[bitc-dev] Replacing typealias

Swaroop Sridhar swaroop at cs.jhu.edu
Wed Feb 9 23:20:36 EST 2005

On Wed, 9 Feb 2005, Jonathan S. Shapiro wrote:

> At present, we have a defining construct
> 	(typealias id type-decl)
> the purpose of this was to give a convenience name for otherwise unnamed
> types.
> The keyword TYPEALIAS stands out as inconsistent. All other defining
> forms begin with "def". I initially resisted DEFTYPE because the form
> doesn't actually define a new type -- it only binds a name to an
> existing type.
> However, I am coming to the conclusion that DEFTYPE is visually
> preferable, and the possible interpretation that
> 	(deftype nm type)
> would introduce a new, named type that was incompatible with the
> existing one seems to have faded out of the idea space in the language.
> Unless there are objections, I will rename TYPEALIAS to DEFTYPE.

My guess is that it is OK, especially because:

   C says typedef and does typealias
BitC says deftype and does typealias.


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