I am writing a Java program with a call to a  Haskell module  M.hs,

in order to evaluate some expression   expr.

 

A very simple idea, which I got somewhere in the net,  is to create a

Process object p  which executes a GHC command-line instruction:

 

Process p = Runtime.getRuntime();

p.exec( " ghc M.hs  -e \"expr\" " );

 

 

This would be very simple, if it worked...

 

 

My problem is that  expressions i want to evaluate involve

strings, and GHC command-line  'ghc' misinterprets some special symbols when it  parses double quoted strings. 

 

For instance,

     ghc -e  " reverse \"2<3\" "     gives an error!

 

Thus any one know a simple way around this?

 

The only one obvious to me is to create a temporary

Haskell module M_tmp.hs,  with the expression to be evaluated,

which is then executed through   a command-line instruction

like

 ghc M_tmp.hs  -e  main