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fn main() { let a = alt 10 { x when x < 7 { 1 } x when x < 11 { 2 } 10 { 3 } _ { 4 } }; assert a == 2; let b = alt {x: 10, y: 20} { x when x.x < 5 && x.y < 5 { 1 } {x, y} when x == 10 && y == 20 { 2 } {x, y} { 3 } }; assert b == 2; }