17 May 21:16
Re: Haskell-Cafe Info Page
From: Don Stewart <dons <at> galois.com>
Subject: Re: Haskell-Cafe Info Page
Newsgroups: gmane.comp.lang.haskell.cafe
Date: 2008-05-17 19:16:30 GMT
Subject: Re: Haskell-Cafe Info Page
Newsgroups: gmane.comp.lang.haskell.cafe
Date: 2008-05-17 19:16:30 GMT
allbery: > On 2008 May 17, at 14:52, D. Gregor wrote: > > Common Lisp is a multiparadigm, general purpose programming language > that supports imperative, functional, and object-oriented programming > paradigms. Haskell is purely functional. Is this a reason why there is > not macro feature in Haskell? I feel the object-oriented paradigm of CL > and Scheme is the reason for the macro feature in these two languages. > If it's not, then what does the macro feature provide, and why isn't it > in Haskell? > > Macros in Lisp have less to do with functional vs. non-functional than > with programs and data having precisely the same form (s-expressions). > There is a macro facility of the kind you're thinking of in Haskell > (Template Haskell), but you have to work with abstract syntax tables which > look nothing like the original code. Also, laziness is used for many of the coding jobs you might use macros for. So there's less need for macros. -- Don
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