OK, this is now fixed on the 4.08 branch. In a while we'll ship binaries
for 4.08pl1.
Simon
| -----Original Message-----
| From: Martin Pokorny [mailto:[EMAIL PROTECTED]]
| Sent: 18 July 2000 04:13
| To: Simon Peyton-Jones
| Cc: Michael Weber; [EMAIL PROTECTED]
| Subject: Re: What is `AClass'?
|
|
| Well, I pared and whittled and cut away until I was left with
| remarkably little code! In the code below, when I replace the `Matrix'
| context in the `amap2' function with `IArray', the file compiles
| without a warning. Perhaps I'm still too much the novice to see an
| error on my part, but the code seems to be valid Haskell to me. I also
| have ghc 4.08 installed on my Windows NT machine at work, and the
| results were the same as on my Debian Gnu/Linux machine. This is my
| code:
|
| > module Matrix
| > where
| >
| > import IArray
| > import Ix
| >
| > class (IArray a e) => Matrix a e where
| >
| > amap2 :: (Ix ix, Matrix a d) =>
| > (e -> d -> e) -> a ix e -> a ix d -> a ix e
|
|
| And this is the output of a compiler run:
|
| > ~/projects/hs/mtx.2$ ghc -Wall -v -fglasgow-exts -c MatrixB.hs
| > The Glorious Glasgow Haskell Compilation System, version 4.08
| >
| > Effective command line: -Wall -v -fglasgow-exts -c
| >
| > Ineffective C pre-processor:
| > echo '{-# LINE 1 "MatrixB.hs" -}' > /tmp/ghc743.cpp &&
| cat MatrixB.hs >> /tmp/ghc743.cpp
| >
| > real 0m0.001s
| > user 0m0.010s
| > sys 0m0.000s
| > ghc:compile:Output file MatrixB.o doesn't exist
| > ghc:compile:Interface file MatrixB.hi doesn't exist
| > ghc:recompile:Input file MatrixB.hs newer than MatrixB.o
| >
| > Haskell compiler:
| > /usr/lib/ghc-4.08/hsc /tmp/ghc743.cpp
| -fwarn-overlapping-patterns -fwarn-missing-methods
| -fwarn-missing-fields -fwarn-deprecations
| -fwarn-duplicate-exports -fwarn-unused-binds
| -fwarn-unused-matches -fwarn-incomplete-patterns
| -fwarn-unused-imports -fwarn-type-defaults
| -fwarn-name-shadowing -fwarn-missing-signatures
| -fglasgow-exts -fignore-interface-pragmas
| -fomit-interface-pragmas -fsimplify [
| -fmax-simplifier-iterations4 ] -fwarn-overlapping-patterns
| -fwarn-missing-methods -fwarn-missing-fields
| -fwarn-deprecations -fwarn-duplicate-exports -fhi-version=408
| -static
| "-himap=.%.hi:/usr/lib/ghc-4.08/imports/lang%.hi:/usr/lib/ghc-
| 4.08/imports/lang%.hi:/usr/lib/ghc-4.08/imports/std%.hi"
| "-himap-sep=:" -v -hifile=/tmp/ghc743.hi -olang=asm
| -ofile=/tmp/ghc743.s -F=/tmp/ghc743_stb.c
| -FH=/tmp/ghc743_stb.h +RTS -H6000000 -K1000000
| > Glasgow Haskell Compiler, version 4.08, for Haskell 98,
| compiled by GHC version 4.08
| >
| > AClass
| >
| > real 0m7.321s
| > user 0m3.840s
| > sys 0m0.160s
| > deleting... /tmp/ghc743.cpp /tmp/ghc743.hi /tmp/ghc743.s
| /tmp/ghc743_stb.c /tmp/ghc743_stb.h
|
| I hope this helps.
| --
| Martin Pokorny
| mailto:[EMAIL PROTECTED]
|
