On 10/15/08 16:05, Larry Evans wrote:
I'd like to have an Array indices values (see http://haskell.org/onlinereport/array.html) defined on [minBound::indices ... maxBound::indices]. The attached does this; however, it also allows duplicate definitions (e.g. in the attached, the value for Term index is defined twice).
Is there a better way to do this? Maybe a way that doesn't use all the contexts? Also, is there a way to do it so that the value associated with an index is not redefined? The aforementioned array.html has:
_ -> error "Array.!: \ \multiply defined array element") suggesting it should detect redefinitions; however, the library on my system apparently doesn't do that. It will detect missing defintions with the same error found in array.html: [] -> error "Array.!: \ \undefined array element" Is this a bug in my ghc library? I'n on ubuntu and synaptic shows the ghc6 version as: 6.8.2-2ubuntu1