def un.bor_comm

bend-osdev-u32@0.1.0.0 · PROOF.bend:1864

import Base

1864def un.bor_comm(x: Bool, y: Bool) -> {Bool.or(x, y) == Bool.or(y, x) : Bool}:
1865  match x y:
1866    case True{} True{}:
1867      {==}
1868    case True{} False{}:
1869      {==}
1870    case False{} True{}:
1871      {==}
1872    case False{} False{}:
1873      {==}