#include <ruby.h> static VALUE yield_block(int argc, VALUE *argv, VALUE self) { rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS); return rb_block_call(self, rb_to_id(argv[0]), argc-1, argv+1, rb_yield_block, 0); } void Init_yield(VALUE klass) { VALUE yield = rb_define_module_under(klass, "Yield"); rb_define_method(yield, "yield_block", yield_block, -1); }