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rust scope lifetime entity-component-system refcell

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July 5, 2025 Score: 3 Rep: 904 Quality: High Completeness: 80%

The reborrow trick from kmdreko was almost right, you just have to reborrow both data1 and data2: (playground)

use std::cell::RefCell;
trait ScopedFetch {
    type Result);
    fn reborrowresult) -> Self::Result ScopedFetch for &RefCell {
    type Result) {
        let data = self.borrow();
        func(&data);
    }
    fn reborrowresult) -> Self::Result = (SF1::Result);
    fn fetch(&self, func: F) where F: for) {
        let (sf1, sf2) = self;
        sf1.fetch(|data1| {
            sf2.fetch(|data2| {
                let data1 = SF1::reborrowresult(data1);
                let data2 = SF2::reborrowresult(data2);
                func((data1, data2));
            });
        });
    }
    fn reborrow_result) -> Self::Result