValueRestriction</a> in an earlier version of SML, but no longer play
  35 a role.  They are treated exactly as other type variables.</p></div>
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