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// check-pass
struct LazyLock<T> {
data: (Option<T>, fn() -> T),
}
impl<T> LazyLock<T> {
pub const fn new(f: fn() -> T) -> LazyLock<T> {
LazyLock { data: (None, f) }
}
}
struct A<T = i32>(Option<T>);
impl<T> Default for A<T> {
fn default() -> Self {
A(None)
}
}
static EMPTY_SET: LazyLock<A<i32>> = LazyLock::new(A::default);
fn main() {}
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