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Fix Set#to_h to be backwards compatible when called with a block #13248

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Fix Set#to_h to be backwards compatible when called with a block #13248

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11 changes: 11 additions & 0 deletions set.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1858,9 +1858,20 @@ set_to_hash_i(st_data_t key, st_data_t arg)
return ST_CONTINUE;
}

/*
* call-seq:
* to_h -> hash
* to_h {|element| ...} -> hash
*
* Without a block, returns a hash where the set's elements
* are keys, and all values are true. With a block, calls
* super (Enumerable#to_h).
*/
static VALUE
set_i_to_h(VALUE set)
{
if (rb_block_given_p()) return rb_call_super(0, NULL);

st_index_t size = RSET_SIZE(set);
VALUE hash;
if (RSET_COMPARE_BY_IDENTITY(set)) {
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6 changes: 6 additions & 0 deletions test/ruby/test_set.rb
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Expand Up @@ -143,6 +143,12 @@ def test_to_a
assert_equal([1,2,3], ary.sort)
end

def test_to_h
set = Set[1,2]
assert_equal({1 => true, 2 => true}, set.to_h)
assert_equal({1 => false, 2 => false}, set.to_h { [it, false] })
end

def test_flatten
# test1
set1 = Set[
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