File: test935.thp

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;; -*-theme-d-*-

;; Copyright (C) 2025  Tommi Höynälänmaa
;; Distributed under GNU General Public License version 3,
;; see file doc/GPL-3.

;; Expected results: translation and running OK

(define-proper-program (tests test935)

  (import (standard-library core)
          (tests numerical-test-env))

  (define <my-type1> (:union <list> <boolean>))

  (define-simple-method mymethod1
     (((x (:alt-maybe <my-type1>))) <boolean> nonpure) 
    (is-instance? x <my-type1>))

  (define-simple-method mymethod2
     (((x (:union (:unit-type #f) <my-type1>))) <boolean> nonpure)
    (is-instance? x <my-type1>))

  (define-main-proc (() <none> nonpure)
    (report-boolean-test (mymethod1 #f) #t)
    (report-boolean-test (mymethod2 #f) #t)))