make it independent from GUI thread, e.g. for Graph_File.write;
(* Title: Code_Test_PolyML.thy
Author: Andreas Lochbihler, ETH Zurich
Test case for test_code on PolyML
*)
theory Code_Test_PolyML imports "../Library/Code_Test" begin
test_code "14 + 7 * -12 = (140 div -2 :: integer)" in PolyML
value [PolyML] "14 + 7 * -12 :: integer"
end