//ww:run-exit 3
// Migrated from 773_isas_spread_variant row spread_is_inline_variant.
package main;
import io;
type rsh = (size | io.eof | ...io.error);
export fn main() i32 = {
    let r: rsh = 42: size;
    if (r is io.underread) { return 1; };
    if (r is io.eof) { return 2; };
    if (r is size) { return 3; };
    return 0;
};