[Haskell-beginners] discover data constructor without pattern matching?

[Philippe Sismondi]

On 2011-12-01, at 5:47 PM, Ozgur Akgun wrote:

> Hi,
> 
> On 1 December 2011 22:38, Philippe Sismondi <psismondi at arqux.com> wrote:
> Is it possible to discover the data constructor used to make a value without doing pattern matching?
> 
> Yes, it is.
> 
> constrName :: Data a => a -> String
> constrName = show . toConstr
> 
> http://hackage.haskell.org/packages/archive/base/latest/doc/html/Data-Data.html#v:toConstr
> 
> (You can derive Data for your data type using the language extension DeriveDataTypeable)
> 
> Hope this helps,

Wow, it sure does. Thanks a million.


> Ozgur
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.haskell.org/pipermail/beginners/attachments/20111201/acb7c210/attachment.htm>