mirror of
https://github.com/Mercury-Language/mercury.git
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1c8eece402
tests/hard_coded/backend_external.m:
tests/hard_coded/backend_external_pred.m:
tests/hard_coded/c_write_string.m:
tests/hard_coded/ee_dummy.m:
tests/hard_coded/pragma_c_code.m:
tests/hard_coded/pragma_foreign_export.m:
tests/hard_coded/target_mlobjs.m:
tests/hard_coded/type_tables.m:
tests/submodules/sm_exp_bug.m:
Use don't-care variables to handle the I/O state in foreign procs.
Assigning the I/O state at the end of the foreign_proc body results
in spurious warnings about uninitialized variables from MSVC.
50 lines
1.1 KiB
Mathematica
50 lines
1.1 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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:- module pragma_foreign_export.
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:- interface.
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:- import_module io.
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:- pred main(io::di, io::uo) is det.
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:- implementation.
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main(!IO) :-
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call_foreign(!IO).
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:- pred call_foreign(io::di, io::uo) is det.
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:- pred hello_world(io::di, io::uo) is det.
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:- pragma foreign_export("C", hello_world(di, uo),
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"exported_hello_world").
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:- pragma foreign_export("C#", hello_world(di, uo),
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"exported_hello_world").
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:- pragma foreign_export("Java", hello_world(di, uo),
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"exported_hello_world").
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hello_world(!IO) :-
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io.write_string("Hello World!\n", !IO).
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:- pragma foreign_proc("C",
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call_foreign(_IO0::di, _IO::uo),
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[promise_pure, may_call_mercury],
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"
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exported_hello_world();
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").
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:- pragma foreign_proc("C#",
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call_foreign(_IO0::di, _IO::uo),
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[promise_pure, may_call_mercury],
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"
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exported_hello_world();
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").
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:- pragma foreign_proc("Java",
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call_foreign(_IO0::di, _IO::uo),
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[promise_pure, may_call_mercury],
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"
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exported_hello_world();
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").
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