Hi Laurent,Thanks for the explanation. A related question: how to get the "main/self" object of the macruby runtime? On Mon, Jul 27, 2009 at 6:50 AM, Laurent Sansonetti <lsansonetti@apple.com>wrote:
Hi Linan,
You can't really assign a Ruby local variable from Objective-C, since Ruby locals are generally scoped around a particular method, but you can assign to an instance variable of a given object, a constant, a global variable (or eventually a class variable, but this is evil, don't try that). Additionally, you can evaluate a local variable assignment of a given Binding object from Objective-C, but this becomes hardcore.
A simple example, setting an instance variable of an object created from a Ruby class from Objective-C:
$ cat /tmp/t.m #import <MacRuby/MacRuby.h>
int main(void) { [[MacRuby sharedRuntime] evaluateString:@"class Foo; def foo; @foo; end; end"]; id obj = [NSClassFromString(@"Foo") new]; NSLog(@"-> %@", [obj performRubySelector:@selector(foo)]); [obj performRubySelector:@selector(instance_variable_set:) withArguments: @"@foo", @"hello", nil]; NSLog(@"-> %@", [obj performRubySelector:@selector(foo)]); [obj performRubySelector:@selector(instance_variable_set:) withArguments: @"@foo", @"world", nil]; NSLog(@"-> %@", [obj performRubySelector:@selector(foo)]); }
$ gcc /tmp/t.m -o /tmp/t -fobjc-gc -framework MacRuby -framework Foundation
$ /tmp/t 2009-07-26 22:48:29.366 t[53439:903] -> <null> 2009-07-26 22:48:29.368 t[53439:903] -> hello 2009-07-26 22:48:29.369 t[53439:903] -> world
HTH, Laurent
On Jul 26, 2009, at 5:10 PM, Linan Wang wrote:
Hi everybody,
I'm trying to migrate from FScript to MacRuby. The problem I'm facing now is how to assign values to variables in the macruby runtime with objc codes. In Fscript framework, it's fairly straightforward: setObject:forIdentifier call of FSInterpreter. I've tried rb_define_varible but it does not work. seems it requires rb_objc_ocval_to_rval function call to convert the objc object to ruby object first. Any help is appreciated. Thanks
-- Best regards
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-- Best regards Linan Wang