entities imported from multiple modules

4 Dec 2002

      Hi,

I would like to report what I believe is a difference of Hugs
with the Haskell'98 report, in particular the section :

http://haskell.cs.yale.edu/onlinereport/modules.html#sect5

In this section, it is mentionned that

"There is no reference to y, so it is not erroneous that distinct
entities called y are exported by both B and C. An error is only
reported if y is actually mentioned. "

However, Hugs complains:

Prelude> :load A.hs
Reading file "A.hs":
Reading file "B.hs":
Reading file "D.hs":
Reading file "B.hs":
Reading file "C.hs":
Reading file "A.hs":
ERROR A.hs - Entity "y" imported from module "B" already defined in module "C"

I consider this a bug (perhaps serious, since the whole point of
modules is name scoping), am I wrong?

Please find below the files A.hs, B.hs, C.hs, D.hs

Thank you in advance for your reply,

Best regards

Stavros

PS. I am a newcomer to Haskell, and I enjoy it a lot !!!

cougourde (Haskell) 352. cat A.hs
module A where
    import B
    import C
    tup = (b, c, d, x)

cougourde (Haskell) 353. cat B.hs
  module B( d, b, x, y ) where
    import D
    x = "x"
    y = "y"
    b = "b"

cougourde (Haskell) 354. cat C.hs
  module C( d, c, x, y ) where
    import D
    x = "x"
    y = "y"
    c = "c"

cougourde (Haskell) 355. cat D.hs
  module D( d ) where
    d = "d"

entities imported from multiple modules

Stavros Tripakis