original.name="TypeEquals_Valid_42"
======
>>> main.whiley


type bop is {int y, int x}

type expr is int | bop

function f(expr e) -> int:
    if e is bop:
        return e.x + e.y
    else:
        return e

public export method test() :
    int x = f(1)
    assume x == 1
    x = f({y: 10, x: 4})
    assume x == 14

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