import t
import stdio
import testcheck


# ClosureCallTest - minimal repro: call through a t.CPtr function pointer
# f is t.CPtr (i8*); the compiler must treat its pointee as callable.


# nonlocal test: a nested function mutates an outer local
def make_counter() -> t.CPtr:
    count: int = 0

    # Inner closure captures count
    def counter() -> int:
        nonlocal count
        count = count + 1
        return count

    return counter


def test_closure_call():
    """Verify calling a t.CPtr function pointer."""
    testcheck.section("Closure call via t.CPtr")
    f: t.CPtr = make_counter()
    v: int = f()
    testcheck.check(v == 1, "f() first call = 1", "expect 1")


def main() -> int:
    testcheck.begin("ClosureCallTest: t.CPtr function pointer call")
    test_closure_call()
    return testcheck.end()