Utility like generic compiler

[chetan dhumane]

I am looking for a utility rather a compiler which will execute the user defined scripts.There should be provision in the utility to define the syntax and grammar rules of the script.

The script is something like this

for(var i=0;i<pre.length;i++)
{
if(f('HQ17')[pre[i]].get()=='1')
{
f('HQ17c_'+[pre[i]]).set(pre[i])
}
}

[Nitesh: Please UseCodeTagsa]

[Pat Farrell]

How is this not a compiler or interpreter for a user defined syntax?

Have you studied compilers and parsers? Making your own is not that hard.

[Nitesh Kant]

Have a look at antlr

[Pat Farrell]

or Lex and Yacc for old school.

I had a compiler text book that used a pure-Java replacement for Bison/Antlr or Lex/Yacc. Clearly building a parser in Java is not that tough. And you can either emit assembly or byte-code for the JVM.

[William Brogden]

It might be easier to have your "compiler" output in a scripting language - see Jython or Groovy or Ruby.

This gives you an intermediate product that is easier to study and verify as opposed to the code-compile-crash cycle you would get if compiling to bytecodes.

Bill