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ww/test/wcc/data/r839_xmod_nominal_match/case.ww

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//ww:run-exit 42
package main;
// migrated from test/wcc/839_xmod_nominal_typeeqast.c: bare-spelled union variants matched via QUALIFIED case patterns (`case let x: e.myerr`) — cross-module nominal cover.
package e;
export type myerr = !i64;
export type res = (i64 | myerr);
export fn ok(v: i64) res = { return v; };
export fn bad() res = { return (-7: myerr); };
package main;
import e;
fn unwrap(r: e.res) i64 = {
match (r) {
case let n: i64 => return n;
case let x: e.myerr => return -1;
};
};
export fn main() i32 = {
let a = unwrap(e.ok(40));
let b = unwrap(e.bad());
if (a != 40) { return 11; };
if (b != -1) { return 12; };
return 42;
};