First of all, yes, use the == operator, or the < operator for sorting purposes.

It's important to remember that ChaiScript is a scripting language intended specifically for C++, so C++ idioms generally apply.

Similarly, there is no string split or string tokenizer built into the current C++, so we don't have one for ChaiScript built in.

So, you'd need to write one.

Probably the easiest thing to do would be to adapt one of these examples: http://stackoverflow.com/questions/236129/how-to-split-a-string-in-c

You can either write it in ChaiScript itself, or write it in C++. If you write it in C++, I suggest having std::vector<Boxed_Value> as your return type, it would save you some pain down the road.

If you want to write it in straight ChaiScript, I'd suggest something like this:

def tokenize(str, delimiters, trimEmpty)
{
   var pos = 0;
   var lastPos = 0;
   var tokens = Vector();
 
   while(true)
   {
      pos = str.find_first_of(delimiters, lastPos);
      if(pos == npos)
      {
         pos = str.length();
 
         if(pos != lastPos || !trimEmpty)
         {
            tokens.push_back(str.substr(lastPos, pos-lastPos));
         }
         return tokens;
      }
      else
      {
         if(pos != lastPos || !trimEmpty)
            tokens.push_back(str.substr(lastPos, pos-lastPos ));
      }
 
      lastPos = pos + 1;
   }
};

I didn't have time to test this, but it should get you started if you want to write it in ChaiScript.

-Jason

I looked at the JavaScript.NET and investigated the reflection options that C++/CLI has. I think it would require a re-write of ChaiScript to support .NET. It looks like C++/CLI has runtime reflection support, but not compile time. So, the options would be to re-write ChaiScript or use it just as it is.

I could be wrong, I'm not familiar with C++/CLI. If you have ideas for how it could be implemented, let us know.

-Jason

I'd be happy to accept a patch adding this functionality. It looks like there's a few missing details from the snippet you provided here. If you are interested, fork from the git repository, add the feature and a test for it.

-Jason

ChaiScript objects should be thought of as reference types for the most part. Setting them to null would be illogical.

Can you give me a use case for why you would need to set an object to null and maybe we can evaluate it?

-Jason

They should be deleted at the end of the scope. However, we don't have as strict of a scope management as c++, so it's possible there are corner cases that are not handled properly.

The object_lifetime_test tests for scope lifetime.

-Jason

It was simply low priority for us, since you can do the same thing with nested if blocks. Now that the language is stable, I will add it as a feature request in our tracker.

-Jason

Sorry for the slow response.

You do have to map each type separately, however, you can set up a template for you to do it:

template<typename T>
void register_my_class(ChaiScript &t_chai, const std::string &t_name)
{
  t_chai.add(chaiscript::user_type(T), t_name);
  t_chai.add(fun(&T::fun1), "fun1");
  t_chai.add(fun(&T::fun2), "fun2");
}

Because of the nature of templates, there's simply no way around this. You cannot generically export a template to the scripting engine, because the compiler needs to generate the instantiations you want to use at compile time.

This technique described above is used in the ChaiScript bootstrap code. Example: https://github.com/ChaiScript/ChaiScript/blob/master/include/chaiscript/...

Yes I would like to ask the same question. I am trying to script a Math library that is "templated" mainly for precision purpose (float / double).

Instead of writing several mappings, it would be great to have a macro of some form where the typical template type(s) can be passed along with class/function registration details.

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By this I mean:

const_var x = 5
or const var x = 5

INSIDE the chaiscript language.

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