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Kernel#lazy added #103

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19 changes: 13 additions & 6 deletions enumerator.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1202,6 +1202,12 @@ generator_each(int argc, VALUE *argv, VALUE obj)
*
*/

static VALUE
stop_result(VALUE self)
{
return rb_attr_get(self, rb_intern("result"));
}

/* Lazy Enumerator methods */
static VALUE
lazy_init_iterator(VALUE val, VALUE m, int argc, VALUE *argv)
Expand Down Expand Up @@ -1244,6 +1250,12 @@ lazy_initialize(VALUE self, VALUE obj)
return self;
}

static VALUE
obj_to_lazy(VALUE obj)
{
return lazy_initialize(enumerator_allocate(rb_cLazy), obj);
}

/*
* call-seq:
* e.lazy -> lazy_enumerator
Expand Down Expand Up @@ -1367,17 +1379,12 @@ lazy_grep(VALUE obj, VALUE pattern)
return rb_block_call(rb_cLazy, id_new, 1, &obj, lazy_grep_func, pattern);
}

static VALUE
stop_result(VALUE self)
{
return rb_attr_get(self, rb_intern("result"));
}

void
Init_Enumerator(void)
{
rb_define_method(rb_mKernel, "to_enum", obj_to_enum, -1);
rb_define_method(rb_mKernel, "enum_for", obj_to_enum, -1);
rb_define_method(rb_mKernel, "lazy", obj_to_lazy, 0);

rb_cEnumerator = rb_define_class("Enumerator", rb_cObject);
rb_include_module(rb_cEnumerator, rb_mEnumerable);
Expand Down
1 change: 1 addition & 0 deletions test/ruby/test_lazy_enumerator.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@ def each(*args)
def test_initialize
assert_equal([1, 2, 3], [1, 2, 3].lazy.to_a)
assert_equal([1, 2, 3], Enumerable::Lazy.new([1, 2, 3]).to_a)
assert_equal([1, 2, 3], Step.new(1..3).lazy.to_a)
end

def test_each_args
Expand Down