[Haskell-cafe] GHC API: runStmt not taking into account reloaded module

[Simon Peyton Jones]

Great.

Any chance you could add a section to
http://www.haskell.org/haskellwiki/GHC/As_a_library
to elucidate this point.  It's not an easy API, and we know for sure that this particular point has tripped at least one person up.

Simon

From: JP Moresmau [mailto:jpmoresmau at gmail.com]
Sent: 15 January 2014 16:38
To: Simon Peyton Jones
Cc: ghc-devs at haskell.org
Subject: Re: [Haskell-cafe] GHC API: runStmt not taking into account reloaded module

While writing a smaller test case, I managed to get a different error, which in turn allowed me to find this: http://www.haskell.org/pipermail/glasgow-haskell-users/2008-May/014841.html. It turns out I had the ghcLink session flag set to NoLink, it works fine with LinkInMemory! I knew it was something stupid!

Thanks, there is no need to open a ticket in the end.

JP

On Wed, Jan 15, 2014 at 10:40 AM, JP Moresmau <jpmoresmau at gmail.com<mailto:jpmoresmau at gmail.com>> wrote:
Thanks Simon, I will write a simple test case and see what happens.

JP

On Wed, Jan 15, 2014 at 10:19 AM, Simon Peyton Jones <simonpj at microsoft.com<mailto:simonpj at microsoft.com>> wrote:
That sounds odd.  Can you make a small reproducible test case, open a ticket, and attach the test?

Thanks

SImon

From: Haskell-Cafe [mailto:haskell-cafe-bounces at haskell.org<mailto:haskell-cafe-bounces at haskell.org>] On Behalf Of JP Moresmau
Sent: 14 January 2014 20:14
To: Haskell Cafe
Subject: [Haskell-cafe] GHC API: runStmt not taking into account reloaded module

It's late here and I'm probably overlooking something stupid, so I'd like if somebody could put my nose on it... I'm using the GHC API to evaluate statements. I use runStmt to get a RunResult, lookupName to get the ID for the bound names, obtainTermFromId to get the term and showTerm to display it. So I can call a function from the loaded module with some parameters and get the result. Good!
However, if I reload a module and I change the implementation of the function, runStmt still returns the old value! I know the reload worked because if I added new names, getNamesInScope returns the new names. What do I need to do to make sure the new function definitions are used? I've perused the source code of InteractiveEval and ghci but nothing stood out. I am calling setContext after load.

Thanks a million!

--
JP Moresmau
http://jpmoresmau.blogspot.com/



--
JP Moresmau
http://jpmoresmau.blogspot.com/



--
JP Moresmau
http://jpmoresmau.blogspot.com/
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