Method current

crates/stdlib/src/contextvars.rs:129–142

(vm: &VirtualMachine)

        }

        fn current(vm: &VirtualMachine) -> PyRef<Self> {
            super::CONTEXTS.with_borrow_mut(|ctxs| {
                if let Some(ctx) = ctxs.last() {
                    ctx.clone()
                } else {
                    let ctx = Self::empty(vm);
                    ctx.inner.idx.set(0);
                    ctx.inner.entered.set(true);
                    let ctx = ctx.into_ref(&vm.ctx);
                    ctxs.push(ctx);
                    ctxs[0].clone()
                }
            })
        }

        fn contains(&self, needle: &Py<ContextVar>) -> PyResult<bool> {
            let vars = self.borrow_vars();