src/test/ui/feature-gates/feature-gate-concat_idents3.rs


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const XY_1: i32 = 10;

fn main() {
    const XY_2: i32 = 20;
    assert_eq!(10, concat_idents!(X, Y_1)); //~ ERROR `concat_idents` is not stable
    assert_eq!(20, concat_idents!(X, Y_2)); //~ ERROR `concat_idents` is not stable
}