// `raise` rejections (ERR step E1.3):
//   - `raise` is only valid inside a failable function,
//   - a literal `raise error.X` must name a tag in the function's set,
//   - a variable `raise e` must carry a set that is a subset of the
//     function's set.
// The positive case lives in `examples/219-raise.sx`. Parse-time rejections
// (`raise` in expression position / inside `defer` / `onfail`) are covered by
// the inline parser tests.

#import "modules/std.sx";

ParseErr :: error { BadDigit, Overflow }
OtherErr :: error { Weird }

// Literal tag not in the declared set.
bad_tag :: () -> !ParseErr {
    raise error.NotInSet;            // error: NotInSet not in ParseErr
}

// Variable whose error set is not a subset of the function's set.
makes_other :: () -> !OtherErr { return; }
relay :: () -> !ParseErr {
    e := makes_other();              // e : OtherErr
    raise e;                         // error: OtherErr not subset of ParseErr
}

main :: () -> s32 {
    x := bad_tag();                  // force bad_tag to lower
    y := relay();                    // force relay to lower
    raise error.BadDigit;            // error: main (-> s32) is not failable
    return 0;
}