Dear GHC developers, I have tested ghc-6.10.0.20080921 on * making it by ghc-6.8.2, * making it by itself, * the DoCon and Dumatel applications. It looks all right. Regards, ----------------- Serge Mechveliani mechvel@botik.ru
Do you have libedit on your linux machine (because I haven't)? In order to check this: Does "ghc-pkg list" the editline package? (And do your arrow keys and backspace work in ghci?) Thanks Christian Serge D. Mechveliani wrote:
This was on Linux, Debian.
I have tested ghc-6.10.0.20080921 on * making it by ghc-6.8.2, * making it by itself, * the DoCon and Dumatel applications.
On Wed, Sep 24, 2008 at 05:32:51PM +0200, Christian Maeder wrote:
Do you have libedit on your linux machine (because I haven't)?
I do not know what is libedit and where to find it.
In order to check this: Does "ghc-pkg list" the editline package? (And do your arrow keys and backspace work in ghci?)
1. ghc-pkg list does not show the editline package. 2. The arrow keys and backspace do not work in ghci. This is so -- on my machine, under Debian Linux. Dear GHC developers, can you comment, please? Is this due to some deficiency in Debian Linux installation or this is a bug in the GHC installation? Regards, ----------------- Serge Mechveliani mechvel@botik.ru
This was on Linux, Debian. I have tested ghc-6.10.0.20080921
on * making it by ghc-6.8.2, * making it by itself, * the DoCon and Dumatel applications.
Serge D. Mechveliani wrote:
On Wed, Sep 24, 2008 at 05:32:51PM +0200, Christian Maeder wrote:
Do you have libedit on your linux machine (because I haven't)?
I do not know what is libedit and where to find it.
It's the library needed for editline http://hackage.haskell.org/cgi-bin/hackage-scripts/package/editline editline is the replacement of readline. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/readline
1. ghc-pkg list does not show the editline package. 2. The arrow keys and backspace do not work in ghci. This is so -- on my machine, under Debian Linux.
The advantage is ghci works without editline and readline. The disadvantage is if you want arrow keys and backspace to work, you should have installed http://www.thrysoee.dk/editline/ first.
Is this due to some deficiency in Debian Linux installation or this is a bug in the GHC installation?
A (debian) package manager could install editline (and gmp) before ghc. (Unfortunately user programs may depend on those extra libraries, too.) Christian
* Christian Maeder
Serge D. Mechveliani wrote:
On Wed, Sep 24, 2008 at 05:32:51PM +0200, Christian Maeder wrote:
Do you have libedit on your linux machine (because I haven't)?
I do not know what is libedit and where to find it.
It's the library needed for editline http://hackage.haskell.org/cgi-bin/hackage-scripts/package/editline
editline is the replacement of readline. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/readline
1. ghc-pkg list does not show the editline package. 2. The arrow keys and backspace do not work in ghci. This is so -- on my machine, under Debian Linux.
The advantage is ghci works without editline and readline. The disadvantage is if you want arrow keys and backspace to work, you should have installed http://www.thrysoee.dk/editline/ first.
Is this due to some deficiency in Debian Linux installation or this is a bug in the GHC installation?
A (debian) package manager could install editline (and gmp) before ghc. (Unfortunately user programs may depend on those extra libraries, too.)
libedit on Debian is very out-dated[1]. Haskell bindings (editline) doesn't compile against it (at least I could not compile it). 1. http://packages.qa.debian.org/e/editline.html -- Roman I. Cheplyaka :: http://ro-che.info/ kzm: My program contains a bug. How ungrateful, after all I've done for it.
The advantage is ghci works without editline and readline. The disadvantage is if you want arrow keys and backspace to work, you should have installed http://www.thrysoee.dk/editline/ first. libedit on Debian is very out-dated[1]. Haskell bindings (editline) doesn't compile against it (at least I could not compile it).
