So everyone else knows, I did add a handful of new functions for inserting into maps. Please see https://github.com/ChaiScript/ChaiScript/blob/master/unittests/map.chai for examples. It's also important to remember that map is a direct mapping of std::map.

I'll get a search function added as soon as I can.

-Jason

ChaiScript has never been intended for doing calculations with fast performance. If you truly need to sum 10,000 digits, make a C++ function that does it and export the function to ChaiScript. There is ChaiScript's main advantage: you can expose a C++ to ChaiScript with a simple 1 line of code, far less work than any other scripting language available.

Do you have a more real world example of the code that is slowing you down / making it so you cannot use ChaiScript in your project? Please share and I will work out optimizing for such cases.

Thanks,
Jason

var obj := Object() // alloc 200 Mb memory
var obj2 := obj.work() // alloc 100 Mb memory
var obj = 0 // free 200 Mb memory

I am trying to create a map of references.

(These are references to C++ objects, which were created in the C++ and then passed into ChaiScript. I do NOT want to copy the objects themselves into the map, but just store a map of references.)

When I do this: sub_map = [strSellStatus: offerData]

I get this error: ---------------
OTScriptChai::ExecuteScript:
Caught chaiscript::exception::eval_error:
Can not find appropriate copy constructor or 'clone' while inserting into Map..
File:
Start position, line: 0 column: 0
End position, line: 0 column: 0

Error: "Can not find appropriate copy constructor or 'clone' while inserting into Map." With parameters: (OTDB_OfferDataNym) during evaluation at (3596, 28)

===> HOW can I insert my objects into this map BY REFERENCE and without having to clone the objects?

===> Cannot find anything about this in the documentation, nor in the unittests.

===> (In fact the unittests don't show at all how to add objects to an existing map -- only how to construct one. I'm using += as a guess.)

===> I also tried to search the forum but couldn't find the search functionality. Educate me?

===> Perhaps there is some reference wrapper?
Like this: sub_map = [strSellStatus: ref offerData]
Or this: sub_map = [strSellStatus: Ref_Wrapper(offerData)]

===> Or is that the solution? (That I should just write my own "reference wrapper" class.)

Unfortunately, I still had problems. I will try to describe them.
1. I download zip archive from GitHub with latest version of ChaiScript
2. Extract the archive in "$PROJECT_FOLDER/chaiscript"
3. Do "cd chaiscript", "cmake ." and "make"

After that, in chaiscript folder appears binary "chai". It works fine(!).

Then I write some code in $PROJECT_FOLDER/main.cpp :

#include <chaiscript/chaiscript.hpp>
 
using namespace chaiscript;
 
int main()
{
    ChaiScript context;
    context.eval("print(\"hello\")");
    return 0;
}

and build it. I use QtCreator to build. On output:

g++ -c -pipe -std=c++0x -march=i686 -mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2 -Wall -W  -I/usr/share/qt/mkspecs/linux-g++ -I../dummy -Ilib/chaiscript/include -I../dummy -I. -o main.o ../dummy/main.cpp
g++ -Wl,-O1,--sort-common,--as-needed,-z,relro -Wl,-O1 -o dummy main.o     -ldl -lpthread 

it build programm called "dummy" in $PROJECT_FOLDER/../.dummy-release

next if i try to exec binary i have error like in first message of this topic.
I tried to run from different locations:
$PROJECT_FOLDER
$PROJECT_FOLDER/chaiscript
$PROJECT_FOLDER/../.dummy-release
But the problem did not disappear...

Then i check chaiscript folder. I found "libreflection.so", "libstl_extra.so", "libtest_module.so", but no "libchaiscript_stdlib.so" or some other .so files.
In CMakeList.txt i found references to flection and stl_extra libraries, but nothing about chaiscript_stdlib or something similar.

Please, help me. How to build chaiscript_stdlib library?

By the way: Why not distribute everything in a library with headers like others? =)

I'm glad you found a solution that works for you. The problem is a "feature" of the C++ language. A class does not have a vtable if it has no virtual functions. If it doesn't have a vtable, dynamic_cast cannot be used. If dynamic_cast cannot be used, I cannot support base_class.

-Jason

You can do it on a temporary basis in a local context:

var print = fun(x) : { puts("My String: " + to_string(x) + "\n"); }

but that's not really what you want.

I've made a feature request to add it.

https://github.com/ChaiScript/ChaiScript/issues/67

-Jason

It is cumbersome, I agree, but ChaiScript has a few unique challenges, trying to straddle the line between C++ and Scripting Land.

If we support automatic conversions, it makes the choice as to which version of the function to call much more complicated (say, if you had both signed and unsigned versions of a method). It also adds a fair bit of overhead to make that determination at runtime.

It might happen in the future, but it is pretty low priority right now.

-Jason

i had success binding it as std::function

chai.add( fun(std::function<float(const LocalPlayer&)>(&LocalPlayer::getHealth)), "getHealth" );

Do you plan to support automatic conversions? Or is it one of the feature of ChaiScript?
The first thing I thought, it's situation like this:
c++:

int intFunc() { ... };
unsigned int uintFunc() { ... };
void mainFunc(unsigned int value) { ... };

If i export this functions, i can do like this:

mainFunc(uintFunc());

but can't do:

mainFunc(intFunc());

and i must do:

mainFunc(unsigned_int(intFunc()));

I think it's a little uncomfortable. But this is my personal opinion. How do you look at this problem?

P.S. Sorry for bad English

Please see this task for more info and a solution to what you need: https://github.com/ChaiScript/ChaiScript/issues/25

-Jason

I have no cmake available (basically all I can work with is make). I use the official MinGW distribution http://www.mingw.org/ 32 Bit latest install from repositories.

As for the gcc usage, in your documentation: http://chaiscript.com/doxygen/index.html
The command line for compiling the first sample is

gcc main.cpp -I/path/to/chaiscript/headers -ldl -lboost_threads

EDIT:
I managed to compile the code with

g++ -std=c++11 Main.cpp src\chaiscript_stdlib.cpp -ldl -L. -Iinclude -DCHAISCRIPT_NO_THREADS -O3

#include <chaiscript/chaiscript_stdlib.hpp>
#include <chaiscript/chaiscript.hpp>
 
int main()
{
	chaiscript::ChaiScript cscr(chaiscript::Std_Lib::library());
	cscr.eval("print(\"Test\")");
 
	return 0;
}

(I had to download libdl.a for mingw, for some reason its not packed with all the other libraries)
The -O3 option seems to do the trick (source: http://permalink.gmane.org/gmane.comp.parsers.spirit.general/24423)
I guess this is really a problem with gas

And now if you excuse me, I have a new script language to mess around with