*It also begs the question 'Why not use a function?', i.e. it is not a case wher... | Hacker News

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draegtun on Oct 18, 2011 | parent | context | favorite | on: Macros in Perl6

It also begs the question 'Why not use a function?', i.e. it is not a case where one needs a macro

The (last) example is best being a macro because it avoids running that crazily-expensive-computation() whereas a function would evaluate it.

Xurinos on Oct 18, 2011 [–]

The argument on the delayed execution issue is that you could just wrap crazily-expensive-computation() in a lambda/sub that is executed conditionally.

draegtun on Oct 18, 2011 | [–]

Indeed. However I do like the fact that Perl6 macros & functions use the same calling syntax and so are often interchangeable.

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