Lab 4 html file

[orestis lamprousis]

Hi,
i have a problem compiling my code to create the html file needed. By issuing the command hastec --output-html main-is Calculator.hs nothing happens. I include main-is because i get the error message that main cannot be found. Thank you in advance

[Leif Schelin]

If main cannot be found it seems like Haste is not installed correctly? Did you do haste-boot after the install?

[orestis lamprousis]

Yes i  do haste-boot but for every terminal session i need first to export cabal to my path by issuing the command export PATH=$PATH:~/.cabal/bin. Maybe i need to reinstall haste.

[Simon Huber]

Have you tried the hello world example of
http://www.cse.chalmers.se/edu/course/TDA555/haste.html
?

There should be no need for "main-is". (Does your Calculator.hs
actually have a "main"?)

Cheers,
Simon

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[David Sands]

> No when i try to explicitly set main:: IO () it throws an exception that because of the eventhandler at the > end of the file it is main:: IO Bool instead of main::IO()

OK, so we found the problem. You can only compile something of type main::IO(). 

The event handler should not be at the end of the main do block. 

Maybe the examples from here might help:  http://www.cse.chalmers.se/edu/course/TDA555/haste.html

[David Sands]

Problem resolved.    Anyway this is what worked, in case you come across similar issues:

> It is working eventually. I had to include -main-is Calculator.main to the command line in order to locate the main function 

Could it have been that main was not defined in the compiled module but imported?

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