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| Subject | Tuple literal syntax |
| From | Walter Bright <newshound2@digitalmars.com> |
| Date | Wed, 06 Oct 2010 23:04:35 -0700 |
| Newsgroups | digitalmars.D |
There have been a couple of looong threads about tuples: http://www.digitalmars.com/d/archives/digitalmars/D/Reddit_why_aren_t_people_using_D_93528.html http://www.digitalmars.com/d/archives/digitalmars/D/Should_the_comma_operator_be_removed_in_D2_101321.html A lot of it foundered on what the syntax for tuple literals should be. The top of the list is simply enclosing them in ( ). The problem with this is (expression) Is that a parenthesized expression, or a tuple? This really matters, since (e)[0] means very different things for the two. Finally, I got to thinking, why not just make it a special case: ( ) == tuple (a) == parenthesized expression (a,b) == tuple (a,b,c) == tuple (a,b,c,d) == tuple etc. No ambiguities! Only one special case. I submit this special case is rare, because who wants to define a function that returns a tuple of 1? Such will come about from generative programming, but: (a,b,c)[0] may be how the generative programming works, and that suggests: (a,0)[0] as how a user could generate a tuple of 1. Awkward, sure, but like I said, I think this would be rare. | |
Tuple literal syntax (Current message)