There was also no working libedit for mingw last time I checked (shelarcy was working on a patch at the time - did that work out?). Would it be possible to use haskeline as a fallback/default, for future Ghc's? http://hackage.haskell.org/cgi-bin/hackage-scripts/package/haskeline Claus
On Wed, Sep 24, 2008 at 10:56 AM, Claus Reinke
The advantage is ghci works without editline and readline. The disadvantage is if you want arrow keys and backspace to work, you should have installed http://www.thrysoee.dk/editline/ first.
libedit on Debian is very out-dated[1]. Haskell bindings (editline) doesn't compile against it (at least I could not compile it).
There was also no working libedit for mingw last time I checked (shelarcy was working on a patch at the time - did that work out?).
Would it be possible to use haskeline as a fallback/default, for future Ghc's?
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/haskeline
As the author of haskeline, integrating it into ghc is on my TODO list. :-) Note that the earliest this could happen would be ghc-6.12.1, which won't be released for at least another year. But just to reiterate: 1) Other than on Windows, libedit is widely available and compatible (including Debian, which just needs the libedit-dev package). 2) The Windows console provides basic interaction even without libedit, including arrow key left/right, history, delete key, etc. (Tab completion of Haskell identifiers is the most glaring omission.) -Judah
Would it be possible to use haskeline as a fallback/default, for future Ghc's?
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/haskeline
As the author of haskeline, integrating it into ghc is on my TODO list. :-)
Good to hear!-)
Note that the earliest this could happen would be ghc-6.12.1, which won't be released for at least another year.
Why that? It wouldn't change any APIs, and if you're afraid of changing client programs that use ghci (is that likely? is the key set different from editline? and for windows, you'd only be adding line editing functionality, not removing/changing any), you can always put it behind an option. Or is the API so different that you'd have to rewrite ghci? There shouldn't be more than a handful locations affected, iirc, but they are all tuned to readline/editline's imperative API.
But just to reiterate: 1) Other than on Windows, libedit is widely available and compatible (including Debian, which just needs the libedit-dev package). 2) The Windows console provides basic interaction even without libedit, including arrow key left/right, history, delete key, etc. (Tab completion of Haskell identifiers is the most glaring omission.)
I don't mind whether it is editline or haskeline, but as a windows user, I'd like to have ghci's tab completion (it isn't limited to identifiers, either, I think) - ever since adding support for various Haskell-related completions in my Vim editing, I miss it when using ghci.. rlwrap is ok, but no proper replacement. Claus
Hi Roman, On Wed, Sep 24, 2008 at 08:35:50PM +0300, Roman Cheplyaka wrote:
libedit on Debian is very out-dated[1]. Haskell bindings (editline) doesn't compile against it (at least I could not compile it).
That's the wrong package; you need: http://packages.qa.debian.org/libe/libedit.html Thanks Ian
On Wed, Sep 24, 2008 at 07:18:28PM +0200, Christian Maeder wrote:
Serge D. Mechveliani wrote:
On Wed, Sep 24, 2008 at 05:32:51PM +0200, Christian Maeder wrote:
Do you have libedit on your linux machine (because I haven't)?
I do not know what is libedit and where to find it.
It's the library needed for editline http://hackage.haskell.org/cgi-bin/hackage-scripts/package/editline
editline is the replacement of readline. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/readline
1. ghc-pkg list does not show the editline package. 2. The arrow keys and backspace do not work in ghci. This is so -- on my machine, under Debian Linux.
The advantage is ghci works without editline and readline. The disadvantage is if you want arrow keys and backspace to work, you should have installed http://www.thrysoee.dk/editline/ first.
Is this due to some deficiency in Debian Linux installation or this is a bug in the GHC installation?
A (debian) package manager could install editline (and gmp) before ghc. (Unfortunately user programs may depend on those extra libraries, too.)
As I recall, earlier, there were needed for GHC the shared libraries gmp and libreadline.so* As I understand, I need now to install the shared library editline instead of libreadline. Is this so? But maybe, the installation procedure (configure command or make install command) should search for editline, gmp, and such, and report an error if the GHC installation does not find them? ----------------- Serge Mechveliani mechvel@botik.ru
participants (6)
-
Christian Maeder -
Claus Reinke -
Ian Lynagh -
Judah Jacobson -
Roman Cheplyaka -
Serge D. Mechveliani