Yes. Really it is read-time. In CL every top level expression read-compile-load or simply load if it is compiled.
So in Racket would be natural to have (for-syntax ...) environment in #. I hope, that Racket also read toplevel form, loads it, then reads next (not reads all at once, then load first form , second form and so on). Can you invent such read-macro? Понедельник, 29 июля 2013, 21:44 -04:00 от Sam Tobin-Hochstadt <[email protected]>: >On Mon, Jul 29, 2013 at 1:53 PM, Vincent St-Amour < [email protected] > >wrote: >> Here's a quick solution: >> >> #lang racket >> >> (define-syntax-rule (hash-dot e) >> (let-syntax ([computed-e (lambda (stx) (datum->syntax #'e e))]) >> (computed-e))) >> >> (hash-dot (+ 2 3)) >> > >In CL, #. is read-time, not compile-time, evaluation, so this isn't >quite the same. It would be easy to create a read-table that enabled >this, though. You'd have to make some decision about what environment >the read-time expression sees -- I don't know what CL does here. > >Sam -- Roman Klochkov
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