Objective-C + MacRuby

objc-macruby.m

#import <Foundation/Foundation.h>
#import <MacRuby/MacRuby.h>

int main(void)
{
    id fooClass;
    id foo;

    [[MacRuby sharedRuntime] evaluateFileAtPath:@"test.rb"];
    fooClass = [[MacRuby sharedRuntime] evaluateString:@"Foo"];
    foo = [fooClass performRubySelector:@selector(new) withArguments:@"from Objc", NULL];
    NSLog(@"%@", foo);
    NSLog(@"%@", [foo hello]);
}

test.rb

class Foo
  def initialize(str = "")
    @str = str.to_s
  end

  def hello
    "Hello, MacRuby #{@str}"
  end
end

$ gcc objc-macruby.m -framework Foundation -framework MacRuby -fobjc-gc
$ ./a.out
2011-12-18 18:04:10.356 a.out[27436:60b] #Foo:0x400cb8e40
2011-12-18 18:04:10.365 a.out[27436:60b] Hello, MacRuby from Objc