原帖由 flw 于 2009-4-9 11:48 发表
还有,元组也是语法糖。
我一开始看到了二元组、三元组、四元组、N 元组,
还以为把一堆量用括号括起来、中间用逗号隔开,这便是元组了呢,
后来才发现原来不是这样。
二元组是二元组,三元组是三元组, ...
ghc-6.10.1支持的更少:
*Main> (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,3
8,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,7
5,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100)
<interactive>:1:0:
A 100-tuple is too large for GHC
(max size is 62)
Workaround: use nested tuples or define a data type
但是ghc-6.10.2的user's guide里面说Tuples are currently limited to size 100. |