Support set literal unpacking

Resolves   #695.

coconut/compiler/compiler.py

@@ -172,7 +172,7 @@
 def set_to_tuple(tokens):
     """Converts set literal tokens to tuples."""
     internal_assert(len(tokens) == 1, "invalid set maker tokens", tokens)
-    if "comp" in tokens or "list" in tokens:
+    if "list" in tokens or "comp" in tokens or "testlist_star_expr" in tokens:
         return "(" + tokens[0] + ")"
     elif "test" in tokens:
         return "(" + tokens[0] + ",)"

coconut/compiler/grammar.py

@@ -1172,9 +1172,10 @@ class Grammar(object):
     set_m = fixto(CaselessLiteral("m"), "m")
     set_letter = set_s | set_f | set_m
     setmaker = Group(
-        addspace(new_namedexpr_test + comp_for)("comp")
-        | new_namedexpr_testlist_has_comma("list")
-        | new_namedexpr_test("test"),
+        (new_namedexpr_test + FollowedBy(rbrace))("test")
+        | (new_namedexpr_testlist_has_comma + FollowedBy(rbrace))("list")
+        | addspace(new_namedexpr_test + comp_for + FollowedBy(rbrace))("comp")
+        | (testlist_star_namedexpr + FollowedBy(rbrace))("testlist_star_expr"),
     )
     set_literal_ref = lbrace.suppress() + setmaker + rbrace.suppress()
     set_letter_literal_ref = combine(set_letter + lbrace.suppress()) + Optional(setmaker) + rbrace.suppress()

coconut/root.py

@@ -26,7 +26,7 @@
 VERSION = "2.1.1"
 VERSION_NAME = "The Spanish Inquisition"
 # False for release, int >= 1 for develop
-DEVELOP = 24
+DEVELOP = 25
 ALPHA = False  # for pre releases rather than post releases
 
 # -----------------------------------------------------------------------------------------------------------------------
@@ -138,6 +138,8 @@ def __reversed__(self):
         return _coconut.reversed(self._xrange)
     def __len__(self):
         return _coconut.len(self._xrange)
+    def __bool__(self):
+        return _coconut.bool(self._xrange)
     def __contains__(self, elem):
         return elem in self._xrange
     def __getitem__(self, index):

coconut/tests/src/cocotest/agnostic/main.coco

@@ -1331,6 +1331,8 @@ def main_test() -> bool:
     assert m{1, 1, 2} >= m{1, 1, 2} > m{1, 2} > m{} >= m{}
     assert m{1} != {1:1, 2:0}
     assert not (m{1} == {1:1, 2:0})
+    assert s{1, 2, *(2, 3, 4), *(4, 5)} == s{1, 2, 3, 4, 5}
+    assert m{1, 2, *(2, 3, 4), *(4, 5)} == m{1, 2, 2, 3, 4, 4, 5}
     return True
 
 def test_asyncio() -> bool: