Hello everybody! Can me somebody say how I can call a function by string? Thus I want to have a function that has as argument a string (name of a function to call) and then tries to call that function, a kind of: functionCall :: String -> [String] -> RetVal functionCall functionName arguments = ... Thanks
pvolgger:
Hello everybody! Can me somebody say how I can call a function by string? Thus I want to have a function that has as argument a string (name of a function to call) and then tries to call that function, a kind of:
functionCall :: String -> [String] -> RetVal functionCall functionName arguments = ...
You'll need to implement a symbol table, I suspect. A Map is good structure for this. -- Don
In general, you can't do that. You can only do it if you restrict the functions that can be called somehow, e.g., by having a list of callable functions and their names. Why do you want to do this? Perhaps there is a more Haskelly solution to your problem. -- Lennart On Apr 8, 2007, at 11:01 , Philipp Volgger wrote:
Hello everybody! Can me somebody say how I can call a function by string? Thus I want to have a function that has as argument a string (name of a function to call) and then tries to call that function, a kind of:
functionCall :: String -> [String] -> RetVal functionCall functionName arguments = ...
Thanks _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Well, the Haskell files are not the problem, they don't have to be built automatically. The point is that I want to call functions in a Haskell function if I get their names as strings. Isn't there any possibilty to do that? Eventually the interpreter reads also the console in to execute the input. Maybe it will be the best to look there (interpreter code of GHCi) Thank you :) Lennart Augustsson schrieb:
It sounds like you need to generate some kind of Haskell stubs given the Java signatures.
On Apr 8, 2007, at 11:16 , Philipp Volgger wrote:
Well my problem is the following. I try to make Haskell work with FIT for Java. I would like to have a 1-to-1 corresondence between the Java methods and the functions in the corresponding module in Haskell, thus they would have to have the same name and arguments/parameters. From Java I could then run the Haskell Code (by a Server), but I would like to have the possiblity to name the module, the functionname and so on.
Lennart Augustsson schrieb:
In general, you can't do that. You can only do it if you restrict the functions that can be called somehow, e.g., by having a list of callable functions and their names.
Why do you want to do this? Perhaps there is a more Haskelly solution to your problem.
-- Lennart
On Apr 8, 2007, at 11:01 , Philipp Volgger wrote:
Hello everybody! Can me somebody say how I can call a function by string? Thus I want to have a function that has as argument a string (name of a function to call) and then tries to call that function, a kind of:
functionCall :: String -> [String] -> RetVal functionCall functionName arguments = ...
Thanks _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
On Sun, Apr 08, 2007 at 03:26:25PM +0200, Philipp Volgger wrote:
Well, the Haskell files are not the problem, they don't have to be built automatically. The point is that I want to call functions in a Haskell function if I get their names as strings. Isn't there any possibilty to do that? Eventually the interpreter reads also the console in to execute the input. Maybe it will be the best to look there (interpreter code of GHCi)
Thank you :)
You probably want to look at the eval functions in hs-plugins: http://www.cse.unsw.edu.au/~dons/hs-plugins/ Yi also has a GHC-as-a-library based system you might want to look at, but it's not in a library and probably less polished overall. Stefan
participants (4)
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dons＠cse.unsw.edu.au -
Lennart Augustsson -
Philipp Volgger -
Stefan O'Rear